Reconfigurable and orthogonal stiffness-structure patterning of dynamically crosslinked amphigels  

作　　者：Chen Yang Weizhong Zheng Chujun Ni Ye Li Di Chen Tao Xie Qian Zhao 

机构地区：[1]State Key Laboratory of Chemical Engineering,College of Chemical and Biological Engineering,Zhejiang University,Hangzhou,China [2]Ningbo Innovation Center,Zhejiang University,Ningbo,China [3]School of Chemical Engineering,East China University of Science and Technology,Shanghai,China

出　　处：《SmartMat》2024年第2期145-155,共11页智能材料（英文）

基　　金：supported by the National Natural Science Foundation of China (Nos.22105167,U20A6001,and 52273112).

摘　　要：Patterning diversified properties and surface structure of polymer materials are of great importance toward their potential in biology,optics,and electronics.However,achieving both the patternability of stiffness and microstructure in a reconfigurable manner remains challenging.Here,we prepare amphigels crosslinked by dynamic disulfide bonds,which can be reversibly swollen by immiscible water or liquid paraffin.In the paraffingel form,the materials exhibited a high modulus of 130 MPa due to densified hydrogen bonds.Whereas swollen by water,the modulus fell over two orders of magnitude owing to the destruction of the hydrogen bonds.Via regionalized swelling of the solvents,well-controlled and rewritable soft/stiff mechanical patterns can be created.On the other hand,the dynamic exchange of the disulfide crosslinking enables mechanophoto patterning to fabricate sophisticated macrogeometries and microstructures.The reconfigurable stiffness-structure patterning can be manipulated orthogonally,which will create more application opportunities beyond conventional hydrogels and organogels.

关 键 词：amphigels dynamic crosslinking HYDROGELS ORGANOGELS surface patterning 

分 类 号：O63[理学—高分子化学]