L-天冬氨酸与阴离子表面活性剂SDS的相互作用

Interaction between the L-Aspartic Acid and SDS Micelle System

用电导法、表面张力法和荧光探针法测定了L-天冬氨酸(L-Asp)对十二烷基硫酸钠(SDS)胶束聚集性能的影响以及L-Asp在SDS胶束中的定位,用循环伏安法研究了SDS/H2O体系中L-Asp的电化学特性.结果表明,L-Asp的加入能使SDS的临界胶束浓度cmc减小、胶束的聚集数增加.SDS表面胶束和SDS/n-C4H9OH/表面混合胶束均对L-Asp电化学氧化具有一定的催化作用.

The interaction between the L-aspartic acid (L-Asp) and SDS was studied by the determination of surface tension and conductivity and the method of cyclic voltammetry. The results indicate that the L-Asp can decrease the critical micellar concentration, but increase the aggregation numbers of SDS micelles. The admicelles of SDS formed on the electrode can make the catalytic efficiency for electrochemical oxidation of L-Asp first increase, then decrease. However, addition of n-C4H9OH can adjust the catalytic efficiency.