文献类型：期刊文献

英文题名：Light-triggered reversible phase transition of non-photoresponsive PNIPAm for remote-controlled smart objects

作者：Zhang, Jiahao[1];Bai, Shengyu[1];Li, Zhongqi[1];Gu, Guanyao[1];Wang, Hucheng[1];Wei, Lai[1];Sun, Xun[3];Xuan, Fuzhen[1,2];Guo, Xuhong[1];Wang, Yiming[1,2]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Shanghai Key Lab Intelligent Sensing & Detect Tech, Shanghai 200237, Peoples R China;[3]Guizhou Aerosp Inst Measuring & Testing Technol, Guiyang 550009, Peoples R China

年份：2023

卷号：455

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20225013254088);WOS:【SCI-EXPANDED(收录号:WOS:000963946500001)】；

基金：We thank NSFC Grants (21908061) , "Chenguang Program" supported by Shanghai Education Development Foundation and Shanghai Municipal Education Commission (20CG37) , Natural Science Foundation of Shanghai (22ZR1417700) , and the ECUST Innovation Program for financial support.

语种：英文

外文关键词：PNIPAm; Patterning; Hydrogels; Dynamic chemistry; Out-of-equilibrium systems

摘要：Poly(N-isopropylacrylamide) (PNIPAm) is widely used for smart materials and devices owing to its thermoresponsiveness. Here we demonstrate how PNIPAm can be geared to show reversible phase transition in response to light rather than temperature through a simple signal transformation strategy. This strategy does not require the polymer to be tediously modified with any photoresponsive moieties, offering a new approach towards remotecontrolled smart objects. Our concept is achieved using a photoacid and simple PNIPAm-based copolymers. Upon switching on/off light, the photoacid releases/captures a chemical signal which can reversibly change the lower critical solution temperature (LCST) of the copolymers, thereby resulting in a fast (<0.5 min) and reversible phase transition of the copolymer without changing the ambient temperature. Thereon, a series of lightcontrolled dynamic patterns and conceptually smart soft actuators composed of the copolymers are fabricated. Such a signal transformation strategy enabling PNIPAm photoresponsiveness may boost the development of new non-contact smart objects with adaptive responsiveness.