铈离子引发纤维素接枝甲基丙烯酸丁酯制备吸油材料的制备

以棉浆粕为基材，硝酸铈铵/HNO3为引发剂，甲基丙烯酸丁酯(BMA)为接枝单体，N ,N'-亚甲基双丙烯酰胺为交联剂，采用悬浮震荡接枝聚合反应制备了纤维素基吸油材料。采用红外光谱、X射线衍射、扫描电镜、热重分析、差示量热等手段对产物结构进行了表征，考察了棉浆粕的引发及其后的接枝聚合反应，得到最佳工艺条件为：采用含有铈离子的0.15 mol/L的HNO3水溶液在45 ℃下将棉浆粕活化处理2.5 h后,在HNO3水溶液及交联剂存在下，与BMA发生接枝聚合反应；反应配比为纤维素/引发剂/单体/交联剂=1/0.03/1.5/0.03，聚合反应温度为50 ℃，反应时间为24 h。所得纤维素与BMA的接枝共聚物有较高的接枝率及理想的吸油性能。

Preparation of Cellulose Grafted Butyl Methacrylate Oil Absorbing Resins Initiated by Ceric Ion

Cellulose based oil absorbing resins were prepared via grafting cotton pulp with poly(butyl methacrylate), and were characterized using FTIR, XRD, SEM, TG, and DSC. Effects of the pre-process of the base cotton pulp and the condition of graft copolymerization were investigated, the found optimal preparation procedure was: the cotton pulp was first activated with a 0.15mol/LHNO3 solution containing ceric ion at 45℃ for 2.5h, then grafted with butyl methacrylate at 50℃ for 24h in presence of a crosslinker N,N′-methylene-bis-acrylamide. The weight ratios of cellulose/ initiator /monomer/ crosslinker should be 1/0.03/1.5/0.03. Based above conditions, high graft rates could be reached and resulting in excellent oil-absorbing property.