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Elgun E. Hasanov,Ravan A. Rahimov,Yusif Abdullayev,Ziyafaddin H. Asadov,Gulnara A. Ahmadova,Aygun M. Isayeva,Saida F. Ahmadbayova,Fedor I. Zubkov,Jochen Autschbach 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.86 No.-
Six cocogem surfactants were synthesized from N,N,Nʹ,Nʹ-tetra-(propane-2-olyl)-1,6-hexanediamine andhigher monocarboxylic acids: capric, lauric, myristic, palmitic, stearic and oleic. N,N,Nʹ,Nʹ-tetra-(propane-2-olyl)-1,6-hexanediamine was synthesized from hexamethylenediamine and propylene oxide at roomtemperature, without utilizing any catalyst or solvent. Surface tension, conductivity, foaming ability,foam stability, emulsion stability, viscosity and density measurements were performed on aqueoussolutions of all cocogem surfactants. Their surface activity and colloidal-chemical parameters such ascritical micelle concentration (CMC), surface pressure at CMC (pCMC), surface tension at CMC (gCMC),surface excess (Gmax), concentration required for 20 mN/m reduction of surface tension (C20), Gibbsenergies of adsorption and micellization (DGad and DGmic) were recorded and variation of theseparameters based on hydrophobic chain length and structure was investigated experimentally andcomputationally. Synthesized surfactants with myristic, palmitic, and stearic tail continued to decreasesurface tension even above CMC. The possible reason of this unusual behavior was determined based oncomputational studies. Surface activity parameters of cocogem surfactant with oleic tail disobeyed thegeneral tendency established by other cocogems with saturated tail group. Palmitic and stearic acid basedcocogem surfactants had good foam stability and the reason of this high foam stability was rationalizedwith high viscosity of their solutions.
Asadov, Ziyafaddin H.,Ahmadova, Gulnara A.,Rahimov, Ravan A.,Mammadova, Khuraman A. Korean Chemical Society 2011 대한화학회지 Vol.55 No.6
Novel surfactants have been synthesized by catalytic chloropropoxylation reaction of carboxylic acid fractions of sunflower, olive, cottonseed, soya-bean, castor and corn oils with 2-(chloromethyl)oxirane. Colloidal-chemical parameters as well as petroleum-collecting and petroleum-dispersing capacities of the synthesized chloropropoxylate esters having heterochain of various lengths have been determined. Influence of carboxylic acid fractions composition and length of chloroxypropylene chain on petroleum-collecting and dispersing capacities has been revealed.