title: Graphene Oxide/Polyacrylamide/Aluminum Ion Cross-Linked Carboxymethyl Hemicellulose Nanocomposite Hydrogels with Very Tough and Elastic Properties.
abstract: Development of high-strength hydrogels has recently attracted ever-increasing attention. In this work, a new design strategy has been proposed to prepare graphene oxide (GO)/polyacrylamide (PAM)/aluminum ion (Al(3+) )-cross-linked carboxymethyl hemicellulose (Al-CMH) nanocomposite hydrogels with very tough and elastic properties. GO/PAM/Al-CMH hydrogels were synthesized by introducing graphene oxide (GO) into PAM/CMH hydrogel, followed by ionic cross-linking of Al(3+) . The nanocomposite hydrogels were characterized by means of FTIR, X-ray diffraction (XRD), and scanning electron microscopy/energy-dispersive X-ray analysis (SEM-EDX) along with their swelling and mechanical properties. The maximum compressive strength and the Young's modulus of GO3.5 /PAM/Al-CMH0.45 hydrogel achieved values of up to 1.12 and 13.27 MPa, increased by approximately 6488 and 18330 % relative to the PAM hydrogel (0.017 and 0.072 MPa). The as-prepared GO/PAM/Al-CMH nanocomposite hydrogels possess high strength and great elasticity giving them potential in bioengineering and drug-delivery system applications.
authors.affiliation: State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Wushan Road 381, Tianhe District, Guangzhou, 510640, China.
authors.forename: Weiqing
authors.initials: W
authors.lastname: Kong
authors.affiliation: State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Wushan Road 381, Tianhe District, Guangzhou, 510640, China.
authors.forename: Danyang
authors.initials: D
authors.lastname: Huang
authors.affiliation: State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Wushan Road 381, Tianhe District, Guangzhou, 510640, China.
authors.forename: Guibin
authors.initials: G
authors.lastname: Xu
authors.affiliation: State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Wushan Road 381, Tianhe District, Guangzhou, 510640, China. renjunli@scut.edu.cn.
authors.forename: Junli
authors.initials: J
authors.lastname: Ren
authors.affiliation: State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Wushan Road 381, Tianhe District, Guangzhou, 510640, China.
authors.forename: Chuanfu
authors.initials: C
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Wushan Road 381, Tianhe District, Guangzhou, 510640, China.
authors.forename: Lihong
authors.initials: L
authors.lastname: Zhao
authors.affiliation: Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Qihuadong Road 35, Haidian District, Beijing, 100083, China.
authors.forename: Runcang
authors.initials: R
authors.lastname: Sun
keywords: aluminum; graphene oxide; hydrogels; nanotechnology; synthetic methods