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研究以全氟丁基为基础的、在酸性环境中具有高表面活性的叔胺盐酸盐型阳离子氟表面活性剂C_4F_9SO_2NH(CH_2)_3NH(CH_3)_2+Cl~-(简称PFB-MC)的油水界面张力以及不同添加物的影响。通过界面张力测定,考察Na Cl、盐酸、正丁醇、异丁醇、正戊醇、正己醇,以及烷基三甲基氯化铵〔CnH_(2n+1)N(CH_3)_3Cl,n=12,16,18〕对PFB-MC水溶液-正庚烷界面张力的影响。分别测定PFB-MC与烷基磺酸钠CnH_(2n+1)SO_3Na(n=4,6,8)复配体系的表面张力及正庚烷-水界面张力,并与十二烷基苯磺酸钠(SDBS)复配的界面张力结果进行对比。结果表明,较高浓度的NaCl、盐酸、脂肪醇均能使体系的油水界面张力降低,但仅降低1~3 m N/m;烷基磺酸钠与PFB-MC表现出很好的协同性,体系的油水界面张力显著降低(降低4~9 m N/m),且界面张力随烷基磺酸钠碳链的增长而降低;而PFB-MC与SDBS复配由于溶解性的原因体系界面张力很高,其清液的界面张力为18.6m N/m。
To study the effects of perfluorobutyl-based, tertiary amine hydrochloride-based cationic fluorosurfactant C_4F_9SO_2NH (CH_2) _3NH (CH_3) _2 + Cl ~ - (PFB-MC) with high surface activity in acidic environment Oil-water interfacial tension and the effects of different additives. The interfacial tension measurements of NaCl, HCl, n-butanol, isobutanol, n-amyl alcohol, n-hexanol and alkyltrimethylammonium chloride [CnH 2n + 1N (CH 3) 12,16,18] on the interfacial tension of PFB-MC aqueous solution-n-heptane. The surface tension and the n-heptane-water interfacial tension between PFB-MC and sodium alkyl sulfonate CnH_ (2n + 1) SO_3Na (n = 4,6,8) The results of the interfacial tension of sodium and sodium (SDBS) compounded were compared. The results showed that higher concentrations of NaCl, hydrochloric acid and fatty alcohol all decreased the oil-water interfacial tension of the system, but only decreased 1 ~ 3 m N / m; sodium alkyl sulfonate showed good synergism with PFB-MC , The oil-water interfacial tension of the system decreased significantly (by 4 ~ 9 m N / m), and the interfacial tension decreased with the increase of the carbon chain of sodium alkylsulfonate. However, the interfacial tension between PFB-MC and SDBS due to solubility Tension is high with an interfacial tension of 18.6 m N / m.