文献类型：期刊文献

英文题名：Programmable and Shape-Color Synchronous Dual-Response Wood with Thermal Stimulus

作者：Tan, Yi[1] Wang, Kaili[2] Dong, Youming[2] Gong, Shanshan[1] Lu, Yun[3] Shi, Sheldon Q.[4] Li, Jianzhang[1]

第一作者：Tan, Yi

通信作者：Gong, SS[1];Li, JZ[1];Lu, Y[2]

机构：[1]Beijing Forestry Univ, State Key Lab Efficient Prod Forest Resources, MOE Key Lab Wooden Mat Sci & Applicat, Beijing Key Lab Wood Sci & Engn, Beijing 100086, Peoples R China;[2]Nanjing Forestry Univ, Coll Mat Sci & Engn, Coinnovat Ctr Efficient Proc & Utilizat Forest Res, Nanjing 210037, Peoples R China;[3]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China;[4]Univ North Texas, Dept Mech & Energy Engn, Denton, TX 76203 USA

年份：2024

卷号：18

期号：8

起止页码：6718-6730

外文期刊名：ACS NANO

收录：;EI(收录号：20240615525549);Scopus(收录号：2-s2.0-85184318442);WOS:【SCI-EXPANDED(收录号:WOS:001162245300001)】；

基金：This work was financially supported by the Nation Key Research and Development Program of China (No. 2017YFD0601205), National Natural Science Foundation of China ( Nos. 31722011, 32122058), and Beijing Forestry University Outstanding Young Talent Cultivation Project (No. 2019JQ03004).

语种：英文

外文关键词：wood; dynamic covalent vitrimers; shape memory; shape programming; shape-colorsynchronous dual-responsiveness

摘要：Stimuli-responsive materials exhibit huge potential in sensors, actuators, and electronics; however, their further development for reinforcement, visualization, and biomass-incorporation remains challenging. Herein, based on the impregnation of thermochromic microcapsule (TCM)-doped dynamic covalent vitrimers, a programmable shape-color dual-responsive wood (SRW-TC) was demonstrated with robust anisotropic structures and exchangeable covalent adaptable networks. Under mild conditions, the resultant SRW-TC displays feasible shape memorability and programmability, resulting from the rigidity-flexibility shift induced by the glass-transition temperature (34.99 C-degrees) and transesterification reaction triggered by the topology freezing transition temperature (149.62 C-degrees). Furthermore, the obtained SRW-TC possesses satisfactory mechanical performance (tensile strength of 45.70 MPa), thermal insulation (thermal conductivity of 0.27 W/m K), anisotropic light management, and benign optical properties (transmittance of 51.73% and haze of 99.67% at 800 nm). Importantly, the incorporation of compatible TCM enables SRW-TC to visualize shape memory feasibility and rigidity/flexibility switching and respond to the external thermal stimulus through the thermal-induced shape-color synchronous dual-responsiveness, which successfully demonstrates the applications of sensing temperature, grasping objects, encrypting/decoding icon messages, and so on. The proposed facile and highly effective strategy could serve as a guideline for developing high-performance multifunctional wood composite with promising intelligent applications in performance visualization, environmental sensing, materials interactivity, information dual-encryption, local precision shape and color regulation, etc.