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Journal articles on the topic 'Surfactants'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Fatma Abouzeid and Sultanah Alshammery. "Surfactants in electrochemical applications: A review." GSC Advanced Research and Reviews 22, no. 1 (2025): 151–61. https://doi.org/10.30574/gscarr.2025.22.1.0003.

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Surfactants have been commonly used as corrosion inhibitors to protect metallic materials against corrosion. Also used as additives for electropolishing baths to improve surface texture. The amphiphilic nature of surfactant molecules creates an affinity for adsorption at interfaces such as metal/metal oxide–water interface. The adsorption of surfactants on metals and metal oxides creates a barrier that can inhibit corrosion. The surfactant's properties and the surfactant's interaction with metal or metal oxide and the surrounding solution environments determine the level of adsorption and corr

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2

Cheng, Chao, and Shi-Yong Ran. "Interaction between DNA and Trimethyl-Ammonium Bromides with Different Alkyl Chain Lengths." Scientific World Journal 2014 (2014): 1–9. http://dx.doi.org/10.1155/2014/863049.

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The interaction betweenλ—DNA and cationic surfactants with varying alkyl chain lengths was investigated. By dynamic light scattering method, the trimethyl-ammonium bromides-DNA complex formation was shown to be dependent on the length of the surfactant’s alkyl chain. For surfactants with sufficient long alkyl chain (CTAB, TTAB, DTAB), the compacted particles exist with a size of ~60–110 nm at low surfactant concentrations. In contrast, high concentration of surfactants leads to aggregates with increased sizes. Atomic force microscope scanning also supports the above observation. Zeta potential

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Benedicto, Elisabet, Eva María Rubio, Diego Carou, and Coral Santacruz. "The Role of Surfactant Structure on the Development of a Sustainable and Effective Cutting Fluid for Machining Titanium Alloys." Metals 10, no. 10 (2020): 1388. http://dx.doi.org/10.3390/met10101388.

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In cutting operations of titanium alloys, most of the problems are related to the high consumption of cutting tools due to excessive wear. An improvement of metalworking fluid (MWF) technology would increase the productivity, sustainability, and quality of machining processes by lubricating and cooling. In this research article, the authors varied the surfactant’s charge, the hydrocarbon chain length, and the ethoxylation degree. Surfactants were dispersed at 1.2 mM in water and trimethylolpropane oleate to produce water-based MWF. Infrared reflection absorption spectroscopy and total organic

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4

Deng, Chun Min, Tian Yi Zhong, and Bao Qi Zuo. "Surfactant-Induced Nanofibrous Architecture of Silk Fibroin Hydrogels." Materials Science Forum 745-746 (February 2013): 453–58. http://dx.doi.org/10.4028/www.scientific.net/msf.745-746.453.

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Hydrogels had been prepared by blending four types of surfactants such as alkyl betaine (zwitterion surfactant), tween 60 (non-ionic surfactant), sodium fatty alcohol ether sulfate (anionic surfactant) and silicone quaternary ammonium salt (cationic surfactant) with bombyx mori silk fibroin (SF) solution. Surfactant molecules would interact with SF molecules, resulting in lower critical micelle concentration (CMC). Gelation time measurements showed surfactants had significantly accelerated the hydrogelation process of SF solution, which could be controlled by the type or blend ratio of surfact

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Li, He Lian, Rong Hui Qu, Xue Mei Han, and Jia Jun Chen. "Surfactant-Enhanced Washing of Aged PAH Contaminated Soils: Comparison between Nonionic Surfactant and Anionic Surfactant." Applied Mechanics and Materials 522-524 (February 2014): 316–21. http://dx.doi.org/10.4028/www.scientific.net/amm.522-524.316.

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Nonionic surfactants Triton X-100 (TX100), Triton X-305 and anionic surfactant SDS were used to desorb PAHs from contaminated soil. The surfactant loss due to sorption/ precipitation and PAH removal efficiency by each surfactant were evaluated. Due to sorption/precipitation, the apparent critical micelle concentration (CMCsoil) values for the 3 surfactants are 1.3-3.8 times their corresponding CMC values in aqueous solutions. The maximal surfactant loss follows the order of SDS>>TX100>TX305. The anionic surfactant SDS is quite different from nonionic surfactants TX100 and TX305 in PAH

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Md Dilawar Shahnawaz. "A small review on surfactant replacement therapy for neonates with respiratory distress syndrome." International Journal of Science and Research Archive 14, no. 2 (2025): 1372–76. https://doi.org/10.30574/ijsra.2025.14.2.0356.

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Since the early 1980s, surfactant replacement therapy (SRT) has revolutionized the treatment of neonatal respiratory distress syndrome (RDS) in premature infants, effectively addressing the surfactant deficiency associated with underdeveloped lungs. Surfactant therapy reduces alveolar surface tension, preventing lung collapse and optimizing gas exchange. Natural surfactants derived from animal sources have demonstrated superior efficacy over early protein-free synthetic surfactants, which are no longer widely available. Recent advancements include new-generation synthetic surfactants containin

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Dipak, Kumar Dhar, and Paul Debasish. "Surfactant Replacement Therapy: An Overview." International Journal of Science and Healthcare Research 5, no. 2 (2020): 399–406. https://doi.org/10.5281/zenodo.3931623.

