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Journal articles on the topic 'Cationic surfactant CPC'

Author: Grafiati

Published: 11 December 2022

Last updated: 31 July 2025

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1

Sakač, Nikola, Dubravka Madunić-Čačić, Dean Marković, et al. "The 1,3-Dioctadecyl-1H-imidazol-3-ium Based Potentiometric Surfactant Sensor for Detecting Cationic Surfactants in Commercial Products." Sensors 22, no. 23 (2022): 9141. http://dx.doi.org/10.3390/s22239141.

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A low-cost and fast potentiometric surfactant sensor for cationic surfactants, based on the new ion-pair 1,3-dioctadecyl-1H-imidazol-3-ium-tetraphenylborate (DODI-TPB), is presented. The new cationic surfactant DODI-Br was synthesized and characterized by NMR, LC-MS, and elemental analysis, and was used for synthesis of the DODI-TPB ionophore. The DODI-TPB surfactant sensor was obtained by implementation of the ionophore in PVC. The sensor showed excellent response characteristics with near-Nernstian slopes to the cationic surfactants DMIC, CPC, CTAB, and Hyamine 1622. The highest voltage resp

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Glumac, Nada, Milan Momčilović, Iztok Kramberger, et al. "Potentiometric Surfactant Sensor with a Pt-Doped Acid-Activated Multi-Walled Carbon Nanotube-Based Ionophore Nanocomposite." Sensors 24, no. 8 (2024): 2388. http://dx.doi.org/10.3390/s24082388.

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Two new surfactant sensors were developed by synthesizing Pt-doped acid-activated multi-walled carbon nanotubes (Pt@MWCNTs). Two different ionophores using Pt@MWCNTs, a new plasticizer, and (a) cationic surfactant 1,3-dihexadecyl-1H-benzo[d]imidazol-3-ium-DHBI (Pt@MWCNT-DHBI ionophore) and (b) anionic surfactant dodecylbenzenesulfonate-DBS (Pt@MWCNT-DBS ionophore) composites were successfully synthesized and characterized. Both surfactant sensors showed a response to anionic surfactants (dodecylsulfate (SDS) and DBS) and cationic surfactants (cetylpyridinium chloride (CPC) and hexadecyltrimeth

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3

Kishi, Kazuki, Amane Ichimura, Zhang Shuai, Yu Otsuka, Tatsuya Morozumi, and Koji Yamada. "Alginic Acid Beads Containing Fluorescent Solvatochromic Dyes Display an Emission Color Response to a Cationic Surfactant." Polymers 14, no. 21 (2022): 4649. http://dx.doi.org/10.3390/polym14214649.

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Lipophilic fluorescent dyes can be employed as sensors for surfactants present in concentrations above the critical micellar concentration (CMC) where the dyes are monodispersed in micelles. However, the surfactant concentration range over which these dyes are effective is narrowed because by the sigmoidal nature of their responses. To overcome this limitation, we developed a novel sensor material comprised of a labeled fluorescent solvatochromic dye covalently bonded to alginate gel, which is known to strongly adsorb cationic surfactants. We hypothesized that the dye-alginate conjugate would

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4

Sakač, Nikola, Dean Marković, Bojan Šarkanj, et al. "Direct Potentiometric Study of Cationic and Nonionic Surfactants in Disinfectants and Personal Care Products by New Surfactant Sensor Based on 1,3-Dihexadecyl−1H-benzo[d]imidazol−3-ium." Molecules 26, no. 5 (2021): 1366. http://dx.doi.org/10.3390/molecules26051366.

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A novel, simple, low-cost, and user-friendly potentiometric surfactant sensor based on the new 1,3-dihexadecyl−1H-benzo[d]imidazol−3-ium-tetraphenylborate (DHBI–TPB) ion-pair for the detection of cationic surfactants in personal care products and disinfectants is presented here. The new cationic surfactant DHBI-Br was successfully synthesized and characterized by nuclear magnetic resonance (NMR), Fourier transform infrared (FTIR) spectrometry, liquid chromatography–mass spectrometry (LC–MS) and elemental analysis and was further employed for DHBI–TPB ion-pair preparation. The sensor gave excel

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5

Huang, Jin-Hui, Yong Zhao, Guang-Ming Zeng, et al. "Micellar-enhanced ultrafiltration for the solubilization of various phenolic compounds with different surfactants." Water Science and Technology 72, no. 4 (2015): 623–31. http://dx.doi.org/10.2166/wst.2015.257.

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Micellar-enhanced ultrafiltration (MEUF) was applied to the separation of phenolic compounds p-nitrophenol (PNP), p-chlorophenol (PCP), p-cresol (PC) and phenol (P) from effluents using a hydrophilic polyethersulfone ultrafiltration membrane. Cationic cetylpyridinium chloride (CPC), nonionic TX-100 and anionic sodium dodecyl benzene sulfonate (SDBS) were chosen as the surfactants. Several important parameters, i.e. the separation efficiency, the distribution coefficient of phenolic compounds and the removal ratio of surfactants, were investigated. It was shown that the separation efficiency an

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Yusaf, Amnah, Muhammad Usman, Muhammad Siddiq, et al. "Mixed Micellar Solubilization of Naphthol Green B Followed by Its Removal from Synthetic Effluent by Micellar-Enhanced Ultrafiltration under Optimized Conditions." Molecules 27, no. 19 (2022): 6436. http://dx.doi.org/10.3390/molecules27196436.

