α-癸基甜菜碱的表面活性和胶体性质  

Surface activities and colloidal properties of α-capricbetaine

作　　者：王泽云[1,2] 张淑芬[1] 齐丽云 陈海兰 

机构地区：[1]大连理工大学精细化工系精细化工国家重点实验室,辽宁大连116012 [2]南风化工集团股份有限公司,山西运城044000 [3]江南大学化学与材料工程学院,江苏无锡214122

出　　处：《日用化学工业》2009年第2期85-88,共4页China Surfactant Detergent & Cosmetics

摘　　要：研究了两性表面活性剂α-癸基甜菜碱的表面活性与溶液性质。α-癸基甜菜碱亲水基团的立体结构有利于正、负电荷的相互作用,使得表面吸附层和胶束中表面活性剂分子排列更加紧密。实验测得溶液的最低表面张力为38.2 mN/m,临界胶束浓度为6.9×10-3mol/L,胶束形成标准自由能为-22.3 kJ.mol-1,胶束聚集数为74;表面活性剂溶液在等电点pH区域具有最低表面张力和临界胶束浓度。Surface activities and colloidal properties of the amphoteric surfactant, α- capricbetaine were studied. The stero - structure of α- capriebetaine＇ s hydrophilic group facilitates the mutual action of positive and negative charge, so as to cause the more close array of the surfactant molecules at the adsorption layer and in micelles. Experimental results showed that the lowest surface tension is 38. 2 mN/m, emc is 6. 9 × 10^-3 mol/L, standard free energy is - 22. 3 kJ · mol^-1, micellar aggregation number is 74. The surfactant solution displays the lowest surface tension and cmc at pH of the isoelectric point.

关 键 词：α-癸基甜菜碱 表面活性 胶体性质 

分 类 号：TQ423.3[化学工程]