A rapid self-healing hydrogel based on PVA and sodium alginate with conductive and cold-resistant properties. Issue 13 (18th March 2020)

• Record Type: Journal Article
• Authors: Wu, Guangfeng; Jin, Kaiyun; Liu, Li; Zhang, Huixuan
• Is Part Of: Soft matter. Volume 16:Issue 13(2020)
• Page Start: 3319
• Page End: 3324
• Publication Date: 2020-03-18
• Subjects: Soft condensed matter -- Periodicals; 530.413
• DOI: 10.1039/c9sm02455g
• Languages: English
• ISSNs: 1744-683X

Abstract

Abstract : Self-healing hydrogels as renewable materials have attracted significant attention recently. 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.