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In this manuscript, the application of cetyltrimethylammonium bromide (CTAB) and cetylpyridinium chloride (CPC) for the removal of Naphthol Green B (NGB) as a synthetic effluent has been studied. The solubilization of NGB by a single and mixed micellar system using Triton X-100 (TX-100) as a nonionic surfactant has been performed to establish both the extent of the partitioning (kx) of NGB and ultimately their respective Gibbs free energies ΔGp as well. An applied methodology, micellar-enhanced ultrafiltration (MEUF), has also been studied in different micellar media of cationic surfactants by

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7

Kim, B. K., K. Baek, and J. W. Yang. "Simultaneous removal of nitrate and phosphate using cross-flow micellar-enhanced ultrafiltration (MEUF)." Water Science and Technology 50, no. 6 (2004): 227–34. http://dx.doi.org/10.2166/wst.2004.0380.

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The feasibility of cross-flow micellar-enhanced ultrafiltration (MEUF) was investigated to remove nitrate and phosphate simultaneously. At the above critical micelle concentration (CMC), a cationic surfactant added in wastewater forms micelles, which have positive charge on their surface. Anionic contaminants such as nitrate and phosphate can be bound on the micelles by electrostatic interaction, and the micelle-pollutants complex is removed effectively by ultrafiltration. In this study, a cross-flow MEUF system was designed and investigated the feasibility of MEUF for field application. A cat

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8

Aramaki, Kenji, Eriko Takimoto, and Takumi Yamaguchi. "Effect of the Cationic Head Group on Cationic Surfactant-Based Surfactant Mediated Gelation (SMG)." International Journal of Molecular Sciences 21, no. 21 (2020): 8046. http://dx.doi.org/10.3390/ijms21218046.

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The surfactant-mediated gelation (SMG) method allows us to formulate hydrogels using a water-insoluble organogelator. In this study, we formulated hydrogels using three cationic surfactants, hexadecyltrimethylammonium bromide (CTAB), hexadecyltrimethylammonium chloride (CTAC), and hexadecylpyridinium chloride (CPC)] and an organogelator (12-hydroxyoctadecanoic acid (12-HOA), and studied their structures and mechanical properties. A fiber-like structure similar to that found in the 12-HOA-based organogels was observed by optical microscopy. Small- and wide-angle X-ray scattering profiles showed

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9

Sokolova, Tatiana A., Anna A. Burmistrova, and Sergey Yu Doronin. "Analytical reactions of 2,4-dinitrophenylhydrazine with some aldehydes in micelles of cationic surfactants." Izvestiya of Saratov University. Chemistry. Biology. Ecology 23, no. 3 (2023): 262–71. http://dx.doi.org/10.18500/1816-9775-2023-23-3-262-271.

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The analytical effect of micelles of cationic surfactants in the reactions of some aromatic aldehydes (AA) with 2,4-dinitrophenylhydrazine (DNPH) with the formation of the corresponding aci-forms of hydrazones has been established. It has been established that micelles of nonionic and anionic surfactants do not cause analytically significant effects in the system under study. Analytical characteristics of systems DNPH–AA– cationic surfactant (molar absorption coefficients (ε), ranges of determined contents, limits of detection) were determined, using the example of benzaldehyde and its nitro-,

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10

Azum, Naved, Malik Abdul Rub, Sulaiman Yahya Alfaifi, and Abdullah M. Asiri. "Interaction of Diphenhydramine Hydrochloride with Cationic and Anionic Surfactants: Mixed Micellization and Binding Studies." Polymers 13, no. 8 (2021): 1214. http://dx.doi.org/10.3390/polym13081214.

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The focus of the present work is to evaluate the interactions of an anti-allergic drug (diphenhydramine hydrochloride, DPH) with anionic (sodium dodecyl sulfate, SDS) and cationic (cetylpyridinium chloride, CPC) surfactants in the aqueous medium. The mixed micellization behavior and surface properties of drug-surfactant mixtures have been examined by surface tension measurements. Various theoretical approaches were applied to explore the synergistic or non-ideal behavior of the current mixed systems. Furthermore, the binding studies of drug with surfactants have been elaborated by UV–visible s

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Sahlabadi, Fatemeh, Akbar Eslami, Nadali Alavi, Mohsen Sadani, Marzieh Torabbeigi, and Mahdokht Arshadi. "High-efficient removal of tetrabromobisphenol A from waste mobile phone printed circuit boards leached solution by micellar enhanced ultrafiltration." Environmental Health Engineering and Management 10, no. 1 (2023): 97–105. http://dx.doi.org/10.34172/ehem.2023.11.

