Multi-cyclic Swelling for Self-regulated Growth of Covalently Crosslinked Polymers  

作　　者：De-Fu Zhu Hong Wang Jian Chen Xin-Hong Xiong Jia-Xi Cui 

机构地区：[1]Yangtze Delta Region Institute(Huzhou),University of Electronic Science and Technology of China,Huzhou 313001,China [2]Key Laboratory of Theoretical Organic Chemistry and Functional Molecule of Ministry of Education,Hunan Provincial Key Laboratory of Controllable Preparation and Functional Application of Fine Polymers,Hunan Provincial Key Lab of Advanced Materials for New Energy Storage and Conversion,Hunan Province College Key Laboratory of QSAR/QSPR,School of Chemistry and Chemical Engineering,Hunan University of Science and Technology,Xiangtan 411201,China [3]Institute of Fundamental and Frontier Sciences,University of Electronic Science and Technology of China Chengdu,Chengdu 611731,China

出　　处：《Chinese Journal of Polymer Science》2025年第3期509-516,共8页高分子科学(英文版)

基　　金：financially supported by the National Natural Science Foundation of China(Nos.52203135 and 52273206);Postdoctoral Fellowship Program of CPSF(No.GZC20230372);Huzhou Science and Technology Program Projects(No.2023GZ18);Zhejiang Postdoctoral Research Project(No.ZJ2023133);Science and Technology Cooperation Fund Program of Chengdu-Chinese Academy of Science;Hunan Provincial Natural Science Foundation(No.2021JJ10029);Huxiang High-level Talent Gathering Project(No.2022RC4039)。

摘　　要：Organisms are capable of self-growth through the integration of the nutrients provided by the external environment.This process slows down when they grow.In this study,we mimicked this self-regulated growth via a simple swelling-polymerization strategy in which the stretching polymer chains in the original networks provide entropic elasticity to restrict growth in high growth cycles.Using typical covalently crosslinked polymers,such as acrylamide-based hydrogels and HBA-based elastomers,as examples,we demonstrate that the crosslinked polymers can absorb polymerizable compounds through a swelling-polymerization process to expand their sizes,but the growth extent becomes smaller with increasing growth cycle until reaching a plateau.In addition to their size,these materials become stiffer and exhibit less swelling ability in solvents.Our work not only provides a new growing mode to tune the properties of crosslinked polymers but also discloses the underlying mechanism of crosslinked polymers in multi-cyclic swelling conditions.

关 键 词：Crosslinked polymers SWELLING Self-growing Mechanical property 

分 类 号：O63[理学—高分子化学]