Ultrastretchable and Self-Healing Double-Network Hydrogel for 3D Printing and Strain Sensor,ACS Applied Materials & Interfaces

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Ultrastretchable and Self-Healing Double-Network Hydrogel for 3D Printing and Strain Sensor
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2017-07-25 00:00:00 , DOI: 10.1021/acsami.7b07445
Sijun Liu ₁ , Lin Li ₁

Affiliation

On the basis of the thermoreversible sol–gel transition behavior of κ-carrageenan in water, a double-network (DN) hydrogel has been fabricated by combining an ionically cross-linked κ-carrageenan network with a covalently cross-linked polyacrylamide (PAAm) network. The κ-carrageenan/PAAm DN hydrogel demonstrated an excellent recoverability and significant self-healing capability (even when notched). More importantly, the warm pregel solution of κ-carrageenan/AAm can be used as an ink of a three-dimensional (3D) printer to print complex 3D structures with remarkable mechanical strength after UV exposure. Furthermore, the κ-carrageenan/PAAm DN hydrogel exhibited a great strain sensitivity with a gauge factor of 0.63 at the strain of 1000%, and thus, the hydrogel can be used as sensitive strain sensors for applications in robotics and human motion detection.

中文翻译：

用于3D打印和应变传感器的超拉伸和自修复双网络水凝胶

基于κ-角叉菜胶在水中的热可逆溶胶-凝胶转变行为，通过将离子交联的κ-角叉菜胶网络与共价交联的聚丙烯酰胺（PAAm）结合，制备了双网络（DN）水凝胶。网络。κ-角叉菜胶/ PAAm DN水凝胶具有出色的可回收性和显着的自我修复能力（即使有缺口）。更重要的是，κ-角叉菜胶/ AAm的温暖的预凝胶溶液可以用作三维（3D）打印机的墨水，以在紫外线照射后打印出具有显着机械强度的复杂3D结构。此外，κ-角叉菜胶/ PAAm DN水凝胶在1000％应变下表现出很大的应变敏感性，应变系数为0.63，因此，

更新日期：2017-07-26

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