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Background: Tetrabrombisphenol A (TBBPA) is one of the major brominated flame retardants (BFRs) used in waste mobile phone printed circuit boards (WMPPCB) that accounts for approximately 60% of the total BFR market. Methods: The potential of TBBPA removal from WMPPCB leached solution was investigated using micelle-enhanced ultrafiltration (MEUF) in the presence of cationic, anionic, and nonionic surfactants. The efficiency of several parameters including surfactant concentration, transmembrane pressure (TMP), pH, and TBBPA concentration, was evaluated to improve the MEUF. The optimal condition

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12

Ma, Jing, Hai-Lian Yang, and Wei-Hua Ren. "Functionalized Reduced Graphene Oxide Loaded Aligned Carbon Nanotube Layer Used as Counter Electrode for Dye-Sensitized Solar Cells." Journal of Nanoscience and Nanotechnology 20, no. 3 (2020): 1749–55. http://dx.doi.org/10.1166/jnn.2020.17148.

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A novel bilayer counter electrodes for Dye-sensitized Solar Cells (DSSCs) made of reduced graphene oxide (RGO) and aligned carbon nanotube (ACNT) was developed. The underlayer ACNT severs as a transition layer for RGO. The overlayer of RGO plays the role of catalytic layer. It was demonstrated that the property of graphene counter electrode was adversely affected by aggregation, by adding surfactant, the aggregation of graphene can be inhabited effectively. Moreover, the interface between the RGO and the ACNT can be optimized by surfactant functionalization of RGO. After screening, a cationic

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13

Klovak, V., L. Nechpai, S. Lelyushok, and S. Kulichenko. "FLUORESCENCE CHARACTERISTICS OF FLUORESCEIN AND EOSIN Y SOLUTIONS IN WATER-MICELLAR SURFACTANT MEDIA." Bulletin of Taras Shevchenko National University of Kyiv. Chemistry, no. 1 (57) (2020): 23–26. http://dx.doi.org/10.17721/1728-2209.2020.1(57).6.

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The effect of cationic, anionic and nonionic surfactants on the fluorescence properties of fluorescein and eosin Y aqueous solutions has been investigated. It has been found that sodium dodecyl sulfate does not affect the position of the maximum wavelengths of solutions of fluorescein and eosin Y in the study of the effect of an anionic surfactant on the fluorescence emission intensity of dyes. The intensity of the signal of the dye solutions when changing the concentration of anionic surfactant changes little. As the concentration of non-ionic surfactant increases, the fluorescence emission i

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14

Shrivas, Kamlesh, Khemchand Dewangan, and Asar Ahmed. "Surfactant-based dispersive liquid–liquid microextraction for the determination of zinc in environmental water samples using flame atomic absorption spectrometry." Analytical Methods 8, no. 27 (2016): 5519–25. http://dx.doi.org/10.1039/c6ay01277a.

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This method involved the formation of a zinc complex with 4-(2-pyridylazo) resorcinol (PAR) and subsequently SA-DLLME was applied to extract this Zn(ii)–(PAR)<sub>2</sub>·CPC complex into chloroform in the presence of cationic surfactant.

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15

Obushenko, Tetiana, Natalia Tolstopalova, Olga Kulesha, and Igor Astrelin. "Thermodynamic Studies of Bromphenol Blue Removal from Water Using Solvent Sublation." Chemistry & Chemical Technology 10, no. 4 (2016): 515–18. http://dx.doi.org/10.23939/chcht10.04.515.

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The investigation of thermodynamic peculiarities of bromphenol blue (BB) elimination from aqueous solutions using solvent sublation technique has been carried out. Thermodynamic properties of acid dye (BB) interaction with cationic surfactant cetylpyridinium chloride (CPC), applying Kharash method and HyperСube HyperСhem Professional software were studied. It was proven that dye-surfactant ion complex formation is a spontaneous process and does not require any external forces for its run.

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16

Sahihi, Mehdi, Yousef Ghayeb та Abdol-Khalegh Bordbar. "Fluorescence spectroscopic study on interaction of retinol with β-lactoglobulin in the presence of cetylpyridinium chloride". Spectroscopy 27, № 1 (2012): 27–34. http://dx.doi.org/10.1155/2012/856098.

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In our previous study thermodynamic denaturation of bovine β-lactoglobulin variant A (BLG-A), has been investigated in the presence of cetylpyridinium chloride (CPC) as a cationic surfactant. Here, the retinol binding property of BLG was determined at 298 K and pH 8.0 by spectrofluorimeter titration method, in the presence of CPC to elucidate the still unknown structure–function relationship in this protein. Comparison of the results allowed determining the binding of retinol by BLG in the presence of CPC. The two-way chemometrics method was used, to estimate the equilibrium concentration of c

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17

Al-Sada, Hiba A., and Hikmet A. Al-Gharrawi. "Effect of Addition of Cetylpyridinium Chloride Cationic Surfactant on the Antimicrobial Activity of Chlorhexidine Endodontic Irrigant." International Journal of Dentistry 2024 (April 5, 2024): 1–6. http://dx.doi.org/10.1155/2024/2449447.

