title: Synthesis of wheat straw cellulose-g-poly (potassium acrylate)/PVA semi-IPNs superabsorbent resin.
abstract: To better use wheat straw and minimize its negative impact on environment, a novel semi-interpenetrating polymer networks (semi-IPNs) superabsorbent resin (SAR) composed of wheat straw cellulose-g-poly (potassium acrylate) (WSC-g-PKA) network and linear polyvinyl alcohol (PVA) was prepared by polymerization in the presence of a redox initiating system. The structure and morphology of semi-IPNs SAR were characterized by means of FTIR, SEM and TGA, which confirmed that WSC and PVA participated in the graft polymerization reaction with acrylic acid (AA). The factors that can influence the water absorption of the semi-IPNs SAR were investigated and optimized, including the weight ratios of AA to WSC and PVA to WSC, the content of initiator and crosslinker, neutralization degree (ND) of AA, reaction temperature and time. The semi-IPNs SAR prepared under optimized synthesis condition gave the best water absorption of 266.82 g/g in distilled water and 34.32 g/g in 0.9 wt% NaCl solution.
authors.affiliation: Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, 250100 Jinan, PR China.
authors.forename: Jia
authors.initials: J
authors.lastname: Liu
authors.forename: Qian
authors.initials: Q
authors.lastname: Li
authors.forename: Yuan
authors.initials: Y
authors.lastname: Su
authors.forename: Qinyan
authors.initials: Q
authors.lastname: Yue
authors.forename: Baoyu
authors.initials: B
authors.lastname: Gao
authors.forename: Rui
authors.initials: R
authors.lastname: Wang
mesh_terms: D000042:Absorption; D000178:Acrylamides / Q000737:chemistry; D000179:Acrylates / Q000138:chemical synthesis* / Q000737:chemistry; D002236:Carbohydrate Conformation; D002482:Cellulose / Q000031:analogs & derivatives* / Q000138:chemical synthesis* / Q000737:chemistry; D003432:Cross-Linking Reagents / Q000737:chemistry; D007700:Kinetics; D058105:Polymerization; D011145:Polyvinyls / Q000138:chemical synthesis* / Q000737:chemistry; D012996:Solutions; D017550:Spectroscopy, Fourier Transform Infrared; D013499:Surface Properties; D014908:Triticum / Q000737:chemistry; D014867:Water / Q000737:chemistry
chemical_list: D000178:Acrylamides; D000179:Acrylates; D003432:Cross-Linking Reagents; D011145:Polyvinyls; D012996:Solutions; D014867:Water; D002482:Cellulose; C021221:N,N'-methylenebisacrylamide