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Pulmonary surfactant is a soap-like chemical synthesized by type II alveolar pneumocytes and is a mixture of phospholipids (predominantly dipalmitoylphosphatidylcholine), some other lipids and proteins. Its main functions include lowering the surface tension and maintaining the stability of alveoli. The first documented trial involving exogenous use of surfactants as a therapy was recorded in early 1970s using synthetically produced phospholipid mixtures once the chemical composition of surfactants was deciphered. Gradually there was a transition to the use of more natural sources. And animal

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8

Lamch, Łukasz, Weronika Szczęsna, Sebastian J. Balicki, et al. "Multiheaded Cationic Surfactants with Dedicated Functionalities: Design, Synthetic Strategies, Self-Assembly and Performance." Molecules 28, no. 15 (2023): 5806. http://dx.doi.org/10.3390/molecules28155806.

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Contemporary research concerning surfactant science and technology comprises a variety of requirements relating to the design of surfactant structures with widely varying architectures to achieve physicochemical properties and dedicated functionality. Such approaches are necessary to make them applicable to modern technologies, such as nanostructure engineering, surface structurization or fine chemicals, e.g., magnetic surfactants, biocidal agents, capping and stabilizing reagents or reactive agents at interfaces. Even slight modifications of a surfactant’s molecular structure with respect to

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9

Slavova, Tatiana, Rumyana Stanimirova, Krastanka Marinova, and Krassimir Danov. "Cleansing Mechanisms and Efficacy on Artificial Skin." Molecules 30, no. 8 (2025): 1813. https://doi.org/10.3390/molecules30081813.

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A systematic study on the mechanisms of cleansing artificial skin by solutions of widely used in personal care surfactants disodium laureth sulfosuccinate (DSLSS), sodium laureth sulfate (SLES), sodium dodecyl sulfate (SDS), dodecyl trimethyl ammonium bromide (DTAB), and coco glucoside (CG), is presented. The systematic characterization of soil removal from artificial skin revealed two primary cleansing mechanisms: emulsification and roll-up. Emulsification occurs in systems with very low interfacial tension, such as sebum in SLES solutions, while dimethicone soil was only removed by roll-up.

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10

Sharma, Gaurav, and Kishore K. Mohanty. "Wettability Alteration in High-Temperature and High-Salinity Carbonate Reservoirs." SPE Journal 18, no. 04 (2013): 646–55. http://dx.doi.org/10.2118/147306-pa.

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Summary The goal of this work was to change the wettability of a carbonate rock from mixed-wet toward water-wet at high temperature and high salinity. Three types of surfactants in dilute concentrations (&lt;0.2 wt%) were used. Initial surfactant screening was performed on the basis of aqueous stability at these harsh conditions. Contact-angle experiments on aged calcite plates were conducted to narrow the list of surfactants, and spontaneous-imbibition experiments were conducted on field cores for promising surfactants. Secondary waterflooding was carried out in cores with and without the

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11

Urmi, Wajiha Tasnim, M. M. Rahman, K. Kadirgama, D. Ramasamy, M. Samykano, and M. Y. Ali. "Exploring Surfactant-Enhanced Stability and Thermophysical Characteristics of Water-Ethylene Glycol-Based Al2O3-TiO2 Hybrid Nanofluids." WSEAS TRANSACTIONS ON HEAT AND MASS TRANSFER 18 (December 31, 2023): 195–206. http://dx.doi.org/10.37394/232012.2023.18.16.

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This study presents an empirical investigation into the impact of surfactant's enhanced stability and thermophysical characteristics of water-ethylene glycol (60:40) based Al2O3-TiO2 hybrid nanofluids. It aims to shed light on the nanofluid's behavior, mainly how surfactants affect its stability and thermal performance, thus contributing to advancements in heat transfer technology and engineering applications. The growing interest in nanofluids, which involves blending nanoparticles with conventional base fluids, spans diverse sectors like solar energy, heat transfer, biomedicine, and aerospac

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12

Wang, Ruiguo, Xinxin Xu, Xiaodi Shi, et al. "Promoting Efficacy and Environmental Safety of Pesticide Synergists via Non-Ionic Gemini Surfactants with Short Fluorocarbon Chains." Molecules 27, no. 19 (2022): 6753. http://dx.doi.org/10.3390/molecules27196753.

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Improving the utilization rate of pesticides is key to achieve a reduction and synergism, and adding appropriate surfactant to pesticide preparation is an effective way to improve pesticide utilization. Fluorinated surfactants have excellent surface activity, thermal and chemical stability, but long-chain linear perfluoroalkyl derivatives are highly toxic, obvious persistence and high bioaccumulation in the environment. Therefore, new strategies for designing fluorinated surfactants which combine excellent surface activity and environmental safety would be useful. In this study, four non-ionic

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13

Ramanathan, Rangasamy. "Surfactants in the Management of Respiratory Distress Syndrome in Extremely Premature Infants." Journal of Pediatric Pharmacology and Therapeutics 11, no. 3 (2006): 132–44. http://dx.doi.org/10.5863/1551-6776-11.3.132.

