原子与分子物理学报2024，Vol.41Issue(3)：33-40,8.DOI:10.19855/j.1000-0364.2024.031005
水合作用与pH调控聚电解质刷的构象转变
Hydration and pH-regulated switching of polyelectrolyte brush
摘要
Abstract
Based on the Flory-Huggins theory,we established a theoretical model to study the conformational transition of polyelectrolyte brushes regulated by hydration and pH.The theoretical model considers the interac-tion between polyelectrolyte chains and water molecules(hydration of polyelectrolyte chains)and electrostatic in-teractions in the system.We found that the polyelectrolyte brushes change from swelling to collapse with the change of hydration.This suggests that hydration can largely modulate the polyelectrolyte brush phase transition.By analyzing the regulation effect of pH,we also found that in an alkaline environment(pH=8),the dissocia-tion degree of the polyelectrolyte chain monomer increases,and the electrostatic repulsion will make the polyelec-trolyte brush swell.This suggests that the coupling of hydration and electrostatic effects in polyelectrolyte brushes will jointly determine the conformational transition properties of polyelectrolyte brushes.The theoretical results profoundly reveal that the change of hydration will cause the phase transition of the polyelectrolyte brush system,and the pH can change the phase transition characteristics to a large extent.关键词
水合作用/pH/聚电解质刷/构象转变Key words
Hydration/pH/Polyelectrolyte brushes/Switching分类
数理科学引用本文复制引用
李康睿,马奭文,王利云,赵新军..水合作用与pH调控聚电解质刷的构象转变[J].原子与分子物理学报,2024,41(3):33-40,8.基金项目
国家自然科学基金(22163011) （22163011）
伊犁师范大学科研创新团队培育计划(CXZK2021022) （CXZK2021022）
