Gotowe bibliografie tematyczne / PEG-Based surfactants

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Gotowa bibliografia na temat „PEG-Based surfactants”

Autor: Grafiati

Data publikacji: 24 maja 2025

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Artykuły w czasopismach na temat "PEG-Based surfactants"

Wagner, Olaf, Julian Thiele, Marie Weinhart, Linas Mazutis, David A. Weitz, Wilhelm T. S. Huck i Rainer Haag. "Biocompatible fluorinated polyglycerols for droplet microfluidics as an alternative to PEG-based copolymer surfactants". Lab on a Chip 16, nr 1 (2016): 65–69. http://dx.doi.org/10.1039/c5lc00823a.

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Polyglycerol-based triblock surfactants with tailored side-chain composition are exemplified in cell encapsulation and in vitro gene expression studies in droplet-based microfluidics as alternative to PEG-based surfactants.

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Lee, Jungno. "An Investigation of the Surfactants and Preservative Ingredients used in Korean Fundamental Cosmetics from 2020-2022". Korea Industrial Technology Convergence Society 27, nr 3 (30.09.2022): 73–79. http://dx.doi.org/10.29279/jitr.2022.27.3.73.

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Surfactants and preservative ingredients have a dominant effect on the safety of cosmetics. This study investigated the main surfactants and preservative ingredients in Korean fundamental cosmetics sold within the past three years. Oil-in-water (O/W) emulsifiers have been mainly polyethylene glycol (PEG)-free surfactants; however, the main solubilizing agents have remained PEG-based. Paraben, which was the main preservative ingredient, has been replaced by 1,2-hexanediol and ethylhexylglycerin. These technical safety advances concerning surfactants and preservative ingredients have made Korean cosmetics one of the safest in the world.

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Hayat, Muhammad Dilawer, i Peng Cao. "Development of PEG/PMMA Based Binders for Ti-Metal Injection Moulding". Key Engineering Materials 704 (sierpień 2016): 130–38. http://dx.doi.org/10.4028/www.scientific.net/kem.704.130.

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As the world is moving towards green manufacturing, there is an increasing demand for the use of clean and environmentally friendly binder systems in metal injection moulding (MIM) industry. One example of these developed binders is polyethylene glycol (PEG) - polymethyl methacrylate (PMMA) based system. We have systematically evaluated and optimized this binder system, and reported some interesting new results. In this article, we reported the effect of PEG molecular weight on rheological properties of the feedstock and its water debinding behaviour. We also investigated the effects of different surfactants on MIM feedstock rheological and mechanical properties, and identified a potential surfactant that enhances compatibility between the binder components and metal powders. Furthermore, we reported an interesting problem – ‘voids formation’, which is associated with PEG crystallization. To minimize this void formation a crystallization inhibitor is incorporated in the PEG/PMMA system, thereby eliminating the void formation while maintaining the clean nature of this system. This paper is concluded with some new thoughts with regard to binder design.

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Maeda, Tomoki, Midori Kitagawa, Atsushi Hotta i Satoshi Koizumi. "Thermo-Responsive Nanocomposite Hydrogels Based on PEG-b-PLGA Diblock Copolymer and Laponite". Polymers 11, nr 2 (2.02.2019): 250. http://dx.doi.org/10.3390/polym11020250.

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Poly(ethylene glycol)-b-poly(d,l-lactide-co-glycolide) (PEG-b-PLGA) diblock copolymers are widely known as polymeric surfactants for biomedical applications, and exhibit high solubility in water compared to PLGA-b-PEG-b-PLGA triblock copolymers known as gelation agents. In order to overcome the difficulties in the preparation of thermo-responsive hydrogels based on PLGA-b-PEG-b-PLGA due to the low solubility in water, the fabrication of thermo-responsive hydrogels based on PEG-b-PLGA with high solubility in water was attempted by adding laponite to the PEG-b-PLGA solution. In detail, PEG-b-PLGA with high solubility in water (i.e., high PEG/PLGA ratio) were synthesized. Then, the nanocomposite solution based on PEG-b-PLGA and laponite (laponite/PEG-b-PLGA nanocomposite) was fabricated by mixing the PEG-b-PLGA solutions and the laponite suspensions. By using the test tube inversion method and dynamic mechanical analysis (DMA), it was found that thermo-responsive hydrogels could be obtained by using PEG-b-PLGA, generally known as polymeric surfactants, and that the gelation temperature was around the physiological temperature and could be regulated by changing the solution composition. Furthermore, from the structural analysis by small angle neutron scattering (SANS), PEG-b-PLGA was confirmed to be on the surface of the laponite platelets, and the thermosensitive PEG-b-PLGA on the laponite surface could trigger the thermo-responsive connection of the preformed laponite network.

