十六烷基溴化吡啶水溶液的动态吸附量研究

Study on the Dynamic Adsorption of Aqueous Cetylpyridinium Bromide Solutions

滴体积法测定了十六烷基溴化吡啶(CPB)水溶液的动态表面张力。不同浓度的溶液遵从不同的动态表面状态方程,浓度低于0.031 mol·m^(-3)时,动态吸附量T_1遵从由Henry吸附等温式导出的动态表面状态方程;浓度位于0.031～0.560mol·m^(-3)的较大范围内,T_1遵从由Langmuir和Freundlich等温式导出的动态表面状态方程;在更高的浓度下(如0.683 mol·m^(-3)),T_1只遵从从Langmuir等温式得出的表面状态方程。

The dynamic surface tensions（DST） of aqueous cetylpyridinium bromide（CPB） solutions at various concentrations was measured, by using the drop volume method. It was checked experimentally that various solutions with different concentrations had the different dynamic surface state equations. When CPB concentration 〈0.031 mol·m^-3, the dynamic adsorption Г＇t obeyed dynamic surface state equation obtained from the Henry isotherm. Гt can be described by the dynamic surface state equations derived from the Langmuir and Freundlich isotherms in the concentration range 0. 031-0. 560 mol·m^-3. At high CPB concentrations, （for example 0. 683mol· m^-3）, it only obeyed the dynamic surface state equation derived from the Langmuir isotherm.