以甘蔗渣为原料,采用均相接枝共聚制备了甘蔗渣纤维素/甲基丙烯酸甲酯(MMA)接枝共聚物,考察了接枝共聚物作为吸油材料的保油性能并对吸附条件进行了优化,研究了用质量分数1% NaOH预处理后的甘蔗渣纤维素在离子液体中的溶解过程以及接枝共聚物的吸附机理和吸附动力学。结果表明,甘蔗渣纤维素在离子液体中的溶解是非衍生化的直接溶解;在温度15℃、振荡频率96r/min的条件下,甘蔗渣纤维素/MMA接枝共聚物对机油的吸附量最高可达27.51g/g,保油率最高可以达到80.90%。甘蔗渣纤维素/MMA接枝共聚物的吸附行为更适合用准二级动力学吸附方程描述,且吸附属于化学吸附。
Natural oil absorbing materials were prepared by homogeneous graft copolymerization,with bagasse as raw material.The oil retention property of bagasse cellulose/methyl methacrylate(MMA) copolymer was analyzed,and optimized the oil absorption conditions from the perspective of properties.The dissolution process of bagasse cellulose pretreated with mass fraction of 1% NaOH in ionic liquid was studied according to the characterization results.The adsorption mechanism and kinetics of the prepared material were studied theoretically.The results showed that the dissolution of bagasse cellulose in ionic liquid was non-derivatived direct dissolution.Under the optimal conditions:temperature of 15℃,oscillator frequency of 96r/min,bagasse cellulose/MMA copolymer could have the best adsorption capacity of 27.51g/g.The oil retention rate of the prepared material could reach a maximum value of 80.90%.It was belonged to chemical adsorption,which was more suitable to be described by quasi-second order kinetics.
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基金资助
全国农业教指委课题(2019-NYYB-27);中国学位与研究生教育学会农林学科工作委员会课题(2019-NLZX-YB24)
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