Reconfigurable and orthogonal stiffness‐structure patterning of dynamically crosslinked amphigels

Author:

Yang Chen12,Zheng Weizhong3,Ni Chujun1,Li Ye1,Chen Di12,Xie Tao1,Zhao Qian1ORCID

Affiliation:

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

Abstract

AbstractPatterning 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.

Funder

National Natural Science Foundation of China

Publisher

Wiley

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