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Background. Endodontic irrigants are essential for disinfecting the root canal system. None of the currently available irrigants perfume sufficiently. However, most products contain surfactants, which enhance the antimicrobial properties of the irrigants. Objectives. To evaluate the effect of cetylpyridinium chloride (CPC) surfactant on the antimicrobial activity of chlorhexidine and compare it with that of chlorhexidine (CHX) and Biopure MTAD against Enterococcus faecalis, Staphylococcus aureus, and Candida albicans. Materials and Methods. In this in vitro study, three microorganisms were use

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Barna, Gyöngyi, Tünde Csatári, Réka Balázs, et al. "Water regime change of surfactant polluted soils." Review on Agriculture and Rural Development 5, no. 1-2 (2016): 126–31. http://dx.doi.org/10.14232/rard.2016.1-2.126-131.

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Studies were made on the adsorption of a cationic surfactant, hexadecylpyridinium-chloride (CPC), on various soils and sediments. The aim was to determine how modify the adsorbed surfactant the soil physical characteristics, mainly water regime. Water retention were measured, pore size distribution curves were derived from water retention curves, modal suction, total porosity and rate of different pores (macro-, meso-, micro-, ultramicro- and cryptopores) were evaluated. Due to CPC treatment, samples became hydrophobic. Rate of cryptopores declined at all surfactant treated samples, while rate

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19

Saha, Bidyut, Monirul Islam, and Asim K. Das. "Kinetics and Mechanism of 2,2′-bipyridine Catalysed Chromium(VI) Oxidation of Dimethyl Sulfoxide in the Presence and Absence of Surfactants†." Journal of Chemical Research 2005, no. 7 (2005): 471–74. http://dx.doi.org/10.3184/030823405774309050.

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In the 2,2′-bipyridine (bipy) catalysed CrVI oxidation of dimethyl sulfoxide (DMSO) to dimethyl sulfone, the CrVI–bipy complex formed at the pre - equilibrium step undergoes a nucleophilic attack by the S or O of DMSO to form a positively charged reactive intermediate. This intermediate experiences an oxygen transfer or a ligand coupling to give the products. The anionic surfactant (SDS) accelerates the process while the cationic surfactant (CPC) retards the reaction.

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Alamri, Ali, Ali Alqahtani, Taha Alqahtani, et al. "Design, Physical Characterizations, and Biocompatibility of Cationic Solid Lipid Nanoparticles in HCT-116 and 16-HBE Cells: A Preliminary Study." Molecules 28, no. 4 (2023): 1711. http://dx.doi.org/10.3390/molecules28041711.

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In this study, pEGFP-LUC was used as a model plasmid and three distinct cationic lipids (dioleyloxy-propyl-trimethylammonium chloride [DOTMA], dioleoyl trimethylammonium propane [DOTAP], and cetylpyridinium chloride [CPC]) were tested along with PEG 5000, as a nonionic surfactant, to prepare glyceryl monostearate (GMS)-based cationic solid lipid nanoparticles (cSLNs). Both the type and quantity of surfactant had an impact on the physicochemical characteristics of the cSLNs. Thermal analysis of the greater part of the endothermic peaks of the cSLNs revealed they were noticeably different from t

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Korzhan, L., S. Kulichenko, and S. Lelyushok. "Smart Colorimetric Determination of Ionic Surfactants with Bromothymol Blue at the Presence of Nonionic Surfactant Triton X-100." Methods and Objects of Chemical Analysis 18, no. 3 (2023): 136–42. http://dx.doi.org/10.17721/moca.2023.136-142.

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The application of digital colorimetry for the determination of ionic surfactants, moderately hydrophobic medicinal substances of ionic nature in the system with bromothymol blue (BTB) in aqueous solutions using a smartphone has been shown. The influence of the solution nonionic surfactant Triton X-100 (TX-100) on the parameters of the colorimetric determination of bromothymol blue has been studied. It was established that the addition of TX-100 improves the linearity of the graduation dependence of the colorimetric signal of bromothymol blue (r ˃ 0.99) and reduces the detection limit of the d

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22

Yadav, Chandradip Kumar, Majoj Kumar Adhikari, Jasana Maharjan, and Ajaya Bhattarai. "An analysis of cetylpyridinium chloride (CPC) by FESEM, EDX methods, and its applications." Rajarshi Janak University Research Journal 2, no. 1-2 (2024): 1–7. https://doi.org/10.3126/rjurj.v2i1-2.72263.

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Cetylpyridinium chloride (CPC) is a potential cationic surfactant with cleansing and antimicrobial properties. Apart from its use as an emulsifying and cleansing agent, it is used in cosmetics, industrial processes, pharmaceuticals, food additives, etc. In the present study, the purity of cetylpyridinium chloride (CPC) was determined using FE-SEM and EDX methods. The FE-SEM test showed CPC sizes from 46.35μm to 77.76μm. The result and analysis of EDX depicted the purity of the sample. The percentage of elements present in cetylpyridinium chloride has been explained by EDX data. The percentages

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Štěpánková, Sandra, Ondřej Kozák, and Radek Zbořil. "Surfactant-Based Fluorescent Quantum Carbon Dots: Synthesis and Application." Advanced Materials Research 1088 (February 2015): 381–85. http://dx.doi.org/10.4028/www.scientific.net/amr.1088.381.