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Respiratory distress syndrome (RDS) is primarily due to decreased production of pulmonary surfactant, and it is associated with significant neonatal morbidity and mortality. Exogenous pulmonary surfactant therapy is currently the treatment of choice for RDS, as it demonstrates the best clinical and economic outcomes. Studies confirm the benefits of surfactant therapy to include reductions in mortality, pneumothorax, and pulmonary interstitial emphysema, as well as improvements in oxygenation and an increased rate of survival without bronchopulmonary dysplasia. Phospholipids (PL) and surfactant

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14

Qi, Zi Yuan, Ye Fei Wang, Hai Yang Yu, and Xiao Li Xu. "Study on Wettability Alteration of Quartz Surface by Surfactants." Advanced Materials Research 962-965 (June 2014): 539–43. http://dx.doi.org/10.4028/www.scientific.net/amr.962-965.539.

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In order to study the effect of surfactants on wettability of quartz surface, the dynamic contact angles of different surfactants on water-wet and oil-wet quartz surfaces were measured. The experimental results showed that the advancing contact angles of cationic surfactants, anionic surfactants and nonionic surfactants on oil-wet quartz surfaces decrease with the increase of surfactant concentrations; the wettability of water-wet quartz plates remains water-wet after treated by all three kinds of surfactants. Surfactants can reverse the wettability from oil-wet to water-wet at low concentrati

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15

Tiwari, Mehul, and Divya Bajpai Tripathy. "Soil Contaminants and Their Removal through Surfactant-Enhanced Soil Remediation: A Comprehensive Review." Sustainability 15, no. 17 (2023): 13161. http://dx.doi.org/10.3390/su151713161.

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This review provides a comprehensive analysis of the effectiveness of surfactants in enhancing the remediation of contaminated soils. The study examines recent and older research on the use of effluent treatment techniques combined with synthetic surface-active agents, bio-surfactants, and various categories of surfactants for soil reclamation purposes. The main purpose of this review is to evaluate the effectiveness of surfactants in enhancing the remediation of contaminated soils. The research question is to explore the mechanisms through which surfactants enhance soil remediation and to ass

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16

Desai, Tejas R., and Sharad G. Dixit. "Adsorption from Mixtures of Cationic/Non-Ionic Surfactants on to a Polystyrene Surface." Adsorption Science & Technology 15, no. 5 (1997): 391–405. http://dx.doi.org/10.1177/026361749701500507.

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The adsorption of cetyltrimethylammonium bromide (CTAB) and nonyl phenyl ethoxylates (NP-n, where n = 13, 20 and 30) on to polystyrene powder has been studied. Concentrations of surfactant solutions ranging from below CMC to well above CMC were investigated. In a single surfactant system, only the cationic surfactant (CTAB) was found to adsorb appreciably while nonionic surfactants showed negligible adsorption. In mixed surfactant systems, the cationic surfactant was found to induce significant co-adsorption of non-ionic surfactants. The increased adsorption of non-ionic surfactants has been a

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17

Wagner, Martin, and H. Johannes Pöpel. "Surface active agents and their influence on oxygen transfer." Water Science and Technology 34, no. 3-4 (1996): 249–56. http://dx.doi.org/10.2166/wst.1996.0438.

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Oxygen transfer rates of fine bubble aeration systems in uniform arrangement are reduced down to 40% to 70% in wastewater compared to clean water conditions. Surfactants in wastewater are the main reason for the inferior and therefore uneconomic performance. The influence of different types of surfactants (anionic and nonionic) and of their concentration on oxygen transfer is investigated at various properties of pure water (content of electrolytes, hardness) by means of extensive experiments. The main results of the investigations are:in dependence of the type of surfactant, its concentration

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18

Oktavia, Della Azlia, Romal Ramadhan, Dimas Hadi Prabowo, Alfatih Syaifurrohman, and Muslim Abdurrahman. "Surfactant Content Influence On Formation Water Compatibility." Journal La Multiapp 5, no. 5 (2024): 721–31. http://dx.doi.org/10.37899/journallamultiapp.v5i5.1598.

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In the pursuit of resolving surfactant non-solubility issues for enhanced oil recovery, this study identifies surfactants that are soluble and compatible with the formation brine of the Langgak field. Over the course of 21 days, the solubility and compatibility of 12 various surfactants were evaluated in synthetic brine with a salinity of 100 ppm and a reservoir temperature of 58˚C. The results indicated that surfactants S3 to S11 were compatible, exhibiting no signs of cloudiness or precipitation, thus making them suitable for further testing. These surfactants are recommended to proceed to p

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19

LIU, HAO-YANG, XIAN-WU ZOU, YIN-QUAN YUAN, and ZHUN-ZHI JIN. "EFFECTS OF INTERACTION WITH SOLVENT AND CHAIN CONFORMATION OF SURFACTANTS ON EMULSIFICATION." Modern Physics Letters B 15, no. 24 (2001): 1061–68. http://dx.doi.org/10.1142/s0217984901002853.

