Temperature-sensitive and solvent-resistance hydrogel sensor for ambulatory signal acquisition in“moist/hot environment”  

作　　者：Xinyu Qu Hanjun Sun Xiaolong Kan Bing Lei Jinjun Shao Qian Wang Wenjun Wang Zhenhua Ni Xiaochen Dong 

机构地区：[1]Key Laboratory of Flexible Electronics(KLOFE)&Institute of Advanced Materials(IAM),School of Physical and Mathematical Sciences,Nanjing Tech University(NanjingTech),Nanjing 211816,China [2]School of Physical Science and Information Technology,Liaocheng University,Liaocheng 252059,China [3]School of Physics and Key Laboratory of MEMS of the Ministry of Education,Southeast University,Nanjing 211189,China [4]School of Chemistry&Materials Science,Jiangsu Normal University,Xuzhou 221116,China

出　　处：《Nano Research》2023年第7期10348-10357,共10页纳米研究（英文版）

基　　金：The work was supported by the National Key R&D Program of China(No.2020YFA0709900);“Taishan scholars”construction special fund of Shandong Province。

摘　　要：To realize continuously and stably work in a“moist/hot environment”,flexible electronics with excellent humid resistance,antiswelling,and detection sensitivity are demanding.Herein,a solvent-resistant and temperature-ultrasensitive hydrogel sensor was prepared by combining MXene and quaternized chitosan(QCS)with the binary polymer chain.The strong electrostatic interaction between the QCS chain and the poly(acrylic acid)(PAA)network endows the hydrogel stability against solvent erosion,high temperature,and high humidity.The strong dynamic interaction between MXene and polymer matrix significantly improves the mechanical properties and sensing(strain and temperature)sensitivity of the hydrogel.The hydrogel strain sensor exhibits a high gauge factor(5.53),temperature/humidity tolerance(equilibrium swelling ratio of 2.5%at 80℃),and excellent cycle stability,which could achieve a remote and accurate perception of complex human motion and environment fluctuation under aquatic conditions.Moreover,the hydrogel sensor exhibits impressive thermal response sensitivity(-3.183%/℃),ultrashort response time(<2.53 s),and a low detection limit(<0.5℃)in a wide temperature range,which is applied as an indicator of the body surface and ambient temperature.In short,this study broadens the application scenarios of hydrogels in persistent extreme thermal and wet environments.

关 键 词：flexible electronics hydrogel sensor solvent-resistance underwater application 

分 类 号：O63[理学—高分子化学]