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通过季胺化反应合成离子型液体1-丁基,3-甲基氯化咪唑[Bmin]Cl,13C NMR结果表明有效地合成了目标产物。将脱脂棉纤维素溶解于合成的离子液体中,研究讨论了[Bmin]Cl对其溶解性能及溶解前后纤维素的变化。基于自由基聚合反应的原理,使纤维素在[Bmin]Cl中均相与丙烯酰胺接枝共聚,FT-IR证明了接枝产物的生成,凯氏定氮法测量计算得接枝率达60%。正交试验结果表明各因素对接枝率的影响的主次顺序为:引发剂与纤维素的质量比>反应时间>单体与纤维素的质量比>反应温度。
The ionic liquid 1-butyl and 3-methylimidazolium chloride [Bmin] Cl were synthesized by quaternization. The13C NMR results showed that the desired product was synthesized effectively. The cotton wool cellulose was dissolved in the synthesized ionic liquid. The effects of [Bmin] Cl on the dissolution and the changes of cellulose before and after dissolution were discussed. Based on the principle of free-radical polymerization, cellulose was grafted with acrylamide in homogeneous phase in [Bmin] Cl. FT-IR proved the formation of grafting product. The Kjeldahl method was used to calculate the grafting yield %. Orthogonal test results show that the order of the main factors affecting the grafting rate is: mass ratio of initiator to cellulose> reaction time> mass ratio of monomer to cellulose> reaction temperature.