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The details of the emulsification process has been investigated by discontinuous molecular dynamic simulation. The surfactants help to bring about emulsification. The emulsification can be divided crudely into two stages: splitting and uniting process. The splitting and uniting of oil droplets occurs in this position, where surfactants at the interface is rather scarce. The effects of the conformation of surfactant chain and the strength of surfactant–water and surfactant–oil interactions on emulsification were also studied. The surfactants with longer tail and stronger surfactant–water and su

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20

Kurnia, Rani, Dian Asfriany Nurfalah, Deana Wahyuningrum, Taufan Marhaendrajana, and Utjok W.R Siagian. "Lessons Learned in Interfacial Tension Prediction Using a Mixture of Sulfonate- and Ethoxylate-based Surfactants in a Waxy Oil-brine System." Journal of Engineering and Technological Sciences 55, no. 6 (2023): 627–38. http://dx.doi.org/10.5614/j.eng.technol.sci.2023.55.6.1.

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The chemical-enhanced oil recovery (CEOR) method is applied to change reservoir rock or fluid characteristics by injecting alkaline, surfactant, and polymer or a combination of two or three of the compounds. Surfactant flooding improves oil recovery by reducing the interfacial tension between oil and water. Selecting reservoir surfactants, especially microemulsions, requires careful screening. This study predicted waxy oil system interfacial tension using surfactant mixtures at below- and above-optimum salinity. To predict the interfacial tension, microemulsion types, HLB, ideal salinity, and

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21

Kamal, Muhammad Shahzad, Syed Muhammad Shakil Hussain, and Lionel Talley Fogang. "Role of Ionic Headgroups on the Thermal, Rheological, and Foaming Properties of Novel Betaine-Based Polyoxyethylene Zwitterionic Surfactants for Enhanced Oil Recovery." Processes 7, no. 12 (2019): 908. http://dx.doi.org/10.3390/pr7120908.

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Long-term thermal stability of surfactants under harsh reservoir conditions is one of the main challenges for surfactant injection. Most of the commercially available surfactants thermally degrade or precipitate when exposed to high-temperature and high-salinity conditions. In this work, we designed and synthesized three novel betaine-based polyoxyethylene zwitterionic surfactants containing different head groups (carboxybetaine, sulfobetaine, and hydroxysulfobetaine) and bearing an unsaturated tail. The impact of the surfactant head group on the long-term thermal stability, foam stability, an

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22

Tian, Maozhang, Fan Zhang, Lu Wang, Xing Dong, Lifei Zhang, and Xia Guo. "Activity of Polyphenoloxidase in red Fuji Apples Promoted with Cationic Surfactant – Role of Surfactant Structure." Tenside Surfactants Detergents 58, no. 5 (2021): 383–93. http://dx.doi.org/10.1515/tsd-2020-2322.

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Abstract In this study, we observed the activity of polyphenoloxidase (PPO) in red Fuji apples in the presence of single-chained surfactants (including cetyl trimethyl ammonium bromide (CTAB), and dodecyl trimethyl ammonium bromide (DTAB)) and gemini surfactants (pentamethylene-α,ω-bis(dodecyl dimethyl ammonium bromide), octamethylene-α,ω-bis(dodecyl dimethyl ammonium bromide, dodecamethylene-α,ω-bis(dodecyl dimethyl ammonium bromide), pentamethylene-α,ω-bis(cetyl dimethyl ammonium bromide), and octamethylene-α,ω-bis(cetyl dimethyl ammonium bromide)). It was found that all these surfactants en

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23

Green, Jerry M. "Varying Surfactant Type Changes Quizalofop-P Herbicidal Activity." Weed Technology 11, no. 2 (1997): 298–302. http://dx.doi.org/10.1017/s0890037x00042986.

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Varying the type of nonionic surfactant greatly changed the biological activity of the ethyl ester of quizalofop-P on giant foxtail, barnyardgrass, and corn. These studies statistically evaluated 22 surfactants with widely different chemical, physical, and surface properties. Of the 14 surfactant properties analyzed, dynamic surface tension was the most important to enhance quizalofop-P activity. Alcohol ethoxylate surfactants like Genapol® 24-L-92 and Tergitol® 15-S-7 were among the most effective adjuvants. These surfactants performed significantly better than the commercial nonionic surfact

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Nagy, Roland, Réka Kothencz, Máté Hartyányi, and László Bartha. "Relationship between Some Colloidal Properties of Non-Ionic-Anionic Surfactant Mixtures." Processes 10, no. 6 (2022): 1136. http://dx.doi.org/10.3390/pr10061136.

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Non-ionic surfactants are compatible with different types of materials, therefore they can be applied in various packages. Fatty-acid derivates as non-ionic surfactants and their mixtures were investigated to study their colloidal behavior. The HLB value, the particle size, the emulsification capacity and the interfacial tension of various commercial, non-ionic surfactants, and their mixtures with sodium lauryl-ether-sulfate (SLES), were determined. The surfactant mixtures were prepared in different non-ionic: anionic surfactant ratios to examine their effect on several surfactant characterist

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Pino, Marcela Sofia, Michele Michelin, Rosa M. Rodríguez-Jasso, Alfredo Oliva-Taravilla, José A. Teixeira, and Héctor A. Ruiz. "Hot Compressed Water Pretreatment and Surfactant Effect on Enzymatic Hydrolysis Using Agave Bagasse." Energies 14, no. 16 (2021): 4746. http://dx.doi.org/10.3390/en14164746.