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Vadapalli, Ratna Sree, i Sunitha Reddy, M. "Formulation and Evaluation of Self-Micro Emulsifying Drug Delivery System (SMEDDS) of Ticagrelor". Saudi Journal of Medical and Pharmaceutical Sciences 8, nr 11 (2.11.2022): 628–43. http://dx.doi.org/10.36348/sjmps.2022.v08i11.001.

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The present work mainly emphasized on the enhancement of solubility of Ticagrelor by developing Self- Micro emulsifying drug delivery system. Ticagrelor is a BCS class IV drug with poor aqueous solubility and permeability. The saturated solubility of Ticagrelor in various oils, surfactants and co-surfactants was determined by using UV-spectroscopy. The excipients were selected based on their maximum solubility and compatibility for Ticagrelor. SMEDDS formulations od Ticagrelor were developed using different oils, surfactants and co-surfactant combinations (4:1 and 3:1). Pseudo ternary phase diagrams were constructed and based on pseudo ternary phase diagrams, Nano emulsification area was evaluated .Formulations were designed based on the pseudo ternary phase diagram using various proportions of oil (Capmul MCM E8 EP), surfactant (Labrasol), co-surfactant (PEG-400). The prepared formulations were selected among them F1 was optimized and carried out for further evaluations like dispersibility test, self-emulsification time ,phase separation and stability test, thermodynamic stability studies, droplet size and zeta potential, invitro drug release studies. The results of present study demonstrate that Ticagrelor SMEDDS can be used as a potential means for improving the solubility of Ticagrelor.

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Dairaku, Sachiko, Wataru Horie i Yukari Sakazaki. "Developing High Performance Sunscreen Products without PEG-based Surfactants". Journal of Society of Cosmetic Chemists of Japan 50, nr 4 (2017): 314–20. http://dx.doi.org/10.5107/sccj.50.314.

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Shokuhfar, Ali, S. Alibeigi, Mohammad Reza Vaezi i Sayed Khatiboleslam Sadrnezhaad. "Synthesis of Fe₃O₄ Nanoparticles Prepared by Various Surfactants and Studying their Characterizations". Defect and Diffusion Forum 273-276 (luty 2008): 22–27. http://dx.doi.org/10.4028/www.scientific.net/ddf.273-276.22.

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Magnetite (Fe3O4) nanoparticles were prepared simply by the reverse co-precipitation method from the solution of ferrous/ferric mixed salt in the presence of cationic surfactant (cetyl trimethyl ammonium bromide, CTAB) and nonionic surfactant (Polyethylene glycol, PEG) in two concentrations. Meanwhile, Fe3O4 nanoparticles without surfactant are also synthesized under the same condition for comparison. In addition via the reverse co-precipitation method, the pH which is an important factor in synthesis of magnetite was controlled at high values easily. The experimental results reveal that addition of surfactants affected on the size and morphology of the nanoparticles based on the X-ray diffraction (XRD) and scanning electron microscope (SEM) characterizations.

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Scanga, Randall, Lucie Chrastecka, Ridhwan Mohammad, Austin Meadows, Phenix-Lan Quan i Eric Brouzes. "Correction: Click chemistry approaches to expand the repertoire of PEG-based fluorinated surfactants for droplet microfluidics". RSC Advances 9, nr 1 (2019): 255–56. http://dx.doi.org/10.1039/c8ra90097c.

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Zhang, Mingyu, i Guangyan Zhang. "Recent Advances in the Properties and Applications of Polyglycerol Fatty Acid Esters". Polymers 17, nr 7 (25.03.2025): 879. https://doi.org/10.3390/polym17070879.

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Although polyethylene glycol (PEG)-based surfactants are widely used in various industries due to their wide range of hydrophile–lipophile balance (HLB) values, their possible by-product, 1,4-dioxane, has been listed as a reasonably anticipated human carcinogen, which may limit their applications in fields closely related to the human body. Polyglycerol fatty acid esters (PGFEs), a class of surfactants based on polyglycerol (another polyether), also have a wide range of HLB values that can be adjust by varying the degree of polymerization of the polyglycerol, the length of the fatty acid carbon chain, or the degree of esterification, but do not have the risks caused by 1,4-dioxane. In addition, all the raw materials (glycerol and fatty acids) required for the preparation of PGFEs can be obtained via hydrolysis of renewable vegetable oils. Therefore, PGFEs, as new eco-friendly and biodegradable non-ionic surfactants, have been proposed as potential green alternatives to PEG-based non-ionic surfactants. This review summarizes the properties of PGFEs specifically including their HLB, surface properties, phase behaviors, stabilizing effect on foams and emulsions, and stability, and highlights their potential applications in food, cosmetics, and pharmaceuticals observed in the last decade.

