Analysis of Temperature and Alkyl Chain Length Impacts on the Morphological Peculiarities of Nonionic Surfactant Clusterization. A Quantum Chemical Approach

2015 ◽  
Vol 119 (32) ◽  
pp. 18404-18413 ◽  
Author(s):  
Yu. B. Vysotsky ◽  
E. S. Kartashynska ◽  
E. A. Belyaeva ◽  
D. Vollhardt ◽  
V. B. Fainerman ◽  
...  
Keyword(s):  
Nonionic Surfactant ◽  
Chain Length ◽  
Quantum Chemical ◽  
Alkyl Chain ◽  
Alkyl Chain Length ◽  
Chemical Approach ◽  
Quantum Chemical Approach

Substantivity of Various Anionic Surfactants Applied to Wool

1992 ◽  
Vol 62 (3) ◽  
pp. 140-143 ◽  
Author(s):  
L. A. Holt ◽  
J. S. Kelson ◽  
R. N. Reddie
Keyword(s):  
Nonionic Surfactant ◽  
Chain Length ◽  
Alkyl Chain ◽  
Anionic Surfactants ◽  
Alkyl Chain Length ◽  
Set Up ◽  
Ph Range

Wool samples containing various anionic surfactants (alkylbenzene sulphonates, primary and secondary alkane sulphonates, and an olefin sulphonate) lose some of the surfactant to the treatment liquor when subjected to typical dyeing conditions. At the boil, equilibrium is set up within 15 minutes between the concentration of surfactant in the liquor and that on the fiber. The extent of extraction is influenced by the alkyl chain length of the surfactant, the pH of the liquor, and the bath volume. For many surfactants, less than 5% is extracted at a 20:1 liquor/wool ratio in the pH range 5–6. The presence of nonionic surfactant in the treatment liquors results in slightly higher levels of extraction. Exhaustion of anionic surfactants onto wool gives distributions of surfactant between the wool and liquor similar to those obtained when treated wools are extracted under the same conditions of temperature, pH, and liquor/wool ratio.

Quantum chemical clarification of the alkyl chain length threshold of nonionic surfactants for monolayer formation at the air/water interface

2016 ◽  
Vol 18 (11) ◽  
pp. 7932-7937
Author(s):  
Yu. B. Vysotsky ◽  
E. S. Kartashynska ◽  
E. A. Belyaeva ◽  
D. Vollhardt ◽  
V. B. Fainerman ◽  
...  
Keyword(s):  
Chain Length ◽  
Quantum Chemical ◽  
Theoretical Basis ◽  
Nonionic Surfactants ◽  
Alkyl Chain ◽  
Alkyl Chain Length ◽  
Experimental Fact ◽  
Water Interface ◽  
Monolayer Formation ◽  
Air Water Interface

A theoretical basis is introduced for the experimental fact that for various surfactant classes the alkyl chain length threshold varies for the formation of condensed monolayers.

scholarly journals Silver Nanoparticles Stabilized with Phosphorus-Containing Heterocyclic Surfactants: Synthesis, Physico-Chemical Properties, and Biological Activity Determination

Nanomaterials ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1883
Author(s):  
Martin Pisárčik ◽  
Miloš Lukáč ◽  
Josef Jampílek ◽  
František Bilka ◽  
Andrea Bilková ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Biological Activity ◽  
Zeta Potential ◽  
Chain Length ◽  
Alkyl Chain ◽  
Chemical Properties ◽  
Alkyl Chain Length ◽  
Microbial Pathogens ◽  
Physico Chemical ◽  
Phosphorus Containing

Phosphorus-containing heterocyclic cationic surfactants alkyldimethylphenylphospholium bromides with the alkyl chain length 14 to 18 carbon atoms were used for the stabilization of silver nanodispersions. Zeta potential of silver nanodispersions ranges from +35 to +70 mV, which indicates the formation of stable silver nanoparticles (AgNPs). Long-chain heptadecyl and octadecyl homologs of the surfactants series provided the most intensive stabilizing effect to AgNPs, resulting in high positive zeta potential values and smaller diameter of AgNPs in the range 50–60 nm. A comparison with non-heterocyclic alkyltrimethylphosphonium surfactants of the same alkyl chain length showed better stability and more positive zeta potential values for silver nanodispersions stabilized with heterocyclic phospholium surfactants. Investigations of biological activity of phospholium-capped AgNPs are represented by the studies of antimicrobial activity and cytotoxicity. While cytotoxicity results revealed an increased level of HepG2 cell growth inhibition as compared with the cytotoxicity level of silver-free surfactant solutions, no enhanced antimicrobial action of phospholium-capped AgNPs against microbial pathogens was observed. The comparison of cytotoxicity of AgNPs stabilized with various non-heterocyclic ammonium and phosphonium surfactants shows that AgNPs capped with heterocyclic alkyldimethylphenylphospholium and non-heterocyclic triphenyl-substituted phosphonium surfactants have the highest cytotoxicity among silver nanodispersions stabilized by the series of ammonium and phosphonium surfactants.

scholarly journals Physico-chemical and gel properties of heat-induced pasteurized liquid egg white gel: effect of alkyl chain length of alcohol

2021 ◽  
Vol 24 (1) ◽  
pp. 1229-1243
Author(s):  
Danai Charoensuk ◽  
Robert G. Brannan ◽  
Wilailuk Chaiyasit ◽  
Wanlop Chanasattru
Keyword(s):  
Chain Length ◽  
Alkyl Chain ◽  
Egg White ◽  
Alkyl Chain Length ◽  
Gel Properties ◽  
Gel Effect ◽  
Physico Chemical
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