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Agave bagasse is a residual biomass in the production of the alcoholic beverage tequila, and therefore, it is a promising raw material in the development of biorefineries using hot compressed water pretreatment (hydrothermal processing). Surfactants application has been frequently reported as an alternative to enhance monomeric sugars production efficiency and as a possibility to reduce the enzyme loading required. Nevertheless, the surfactant’s action mechanisms in the enzymatic hydrolysis is still not elucidated. In this work, hot compressed water pretreatment was applied on agave bagasse fo

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Lu, Qiran, and Rajinder Pal. "Steady Shear Rheology and Surface Activity of Polymer-Surfactant Mixtures." Polymers 17, no. 3 (2025): 364. https://doi.org/10.3390/polym17030364.

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Understanding the interactions between polymers and surfactants is critical for designing advanced fluid systems used in applications such as enhanced oil recovery, drilling, and chemical processing. This study examines the effects of five surfactants: two anionic (Stepanol WA-100 and Stepwet DF-95), one cationic (HTAB), one zwitterionic (Amphosol CG), and one non-ionic (Alfonic 1412-3 Ethoxylate), on the steady shear rheology and surface activity of two polymers, namely cationic hydroxyethyl cellulose based polymer (LR-400) and anionic polyacrylamide based polymer (Praestol 2540TR). The polym

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27

Du, Bin, Shi Sheng Zhou, and Nan Wang. "Modification of Printing Aluminum Powders by Wet Covering Method with Composite Surfactants." Advanced Materials Research 179-180 (January 2011): 596–601. http://dx.doi.org/10.4028/www.scientific.net/amr.179-180.596.

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Considering the fact of low gloss and masking power of aluminum powder, the aluminum powder is chemically modified by wet covering with eight kinds of single surfactants such as Oleic acid, Stearic acid, Sodium dodecyl sulfonate, Sodium stearate, Polyvinyl alcohol, Polyethylene glycol, Tween-80 and Emulsifier-OP in different proportions on the surface of aluminum powder and the gloss of aluminum paste printing ink concocted with the covered aluminum powder is tested. The results show that the gloss of the aluminum powder covered by one percent Polyvinyl alcohol increases most significant. In o

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Zhang, Wannian, Feng Luo, Zhigang Gao, et al. "Study of Interfacial Properties of Anionic–Nonionic Surfactants Based on Succinic Acid Derivatives via Molecular Dynamics Simulations and the IGMH Method." Colloids and Interfaces 8, no. 4 (2024): 41. http://dx.doi.org/10.3390/colloids8040041.

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Surfactants are widely used in fields such as oil recovery and flotation. The properties and mechanisms of surfactants can be effectively studied using molecular dynamics (MD) simulations. Herein, the aggregation behavior of surfactants was studied at the oil–water interface by MD simulation, and the micro-morphology of surfactants was analyzed under a low concentration and saturated state at the oil–water interface, respectively. The visualization results of the MD simulation showed that DTOA was saturated at the oil–water interface at 120 surfactant molecules, whereas 160 surfactant molecule

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Prabhjot Kaur. "Role of surfactants in cosmetic industry." International Journal of Science and Research Archive 14, no. 1 (2025): 1599–604. https://doi.org/10.30574/ijsra.2025.14.1.0136.

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The chemical that lowers surface tension is called a surfactant. Surfactants are utilised as raw ingredients in the production of a wide range of products, including soap, surface-active ionic liquids, nanoparticles, carbon nanotube dispersions, and cosmetics. Surfactants are essential for cleaning, conditioning, and foam stabilization in shampoos, conditioners, and styling solutions. The need for novel and environmentally friendly surfactants is growing along with the cosmetics sector. Current patterns include Bio-based Surfactants, Mild Surfactants, Sustainable Processes. Amino acid and surf

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White, Graham F. "Multiple interactions in riverine biofilms - surfactant adsorption, bacterial attachment and biodegradation." Water Science and Technology 31, no. 1 (1995): 61–70. http://dx.doi.org/10.2166/wst.1995.0015.

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Many organic pollutants, especially synthetic surfactants, adsorb onto solid surfaces in natural and engineered aquatic environments. Biofilm bacteria on such surfaces make major contributions to microbial heterotrophic activity and biodegradation of organic pollutants. This paper reviews evidence for multiple interactions between surfactants, biodegradative bacteria, and sediment-liquid interfaces. Biodegradable surfactants e.g. SDS, added to a river-water microcosm were rapidly adsorb to sediment surface and stimulated the indigenous bacteria to attach to the sediment particles. Recalcitrant

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Kamal, Muhammad. "A Novel Approach to Stabilize Foam Using Fluorinated Surfactants." Energies 12, no. 6 (2019): 1163. http://dx.doi.org/10.3390/en12061163.

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Selection of surfactants for enhanced oil recovery and other upstream applications is a challenging task. For enhanced oil recovery applications, a surfactant should be thermally stable, compatible with reservoir brine, and have lower adsorption on reservoir rock, have high foamability and foam stability, and should be economically viable. Foam improves the oil recovery by increasing the viscosity of the displacing fluid and by reducing the capillary forces due to a reduction in interfacial tension. In this work, foamability and foam stability of two different surfactants were evaluated using

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Petrovic, Lidija, Verica Sovilj, Jadranka Milanovic, and Jaroslav Katona. "A conductometric investigation of hydroxypropylmethyl cellulose/sodium dodecyl sulfate/nonionic surfactant systems." Journal of the Serbian Chemical Society 79, no. 11 (2014): 1421–32. http://dx.doi.org/10.2298/jsc140321059p.