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Kubiak, Adam, Zuzanna Bielan, Aleksandra Bartkowiak, Elżbieta Gabała, Adam Piasecki, Maciej Zalas, Anna Zielińska-Jurek, Marcin Janczarek, Katarzyna Siwińska-Ciesielczyk i Teofil Jesionowski. "Synthesis of Titanium Dioxide via Surfactant-Assisted Microwave Method for Photocatalytic and Dye-Sensitized Solar Cells Applications". Catalysts 10, nr 5 (23.05.2020): 586. http://dx.doi.org/10.3390/catal10050586.

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In this study, titania nanoparticles were obtained using the microwave-assisted technique. Moreover, different surfactants (PEG (Mn = 400), Pluronic P123 and Triton X−100) were used during the synthesis in order to determine their impact on the crystallinity and morphology of the final products. Subsequently, techniques such as XRD, SEM and TEM (performed in high contrast and high-resolution mode), diffuse reflectance spectroscopy (DRS), low temperature N2 sorption (BET model), FTIR and TGA were carried out. Based on the crystallinity analysis of the obtained materials, it was established that the addition of surfactants results in greater (PEG and Triton X−100) or smaller (Pluronic P123) average crystallite size. The main purpose of this study was to use the synthesized nanomaterials in the photodegradation process (in the UV light range) of the model organic pollutants – phenol (20 mg/L) and etodolac (15 mg/L). Furthermore, it was also pointed out that the dye-sensitized solar cells can be a second application for the synthesized titania nanomaterials. The photo-oxidation and photovoltaic tests have shown that the titanium dioxide obtained using the surfactant-assisted microwave method is characterized not only by better photodegradation efficiency of phenol and etodolac, but also by higher photocurrent density compared to the reference titania samples—the pristine TiO2 and commercial P25.

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Rozprawy doktorskie na temat "PEG-Based surfactants"

Lu, Yaowei. "Multicompartmental lipid-based Janus nanoparticles : influence of different amphiphilic starting materials on their formation mechanisms and their suitability as drug delivery vehicles". Electronic Thesis or Diss., université Paris-Saclay, 2025. http://www.theses.fr/2025UPASQ009.

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Les nanoparticules Janus (JNP) asymétriques innovantes à base de lipides développées à l'Institut Galien peuvent servir de nouveaux vecteurs de délivrance de médicaments ou de transporteur d'agents diagnostiques dans le domaine des nanotechnologies. Pour obtenir ce type de particules anisotropes, différentes matières premières (phospholipides et tensioactifs à base de PEG courts ou dérivés amphiphiles de cyclodextrines) et méthodes de préparation (homogénéisation haute pression à chaud ou nanoprécipitation) ont été comparées. Ensuite, nous avons essayé d'optimiser ces JNP, en termes à la fois de connaissance sur l'influence des phospholipides et de la composition de la phase aqueuse. La relation entre la morphologie des JNP et la nature des phospholipides a été établie notamment en considérant le paramètre d'empilement de ces derniers. Des informations complémentaires ont pu être obtenues par l'étude de l'interaction entre les phospholipides et les tensioactifs à PEG courts constitutifs des JNP.L'encapsulation de deux substances actives modèles, ayant des solubilités opposées, a ensuite été évaluée et comparée à d'autres nanodispersions lipidiques comme les liposomes. La libération de ces molécules modèles a également été suivie et modélisée. Enfin, le dernier objectif a été d'explorer la toxicité aiguë des JNP sur des larves de poissons zèbre. Notamment, les images de microscopie à fluorescence ont montré que la biodistribution des nanoparticules est très cohérente avec la nanotoxicité et les malformations identifiées chez les larves.Ce projet confirme que les assemblages supramoléculaires asymétriques sont des candidats prometteurs pour la co-encapsulation d'ingrédients pharmaceutiques actifs hydrophiles et hydrophobes
The innovative asymmetric lipid-based Janus nanoparticles (JNPs) developed by the Galien Institute can function as novel drug delivery vehicles or diagnostic agent carriers in the field of nanotechnology. To obtain this type of anisotropic particles, different raw materials (phospholipids and short-PEG-based surfactants or amphiphilic cyclodextrin derivatives) and preparation methods (hot high-pressure homogenization or nanoprecipitation) were compared. After that, we tried to optimize these JNPs in terms of knowledge of phospholipid effects and aqueous phase composition. Especially, the relationship between JNP morphology and phospholipid properties was established by considering the packing parameter of phospholipids. By investigating the interaction between phospholipids and short-PEG-based surfactants that constitute JNP, more information can be obtained.We are interested in the ability of classical Janus NPs to co-encapsulate the model drug pairs, and the dual phase release kinetics are quantified and adjusted by mathematic equations. Finally, we aim to explore the acute toxicity and morphological changes upon exposure to classical Janus NPs on the zebrafish larvae. Moreover, the fluorescence microscopy images showed that the biodistribution of nanoparticles is pretty consistent with the nanotoxicity and malformations determined in the larvae. This project verified that the multicompartmental supramolecular organizations are promising candidates for the co-encapsulation of the hydrophilic and hydrophobic active pharmaceutical ingredients

