文献类型：期刊文献

英文题名：Temperature-Mediated Phase Separation Enables Strong yet Reversible Mechanical and Adhesive Hydrogels

作者：Zhang, Lei[1,2] Wang, Siheng[1,2] Wang, Zhuomin[1,2] Liu, Zeyu[3] Xu, Xu[4] Liu, He[1,2] Wang, Dan[1,2] Tian, Ziqi[5,6]

通信作者：Liu, H[1];Wang, D[1];Liu, H[2];Wang, D[2];Tian, ZQ[3];Tian, ZQ[4]

机构：[1]Chinese Acad Forestry, Natl Engn Res Ctr Low Carbon Proc & Utilizat Fores, Natl Forestry & Grassland Adm, Inst Chem Ind Forestry Prod,Key Lab Biomass Energy, Nanjing 210042, Peoples R China;[2]Chinese Acad Forestry, Jiangsu Coinnovat Ctr Efficient Proc & Utilizat Fo, Nanjing 210042, Peoples R China;[3]Jiangsu Univ Sci & Technol, Sch Environm & Chem Engn, Zhenjiang 212100, Peoples R China;[4]Nanjing Forestry Univ, Coll Chem Engn, Jiangsu Coinnovat Ctr Efficient Proc & Utilizat Fo, Nanjing 210037, Peoples R China;[5]Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Inst New Energy Technol, Ningbo 315201, Peoples R China;[6]Univ Chinese Acad Sci, Beijing 100049, Peoples R China

年份：2023

外文期刊名：ACS NANO

收录：;EI(收录号：20233114456619);Scopus(收录号：2-s2.0-85165779504);WOS:【SCI-EXPANDED(收录号:WOS:001025924600001)】；

基金：This research was undertaken, in part, thanks to funding from the National Natural Science Foundation of China (Grant No. 31890774) to H.L., the Forestry Science and Technology Innovation and Extension Project of Jiangsu Province (Grant No. LYKJ[2021]04) to H.L., and the National Natural Science Foundation of China (Grant No. 31971599) to D.W.

语种：英文

外文关键词：phase separation; tunable mechanical strength; strong yet reversible adhesive; cellulose hydrogel; self-powered e-skin

摘要：Hydrogelswith strong yet reversible mechanical and adhesivepropertiesfabricated in a facile and friendly manner are important for engineeringand intelligent electronics applications but are challenging to createand control. Existing approaches for preparing hydrogels involve complicatedpretreatments and produce hydrogels that suffer from limited skinapplicability. Copolymerized hydrogels are expected to present anintriguing target in this field by means of thermoresponsive features,while the perceived intrinsic flaws of brittleness, easy fracture,and weak adhesion enervate the development prospects. Herein, we reporta hydrogel with strong yet reversible mechanical and adhesive propertiesusing cellulose nanofibrils to simultaneously address multiple dilemmasinspired by a temperature-mediated phase separation strategy. Thisstrategy applies temperature-driven formation and dissociation ofhydrogen bonds between common copolymers and cellulose nanofibrilsto trigger the onset and termination of phase separation for dynamicallyreversible on-demand properties. The resulting hydrogel exhibits upto 96.0% (117.2 J/m(2) vs 4.8 J/m(2) for interfacialtoughness) and 85.7% (0.02 MPa vs 0.14 MPa for mechanical stiffness)adhesive and mechanical tunability when worked on skin, respectively.Our strategy offers a promising, simple, and efficient way to directlyachieve robust adhesion performance in one step using common copolymersand biomass resources, with implications that could go beyond strongyet adhesive hydrogels.