固液界面高分子吸附研究(Ⅰ)──模型的建立和检验

A STUDY ON ADSORPTION OF POLYMER AT SOLID/LIQUID INTERFACE(Ⅰ) ──MODEL DEVELOPMENT AND TEST

从常用密堆积格子模型导出了高分子溶液中自由高分子链节的几率表达式，在此基础上，通过类比的方法，建立了固液界面层中自由高分子链节的几率表达式，与DiMarzio-Rubin的高分子统计矩阵方法相结合，从而建立了基于密堆积格子的固液界面吸附模型．模型预测的高分子在界面层中的浓度分布与MC计算机模拟结果进行了比较，表明基于RevisedFreed和Guggenheim模型的固液界面吸附模型的计算结果比基于Flory-Huggins理论的模型计算结果，更接近于MC模拟值．

The free segment probability of polymer solution was derived with Flory-Huggins model,Guggenheim model and Revised Freed model of Hu et.al.On this basis,the corresponding free segment proability of polymer at the adsorption layer of the solid/liquid interface was established by the method of amalogy.Combining with DiMarzio-Rubin’s matrix statistical method,the polymer adsorption models at the solid/liquid interface based on close packed latticed model were established.The polymer concentration profiles predicted by these models have been compared with the Monte Carlo computer simulation results.It was shown that the calculated results by adsorption model based on revised Freed model and the Guggenheim model were better than that by adsorption model based on the Flory-Huggins theory.