Surfactants alkylamides

The first type is a standard polysoap derived from a polymerizable surfactant leading to poly(sodium 11-acryloyloxyundecane-l-sulfonate) PSl whereas the second polysoap is an alternating copolymer of maleic acid anhydride and acrylamide leading to a polymer with carboxylic acid groups and hydrophobic n-alkylamide groups PS2 (see Fig. 6.9). The organometaUic catalyst was not covalently bound to the polysoaps in the catalytic experiments. 

Although essentially pure soap products continue lo dominate the cleansing-bar field, a few products contain synthetic surfactams in addition 10 soap to act as scum and curd dispersants. Synthetic surfactants used in this application include alkyl sulfates, alkyl glyceryl ether sulfonates, alkyl esters of sodium isothionale. and alkylamides of N-melhyl tauride. 

Monomeric surfactants with alkylamide or dialkylamide groups in head For example, groups mostly carbonylpyrollidone and isopropylamide goups performed well in KHI polymers RF/NS (Kelland, 2000)... 

Garcia et al. [77,78] reported an electron transfer percolation threshold in highly resistive oil-continuous microemulsions. The Faradaic electron transfer is modulated by the amount of cosurfactant present in AOT-toluene-water microemulsions. Below a certain threshold concentration of the cosurfactant, the electron transfer between electroactive solutes in the water droplets and ultramicroelectrode is retarded or blocked. Electron transfer becomes facilitated, and a sharp increase in Faradaic current is observed above the threshold concentration. This effect was demonstrated for ruthenium hexamine reduction [77,78], ferrocyanide oxidation [77,78], acrylamide oxidation [77], and allQ lamide oxidation [77,79] with acrylamide, alkylamides, and acetonitrile as cosurfactants in AOT microemulsions. NMR results [80] suggest that there is an interfacial packing transition of the surfactant (AOT) at about the same cosurfactant concentration as the threshold transition observed electrochemically. 

An alkylamide arginine surfactant (where alkyl = Cio, C12, C14, C,g) was studied on a cyanoporpyl column (A = 210 nm) using a 42/58 water (0.075% TFA)/(80/20 acetonitrile/water with 0.1% TFA) mobile phase [1007]. All four components were baseline resolved in <13 min. Excellent peak shape resulted for a 1 pg injection. The colunm was severely overloaded at 25 pg injected. Linear ranges of 0.05-6 mM and detection limits of 0.007 mM (S/N = 3) were reported. 

A systematic investigation into structure-property relationship of novel long-chain A -alkylamide series 2 and O-alkyl ester series 3 arginine-based surfactants (Scheme 1) was carried out [25]. Compared to series 1, the new series 2 and 3 (Scheme 1) have two positively charged groups in the hydrophilic moiety, one in the primary amine and a second in the guanidine function. 

Chem. Descrip. Alkylamide blend Ionic Nature Nonionic Uses Surfactant for textiles Properties Solid 100% act. 

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