温度及油酸钠复配对CTAB水溶液性质的影响  

The effect of temperature and sodium oleae(SO) mixture on surface activity and micelle formation of the aqueous solution of cetyltrimethylammonium bromide(CTAB)

作　　者：薛元英[1] 史振民[1] 巩育军[1] 王升文[1] 刘站刚 张珏 

机构地区：[1]延安大学化学与化学工程系,陕西延安716000

出　　处：《西北大学学报（自然科学版）》2002年第2期141-144,共4页Journal of Northwest University（Natural Science Edition）

基　　金：陕西省教委专项科研基金资助项目 (96 JK0 5 5 ) ;延安大学科研基金资助项目 (YD2 0 0 0 - 2 6 )

摘　　要：用滴体积法研究了温度及油酸钠 (SO)的复配对十六烷基三甲基溴化铵 (CTAB)水溶液的表面活性与胶团形成的影响。结果表明 :在 3 0 5～ 3 3 7K之间 ,CTAB的临界胶团浓度 (ccmc)随温度的升高而增大 ,形成胶团的过程是一个焓熵共同驱动的热力学自发过程 ;在 CTAB- SO复配体系中 ,正负离子表面活性剂之间存在着强烈的相互作用 ,等摩尔混合体系 (1∶ 1 )具有最高的表面活性 ,ccmc,γcmc,βm,βs和 p C2 0均具有最低值。The effect of temperature and SO mixture on the surface activity and micelle formation of the aqueous solution of CTAB has been studied by the drop volume method. Some thermodynamic parameters related to CTAB micelle have been worked out. The results indicate that at the temperature ranging from 305K to 337K,the critical micelle concentration of CTAB will increase as the temperature rises. Under certain temperature,the CTAB micelle formation process is a thermodynamically spontaneous process that was animated by the enthalpy and entropy.In the CTAB SO mixed system, the reciprocal strong action exists between the cationic and anionic surfactants, 1∶1 mixed system shows the highest surface activity. cmc, γ cmc , β m , β s and p C 20 all have minimum.

关 键 词：温度 CTAB 水溶液性质 十六烷基三甲基溴化铵 热力学参数 油酸钠复配 表面活性 胶团形成 表面活性剂 

分 类 号：O647.2[理学—物理化学]