title: Synthesis and characterisation of starch grafted superabsorbent via 10 MeV electron-beam irradiation.
abstract: A starch-graft-polyacrylamide (St-g-PAM) superabsorbent crosslinked by N,N'-methyl bisacrylamide (MBA) was prepared using 10 MeV simultaneous electron beam irradiation at room temperature and subsequent alkaline hydrolysis. The effects of the irradiation dose, acryliamide-to-anhydroglucose unit (AM-to-AGU) ratio and crosslinker amount on the properties of the obtained polymers were evaluated. The structure of the graft copolymer was confirmed by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscope (SEM). Optimisation treatments were carried out and found for a total dose of 8 kGy, an AM-to-AGU ratio of 4.5 mol mol(-1) and a crosslinker-to-AM ratio of 0.4%mol mol(-1). The obtained superabsorbent polymer showed the maximum absorptions of 1,452 gg(-1) and 83 gg(-1) for distilled water and saline solution, respectively (relative to its own dry weight). The results suggest 10 MeV electron beam irradiation is more efficient than γ-ray irradiation due to its higher energy and dose rate.
authors.affiliation: Institute of Nuclear Agricultural Sciences, Key Laboratory of Nuclear Agricultural Sciences of Ministry of Agricultural, Zhejiang University, Hangzhou 310029, China.
authors.forename: Sufen
authors.initials: S
authors.lastname: Zhang
authors.forename: Wei
authors.initials: W
authors.lastname: Wang
authors.forename: Haiyan
authors.initials: H
authors.lastname: Wang
authors.forename: Wenyuan
authors.initials: W
authors.lastname: Qi
authors.forename: Ling
authors.initials: L
authors.lastname: Yue
authors.forename: Qingfu
authors.initials: Q
authors.lastname: Ye
mesh_terms: D000042:Absorption; D000180:Acrylic Resins / Q000138:chemical synthesis* / Q000737:chemistry*; D060326:Chemistry Techniques, Synthetic; D004583:Electrons; D020100:Hydrogels / Q000737:chemistry; D006868:Hydrolysis; D002365:Manihot / Q000737:chemistry; D058105:Polymerization; D013213:Starch / Q000737:chemistry*; D013499:Surface Properties; D013696:Temperature; D013997:Time Factors; D000099166:Polyacrylamides
chemical_list: D000180:Acrylic Resins; D020100:Hydrogels; D013213:Starch; D000099166:Polyacrylamides
keywords: AGU; AM; Acrylamide; D; E; EB; Electron beam irradiation; GE; GR; Graft copolymerisation; ICP-AES; N,N-MBA; N,N-methylene bisacylamide; SAP; St; Starch; Superabsorbent; acrylamide; anhydroglucose unit; electron beam; energy; grafting efficiency; grafting ratio; inductively coupled plasma-atomic emission spectrometer; irradiation dose; starch; superabsorbent polymers