Format

Send to

Choose Destination
ACS Appl Mater Interfaces. 2017 Aug 9;9(31):26429-26437. doi: 10.1021/acsami.7b07445. Epub 2017 Jul 25.

Ultrastretchable and Self-Healing Double-Network Hydrogel for 3D Printing and Strain Sensor.

Author information

1
School of Mechanical and Aerospace Engineering, Nanyang Technological University , 50 Nanyang Avenue, Singapore 639798, Singapore.

Abstract

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.

KEYWORDS:

3D printing; double-network hydrogel; recoverability; self-healing; strain sensor

PMID:
28707465
DOI:
10.1021/acsami.7b07445

Supplemental Content

Full text links

Icon for American Chemical Society
Loading ...
Support Center