Ultrastretchable and Self-Healing Double-Network Hydrogel for 3D Printing and Strain Sensor
Ultrastretchable and Self-Healing Double-Network Hydrogel for 3D Printing and Strain Sensor
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DOI：
10.1021/acsami.7b07445
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发表时间：
2017-08-09
影响因子：
9.5
通讯作者：
Li, Lin
中科院分区：
文献类型：
--
作者：
Liu, Sijun;Li, Lin
基于K-卡拉胶在水中的热可逆溶胶-凝胶转变行为，将离子交联的K-卡拉胶网络与共价交联的聚丙烯酰胺（PAAm）网络相结合，制备了双网络（DN）水凝胶。K-角叉菜胶/PAAm DN水凝胶表现出优异的可恢复性和显著的自愈合能力（即使在有缺口时）。更重要的是，κ-卡拉胶/AAm的热预凝胶溶液可以用作三维（3D）打印机的油墨，以打印复杂的3D结构，在UV曝光后具有显著的机械强度。此外，κ-卡拉胶/PAAm DN水凝胶表现出很大的应变灵敏度，在1000%应变下的应变计因子为0.63，因此，该水凝胶可用作用于机器人和人体运动检测的敏感应变传感器。
On the basis of the thermoreversible sol-gel transition behavior of K-carrageenan in water, a double-network (DN) hydrogel has been fabricated by combining an ionically cross-linked kappa-carrageenan network with a covalently cross-linked polyacrylamide (PAAm) network. The kappa-carrageenan/PAAm DN hydrogel demonstrated an excellent recoverability and significant self-healing capability (even when notched). More importantly, the warm pregel solution of kappa-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 kappa-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.