高等学校化学学报 ›› 2022, Vol. 43 ›› Issue (11): 20220482.doi: 10.7503/cjcu20220482

• 高分子化学 • 上一篇    下一篇

氢键型水凝胶自修复行为的Monte Carlo模拟

高慧玲1, 曹珍珍1, 顾芳1(), 王海军1,2,3()   

  1. 1.河北大学化学与环境科学学院
    2.河北省化学生物学重点实验室
    3.教育部药物化学与分子诊断重点实验室, 保定 071002
  • 收稿日期:2022-07-15 出版日期:2022-11-10 发布日期:2022-08-21
  • 通讯作者: 顾芳,王海军 E-mail:fanggu@hbu.edu.cn;whj@hbu.edu.cn
  • 基金资助:
    河北省自然科学基金(B2022201050);河北省省级研究生示范课程项目(KCJSX2021007)

Monte Carlo Simulation on Self-healing Behaviour of Hydrogen-bonded Hydrogel

GAO Huiling1, CAO Zhenzhen1, GU Fang1(), WANG Haijun1,2,3()   

  1. 1.College of Chemistry and Environmental Science
    2.Chemical Biology Key Laboratory of Hebei Province
    3.Key Laboratory of Medicinal Chemistry and Molecular Diagnosis,Ministry of Education,Hebei University,Baoding 071002,China
  • Received:2022-07-15 Online:2022-11-10 Published:2022-08-21
  • Contact: GU Fang,WANG Haijun E-mail:fanggu@hbu.edu.cn;whj@hbu.edu.cn
  • Supported by:
    the Natural Science Foundation of Hebei Province, China(B2022201050);the Postgraduate Model Course of Hebei Province, China(KCJSX2021007)

摘要:

基于氢键型自修复水凝胶的结构特征构建了其横截面的格气模型, 并利用Monte Carlo模拟方法对其自修复行为进行研究. 首先根据自修复过程中的比热峰值确定了氢键的临界联结分数, 然后重点考察了氢键强度、 合作效应以及平均断面间距对其自修复行为的影响. 在此基础上, 进一步研究了氢键型凝胶的动态修复过程, 讨论了相关因素对自修复时间等动态性质的影响. 结果表明, 氢键型凝胶的自修复在本质上归属于一级热力学相变, 且氢键强度是自修复过程中的最关键因素. 同时, 初始断面间距和格子间的合作效应也可显著影响凝胶的自修复行为.

关键词: 氢键型水凝胶, 自修复, 格气模型, 相变

Abstract:

We present a lattice gas model for the cross sections of a hydrogen bonded(HB) self-healing hydrogel, and then the Monte Carlo method is employed to simulate its self-healing behavior. The peak of the specific heat in the self-healing process is obviously observed, by which the critical association fraction of hydrogen bonds is obtained to determine whether the self-healing can take place. Furthermore, the influences of the HB strength, cooperation effect, and the separation between the cross sections on the self-healing process are investigated. Consequently, the self-healing of the HB hydrogel is identified as the first-order thermodynamic phase transition, as expected. The HB strength plays the key role not only in thermodynamics but also in dynamics of self-healing process.

Key words: Hydrogen bonded Hydrogel, Self-healing, Lattice gas model, Phase transition

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