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synthesis and characterization of konjac glucomannan-graft-polyacrylamide via γ-irradiation合成和表征的魔芋通过γ-irradiation glucomannan-graft-polyacrylamide
Molecules 2008, 13, 490-500 molecules ISSN 1420-3049 © 2008 by MDPI /molecules Full Paper Synthesis and Characterization of Konjac Glucomannan-Graft-Polyacrylamide via γ-Irradiation Zhenlin Xu 1, Youhui Yang 1, Yueming Jiang 2, Yuanming Sun 1,*, Yudong Shen 1 and Jie Pang 1,3 1 College of Food Science, South China Agricultural University, Guangzhou 510642, P. R. China; E-mails: jallent@163.com; yhyang@; shenyudong@ 2 South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, P. R. China; E-mail: ymjiang@ 3 College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, R. China; E-mail: pang3721941@163.com * Author to whom correspondence should be addressed; E-mail: ymsun@ 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) was carried out at 25°C by γ-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
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