title: Synthesis and characterization of konjac glucomannan-graft-polyacrylamide via gamma-irradiation.
abstract: The synthesis of konjac glucomannan-graft-polyacrylamide (KGM-g-PAM) was carried out at 25 degrees C by gamma-irradiation under a N2 atmosphere. The effects of absorbed radiation dosage and monomer concentration on grafting yield and water absorbency were studied. The grafted copolymers were characterized using Fourier Transform Infrared(FTIR) spectroscopy, nuclear magnetic resonance (NMR), x-ray diffraction (XRD),thermogravimetric analysis (TGA) and gel permeation chromatography (GPC). The grafting yield was observed to increase with increasing absorbed dosage and monomer concentration. Compared with the original KGM, the grafted copolymers exhibited better thermal stability and water absorbency. The results suggest that gamma-irradiation is convenient and efficient for inducing graft copolymerization of KGM and acrylamide (AM).
authors.affiliation: College of Food Science, South China Agricultural University, Guangzhou 510642, PR China. jallent@163.com
authors.forename: Zhenlin
authors.initials: Z
authors.lastname: Xu
authors.forename: Youhui
authors.initials: Y
authors.lastname: Yang
authors.forename: Yueming
authors.initials: Y
authors.lastname: Jiang
authors.forename: Yuanming
authors.initials: Y
authors.lastname: Sun
authors.forename: Yudong
authors.initials: Y
authors.lastname: Shen
authors.forename: Jie
authors.initials: J
authors.lastname: Pang
mesh_terms: D000180:Acrylic Resins / Q000138:chemical synthesis* / Q000737:chemistry*; D002152:Calorimetry, Differential Scanning; D005720:Gamma Rays; D009682:Magnetic Resonance Spectroscopy; D008351:Mannans / Q000138:chemical synthesis* / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D013818:Thermogravimetry; D014961:X-Ray Diffraction; D000099166:Polyacrylamides
chemical_list: D000180:Acrylic Resins; D008351:Mannans; D000099166:Polyacrylamides; C022901:(1-6)-alpha-glucomannan