菜籽粕-g-聚(甲基丙烯酸甲酯-co-丙烯酸丁酯)复合高吸油树脂的制备及其性能

Preparation and Properties of RSM-g-P(MMA-co-BA) High Oil Absorbent Resin

以菜籽粕(RSM)为基材、甲基丙烯酸甲酯(MMA)和丙烯酸丁酯(BA)为单体、过氧化苯甲酰(BPO)为引发剂、N,N′-亚甲基双丙烯酰胺(MBA)为交联剂进行接枝共聚合成了RSM-g-P(MMA-co-BA)复合高吸油树脂,对该树脂进行了SEM和FTIR表征,考察了RSM,BPO,MBA的用量及单体配比对吸油率的影响,并对其吸油动力学进行了探讨。实验结果显示,所制备的树脂是RSM与MMA-BA的表面交联型复合物,RSM起到骨架填充作用。合成该树脂的最佳条件为:m(BA)∶m(MMA)=2∶1,w(BPO)=0.7%(基于树脂的质量,下同),w(MBA)=0.04%,w(RSM)=3.2%,反应温度70℃,反应时间1.0 h。室温下,该树脂对三氯甲烷、二氯甲烷、甲苯、邻二甲苯以及乙酸乙酯的最大吸油率分别为41.0,34.9,25.2,23.9,20.5g/g,平衡吸油时间约60 min。吸油过程符合准二级动力学模型,吸油速率的快慢顺序为:甲苯>二氯甲烷>乙酸乙酯>三氯甲烷>邻二甲苯。

The RSM-g-P（MMA-co-BA） resins with high oil absorbency were synthesized through copolymerization from rapeseed meal（RSM）,methyl methacrylate（MMA） and butyl acrylate（BA） with benzoyl peroxide（BPO） as initiator andN,N′-methylenebisacrylamide（MBA） as cross-linking agent, and characterized by means of SEM and FTIR. The effects of reaction conditions on the oil absorbency of RSM-g-P（MMA-co-BA） and the absorption kinetics were investigated. The results showed that the co-monomers（MMA and BA） were grafted onto the surface of RSM which acted as skeleton in the resins. Under the optimal reaction conditions ofm（BA）∶m（MMA） 2∶1,w（BPO） 0.7%,w（MBA） 0.04%, w（RSM） 3.2%（based on the mass of the resins）,70℃ and 1.0 h,the oil absorbencies of RSM-g-P（MMA-co-BA） at room temperature for chloroform,dichloromethane,toluene,o-xylene and ethyl acetate were 41.0,34.9,25.2,23.9 and 20.5 g/g,respectively. The saturated oil absorption could be reached within about 60 min. The absorption kinetics experiments showed that a pseudo-second-order kinetic equation was suitable for the simulation of the adsorption processes and the order of the oil absorption rates was toluene〉dichloromethane〉ethyl acetate〉chloroform〉o-xylene.