Jump to main content
Jump to site search

Issue 108, 2015
Previous Article Next Article

pH-Sensitive graphene oxide/sodium alginate/polyacrylamide nanocomposite semi-IPN hydrogel with improved mechanical strength

Author affiliations

Abstract

It is important and challenging to design a hydrogel that combines mechanical strength and stimuli responsiveness. In this study, graphene oxide (GO) was incorporated into the sodium alginate/polyacrylamide (SA/PAM) hydrogel as the reinforcement to promote the mechanical strength of the hydrogel. The hydrogel was prepared via in situ free-radical polymerization in the presence of SA with AM as the monomer and GO as the reinforcement, resulting in a GO/SA/PAM semi-interpenetrating polymer network (IPN). SA, cross-linking agent (N,N′-methylenebisacrylamide, BIS) and GO proportions were optimized to obtain a hydrogel with superior compressive strength. The GO18/SA0.1/PAM/BIS0.01 nanocomposite hydrogel (GO 18 mg, SA 0.1 g, BIS 0.01 g) displayed a compressive strength as high as 65.6 MPa at the compressive deformation of 80%. The hydrogel exhibited pH dependent swelling behavior and a maximum swelling ratio could be observed at pH 4 for the hydrogels with varied GO content. Moreover, the swelling behaviors of the semi-IPN hydrogels are dependent on the GO amounts, and the GO18/SA0.1/PAM/BIS0.01 hydrogel sample shows a lower swelling ratio due to its robust inner structures.

Graphical abstract: pH-Sensitive graphene oxide/sodium alginate/polyacrylamide nanocomposite semi-IPN hydrogel with improved mechanical strength

Back to tab navigation

Publication details

The article was received on 23 Sep 2015, accepted on 12 Oct 2015 and first published on 14 Oct 2015


Article type: Paper
DOI: 10.1039/C5RA19637J
RSC Adv., 2015,5, 89083-89091

  •   Request permissions

    pH-Sensitive graphene oxide/sodium alginate/polyacrylamide nanocomposite semi-IPN hydrogel with improved mechanical strength

    H. Zhang, X. Pang and Y. Qi, RSC Adv., 2015, 5, 89083
    DOI: 10.1039/C5RA19637J

Search articles by author

Spotlight

Advertisements