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Surfactant mixtures are very often used in various cosmetic and pharmaceutical products because they commonly act in synergism and provide more favorable properties than the single surfactants. At the same time, the 9 presence of polymers in mixtures of surfactants may lead to molecular interactions thereby affecting product stability and activity. For these reasons it is very important to determine the surfactant interactions influence on 1micellization and mixed micellization, as well as polymer-surfactants mixed micelles interactions. In this work we examined self-aggregation of nonionic su

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Hassan, Mohammed, Sadeq M. Al-Hazmi, Ibrahim A. Alhagri, et al. "Micellar Catalysis of Chemical Reactions by Mixed Surfactant Systems and Gemini Surfactants." Asian Journal of Chemistry 33, no. 7 (2021): 1471–80. http://dx.doi.org/10.14233/ajchem.2021.23187.

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Micellar catalysis exhibited by mixed surfactant systems and gemini surfactants was reviewed. The review focused on mixed surfactant systems and tried to correlate the changes in the physico-chemical properties of these systems to the variations of their catalytic activities. Mixed surfactant systems are promising as the catalytic efficiency of some single surfactants was significantly enhanced in the presence of other critically selected surfactants. The selection should consider the charge, size, and structures of the head group as well as an appropriate length of hydrocarbon tail. The overa

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Perron, Gérald, Josée Francoeur, Jacques E. Desnoyers, and Jan C. T. Kwak. "Heat capacities and volumes in aqueous polymer and polymer–surfactant solutions." Canadian Journal of Chemistry 65, no. 5 (1987): 990–95. http://dx.doi.org/10.1139/v87-169.

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The apparent molar volumes and heat capacities of aqueous mixtures of neutral polymers and ionic surfactants were measured at 25 °C. The polymers chosen were poly(vinylpyrrolidone) (PVP) and poly(ethyleneoxide) (PEO) and the surfactants were the C8, C10, and C12 homologs of sodium alkylsulfates and the C10, C12, and C16 homologs of alkyltrimethylammonium bromides. The polymer–surfactant interactions depend on the nature of both components and on the chain length of the surfactant. The thermodynamic properties of the cationic surfactants are essentially the same in the absence and presence of p

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Ikegami, Machiko, Yotaro Agata, Tarek Elkady, Mikko Hallman, David Berry, and Alan Jobe. "Comparison of Four Surfactants: In Vitro Surface Properties and Responses of Preterm Lambs to Treatment at Birth." Pediatrics 79, no. 1 (1987): 38–46. http://dx.doi.org/10.1542/peds.79.1.38.

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Natural sheep surfactant, rabbit surfactant, human surfactant, and surfactant TA were compared for in vitro surface properties and for responses of preterm lambs to treatment. Equivalent amounts of sheep, rabbit, and human surfactants were needed to lower the surface tension to less than 10 dynes/cm, whereas four times less surfactant TA similarly lowered the surface tension. Surface-spreading rates were similar for the surfactants. The surface adsorption of the batch of human surfactant tested was much slower than was adsorption of the other surfactants. Ventilation was significantly improved

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García-Cervilla, Raúl, Arturo Romero, Aurora Santos, and David Lorenzo. "Surfactant-Enhanced Solubilization of Chlorinated Organic Compounds Contained in DNAPL from Lindane Waste: Effect of Surfactant Type and pH." International Journal of Environmental Research and Public Health 17, no. 12 (2020): 4494. http://dx.doi.org/10.3390/ijerph17124494.

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Application of surfactants in the remediation of polluted sites with dense nonaqueous phase liquid (DNAPL) still requires knowledge of partitioning between surfactants and pollutants in the organic and aqueous phases and the time necessary to reach this balance. Two real DNAPLs, generated as wastes in the lindane production and taken from the polluted sites from Sabiñanigo (Spain), were used for investigating the solubilization of 28 chlorinated organic compounds (COCs) applying aqueous surfactant solutions of three nonionic surfactants (E-Mulse® 3 (E3), Tween®80 (T80), and a mixture of Tween®

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Toscano, Stefania, Giovanni La Fornara, and Daniela Romano. "Salt Spray and Surfactants Induced Morphological, Physiological, and Biochemical Responses in Callistemon citrinus (Curtis) Plants." Horticulturae 8, no. 3 (2022): 261. http://dx.doi.org/10.3390/horticulturae8030261.

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The growth and aesthetic value of ornamental plant species used near coastlines are negatively influenced by salt spray. The presence of surfactants could enhance salt damage. To analyze the influences of salt spray and surfactants alone and in combination with each other, individual Callistemon plants were subjected to different treatments for 8 weeks: a solution simulating the composition of seawater (salt spray), a solution containing an anionic surfactant (surfactant), a solution with salt spray and anionic surfactant (salt plus surfactants), and deionized water (control). To study the inf

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Doong, Ruey-an, Ya-Wen Wu, and Wen-gang Lei. "Surfactant enhanced remediation of cadmium contaminated soils." Water Science and Technology 37, no. 8 (1998): 65–71. http://dx.doi.org/10.2166/wst.1998.0309.