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In this work I present fluorescent carbon dots (CDs) prepared by facile and inexpensive synthesis by hydrothermal carbonization from cationic surfactant cetylpyridinium chloride (CPC). These CDs show tunable photoluminescence as well as long-term colloidal stability. Moreover, CDs exhibit high selectivity and sensitivity towards Fe3+ions. Therefore a specific quantitative method is proposed for the determination of Fe3+ions based on fluorescence quenching of CDs.

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Tripathi, A. N., S. ehikhalikar, and K. S. Patel. "Flow injection analysis of iron in rain water with thiocyanate and surfactant." Journal of Automatic Chemistry 19, no. 2 (1997): 45–50. http://dx.doi.org/10.1155/s1463924697000072.

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This paper explains a new procedure for flow injection analysis (FIA) determination of iron in rain water based on the colour reaction of Fe3+with thiocyanate ions in the presence of the cationic surfactant cetylpyridinium chloride (CPC). The value of apparent molar absorptivity of the complex in terms of iron is (2.00) x 104l mole-1cm-1at an absorption maximum of 490 nm. The detection limit of the method is 8 ppb Fe. The sample throughput is 90 samples/h at a flow rate of 4.0 ml/min. The reaction mechanism, optimization of FIA variables, and effect of various types of surfactant are described

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Qiu, Xuchun, Lei Liu, Wei Xu, et al. "Zeolitic Imidazolate Framework-8 Nanoparticles Exhibit More Severe Toxicity to the Embryo/Larvae of Zebrafish (Danio rerio) When Co-Exposed with Cetylpyridinium Chloride." Antioxidants 11, no. 5 (2022): 945. http://dx.doi.org/10.3390/antiox11050945.

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The combined application of nanoparticles and surfactants has attracted tremendous attention in basic research and industry. However, knowledge of their combined toxicity remains scarce. In this study, we exposed zebrafish embryos to cetylpyridinium chloride (CPC, a cationic surfactant, at 0 and 20 μg/L), zeolitic imidazolate framework nanoparticles (ZIF-NPs, at 0, 30, and 60 mg/L), and their mixtures until 120 h post-fertilization (hpf). Within the used concentration range, both single and combined exposures exhibited limited effects on the survival and hatching of zebrafish. However, the com

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Kullavadee, Karn Orachai, Ruktanonchai Uracha, and Siwaporn Meejoo Smith. "Effect of Surfactant on Characteristics of Solid Lipid Nanoparticles (SLN)." Advanced Materials Research 364 (October 2011): 313–16. http://dx.doi.org/10.4028/www.scientific.net/amr.364.313.

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SLN have shown a great promise as an alternative drug carrier for intravenous and dermal applications. This work focuses on the basic properties of drug-free Compritol® ATO 888 based SLN systems by using cationic surfactant (CPC) and nonionic surfactant (Tween 80). Effects of surfactant on the physical properties of SLNs were investigated in the absence of model drug to avoid the interaction between drug and surfactant. These SLN samples have different particle size, zeta potential and morphology. DSC was used to quantify the crystallinity of SLN systems. It was found that %RI of both SLNs was

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Sakač, Nikola, Dubravka Madunić-Čačić, Dean Marković, et al. "Potentiometric Surfactant Sensor Based on 1,3-Dihexadecyl-1H-benzo[d]imidazol-3-ium for Anionic Surfactants in Detergents and Household Care Products." Molecules 26, no. 12 (2021): 3627. http://dx.doi.org/10.3390/molecules26123627.

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A 1,3-dihexadecyl-1H-benzo[d]imidazol-3-ium-tetraphenylborate (DHBI-TPB) ion-pair implemented in DHBI-TPB surfactant sensor was used for the potentiometric quantification of anionic surfactants in detergents and commercial household care products. The DHBI-TPB ion-pair was characterized by FTIR spectroscopy and computational analysis which revealed a crucial contribution of the C–H∙∙∙π contacts for the optimal complex formation. The DHBI-TPB sensor potentiometric response showed excellent analytical properties and Nernstian slope for SDS (60.1 mV/decade) with LOD 3.2 × 10−7 M; and DBS (58.4 mV

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Srikacha, Nikom, Manop Sriuttha, Lamyai Neeratanaphan, Chatree Saiyasombat, and Bundit Tengjaroensakul. "The Improvement of Natural Thai Bentonite Modified with Cationic Surfactants on Hexavalent Chromium Adsorption from an Aqueous Solution." Adsorption Science & Technology 2022 (May 21, 2022): 1–15. http://dx.doi.org/10.1155/2022/4444164.

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This work was performed to evaluate the adsorption properties of modified Thai bentonites (MTBs) on hexavalent chromium (Cr(VI)) by using a popularly capable surfactant (hexadecyltrimethylammonium bromide (HDTMA)) compared to an alternative surfactant (cetylpyridinium chloride (CPC)). The adsorption properties of the surfactant load, adsorbent weight, contact time, initial Cr(VI) concentration, and temperature of the MTBs were evaluated. The results revealed that a higher surfactant load significantly affected the Cr(VI) adsorption, and the equilibrium adsorption was achieved at 60 min. The ad

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Monirul, Islam. "Kinetics and mechanism of hetero-aromatic N-base ligand 1,10-phenanthroline assisted chromic acid oxidation of DL-malic acid in aqueous micellar acid media." Journal of Indian Chemical Society Vol. 96, Oct 2019 (2019): 1333–42. https://doi.org/10.5281/zenodo.5642633.

