Construction of 3D Shape-Changing Hydrogels via Light-Modulated Internal Stress Fields

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维普
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外文摘要：The 3D shape-changing hydrogels are highly pursued for numerous applications.However,up to now,the construction of complex 3D shape-changing hydrogels remains a challenge.The reported design strategies are mainly applied to fabricate 2D ones by introducing anisotropic microstructures into hydrogel sheets/membranes.Herein,we present a convenient photolithography strategy for constructing complex 3D shape-changing hydrogels by simultaneously modulating anisotropic microstructures and internal stress fields of gel sheets.When the precursor solution containing ultraviolet(UV)absorber is irradiated by single-side UV light,the attenuated polymerization rate can cause the generation of asymmetric internal stress field in the resulting hydrogel sheet.In the meantime,the directional diffusion of unpolymerized monomers allows for the formation of vertical gradient structure within hydrogel.Therefore,by applying different photomasks to modulate the local gradient structures and internal stress fields of the gel sheets,they can spontaneously transform into various complex 3D shape-changing hydrogels in the air.Response to the external stimuli,these 3D shape-changing hydrogels(e.g.,fighter plane,birdie,and multi-storey origami lattices)can deform in a novel 3D1-to-3D2-to-3D3 mode.This new design strategy contributes to the development of complex biomedical implants and soft robotics.

外文关键词：

actuatorsanisotropic microstructurehydrogelsinternal stressshape transformation

作者：

Zihan Xu、Wenxin Fan、Jinghua Duan、Yanzhi Xia、Zhihong Nie、Kunyan Sui

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作者单位：

State Key Laboratory of Bio-Fibers and Eco-Textiles,College of Materials Science and Engineering,Shandong Collaborative Innovation Center of Marine Biobased Fibers and Ecological Textiles,Institute of Marine Bio-based Materials,Qingdao University,Qingdao 266071,China

State Key Laboratory of Molecular Engineering of Polymers,Department of Macromolecular Science,Fudan University,Shanghai 200438,China

基金：

国家自然科学基金国家自然科学基金国家自然科学基金Key Research and Development Project of Shandong ProvinceTechnology Development Project of Shinan District of QingdaoProgram for Taishan Scholar of Shandong Province,State Key Laboratory of Bio-Fibers and Eco-Textiles,Qingdao UniversityProgram for Taishan Scholar of Shandong Province,State Key Laboratory of Bio-Fibers and Eco-Textiles,Qingdao University

项目编号：

5200313351573080518730942016GGX1020052018-4-007-ZHG2RC202024ZDKT202006

出版年：

2023

DOI：

10.1002/eem2.12375

能源与环境材料(英文)

CSCD

ISSN：

年,卷(期)：2023.6(3)

参考文献量55