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An investigation involving the addition of surfactant to remediate cadmium-contaminated soils was performed to determine the optimal surfactant enhanced remediation system. Anionic (sodium dodecyl sulfate, SDS), nonionic (Triton X-100, TX100) and cationic (cetyltrimethylammonium bromide, CTAB) surfactants were used to elucidate the extraction efficiency of surfactant. EDTA and diphenylthiocarbazone (DPC) were also added to enhance the extraction efficiencies of surfactants. Moreover, the pH effect was examined to determine the optimal surfactant systems. The addition of anionic and nonionic su

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Pilipović, Ana, Ivana Vapa, Vesna Tepavčević, Gorana Puača, and Mihalj Poša. "Ternary Mixed Micelle Hexadecyltrimethylammonium Bromide—Dodecyltrimethylammonium Bromide—Sodium Deoxycholate: Gibbs Free Energy of Mixing and Excess Gibbs Energy of Mixing." Molecules 28, no. 18 (2023): 6722. http://dx.doi.org/10.3390/molecules28186722.

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Pharmaceutical, food, and cosmetic formulations often contain binary or ternary surfactant mixtures with synergistic interactions amongst micellar building blocks. Here, a ternary mixture of the surfactants hexadecyltrimethylammonium bromide, dodecyltrimethylammonium bromide, and sodium deoxycholate is examined to see if the molar fractions of the surfactants in the ternary mixed micellar pseudophase are determined by the interaction coefficients between various pairs of the surfactants or by their propensity to self-associate. Critical micelle concentrations (CMC) of the analyzed ternary mixt

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Wang, Biao, Xue Wang, Futang Hu, et al. "Study on the Properties of Compound Surfactants with PO Groups." Energies 17, no. 2 (2024): 513. http://dx.doi.org/10.3390/en17020513.

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The compound surfactant system has considerable development prospects for improving oil recovery. A synergistic effect can be achieved through the orderly arrangement of the two surfactants on the interface, which can make up for the performance defects of a single surfactant. In this paper, the effects of the number of propylene oxides (PO) in composite surfactants on interfacial tension and emulsion stability were systematically studied. The results showed that the solubility of composite surfactants was significantly improved under high-salinity conditions by adding anionic–nonionic surfact

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Riechers, Dean E., Loyd M. Wax, Rex A. Liebl, and Don G. Bullock. "Surfactant Effects on Glyphosate Efficacy." Weed Technology 9, no. 2 (1995): 281–85. http://dx.doi.org/10.1017/s0890037x00023356.

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Field and greenhouse studies were performed to examine the influence of various surfactants with glyphosate on whole plant efficacy. Relationships were examined between glyphosate phytotoxicity and surfactant properties, including ionic form, degree of ethoxylation, and hydrophobe composition. Cationic tertiary amine surfactants enhanced glyphosate performance in both field and greenhouse studies. Nonionic allinol and octoxynol surfactants were not effective in combination with glyphosate. In field studies, glyphosate efficacy increased with increasing surfactant ethylene oxide (EO) content. S

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Shalabi, Kamal, Hany M. Abd Abd El-Lateef, Mohamed M. Hammouda, Amany M. A. Osman, Ahmed H. Tantawy, and Mohamed A. Abo-Riya. "Perspectives on Corrosion Inhibition Features of Novel Synthesized Gemini-Fluorinated Cationic Surfactants Bearing Varied Spacers for Acid Pickling of X60-Steel: Practical, and In Silico Calculations." Materials 16, no. 14 (2023): 5192. http://dx.doi.org/10.3390/ma16145192.

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Through our present study, three novel Gemini-fluorinated cationic surfactants bearing different spacers (FSG6-2, FSG6-4, and FSG6-6) were synthesized, and their structures were explained via different spectroscopic instruments such as 1H, 13C, and 19F NMR spectra. The surface activity of the as-prepared surfactants was examined. The inhibiting influence of FSG6 molecules on the X60 steel corrosion in the pickling solution (HCl) was examined by diverse methods comprising electrochemical impedance spectroscopy (EIS), potentiodynamic polarization (PDP), and X-ray photoelectron spectroscopy (XPS)

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Gull, Nuzhat, Mohd Ishtikhar, Md Sayem Alam, Syedah Noorul Sabah Andrabi, and Rizwan Hasan Khan. "Spectroscopic studies on the comparative refolding of guanidinium hydrochloride denatured hen egg-white lysozyme and Rhizopus niveus lipase assisted by cationic single-chain/gemini surfactants via artificial chaperone protocol." RSC Advances 7, no. 45 (2017): 28452–60. http://dx.doi.org/10.1039/c6ra21528a.

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Sun, Yuhai, Yujun Feng, Hongwei Dong, Zhi Chen, and Likun Han. "Synthesis and aqueous solution properties of homologous gemini surfactants with different head groups." Open Chemistry 5, no. 2 (2007): 620–34. http://dx.doi.org/10.2478/s11532-006-0072-7.

