阴阳离子混合表面活性剂的浓度变化对表面活性的影响  

The effects of concentration of Anionic-cationic surfactants on the surface activity

作　　者：谷名学[1] 宋丽[1] 李学刚 

机构地区：[1]西南师范大学化学化工学院,西南农业大学中心实验室

出　　处：《西南师范大学学报（自然科学版）》1996年第4期393-398,共6页Journal of Southwest China Normal University(Natural Science Edition)

基　　金：重庆市中青年专家基金

摘　　要：采用表面张力法、帆布沉降法、乳化法，研究了辛基苯基聚氧乙烯醚硫酸钠Ｃ８Ｈ１７Ｃ６Ｈ４（ＯＣＫＨ４）１０ＳＯ４Ｎａ（Ｃ８Ｅ１ｓＳ）和十二烷基７聚氧乙烯基醚硫酸钠ＣＬ１２Ｈ２５（ＯＣ２Ｈ４）７ＳＯ４Ｎａ（Ｃ１２Ｅ７Ｓ）与溴化十二烷基三甲铵Ｃ１２Ｈ２５Ｎ（ＣＨ３）３Ｂｒ（Ｃ１２ＮＭ３）形成的混合溶液的表面活性．结果表明，它们不仅能在水溶液中形成透明的均匀溶液，而且混合体系的临界胶团浓度（ｃｍｃ）和γｃｍｃ比单一组分的低得多．随着混合比的增加，Ｃ８Ｅ１０Ｓ－Ｃ１２ＮＭ３的润湿能力先增加，后下降．混合比改变时。Ｃ８Ｅ１０Ｓ－Ｃ１２ＮＭ３对煤油的乳化能力出现两个极大值和一个极小值．The surface activity of the mixture formed by C8H17C6H4(OC2H4)10SO4Na(C8E10S) and C12H25(OC2H4)7SO4Na(C12E7S) with C12H25N(CH3)3Br(C12NM3) hes been studied. The results show that the aqueous solution of the mixture of is homogeneous. The cmc and γcmc of C8E10S-C12NM3 and C12 E7S-C12NM3 are much lower than those of C8E10S, C12E7S and C12NM3. With the increase of mixed ratio, the wettability of C8E10S-C12NM3 goes up to the maximum firstly, and then wettability goes down. There are two maximum points and one minmum in the emulsification curve of C8E10S-C12 NM3 when the content of C12NM3 is changed from 0 to 1.

关 键 词：表面活性剂 表面张力 浓度 表面活性 

分 类 号：O647.2[理学—物理化学]