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Department of Chemistry, Seth Anandram Jaipuria College, Kolkata-700 005, India <em>E-mail</em>: monirul_vu@yahoo.co.in, michem989@gmail.com <em>Manuscript received online 18 September 2019, accepted 24 September 2019</em> Hetero-aromatic N-base ligand like 1,10-phenanthroline (phen) assisted chromic acid oxidation of malic acid in aqueous sulfuric acid media have been studied under the experimental conditions, [malic acid]<sub>T</sub> >> [Cr(VI)<sub>T</sub> ] at different temperatures. Under the kinetic conditions, HCrO<sub>4</sub><sup>–</sup> has been found kinetically active in

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Yadav, Chandradip Kumar, Vivek Subedi, Monami Mukherjee, et al. "Wetting behaviour of mixed surfactants on the mild steel surface." E3S Web of Conferences 610 (2025): 04003. https://doi.org/10.1051/e3sconf/202561004003.

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Interfacial phenomena such as wetting can be enhanced to a greater extent and mixed surfactant systems are promising candidates for the improvement of wettability of hydrophobic surfaces. In this study, the investigation sought to examine the surface-wetting characteristics of mild steel utilizing a blend of the cationic surfactant cetylpyridinium chloride (CPC) and the anionic surfactant sodium dodecyl sulfate (SDS). The wetting behaviour of mild steel surface is quantified in terms of contact angle corresponding to H2SO4, mixed surfactant acid solutions, and methanol for three hours. The con

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Ganeshnarayan, Krishnaraj, Suhagi M. Shah, Matthew R. Libera, Anthony Santostefano, and Jeffrey B. Kaplan. "Poly-N-Acetylglucosamine Matrix Polysaccharide Impedes Fluid Convection and Transport of the Cationic Surfactant Cetylpyridinium Chloride through Bacterial Biofilms." Applied and Environmental Microbiology 75, no. 5 (2008): 1308–14. http://dx.doi.org/10.1128/aem.01900-08.

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ABSTRACT Biofilms are composed of bacterial cells encased in a self-synthesized, extracellular polymeric matrix. Poly-β(1,6)-N-acetyl-d-glucosamine (PNAG) is a major biofilm matrix component in phylogenetically diverse bacteria. In this study we investigated the physical and chemical properties of the PNAG matrix in biofilms produced in vitro by the gram-negative porcine respiratory pathogen Actinobacillus pleuropneumoniae and the gram-positive device-associated pathogen Staphylococcus epidermidis. The effect of PNAG on bulk fluid flow was determined by measuring the rate of fluid convection t

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Żamojć, Krzysztof, Dariusz Wyrzykowski, and Lech Chmurzyński. "On the Effect of pH, Temperature, and Surfactant Structure on Bovine Serum Albumin–Cationic/Anionic/Nonionic Surfactants Interactions in Cacodylate Buffer–Fluorescence Quenching Studies Supported by UV Spectrophotometry and CD Spectroscopy." International Journal of Molecular Sciences 23, no. 1 (2021): 41. http://dx.doi.org/10.3390/ijms23010041.

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Due to the fact that surfactant molecules are known to alter the structure (and consequently the function) of a protein, protein–surfactant interactions are very important in the biological, pharmaceutical, and cosmetic industries. Although there are numerous studies on the interactions of albumins with surfactants, the investigations are often performed at fixed environmental conditions and limited to separate surface-active agents and consequently do not present an appropriate comparison between their different types and structures. In the present paper, the interactions between selected cat

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Deese, Rachel D., Madeline R. LeBlanc, and Robert L. Cook. "Surfactant toxicity to Artemia franciscana and the influence of humic acid and chemical composition." Environmental Chemistry 13, no. 3 (2016): 507. http://dx.doi.org/10.1071/en15108.

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Environmental context Surfactants, a pollutant class routinely introduced into aquatic environments, can be toxic to a variety of species. It is thus important to understand how surfactants’ toxicity is influenced by their interactions with other environmental constituents, including natural organic matter. We report the changes in toxicity of three surfactants to brine shrimp in the presence of unmodified and chemically modified humic acids. Abstract Surfactants can be extremely toxic to aquatic species and are introduced to the environment in a variety of ways. It is thus important to unders

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Lee, Byung Hwan. "Effects of Various Alcohols and Salts on the Mixed Micellization of Cationic Surfactant (CPC) with Nonionic Surfactant (TX-100)." Colloid and Interface Science Communications 19 (July 2017): 1–4. http://dx.doi.org/10.1016/j.colcom.2017.05.001.

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Rehman, Abdul, Muhammad Usman, Tanveer Hussain Bokhari, et al. "Effects of nonionic surfactant (TX-100) on solubilizing power of cationic surfactants (CTAB and CPC) for Direct Red 13." Colloids and Surfaces A: Physicochemical and Engineering Aspects 586 (February 2020): 124241. http://dx.doi.org/10.1016/j.colsurfa.2019.124241.

