气-液界面上十六烷基溴化吡啶水溶液动态表面张力的研究  

Studies on dynamic surface tension of aqueous cetylpyridinium bromide solutions at air/liquid interface

作　　者：罗世地[1] 莫春生[2] 

机构地区：[1]湛江海洋大学理学院,广东湛江524088 [2]湛江师范学院生命科学与化学学院,广东湛江524048

出　　处：《化学研究与应用》2005年第2期180-182,共3页Chemical Research and Application

基　　金：广东省自然科学基金项目 (0 40 114 3 2 );湛江师范学院科学研究基金项目

摘　　要：滴体积法测定了十六烷基溴化吡啶溶液的动态表面张力。考察了浓度、温度对动态表面张力的影响。讨论了十六烷基溴化吡啶分子在气/液界面上的吸附动力学,发现吸附遵从扩散一动力学控制机理.从表观扩散系数计算了吸附能垒。The dynamic surface tensions(DST)of aqueous cetylpyridinium bromide (CPB)solutions at various concentrations and temperatures were measured by the drop volume method,the effect of concentration and temperature on the dynamic surface tension was discussed.The adsorption kinetics of CPB at air/liquid interface was investigated.The results show that the surface adsorption of cetylpyridinium bromide molecules obeys the diffusion—kinetics controlled mechanism.By using the values of the apparent diffusion coefficients,the adsorption barrier was estimated.The possible factors causing the absorption barrier were also analyzed qualitative.

关 键 词：动态表面张力 十六烷基溴化吡啶 吸附动力学 滴体积法 

分 类 号：O647.1[理学—物理化学]