Preparation and properties of graphene oxide-regenerated cellulose/polyvinyl alcohol hydrogel with pH-sensitive behavior

Carbohydrate Polymers
Xie Rui-HongSun Zhen-Feng

Abstract

In this study, graphene oxide reinforced regenerated cellulose/polyvinyl alcohol (GO-RCE/PVA) ternary hydrogels were successfully prepared via a repeated freezing and thawing method in NaOH/urea aqueous solution. The effect of GO content on the mechanical properties, swelling behavior, water content of composite hydrogels was investigated. It was found that the mechanical properties of GO-RCE/PVA ternary hydrogels were largely enhanced relative to RCE/PVA hydrogels. With the addition of 1.0wt% GO, the tensile strength was increased by 40.4% from 0.52MPa to 0.73MPa, accompanied by the increase of the elongation at break (from 103% to 238%). Meanwhile, GO-RCE/PVA ternary hydrogels performed the excellent pH-sensitivity, and the higher pH leaded to higher swelling ratio. With 0.8wt% GO loading, the swelling ratio of GO-RCE/PVA ternary hydrogel was improved from 150% (pH=2) to 310% (pH=14). In addition, a slight increase in the water content of the ternary hydrogel was achieved with increasing concentrations of GO. It is believed that this novel ternary hydrogels is a promising material in the application of biomedical engineering and intelligent devices.

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Citations

Jan 30, 2020·Nanomaterials·Beatriz SalesaÁngel Serrano-Aroca
Feb 14, 2019·Journal of Biomedical Materials Research. Part B, Applied Biomaterials·Xiang Yi ChenMohd Amin Mohd Cairul Iqbal
Apr 8, 2020·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Lian-Hua FuPengbo Wan
Dec 13, 2019·Carbohydrate Polymers·Athanasia Amanda SeptevaniDewi Sondari
Mar 18, 2021·ACS Biomaterials Science & Engineering·Jamie J GrantAilish Breen
May 1, 2021·Nanomaterials·Le Minh Tu PhanSungbo Cho
Feb 24, 2020·International Journal of Biological Macromolecules·Mar Llorens-GámezÁngel Serrano-Aroca
Apr 16, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Jing ZhangJie Feng

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