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Tonova, K., Z. Lazarova, N. Nemestothy, L. Gubicza, and K. Belafi-Bako. "Lipase-catalyzed esterification in a reversed micellar reaction system." Chemical Industry and Chemical Engineering Quarterly 12, no. 3 (2006): 175–80. http://dx.doi.org/10.2298/ciceq0603175t.

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In this work, the lipase-catalyzed synthesis of i-amyl oleate was performed in a reversed micellar system of a cationic surfactant, CPC. The influence of the RM-system constituents on the biocatalysis characteristics (initial esterification rate and conversion extent) was studied and discussed in terms of the RM-structure. The initial water content in the RM-system (the water to surfactant mole ratio, Wo), affected both reaction parameters in a bell-shaped manner, with the maximum depending on the alcohol amount. In general the optimal Wo-values remained between 34 ?40 for a wide range of the

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Ibrahim, Shariff, Is Fatimah, Ha-Ming Ang, and Shaobin Wang. "Adsorption of anionic dyes in aqueous solution using chemically modified barley straw." Water Science and Technology 62, no. 5 (2010): 1177–82. http://dx.doi.org/10.2166/wst.2010.388.

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An agricultural waste derived adsorbent was prepared by chemically modified barley straw with NaOH and a cationic surfactant hexadecylpyridinium chloride monohydrate (CPC). The prepared adsorbent, BMBS, was used for removal of anionic dyes; Acid Blue (AB40) and Reactive Blue 4 (RB4) from aqueous solution in a batch adsorption system. The adsorbent was characterized by FT-IR and elemental composition. The stability of CPC adsorbed on straw surface was also evaluated by exposing to aqueous solution. In adsorption tests, influence of operation parameters such as contact time, initial concentratio

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Aseeri, Jumaa, Naser M. Alandis, Waffa Mekhamer, and Manawwer Alam. "Miscibility studies of polystyrene/polyvinyl chloride blend in presence of organoclay." Open Chemistry 17, no. 1 (2019): 927–35. http://dx.doi.org/10.1515/chem-2019-0095.

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AbstractPolystyrene (PS)/ polyvinyl chloride (PVC) blends of different compositions, with and without organoclay (OC) were prepared by a solution casting method. PS and PVC were combined in ratios of 100/0, 90/10, 10/90, and 0/100. Local clay was treated with 0.5M NaCl to generate sodium clay (Na-clay). The Na-clay was subsequently modified using the cationic surfactant, cetylpyridinium chloride (CPC), at a concentration of 0.5 times that of Na-clay. The CPC-modified clay was denoted as organoclay (OC). The organoclay was dispersed in PS/PVC blends (90/10 and 10/90) with different weight perce

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Brijesh, Pare, Ayachit Manisha, and B. Jonnalagadda S. "Cetyl pyridinium chloride catalysed reaction of acridine yellow with acidic chloramine-T." Journal of Indian Chemical Society Vol. 86, Jun 2009 (2009): 582–87. https://doi.org/10.5281/zenodo.5811735.

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Post Graduate Department of Chemistry, Madhav Science College (Vikram University), Ujjain-456 010, Madhya Pradesh, India <em>E-mail</em>: brijesh_pare@hotmail.com University of KwaZula-Natal, Durban. South Africa <em>Manuscript received 11 October 2007, revised 17 October 2008, accepted 19 December 2008</em> The kinetics and mechanism of the uncatalyzed and cetyl pyridinium chloride (CPC) catalyzed oxidation of acridine yellow (3,6-diamino-2,7-dimethyl acridine hydrochloride) dye by chloramine-T in acidic media has been studied spectrophotometrically. With excess concentrations of other reacta

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Gajdošová, Andrea, Petya Racheva, Denitsa Kiradzhiyska, et al. "Centrifuge-Less Mixed Micelle-Mediated Cloud Point Extraction-Spectrophotometric Determination of Vanadium Using 4-Nitrocatechol and Cetylpyridinium Chloride." International Journal of Molecular Sciences 26, no. 12 (2025): 5808. https://doi.org/10.3390/ijms26125808.

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A novel, environmentally friendly cloud point extraction (CPE) method based on 4-nitrocatechol (H2L) was developed in this study to spectrophotometrically determine trace vanadium. This method utilizes a mixed micelle-mediated system comprising a cationic surfactant (cetylpyridinium chloride, CPC) and a nonionic surfactant (Triton X-114). In contrast to conventional CPE, the present approach does not employ centrifugation to separate the two phases. The distinguishing characteristic of the extracted species, (CP+)[VVOL2], is its ability to absorb light across the entire visible spectrum. The m

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Robertson, Cameron, Sayoni Batabyal, Darren Whitworth, et al. "Modelling of Cetylpyridinium Chloride Availability in Complex Mixtures for the Prediction of Anti-Microbial Activity Using Diffusion Ordered Spectroscopy, Saturation Transfer Difference and 1D NMR." Pharmaceuticals 17, no. 12 (2024): 1570. http://dx.doi.org/10.3390/ph17121570.

