文献类型：期刊文献

英文题名：High-Strength and Tough Acid-Base Complex Hydrogels with Memory-Forgetting and Shape-Memory Features

作者：Guo, Xiang[1];Wang, Hong[2,3];Xiong, Xinghong[3];Zhao, Shifang[1];Li, Mei[4];Chang, Qi[5];Cui, Jiaxi[2,3]

机构：[1]Shaoxing Univ, Sch Med, Shaoxing 312000, Peoples R China;[2]Univ Elect Sci & Technol China, Inst Fundamental & Frontier Sci, Chengdu 611731, Sichuan, Peoples R China;[3]Univ Elect Sci & Technol China, Yangtze Delta Reg Inst Huzhou, Huzhou 313001, Peoples R China;[4]Qilu Univ Technol, Shandong Acad Sci, Sch Mat Sci & Engn, Jinan 250353, Peoples R China;[5]Inst Mil Training Med, 2 Huaxia West Rd, Luoyang 471031, Henan, Peoples R China

年份：2023

外文期刊名：SMALL SCIENCE

收录：ESCI(收录号：WOS:001033803000001)、Scopus(收录号：2-s2.0-85172274483)、WOS

基金：Acknowledgements G.X. and H.W. contributed equally to this work. This work was financially supported by the National Natural Science Foundation of China (51973023, 52202135), Sichuan Science and Technology Program (2021JDRC0014), and the Colleges and Universities Twenty Foundational Projects of Jinan City (2021GXRC068).

语种：英文

外文关键词：acid-base complex; dynamic supramolecular hydrogels; mechanical properties; memory-forgetting features; shape-memory

外文摘要：Complexes associated with strong electrostatic interactions constitute a valuable method to construct tough hydrogels, but current systems are either unstable in saline environments or lead to relatively soft matrices. Herein, a class of acid-base complex (ABC) hydrogels made from poly(2-(dimethylamino)ethyl methacrylate) and glassy poly(methacrylic acid) (PMA) is reported. The tough hydrogels are prepared via a dialysis-free process and maintain their structure in saline solutions. Results indicate that the glassy feature of PMA endows the ABC hydrogels with high moduli (227 MPa), typical yielding points (3 MPa), and moderate stretchability (300% strain). The glassy backbones (PMA chains) are stiff at low temperatures, and would be melted at high temperatures, which bring about interesting shape-memory effects and inverse memory-forgetting behaviors. These results may inspire a simple but powerful strategy to design innovative hydrogel materials.