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A cleaner two-step synthesis of high purity diallyldimethylammonium chloride monomers for flocculant preparation

Journal of Environmental Sciences 2005年第5期17卷 798-801页

作者： TIAN Bing-hui FAN Bin PENG Xian-jia LUAN Zhao-kun State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental Sciences Chinese Academy of SciencesBeijing 100085 China

In order to improve the flocculation efficiency of polydiallyldimethylammonium chloride（PDADMAC）, high molecular weight PDADMAC should be prepared from high purity diallyldimethylammonium chloride（DADMAC） monomers. In this paper, a cleaner method with microwave irradiation and alkali solidification was proposed for preparing high pure DADMAC by selective heating under low temperature, and the prepared high purity DADMAC is characterized using FTIR and atomic absorption spectrometry. The new method provides a solution to the key technical problem of PDADMAC synthesis. Comparing with the conventional methods, the results showed that the advantages of the novel synthesis include：（a） high purity DADMAC is improved from 57% to 71% ; （b） reaction time of tertiary amine preparation is shortened from 6 h to 7 min; （c） water instead of acetone was used as reaction medium; （d） toxic by-products, wastewater and waste gas are eliminated. Flocculant made from the synthesized high purity DADMAC monomers was proved more efficient in flocculation tests.

关键词： diallyldimethylammonium chloride microwave irradiation flocculant cleaner process

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AN EFFECTIVE METHOD TO IMPROVE THE WET STRENGTH OF POLY(DIALLYLDIMETHYL-AMMONIUM chloride)HYDROGELS

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Chinese Journal of Polymer Science 2002年第1期20卷 39-44页

作者：哈鸿飞 Department of Technical Physics Peking University Beijing 100871 China

New IPN hydrogels composed of diallyldimethylammonium chloride (DADMAC) and natural macromolecule, kappa-carrageenan (KC) were prepared by gamma irradiation and their properties were studied, The results show that both the gel strength and the swelling capacity of the IPN hydrogels were enhanced significantly as compared with those of the pure hydrogels of PDADMAC.

关键词： diallyldimethylammonium chloride Kappa-carrageenan IPN hydrogel radiation synthesis gel strength

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