高等学校化学学报 ›› 2021, Vol. 42 ›› Issue (3): 857.doi: 10.7503/cjcu20200612

• 高分子化学 • 上一篇    下一篇

ABC三嵌段共聚物胶束从多间隔结构到多核结构转变的Monte Carlo模拟

樊娟娟1, 韩媛媛2(), 崔杰2()   

  1. 1.吉林农业大学信息技术学院, 长春 130118
    2.辽宁石油化工大学石油化工学院, 抚顺 113001
  • 收稿日期:2020-08-27 出版日期:2021-03-10 发布日期:2021-03-08
  • 通讯作者: 韩媛媛 E-mail:hanyuanyuan@lnpu.edu.cn;cuijie@lnpu.edu.cn
  • 作者简介:崔 杰, 男, 博士, 教授, 主要从事复杂高分子体系相行为模拟方面的研究. E-mail: cuijie@lnpu.edu.cn
  • 基金资助:
    吉林省教育厅“十三五”科学技术项目(JJKH20170292KJ);国家自然科学基金(21674115);辽宁省“兴辽英才计划”项目(XLYC1907188);辽宁石油化工大学引进人才科研启动基金(批准号(2019XJJL-014);2019XJJL-015)资助

Monte Carlo Simulation of the Transformation Control of ABC Triblock Copolymer Micelles from Multicompartment Structure to Multicore Structure

FAN Juanjuan1, HAN Yuanyuan2(), CUI Jie2()   

  1. 1.College of Information Technology,Jilin Agricultural University,Changchun 130118,China
    2.School of Petrochemical Engineering,Liaoning Shihua University,Fushun 113001,China
  • Received:2020-08-27 Online:2021-03-10 Published:2021-03-08
  • Contact: HAN Yuanyuan E-mail:hanyuanyuan@lnpu.edu.cn;cuijie@lnpu.edu.cn

摘要:

采用Monte Carlo模拟方法研究了疏水-亲水-疏水(H-P-H)型ABC三嵌段共聚物在B嵌段的选择性溶剂中的自组装行为. 模拟结果表明, 通过调节A嵌段和C嵌段的疏水性和二者之间的不相容性, 体系中可以形成多种形貌各异的胶束. 根据胶束中疏水核结构的特点, 这些胶束大体上可以被分为多核型胶束和多间隔型胶束两种类型. 通过增强疏水嵌段的疏水性或降低A嵌段和C嵌段间的不相容性, H-P-H型ABC三嵌段共聚物胶束能够发生从多核型胶束向多间隔型胶束的转变. 进一步分析胶束中聚合物的链构象等微观结构信息发现, A嵌段和C嵌段间的排斥作用和疏水作用之间存在竞争关系, 而这种竞争关系是影响体系中形成多核型胶束还是多间隔型胶束的决定性因素.

关键词: 两亲性嵌段共聚物, 多间隔胶束, 多核胶束, 分级有序结构, Monte Carlo模拟

Abstract:

The self-assembly behavior of ABC triblock terpolymers with hydrophobic-hydrophilic-hydrophobic(H-P-H) sequence in selective solvent of B blocks was studied by means of Monte Carlo simulation. The simulation results show that various micelles with different morphologies can be formed by adjusting the hydrophobicity and the incompatibility of A and C blocks. According to the characteristics of hydrophobic core structures in the micelles, these micelles can be generally divided into two types: multicore micelles and multicompartment micelles. By increasing the hydrophobicity of hydrophobic blocks or reducing the incompatibility between A and C blocks, the micelles formed by H-P-H type ABC triblock terpolymers can transform from multicore micelles to multicompartment micelles. Via further investigation on the chain conformations in typical micelles, it is found that there is competition between the hydrophobic interaction and the repulsion between A and C blocks, and this competition is the main factor that determines whether the multicore micelles or the multicompartment micelles can be formed by ABC triblock terpolymers with H-P-H sequence.

Key words: Amphiphilic block copolymer, Multicompartment micelle, Multicore micelle, Hierarchical structure, Monte Carlo simulation

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