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AbstractA series of homologous gemini surfactants possessing identical hydrophobic chains but different ionic head groups (cationic, anionic, zwitterionic) were synthesized, and their aqueous solution properties were examined. The results showed that the surface activities of gemini surfactants are superior to those of corresponding conventional monomeric surfactants, and molecular arrangements of gemini surfactants at the air-water interface are tighter than those of corresponding conventional surfactants. It was also found that zwitterionic gemini surfactant possesses the highest surface act

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Li, Guoqiao, Jinyi Zhao, Lu Han, et al. "The High Interfacial Activity of Betaine Surfactants Triggered by Nonionic Surfactant: The Vacancy Size Matching Mechanism of Hydrophobic Groups." Molecules 30, no. 11 (2025): 2413. https://doi.org/10.3390/molecules30112413.

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Alkyl sulfobetaine shows a strong advantage in the compounding of surfactants due to the defects in the size matching of hydrophilic and hydrophobic groups. The interfacial tensions (IFTs) of alkyl sulfobetaine (ASB) and xylene-substituted alkyl sulfobetaine (XSB) with oil-soluble (Span80) and water-soluble (Tween80) nonionic surfactants on a series of n-alkanes were studied using a spinning drop tensiometer to investigate the mechanism of IFT between nonionic and betaine surfactants. The two betaine surfactants’ IFTs are considerably impacted differently by Span80 and Tween80. The results dem

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Lv, Sheng Hua, Gong Rui, and Guo Yun Zhang. "Preparation and Properties of Modified Starch with Methoxy Polyethylene Glycol Methacrylate." Advanced Materials Research 455-456 (January 2012): 589–93. http://dx.doi.org/10.4028/www.scientific.net/amr.455-456.589.

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The modified starch surfactant was synthesized by grafting copolymerization of methoxy polyethylene glycol methacrylate (MPGM) with starch. The effects of monomers composition and side chain length on surface activity of starch surfactants were investigated. The modified starch surfactant was synthesized when the molar ratio of AGU (starch) and MPEGMA was 1: 0.3 at 85 °C for 2h. The FTIR result shows that starch had successfully reacted with MPGM. Modified starch surfactants are poor foam surfactant with excellent surface activity. The modified starch surfactants are biodegradable and environm

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Haq, Bashirul, Jishan Liu, Keyu Liu, and Dhafer Al Shehri. "Study of phase behaviour and ionic effect of green surfactants in MEOR." APPEA Journal 58, no. 1 (2018): 84. http://dx.doi.org/10.1071/aj17202.

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The phase behaviour of surfactant systems is an important characteristic for microbial enhanced oil recovery (MEOR) and is a key method for understanding and predicting the performance of surfactant systems. In addition, ions play a vital role in surfactant chemistry and the ionic effects of green surfactants are not yet well characterised. Green surfactants are biodegradable and environmental friendly and perceived to have great potential for MEOR. This study characterises some green anionic and non-ionic surfactants through phase behaviour study, interfacial tension (IFT) and core flooding e

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Mitru, Daniel, Gheorghe Nechifor, Stefania Gheorghe, et al. "Removal and Effects of Surfactants in Activated Sludge System." Revista de Chimie 71, no. 1 (2020): 100–106. http://dx.doi.org/10.37358/rc.20.1.7819.

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The widespread use of detergents has raised concern with regard to the environmental pollution caused by their active substances, which are biorefractory, toxic or persistent. Even though anionic and non-ionic surfactants often used in commercial detergents composition are reasonably degradable under aerobic conditions and not particularly toxic at low concentrations, high concentration of surfactants influenced the activated sludge activity and are harmful for the aquatic environment. In the literature, data on the biodegradability and/or ecotoxicity of a certain type of surfactant (anionic,

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Kitatsuji, Katsura, Hiroshi Miyata, and Tetsuro Fukase. "Lysis of filamentous bacteria by surfactants." Water Science and Technology 34, no. 5-6 (1996): 145–53. http://dx.doi.org/10.2166/wst.1996.0546.

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A microbial substance that lyses filamentous bacteria was obtained. The substance also exhibited some properties of a bio-surfactant. Lysing of filamentous bacteria with synthetic surfactants was also examined. Several synthetic surfactants were found to be capable of lysing filamentous bacteria. Nonionic synthetic surfactants with an HLB of 11-15 were found to lyse type 1701 and type 021N in an activated sludge sampled from a sewage treatment plant. Use of the synthetic surfactant to lyse filamentous bacteria was also demonstrated in a continuous-feed aeration tank, and settleability of sludg

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Blus, Kazimierz, and Jadwiga Bemska. "EFFECT OF NONIONIC SURFACTANTS ON THE DYEING PROCESS OF CELLULOSE FIBRES WITH C.I. REACTIVE BLUE 217." AUTEX Research Journal 10, no. 3 (2010): 64–68. http://dx.doi.org/10.1515/aut-2010-100302.

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Abstract This investigation addressed the role of nonionic surfactants on the sorption of C.I. Reactive Blue 217 by cellulose fibres, focusing on the influence of the surfactant concentration and type on the spectroscopic properties of this dye. It was found that surfactants in dyeing baths change the spectroscopic properties of dye solutions, resulting in the decomposition of aggregates and agglomerates to form a surfactant-dye complex. The surfactants in baths counteract the aggregating action of sodium chloride. The performed studies concerned the sorption kinetics of dye from dyeing baths

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