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以玉米淀粉、水溶性单体丙烯酸(AA)和丙烯酰胺(AM)为原料,环己烷为连续相,N,N′-亚甲基双丙烯酰胺(MBA)为交联剂,过硫酸钾(KPS)作为引发剂,采用反相悬浮聚合法合成淀粉接枝P(AA/AM)高吸水性树脂微球。考察了分散剂种类和用量对聚合体系及树脂吸液性能和平均粒径的影响,研究表明,在淀粉接枝P(AA/AM)反相悬浮聚合体系中,单一分散剂司班80的分散效果最好,且选用复合分散剂的分散效果优于选用单一分散剂,当反应体系分散剂为司班65/司班80复配时,体系的分散性最优。分散剂用量对吸盐水倍率的影响趋势与吸去离子水大致一样,且分散剂用量为6%时都达到最大,有助于吸液速率的提高,随着体系中司班65/司班80分散剂用量的增加,树脂平均粒径趋于变小。
Using corn starch, AA and acrylamide as raw materials, cyclohexane as continuous phase, N, N’-methylenebisacrylamide (MBA) as crosslinking agent, potassium persulfate (KPS) as initiator, the starch grafted P (AA / AM) superabsorbent microspheres were synthesized by reverse phase suspension polymerization. The effects of the type and amount of dispersant on the liquid-absorbent properties and the average particle size of the polymer system were investigated. The results showed that the dispersion of single dispersant class 80 in the starch-grafted P (AA / AM) reversed-phase suspension polymerization system The best effect, and the use of composite dispersant dispersion better than the use of a single dispersant, when the reaction system dispersant for the division 65 / Division 80 compound, the best dispersion of the system. The effect of the amount of dispersant on saline draw ratio is about the same as that of aspirated deionized water, and the amount of dispersant reaches the maximum at 6%, which helps to improve the liquid absorption rate. The amount of dispersant increases, the average particle size of the resin tends to become smaller.