Muscle-inspired ion-sensitive hydrogels with highly tunable mechanical performance for versatile industrial applications

作     者：Ping Li Ziang Wang Xinxing Lin Xiaolin Wang Hui Guo 李平;王子昂;林新星;王晓琳;郭辉

作者机构：School of Chemical Engineering and TechnologySun Yat-sen UniversityZhuhai 519082China School of Pharmacy and State Key Laboratory of Quality Research in Chinese MedicineMacao University of Science and TechnologyTaipaMacaoChina 

出 版 物：《Science China Materials》 (中国科学（材料科学（英文版）)

年 卷 期：2022年第65卷第1期

页      面：229-236页

核心收录：

学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 

基　　金：supported by the National Natural Science Foundation of China(51903253) the Natural Science Foundation of Guangdong Province of China(2019A1515011150 and 2019A1515011258) the Science and Technology Development Fund of Macao(FDCT 0083/2019/A2) 

主　　题：crystalline hydrogels ion-responsive Hofmeister effect mechanical performance conductive hydrogels 

摘      要：Human muscles are notably toughened or softened with specific inorganic *** by this phenomenon,herein we report a simple strategy to endow hydrogels with comparable ion-responsive mechanical properties by treating the gels with different ionic ***-crystalline poly(vinyl alcohol)hydrogels are chosen as examples to illustrate this *** to muscles,the mechanical property of hydrogels demonstrates strong dependence on both the nature and concentration of inorganic *** at the same salt concentration,the hydrogels treated with different ionic solutions manifest a broad-range tunability in rigidity(Young’s modulus from 0.16 to 9.6 MPa),extensibility(elongation ratio from 100% to 570%),and toughness(fracture work from 0.82 to 35 MJm^(-3)).The mechanical property well follows the Hofmeister series,where the“salting-outsalts(kosmotropes)have a more pronounced effect on the reinforcement of the ***,the hydrogels’mechanical performance exhibits a positive correlation with the salt ***,it is revealed both the polymer solubility from amorphous domains and polymer crystallinity from crystalline domains are significantly influenced by the ions,which synergistically contribute to the salt-responsive mechanical *** from this feature,the hydrogels have demonstrated promising industrial applications,including tunable tough engineering soft materials,anti-icing coatings,and soft electronic devices.