Dynamic diselenide bond-enabled liquid crystal elastomer-based two-way shape memory aerogels with weldability and closedloop recyclability  

作　　者：Meng Wang Jingshu Li Hong Yang 

机构地区：[1]Institute of Advanced Materials,School of Chemistry and Chemical Engineering,State Key Laboratory of Digital Medical Engineering,Southeast University,Nanjing,China

出　　处：《Smart Molecules》2023年第3期80-88,共9页智能分子（英文）

基　　金：the National Natural Science Foundation of China(No.22325501,21971037,52173109).

摘　　要：Two-way shape memory polymeric aerogels(2W-SMPAs),with the ability to undergo reversible shape deformation in response to external stimuli,have extensive application in diverse fields such as actuators,sensors,robotics,and other relevant domains.In this study,we introduce a novel approach for fabricating a 2W-SMPA material based on liquid crystal elastomers(LCEs)incorporating dynamic diselenide bonds.The aerogel exhibits liquid crystal phases,excellent compressibility and shape stability,and the mesogens are uniaxial-oriented along the stretching direction.By capitalizing on the dynamic diselenide bonds,the LCEbased aerogel demonstrated remarkable reprogrammability,weldability,and recyclability through thermal reorganization.The shape-programmed aerogel sample exhibits reversible shrinking deformation during the heating and cooling cycles,ultimately achieving a maximum shrinkage ratio of 26.1%.Moreover,the LCE-based aerogel's porous structure and monodomain orientation effectively enable the adsorption of the photothermal dye DR1 and facilitated the reversible photothermal-induced shape deformation when exposed to 520 nm light irradiation.These findings reveal the potential application of this innovative LCE-based aerogel material,enabled by dynamic diselenide bonds,in various areas including control devices,soft actuators,and other diverse fields.

关 键 词：AEROGEL dynamic diselenide bond liquid crystal elastomer two-way shape memory 

分 类 号：O61[理学—无机化学]