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Background/Objectives: A range of NMR techniques, including diffusion ordered spectroscopy (DOSY) were used to characterise complex micelles formed by the anti-microbial cationic surfactant cetylpyridium chloride and to quantify the degree of interaction between cetylpyridium chloride and hydroxyethyl cellulose in a variety of commercially relevant formulations as a model for the disk retention assay. Methods: This NMR-derived binding information was then compared with the results of formulation analysis by traditional disk retention assay (DRA) and anti-microbial activity assays to assess the

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Howyan, Nashwa A., Layla A. Al Juhaiman, Waffa K. Mekhamer, and Hissah H. Altilasi. "Comparative Study of Protection Efficiency of C-Steel Using Polystyrene Clay Nanocomposite Coating Prepared from Commercial Indian Clay and Local Khulays Clay." Metals 13, no. 5 (2023): 879. http://dx.doi.org/10.3390/met13050879.

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This work aimed to compare the coating protection efficiency of C-steel using two kinds of clay: a local Khulays clay (RCKh) from Saudi Arabia and a commercial clay (CCIn) from India. Clay-based polymer nanocomposites have a unique layered structure, rich intercalation chemistry, and availability at low cost. They are promising reinforcements for polymers. The raw clay for both clay types was washed before being treated with NaCl to produce sodium clay (NaC). The cationic surfactant cetylpyridinium chloride (CPC) was then used to convert the NaC into the organoclay (OC) form. Polystyrene/organ

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Andrunik, Magdalena, and Tomasz Bajda. "Modification of Bentonite with Cationic and Nonionic Surfactants: Structural and Textural Features." Materials 12, no. 22 (2019): 3772. http://dx.doi.org/10.3390/ma12223772.

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Surfactant-modified clay minerals are known for their good sorption properties of both organic and inorganic compounds from aqueous solutions. However, the current knowledge regarding the effect of both cationic and nonionic surfactants on the properties of bentonite is still insufficient. Bentonite, with montmorillonite as the base clay, was modified with hexadecethyltrimethylammonium bromide (a cationic surfactant) in the amount of 1.0 cation exchange capacity (CEC) of bentonite and varying concentrations of t-octylphenoxypolyethoxyethanol (Triton X-100, a nonionic surfactant). We aimed to i

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Rooj, Bipin, Anup Pramanik, and Ujjwal Mandal. "Formation of vesicles between negatively charged carbon quantum dots and cationic surfactant cetylpyridinium chloride (CPC) due to oxidative photo induced electron transfer." Journal of Molecular Liquids 393 (January 2024): 123632. http://dx.doi.org/10.1016/j.molliq.2023.123632.

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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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Gamoudi, S., N. Frini-Srasra, and E. Srasra. "Solid-state intercalation of cationic surfactants into Tunisian smectites." Clay Minerals 48, no. 4 (2013): 583–93. http://dx.doi.org/10.1180/claymin.2013.048.5.02.

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AbstractIntercalation of cationic surfactants hexadecylpyridinium (HDPy+) and hexadecyltrimethylammonium (HDTMA+) into the interlayer space of homoionic (Na-, Ca- and Zn-) smectites by solid-solid reactions was investigated. These reactions were complete within 15 min. Changes in the surface and structure of the smectites modified with different surfactants were characterized using XRD, FTIR and DSC. The intercalation of surfactant is controlled by the exchangeable cation of smectite and monofunctional ammonium cation type. HDPy+ and HDTMA+ surfactants were retained by Zn-exchanged smectite, s

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Zhang, Zhang, Wang, et al. "A Novel Adsorbent Albite Modified with Cetylpyridinium Chloride for Efficient Removal of Zearalenone." Toxins 11, no. 11 (2019): 674. http://dx.doi.org/10.3390/toxins11110674.

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Zearalenone (ZEN) is a non-steroidal estrogenic mycotoxin and constitutes a potential health threat to humans and livestock. This study aimed to explore the potential of albite modified by the cationic surfactant cetylpyridinium chloride (CPC) as ZEN adsorbent. The organoalbite (OA) was characterized by SEM analysis, XRD analysis, FTIR spectroscopy, thermal analysis, and BET gas sorption measurement. In vitro adsorption of ZEN by OA was carried out by simulating the pH conditions of the gastrointestinal tract. The characterization results showed that the surface of OA changed from hydrophilic

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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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Shapovalov, Serghey, Vadim Ponomariov, Oryna Mosharenkova, and Sophia Butenko. "Studies of the Association of Dyes with Surfactants in Aqueous Solutions: Spectrophotometry and Computer Simulation." French-Ukrainian Journal of Chemistry 7, no. 2 (2019): 9–19. http://dx.doi.org/10.17721/fujcv7i2p9-19.

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The association of cationic dye (pinacyanol, PC) with anionic dyes (ethyleosin, EE, or rhodamine 200 C, R200C), and also the interaction “dye+surfactant” has been investigated in aqueous solutions by visible spectroscopy and computer simulation. Cetylpyridinium bromide (CPB), sodium dodecylsulfate (SDS) and triton X-100 (TX) were used as cationic, anionic and non-ionic surfactants respectively. The formation of “dye+surfactant” associates takes place at low dye concentrations (≥10‑6 M) and concentrations of surfactant, which are much smaller than the critical micelle concentrations (CMC). In c

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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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