Results 1 to 10 of about 38,503 (283)

The High Interfacial Activity of Betaine Surfactants Triggered by Nonionic Surfactant: The Vacancy Size Matching Mechanism of Hydrophobic Groups [PDF]

Molecules
Alkyl sulfobetaine shows a strong advantage in the compounding of surfactants due to the defects in the size matching of hydrophilic and hydrophobic groups.
Guoqiao Li, Jinyi Zhao, Lu Han, Qingbo Wu, Qun Zhang, Bo Zhang, Rushan Yue, Feng Yan, Zhaohui Zhou, Wei Ding   +9 more
doaj   +2 more sources

Nonylphenol Ethoxylate Surfactants Modified by Carboxyl Groups for Foam EOR at High-Salinity Conditions

Energies, 2021
High mineralization of water complicates the use of foam in reservoir conditions. Anionic–nonionic surfactants are one of the best candidates for these conditions since they have both high surface activity and salt tolerance.
Emil R. Saifullin, Shinar Zhanbossynova, Dmitrii A. Zharkov, Roman S. Pavelyev, Chengdong Yuan, Mikhail A. Varfolomeev, Ulukbek Zh. Mirzakimov, Sergey Yu. Ivanov, Sergey A. Sitnov   +8 more
doaj   +1 more source

The influence of surfactants of different classes on the toxicity of diesel fuel for Saccharomycetes [PDF]

E3S Web of Conferences, 2023
The effect on the survival of the yeast S. cerevisiae of mixtures of diesel fuel (summer variety) with four representatives of different classes of surfactants – cationic (cetyltrimethylammonium bromide), anionic (sodium dodecyl sulfate), nonionic (Tween-
Zhdanova Galina, Cherkasov Danila, Vyatchina Olga, Yampolskaya Tatyana, Zhou Qixing, Stom Devard   +5 more
doaj   +1 more source

Effect of Surfactants on Reverse Osmosis Membrane Performance

Separations, 2023
The aim of this study was to evaluate the performance of a reverse osmosis (RO) membrane in surfactant removal using various surfactant model aqueous solutions.
Aymen Halleb, Mitsutoshi Nakajima, Fumio Yokoyama, Marcos Antonio Neves   +3 more
doaj   +1 more source

Effects of Hydrophobic Silica on the Performance of Silicone-Based Antifoams [PDF]

Journal of Chemical and Petroleum Engineering, 2021
The efficiency of an antifoam consists of polydimethylsiloxane oil, hydrophobe silica particles, and either Sodium Dodecyl Sulfate (SDS) as an anionic surfactant, or Octyl phenyl deca ethylene oxide (Triton X-100) as nonionic surfactant for use in ...
Majid Ghiass, Atieh Askarizadeh, Hossien Bouhendi, Gholamreza Bagheri Marandi, Ghasem Naderi   +4 more
doaj   +1 more source

Nonionic Surfactant to Enhance the Performances of Alkaline–Surfactant–Polymer Flooding with a Low Salinity Constraint

Applied Sciences, 2020
This paper presents a nonionic surfactant in the anionic surfactant pair (ternary mixture) that influences the hydrophobicity of the alkaline–surfactant–polymer (ASP) slug within low-salinity formation water, an environment that constrains optimal ...
Shabrina Sri Riswati, Wisup Bae, Changhyup Park, Asep K. Permadi, Adi Novriansyah   +4 more
doaj   +1 more source

Structure Identification of Adsorbed Anionic–Nonionic Binary Surfactant Layers Based on Interfacial Shear Rheology Studies and Surface Tension Isotherms

Molecules, 2023
Mixtures of anionic sodium oleate (NaOl) and nonionic ethoxylated or alkoxylated surfactants improve the selective separation of magnesite particles from mineral ores during the process of flotation.
Ourania Oikonomidou, Margaritis Kostoglou, Thodoris Karapantsios   +2 more
doaj   +1 more source

Shape and Structure Formation of Mixed Nonionic–Anionic Surfactant Micelles

Molecules, 2021
Aqueous solutions of a nonionic surfactant (either Tween20 or BrijL23) and an anionic surfactant (sodium dodecyl sulfate, SDS) are investigated, using small-angle neutron scattering (SANS).
Michael Ludwig, Ramsia Geisler, Sylvain Prévost, Regine von Klitzing   +3 more
doaj   +1 more source

Surfactants, its applications and effects on environment

Bibechana, 2010
Surfactant is being considered as a very demandable molecule in the field of chemistry. This paper reviews most important factors especially the uses of surfactants and their effects on environment.
SK Shah, A Bhattarai, SK Chatterjee
doaj   +3 more sources

Effect of impurities in the description of surface nanobubbles: Role of nonidealities in the surface layer\ud [PDF]

, 2011
In a recent study [ S. Das, J. H. Snoeijer and D. Lohse Phys. Rev. E 82 056310 (2010)], we provided quantitative demonstration of the conjecture [ W. A.
Das, Siddhartha
core   +7 more sources