蒸汽爆破对蔗渣比表面积及接枝丙烯酰胺的影响

摘要

以蔗渣比表面积为指标，通过单因素实验考查了蒸汽爆破预处理条件如蒸爆压力、保压时间、蔗渣含水率对爆破后蔗渣比表面积的影响。并以蒸爆后的蔗渣为原料，通过接枝共聚合反应制备蔗渣接枝丙烯酰胺，探讨比表面积对蔗渣接枝聚丙烯酰胺接枝率的影响。结果表明，比表面积的增加有助于提高蔗渣接枝丙烯酰胺的接枝率，最佳蒸爆预处理条件为：蒸爆压力2.0 MPa，保压时间60 s，蔗渣含水率25%。%In this paper, the effect of steam explosion pretreatment conditions, such as steam explosion pressure, pressure maintaining time, water content in bagasse, on bagasse specific surface area were investigated through single factor experiment. The bagasse grafting acrylamide was prepared by grafting copolymerization of acrylamide monomer onto the pretreated bagasse, and the effect of surface area of bagasse on the grafting degree were investigated. The results show that the grafting degree is increased with the specific surface area, and the optimized steam explosion pretreatment conditions are as follows: steam explosion pressure of 2.0 MPa, pressure maintaining time of 60 s, bagasse water content of 25%.