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Synthesis and Characterization of Konjac Glucomannan-Graft-Polyacrylamide via γ-Irradiation
College of Food Science, South China Agricultural University, Guangzhou 510642, P. R. China
South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, P. R. China
College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, R. China
* Author to whom correspondence should be addressed.
Received: 16 January 2008; in revised form: 20 February 2008 / Accepted: 20 February 2008 / Published: 1 March 2008
Abstract: The synthesis of konjac glucomannan-graft-polyacrylamide (KGM-g-PAM) wascarried out at 25°C by γ-irradiation under a N2 atmosphere. The effects of absorbedradiation dosage and monomer concentration on grafting yield and water absorbency werestudied. 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). Thegrafting yield was observed to increase with increasing absorbed dosage and monomerconcentration. Compared with the original KGM, the grafted copolymers exhibited betterthermal stability and water absorbency. The results suggest that γ-irradiation is convenientand efficient for inducing graft copolymerization of KGM and acrylamide (AM).
Keywords: Konjac glucomannan; polyacrylamide; graft copolymerization; γ-irradiation
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MDPI and ACS Style
Xu, Z.; Yang, Y.; Jiang, Y.; Sun, Y.; Shen, Y.; Pang, J. Synthesis and Characterization of Konjac Glucomannan-Graft-Polyacrylamide via γ-Irradiation. Molecules 2008, 13, 490-500.
Xu Z, Yang Y, Jiang Y, Sun Y, Shen Y, Pang J. Synthesis and Characterization of Konjac Glucomannan-Graft-Polyacrylamide via γ-Irradiation. Molecules. 2008; 13(3):490-500.
Xu, Zhenlin; Yang, Youhui; Jiang, Yueming; Sun, Yuanming; Shen, Yudong; Pang, Jie. 2008. "Synthesis and Characterization of Konjac Glucomannan-Graft-Polyacrylamide via γ-Irradiation." Molecules 13, no. 3: 490-500.