Polarization-driven multifunctional organohydrogels with strain sensitivity toward electromagnetic wave absorption

作     者：Yunfei Zhang Lei Zhang Bingqian Zhou Yishan Gao Baoliang Zhang 

作者机构：School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’an 710072China Shaanxi Engineering and Research Center for Functional Polymers on Adsorption and SeparationSunresins New Materials Co.Ltd.Xi’an 710072China 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2024年第17卷第6期

页      面：5688-5697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：the support provided by the National Natural Science Foundation of China(Nos.22375166 and 21975206) Shaanxi Fundamental Science Research Project for Chemistry&Biology(No.22JHZ004) Natural Science Foundation of Chongqing(No.CSTB2022NSCQ-MSX0513) 

主　　题：organohydrogels molecular polarization microwave absorption strain sensor 

摘      要：Rapid advancements in flexible electronics and military applications necessitate high-performance electromagnetic wave(EMW)*** huge breakthroughs in achieving high-attenuation microwave absorption,conventional EMW absorbing materials have single function and ambiguous absorption ***,numerous gel-type absorbers are fabricated by introducing“regulatorsinto poly(acrylamide-co-acrylic acid)(P(AM-co-AA))networks through radical polymerization in a glycerol-water mixed *** dielectric constant and EMW absorption performance of the gels are precisely predicted by adjusting monomer concentration,the ratio of glycerol/water,and the content of the ***,A_(6)G_(20)T_(20)-2 exhibits promising absorption performance with a minimum reflection loss(RL_(min))of-33.8 dB at 12.4 *** effective absorption bandwidth(EAB)covers the entire X-band(8.2-12.4 GHz)at a thickness of 2.7 mm.A_(6)G_(20)T_(20)-2 also has sensitive deformation responses and excellent tensile strength,adhesiveness,self-healing and anti-freezing ***,this work not only provides insight into the polarization loss mechanism of the gels as the result of high correlation between EMW absorbing properties and molecular polarization,but also offers an important reference for developing functional protective materials because of the rich functionalities and efficient protective capabilities of the gels.