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Issue 13, 2020
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A rapid self-healing hydrogel based on PVA and sodium alginate with conductive and cold-resistant properties

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Abstract

Self-healing hydrogels as renewable materials have attracted significant attention recently. However, traditional self-healing hydrogels require a long time for self-healing and cannot be used at low temperatures. Besides, their poor biocompatibility limits the application of hydrogels. Herein, we have prepared a hydrogel composed of polyvinyl alcohol (PVA) and modified sodium alginate. Due to the dynamic recombination of borate bonds, these hydrogels show a strong self-healing ability, with the shortest self-healing time up to 15 seconds. Also, glycerin (GI) was added into the hydrogel to increase the cold resistance of the hydrogel. At −25 °C, the hydrogel still displayed good frost resistance and elasticity. NaCl and other inorganic salts were added to endow the hydrogel with good electrical conductivity. The hydrogel also had good skin-like properties and could activate the capacitive screen of an electronic device.

Graphical abstract: A rapid self-healing hydrogel based on PVA and sodium alginate with conductive and cold-resistant properties

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Supplementary files

Article information


Submitted
14 Dec 2019
Accepted
24 Feb 2020
First published
24 Feb 2020

Soft Matter, 2020,16, 3319-3324
Article type
Paper

A rapid self-healing hydrogel based on PVA and sodium alginate with conductive and cold-resistant properties

G. Wu, K. Jin, L. Liu and H. Zhang, Soft Matter, 2020, 16, 3319
DOI: 10.1039/C9SM02455G

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