title: Preparation and properties of graphene oxide-regenerated cellulose/polyvinyl alcohol hydrogel with pH-sensitive behavior.
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.
authors.affiliation: Faculty of Printing, Packaging Engineering and Digital Media Technology, Xi'an University of Technology, Xi'an 710048, Shaanxi, People's Republic of China.
authors.forename: Xie
authors.initials: X
authors.lastname: Rui-Hong
authors.affiliation: Faculty of Printing, Packaging Engineering and Digital Media Technology, Xi'an University of Technology, Xi'an 710048, Shaanxi, People's Republic of China; State Key Laboratory of Polymer Materials Engineering, College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, Sichuan, People's Republic of China. Electronic address: rengpg@126.com.
authors.forename: Ren
authors.initials: R
authors.lastname: Peng-Gang
authors.affiliation: Faculty of Printing, Packaging Engineering and Digital Media Technology, Xi'an University of Technology, Xi'an 710048, Shaanxi, People's Republic of China.
authors.forename: Hui
authors.initials: H
authors.lastname: Jian
authors.affiliation: Faculty of Printing, Packaging Engineering and Digital Media Technology, Xi'an University of Technology, Xi'an 710048, Shaanxi, People's Republic of China.
authors.forename: Ren
authors.initials: R
authors.lastname: Fang
authors.affiliation: Faculty of Printing, Packaging Engineering and Digital Media Technology, Xi'an University of Technology, Xi'an 710048, Shaanxi, People's Republic of China.
authors.forename: Ren
authors.initials: R
authors.lastname: Lian-Zhen
authors.affiliation: Faculty of Printing, Packaging Engineering and Digital Media Technology, Xi'an University of Technology, Xi'an 710048, Shaanxi, People's Republic of China.
authors.forename: Sun
authors.initials: S
authors.lastname: Zhen-Feng
mesh_terms: D002482:Cellulose / Q000737:chemistry*; D006108:Graphite / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D010087:Oxides / Q000737:chemistry; D011142:Polyvinyl Alcohol / Q000737:chemistry*; D012972:Sodium Hydroxide / Q000737:chemistry; D013718:Tensile Strength; D014508:Urea / Q000737:chemistry; D014867:Water / Q000737:chemistry
chemical_list: D010087:Oxides; C062364:polyvinyl alcohol hydrogel; D014867:Water; D012972:Sodium Hydroxide; D006108:Graphite; D014508:Urea; D011142:Polyvinyl Alcohol; D002482:Cellulose
keywords: Cellulose; Graphene oxide; Poly(vinyl alcohol); Ternary hydrogel; pH-sensitivity