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Preparation and Flocculation Behavior of Cellulose-g-PMOTAC Copolymer

机译:纤维素-g-PMOTAC共聚物的制备及絮凝行为

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As a contribution to the wider use of biodegradable materials, this article reports the synthesis and testing of cationic polyelectrolyte cellulose derivatives for use as flocculation chemicals. Cellulose macroinitiator is synthesized in DMAc/LiCl solvent system by direct acylation of cellulose with 2-bromoisobutyryl bromide. Cellulose-graft-poly(N,N-dimethyl aminoethyl methacrylate) (cellulose- g-PDMAEMA) copolymers are prepared by copper-mediated radical polymerization in homogeneous medium. Formation of the macroinitiator and graft copolymers is confirmed by ATR-FTIR and ~1H NMR. Quaternization of the graft chains to poly(methacryloxyethyl trimethylammonium chloride) (PMOTAC) produces cellulose-g-PMOTAC, which performs similarly to a commercial product in flocculation of pulp and kaolin.
机译:为了更广泛地使用可生物降解材料,本文报道了用作絮凝化学品的阳离子聚电解质纤维素衍生物的合成和测试。纤维素大分子引发剂是在DMAc / LiCl溶剂系统中,通过将纤维素与2-溴异丁酰溴直接酰化而合成的。纤维素-接枝-聚(甲基丙烯酸N,N-二甲基氨基乙基酯)(纤维素-g-PDMAEMA)共聚物是通过铜介导的自由基聚合反应在均质介质中制备的。大分子引发剂和接枝共聚物的形成通过ATR-FTIR和〜1H NMR确认。将接枝链季铵化为聚(甲基丙烯酰氧基乙基三甲基氯化铵)(PMOTAC)可产生纤维素-g-PMOTAC,其在纸浆和高岭土的絮凝中的性能类似于市售产品。

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