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Viklund, Fredrik. "Surfactants based on natural products - enzymatic synthesis and functional characterization". Doctoral thesis, KTH, Biotechnology, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3545.

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Surfactants are molecules that contain a water-soluble and afat-soluble part. They have important functions in productssuch as detergents, cosmetics, pharmaceuticals and foods aswell as in many industrial processes. Surfactants are used onvery large scale, which makes it important to decrease theirimpact on the environment. This can be done by starting withnatural materials, by improving the synthetic methods and byreducing the use of limited resources such as energy andorganic solvents.

This thesis focuses on lipase-catalyzed synthesis ofsurfactants based on natural products. It also includesfunctional studies of the produced surfactants; as antioxidantsin oils, or as surfactants to solubilize pharmaceuticals.

Unsaturated fatty acid esters of ascorbic acid weresynthesized with catalysis by Candida antarctica lipase B int-amyl alcohol and in ionic liquids. High yields ofascorbyl oleate were obtained in an ionic liquid that wasdesigned to improve the solubility of the fatty acid, when thereaction was performed under vacuum. Ascorbyl oleate wasamorphous and was a better antioxidant than ascorbyl palmitatein rapeseed oil.

Polyethylene glycol (PEG) stearate, PEG 12-hydroxystearateand a series of PEG 12-acyloxy-stearates were synthesized in avacuum-driven, solvent-free system usingC. antarcticalipase B as catalyst. Critical micelleconcentration and solubilization capacity were determined forthe PEG 12-acyloxy-stearates. Their effects on living cellswere evaluated in studies of hemolysis and transepithelialelectrical resistance. Several PEG1500 12-acyloxy-stearateswere excellent solubilizers for pharmaceutical use and hadnegligible negative effects on living cells even at highconcentrations.

Enzymatic and chemo-enzymatic methods offer uniquepossibilities to synthesize surfactants of high purity. Pureand well-defined surfactants enable new applications and areimportant for the understanding of surfactantstructure-function relationships.

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Streszczenia konferencji na temat "PEG-Based surfactants"

Kiani, Mohammad, Mohammad Ali Mirza, Elnaz Erfanian i Iman Jafarifar. "Wettability Alteration of Reservoir Rock by Nonionic, Anionic and Cationic Surfactant in Water-Based Drilling Fluid". W SPE International Conference on Oilfield Chemistry. SPE, 2023. http://dx.doi.org/10.2118/213881-ms.

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Abstract The interaction between clay minerals in formations and drilling fluids was analyzed through a study of four core plugs in different types of fluid, including gas oil, anionic surfactant (SDS), non-ionic surfactant (PEG), and cationic surfactant (CTAB). The core plugs were cut for petrophysical tests, including permeability, saturation, X-ray diffraction, and petrographical analyses. The original samples contained clay minerals such as illite and smectite. A static immersion test revealed that swelling and dispersing changed the original petrophysical rock properties of the samples. The addition of nanoparticles of Ca, K, Na, Cl at low, high, and saturated salinity in sodium chloride (NaCl), potassium chloride (KCl), and calcium chloride (CaCl2) was used to reduce active shale and increase mud density from 8.33 to 11.8 ppg, improving petrophysical rock properties by reducing filtration and swelling. The permeability and water saturation were measured before and after core injection of the drilling fluids. The results showed that surfactants (PEG) > (SDS) > (CTAB) in a water-based drilling fluid improved fluid loss and viscosity and reduced the interfacial tension, shifting the reservoir wettability towards a more water-wet state in low, high, and saturation salinity. The use of surfactants in water-based mud reduced formation damage and increased well productivity.

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