纤维素-g-p(4Vp/MBA)共聚物均相制备及应用研究

The preparation and application of cellulose graft poly(4-vinyl pyridine/butyl methacrylate)

以离子液体为溶剂溶解纤维素,在均相条件下4-乙烯基吡啶(4Vp)与甲基丙烯酸丁酯(BMA)为接枝单体,过硫酸铵为引发剂,N,N-亚甲基双丙烯酰胺为交联剂,通过均相自由基聚合制备了纤维素-g-P(4Vp/MBA)共聚物。利用FT-IR对其结构进行了表征。考察了单体用量、聚合温度、聚合时间、交联剂用量、引发剂用量对接枝效果的影响,以及不同接枝共聚物对酚类、金属离子的吸附效果。结果表明,双功能单体的接枝不仅可以增加纤维素接枝共聚物接枝效率,而且对2,4-DCP和金属离子均有较好的吸附效果,对2,4-DCP吸附容量为798.8mg/g,对金属离子Cu2+、Pb2+、Cd2+吸附容量分别达到41.27、31.27和22.93mg/g。

The cellulose was grafted homogeneously with 4-vinyl pyridine （4Vp） and butyl methaerylate （BMA） through radical polymerization in ionic liquid 1-allyl-3-methylimidazolium chloride （AMIMCI） as reaction medi- um. APS was used as the initiator in the preserme of a cross-linker MBA. The structure of the cellulose graft poly（4-vinyl pyridine/butyl methacrylate） copolymers were characterized by means of FT-IR. The effects of the graft copolymerization conditions, namely temperature, reaction period, the dosage of APS and MBA, and the mass ratio of monomers on the grafting ratio were investigated. These resulting copolymers were shown to be have as good sorbents for Cu（ Ⅱ ）, Pb（ Ⅱ ）, Cd（Ⅱ ） ions and 2,4-dichorophenol （2,4-DCP）. The maximum ad sorption capacity of Cu（ Ⅱ ）, Pb（Ⅱ）, Cd（Ⅱ） ions and 2,4-DCP were found to be 798.8, 251.9, 41.27, 31.27 and 22.93 mg/g, respectively.