Tough Polymeric Hydrogels Based on Amino Acid Derivative Mediated Dynamic Metal Coordination Bonds  

作　　者：Meng Li Meng-Yuan Zhang Wu-Xuan Lei Zhu-Ting Lv Qing-Hua Shang Zheng Zhao Jiang-Tao Li Yi-Long Cheng 

机构地区：[1]Engineering Research Center of Energy Storage Materials and Devices,Ministry of Education,School of Chemistry,Xi’an Jiaotong University,Xi’an,710049,China [2]Polymer Materials&Engineering Department School of Materials Science&Engineering,Chang’an University,Xi’an,710064,China [3]School of Electrical Engineering,Xi’an Jiaotong University,Xi’an,710049,China [4]Department of Nuclear Medicine,the First Affiliated Hospital of China,Xi’an Jiaotong University,Xi’an,710049,China

出　　处：《Chinese Journal of Polymer Science》2024年第10期1578-1588,I0014,共12页高分子科学（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.52322309 and 52173139);the“Young Talent Support Plan”of Xi’an Jiaotong University;Fundamental Research Funds for the Central Universities(No.xzy022023018)。

摘　　要：Abstract The development of physically crosslinked hydrogels with excellent mechanical and sensing properties is of importance for expanding the practical applications of intelligent soft hydrogel materials.Herein,after copolymerization of hydroxyl-containing amino acid derivative N-acryloyl serine(ASer)with acrylamide(AM),we introduce Zr4+through an immersion strategy to construct metal ion-toughened non-covalent crosslinked hydrogels(with tensile strength of up to 5.73 MPa).It is found that the synergistic coordination of hydroxyl and carboxyl groups with Zr^(4+)substantially increases the crosslinking density of the hydrogels,thereby imparting markedly superior mechanical properties compared to hydroxyl-free Zr^(4+)-crosslinked hydrogels,such as N-acryloyl alanine(AAla)copolymerized with AM hydrogels(with tensile strength of 2.98 MPa)Through the adjustment of the composition of the copolymer and the density of coordination bonds,the mechanical properties of the hydrogels can be modulated over a wide range.Additionally,due to the introduction of metal ions and the dynamic nature of coordination bonds,the hydrogels also exhibit excellent sensing performance and good self-recovery properties,paving the way for the development of flexible electronic substrates with outstanding comprehensive performances.

关 键 词：HYDROGEL Amino acid Metal coordination Mechanical performance Flexible sensor 

分 类 号：TQ427.26[化学工程] O641.4[理学—物理化学]