高分子溶液浸润相变的平均场理论研究  

Mean Field Theory Study on the Wetting Transitions of Polymer Solutions

作　　者：李钧超 张朋飞 Li Junchao;Zhang Pengfei(Advanced Low Dimensional Materials Center,School of Materials Science and Engineering,Donghua University,Shanghai 201620,China)

机构地区：[1]东华大学材料科学与工程学院先进低维材料中心,上海201620

出　　处：《山东化工》2024年第16期6-8,共3页Shandong Chemical Industry

基　　金：国家自然科学基金面上项目(22073016)。

摘　　要：利用自洽平均场理论,系统地研究了处于不良溶剂中的高分子在靠近单个固体表面的界面性质,分析了链长N、表面与高分子单体间相互作用力ε_(s)、溶剂质量x,以及高分子浓度∅_(b)等参数对沿垂直于基板方向z的高分子的密度分布∅_(z)和吸附量Γ等物理量的影响规律。当高分子溶液分别处于共存线的稀相区和浓相区时,通过分析∅_(z)和Γ随ε_(s)与溶剂质量x的变化规律,分别确定了浸润转变点和干燥转变点及其相变级别,发现了大部分情况下该浸润和干燥转变为一级相变。该研究为理解高分子溶液的界面性质提供了新的认识。The interfacial properties of polymers in poor solvent near a single solid surface were systematically studied by using the self-consistent mean field theory.The effects of chain length N,interaction between surface and polymer monomerε_(s),solvent quality x,and polymer concentration∅_(b)on the density distribution along the direction z perpendicular to the substrate∅(z)and the adsorption amountΓwere analyzed.The transition point of wetting and drying as well as the transition order were determined respectively,and it was found that in most cases,the transitions are of the first-order.This study provides new understandings on the interfacial properties of polymer solutions.

关 键 词：自洽平均场理论 不良溶剂 浸润现象 均聚物溶液 

分 类 号：O631.3[理学—高分子化学]