Results 31 to 40 of about 32,605 (302)

The Influence of Bicomponent Mixed Surfactants on Drop/Interface Coalescence [PDF]

Iranian Journal of Chemistry & Chemical Engineering, 2004
Effects of binary mixtures of ionic/nonionic (sodium dodecyl sulfate/2-heptanol or 1-decanol) and nonionic/nonionic surfactants (2-heptnol/1-decanol) on drop/interface coalescence of water drops in a continuous n-heptane phase were examined.
Parissa Khadiv Parsi, Mohammad Ali Moosavian   +1 more
doaj  

Crack Reduction during Drying Process by Using Surfactant [PDF]

MATEC Web of Conferences, 2019
In this research clay brick samples were made from illitic clays. Surfactant was added to clay mass during formation process to reduce crack generation during drying process.
Guzlena Sandra, Sakale Gita, Certoks Sergejs, Spule Arnita   +3 more
doaj   +1 more source

Toxicity of nonionic surfactants [PDF]

WIT Transactions on Ecology and the Environment, 2008
Nonionic surfactants are amphilic chemicals that enhance desorption and bioavailability by increasing solubility and dispersion of poorly soluble hydrocarbons and oils. This study was conducted to determine the toxicity of commercial nonionic surfactants by using the Microtox Acute Toxicity test which is a rapid, simple test for toxicity. The test uses
K. Jahan, S. Balzer, P. Mosto
openaire   +1 more source

An experimental study of the physical mechanisms of fluid flow in tight carbonate core samples by binary surfactants

Heliyon
Binary surfactants present a promising approach to modifying the petrophysical mechanisms of rock formations to enhance fluid flow, particularly in challenging environments like carbonate rocks.
Ayomikun Bello, Anastasia Ivanova, Alexander Rodionov, Tagir Karamov, Andrey Morkovkin, Alexey Cheremisin   +5 more
doaj   +1 more source

The influence of surfactant structure on the dyeing of polyamide knitting with acid dyes [PDF]

Chemical Industry and Chemical Engineering Quarterly, 2018
The influence of nonionic and anionic surfactants on the dyeing kinetics of polyamide 6 knitting was studied in this work. The influence of surfactants on the dyeing process is presented by determining the kinetic and thermodynamic parameters of dyeing ...
Ristić Nebojša N., Dodić Ivica R., Ristić Ivanka P.   +2 more
doaj   +1 more source

Photodegradation of nimodipine and felodipine in microheterogeneous systems [PDF]

, 2012
Indexación: Web of Science; ScieloThe photochemical behavior of nimodipine (NIMO) and felodipine (FELO), photolabile drugs widely used as antihypertensive calcium channel blockers, is studied in constrained media.
Brito, Julio, García, Cristóbal, Günther, Germán, Morales, Javier, Núñez-Vergara, Luis J., Pizarro, Nancy, Pozo, Andrés   +6 more
core   +1 more source

Effects of Spray Surfactant and Particle Charge on Respirable Coal Dust Capture

Safety and Health at Work, 2017
Background: Surfactant-containing water sprays are commonly used in coal mines to collect dust. This study investigates the dust collection performance of different surfactant types for a range of coal dust particle sizes and charges. Methods: Bituminous
Mei W. Tessum, Peter C. Raynor
doaj   +1 more source

Study to improve an amphoteric sulfonate alkyl ester surfactant by mixing with nonionic surfactant to reduce brine–waxy oil interfacial tension and to increase oil recovery in sandstone reservoir: T-KS field, Indonesia

Journal of Petroleum Exploration and Production Technology, 2018
Crude oil with a high wax content and high pour point can be very challenging when enhanced oil recovery by surfactant flooding is to be applied. High wax content in crude oil will lead to high intermolecular interaction because of the increasing ...
Taufan Marhaendrajana, Rani Kurnia, Dimas Irfana, Doddy Abdassah, Deana Wahyuningrum   +4 more
doaj   +1 more source

Study on the effect of NMR-based surfactants on pore wetting of high-order coal

Meitan kexue jishu, 2023
High-order coal has the characteristics of weak water absorption due to the development of micropores. From the perspective of micropores, it is of great significance to study the improvement effect of different types of surfactants on the wettability of
Ming YANG, Tao ZHANG, Xuebo ZHANG, Jing XU, Longxiang HAN, Ji MA   +5 more
doaj   +1 more source

Theoretical description of mixed film formation at the air/water interface : carboxylic acids–fatty amines

, 2020
Thermodynamic parameters of mixed monolayer formation of aliphatic amines CnH2n+1NH2 and carboxylic acids CnH2n+1COOH (n = 6–16) are calculated using the quantum chemical semiempirical PM3 method.
Fainerman, V., Kartashynska, E., Vollhardt, D., Vysotsky, Y., Zakharov, A.   +4 more
core   +1 more source