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An effective DLP 3D printing strategy of high strength and toughness cellulose hydrogel towards strain sensing by Zhengqiang Guo; Chengdong Ma; Weigui Xie; Aimin Tang; Wangyu Liu is a Materials Science article available to read on EtoBox.

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Photocurable 3D printing technology has outperformed extrusion-based 3D printing technology in material adaptability, resolution, and printing rate, yet is still limited by the insecure preparation and selection of photoinitiators and thus less reported. In this work, we developed a printable hydrogel that can effectively facilitate various solid or hollow structures and even lattice structures. The chemical and physical dual-crosslinking strategy combined with cellulose nanofibers (CNF) significantly improved the strength and toughness of photocurable 3D printed hydrogels. In this study, the tensile breaking strength, Young's modulus, and toughness of poly(acrylamide-co-acrylic acid)D/cellulose nanofiber (PAM-co-PAA)D/CNF hydrogels were 375 %, 203 % and 544 % higher than those of the traditional single chemical crosslinked (PAM-co-PAA)S hydrogels, respectively. Notably, its outstanding compressive elasticity enabled it to recover under 90 % strain compression (about 4.12 MPa). Resultantly, the proposed hydrogel can be utilized as a flexible strain sensor to monitor the motions of human movements, such as the bending of fingers, wrists, and arms, and even the vibration of a speakin

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Author

Zhengqiang Guo; Chengdong Ma; Weigui Xie; Aimin Tang; Wangyu Liu

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Materials Science (Physical Sciences)