Transparent, intrinsically stretchable cellulose nanofiber-mediated conductive hydrogel for strain and humidity sensing

被引:68
作者
Bian, Ziyu [1 ,2 ]
Li, Yinghui [1 ,2 ]
Sun, Hongling [1 ,2 ]
Shi, Mengyu [1 ,2 ]
Zheng, Yanjun [1 ,2 ]
Liu, Hu [1 ,2 ]
Liu, Chuntai [1 ,2 ]
Shen, Changyu [1 ,2 ]
机构
[1] Zhengzhou Univ, Key Lab Mat Proc & Mold, Minist Educ, Zhengzhou 450002, Henan, Peoples R China
[2] Zhengzhou Univ, Natl Engn Res Ctr Adv Polymer Proc Technol, Zhengzhou 450002, Henan, Peoples R China
基金
中国国家自然科学基金;
关键词
Nanocomposite hydrogel; Transparency; High stretchability; Multisensory function; Human monitoring; RAPID-RESPONSE; SENSOR;
D O I
10.1016/j.carbpol.2022.120300
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Conductive hydrogels (CHs) have attracted considerable attentions in the fields of wearable electronics, disease diagnosis, and artificial intelligence. However, it is still a great challenge to prepare a single CH system with integrated characteristics of high stretchability, good transparency, and multisensory function through a simple fabrication process. Herein, carboxylic cellulose nanofibers (CCNF) were used to assist the homogeneous distribution of opaque conductive poly(3,4-ethylenedioxythiophene): poly(styrene sulfonate) (PEDOT: PSS) into the crosslinked polyacrylamide network for the fabrication of stretchable and transparent interpenetrating network CH, aiming for a high-performance multisensory system. As expected, the ready formation of hydrogen bonds between the water molecules and a great deal of hydrophilic groups in the hydrogel endow the obtained CH with excellent humidity response behavior in a wide range (0-85%), and the introduction of CCNF and PEDOT: PSS is proved to be an effective strategy to enhance the humidity sensitivity, exhibiting great potential for the noncontact sensing of human respiration and finger movement. Meanwhile, it also displays excellent strain sensing behavior with favorable sensitivity in a broad range (0-837 %), fast response and reliable stability and reproducibility. Importantly, our prepared CH can also detect and discriminate complicated human activities and physiological signals. All these demonstrate the superiority of our prepared CH for the new generation of flexible wearable electronics.
引用
收藏
页数:10
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