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Recent Progress on Graft Polymerization of Natural Polymer Flocculants: Synthesis Method, Mechanism and Characteristic

[ Vol. 15 , Issue. 3 ]

Author(s):

Xiaomin Tang*, Xue Jiang, Shixin Zhang, Huaili Zheng and Xuemei Tan   Pages 227 - 235 ( 9 )

Abstract:


Natural polymer flocculants (NPF) and their derivatives as the eco-friendly, nontoxic and biodegradable materials have attracted significant attention in water treatment. The graft polymerization of NPF and its synthesis mechanisms that have been proposed in the literature are mainly reviewed in this paper. Initiation system is the key factor in the modification of NPF and it influences the characteristics of copolymer in terms of grafting efficiency, grafting percentage, molecular weight and cationic degree. Reaction time, reaction temperature and the molar ratio of monomer to NPF affect the synthesis of NPF as well. The modified NPF possessing the higher molecular weight and cationic degree contributes to the better coagulation-flocculation performance. The solubility of NPF is improved after grafting monomer onto the NPF backbone.

Keywords:

Natural polymer flocculants, graft polymerization, coagulation, initiation system, redox initiation, mass ratio of polymer.

Affiliation:

Chongqing Key Laboratory of Catalysis & Functional Organic Molecules, College of Environment and Resources, Chongqing Technology and Business University, Chongqing 400067, Chongqing Key Laboratory of Catalysis & Functional Organic Molecules, College of Environment and Resources, Chongqing Technology and Business University, Chongqing 400067, Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, State Ministry of Education, Chongqing University, Chongqing 400045, Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, State Ministry of Education, Chongqing University, Chongqing 400045, Chongqing Key Laboratory of Catalysis & Functional Organic Molecules, College of Environment and Resources, Chongqing Technology and Business University, Chongqing 400067

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