N-乙烯基咪唑共聚交联微球的制备及其对二氯苯酚的吸附特性  

Preparation and 2,4-Chlorophenol Adsorption Behavior of Cross-Linked Polyvinylimidazole Microspheres

作　　者：王蕊欣[1] 高保娇[1] 

机构地区：[1]中北大学化学工程系,太原030051

出　　处：《功能高分子学报》2010年第3期275-280,共6页Journal of Functional Polymers

基　　金：山西省青年科技研究基金(2010021008-4);山西省研究生优秀创新基金(20081065)

摘　　要：采用悬浮聚合法,以N-乙烯基咪唑（NVI）为主单体、苯乙烯（St）为共单体、乙二醇二甲基丙烯酸酯（EGDMA）为交联剂、聚乙烯醇（PVA）为分散剂,制备了吸附材料PNVI-St交联微球。重点考察了分散剂用量、搅拌速率、油水两相体积比、交联剂用量、NaCl用量对交联微球的成球性能及粒度的影响规律,研究了该微球对二氯苯酚的静态吸附性能。结果表明：分散剂用量、搅拌速率与油水两相体积比是影响交联微球制备的主要因素,在水相中加入电解质NaCl有助于成球过程,控制悬浮聚合的反应条件,可以制备出球形度好、粒径在100~200μm可调控的交联微球PNVI-St。静态吸附实验结果表明：凭借强烈的氢键相互作用,微球表面的咪唑基团对二氯苯酚具有很强的吸附能力,饱和吸附量可达143 mg/g。Cross-linked polyvinylimidazole microspheres（PNVI-St） were prepared through suspension polymerization using N-vinylimidazole（NVI） as monomer, styrene（St） as comonomer,ethyl glycol dimethacylate（EGDMA） as cross-linker and polyvinyl alcohol（PVA） as dispersant.Effects of various factors such as the amount of the dispersant,cross-linker and NaCl concentration,the stirring rate,the volume ratio of oil phase to water phase on the morphology and size of the cross-linked microspheres were investigated.The adsorption properties of microspheres PNVI-St towards 2,4-dichlorophenol were studied preliminarily.Results show that the amount of the dispersant,the stirring rate and the ratio of oil phase to water phase are key factors.The cross-linked copolymer microspheres PNVI-St with excellent sphericity and controllable particle diameter in a range of 100—200 μm could be obtained.In addition,the adsorption property of microspheres PNVI-St to 2,4-dichlorophenol is excellent,and the static adsorption capacity is 143 mg/g.

关 键 词：聚N-乙烯基咪唑 交联微球 二氯苯酚 吸附 

分 类 号：O631.5[理学—高分子化学]