纳米P(AMPS-AANa)吸水树脂的制备.docVIP

本科学生毕业论文 纳米P(AMPS-AANa)吸水树脂的制备 黑 龙 江 工 程 学 院 二一二年六月 The Graduation Thesis for Bachelors Degree Preparation of Nano P (AMPS-AANa) Absorbent Resin Heilongjiang Institute of Technology 2012-06·Harbin 摘 要 高吸水性树脂（SAP）是一种低交联并且具有丰富的亲水基团的功能高分子材料。这种材料的吸水量可能是其本身质量几百倍，几千倍。本论文首先通过反相乳液聚合制备纳米吸水树脂。讨论影响反相乳液体系稳定性及聚合稳定性的因素，确定了稳定聚合的条件。研究了搅拌速率、油水相质量比、乳化剂用量等对纳米吸水树脂粉末平均粒径、粒径分布的影响，得到了制备较小平均粒径和窄粒径分布吸水树脂粉末的条件，即搅拌速率为800r/min油水相质量比2:1Span-80/tween-80复配乳化剂用量为6%，乳化时间为1.5h，丙烯酸溶液的中和度为90%，交联剂、引发剂用量分别为3‰聚合4.5h。在该条件下制备出平均粒径为55nm的P(AMPS-AANa)吸水树脂粉末同时研究了聚合工艺、聚合温度、交联剂用量、引发剂用量、丙烯酸中和度和AMPS的用量对吸水树脂的吸水倍率的影响，聚合工艺不同，吸水倍率不同，吸水倍率随着聚和温度的升高先增大后减小，随交联剂、引发剂的用量、丙烯酸中和度和AMPS用量的增大而下降。另外研究了交联剂用量、AMPS用量对凝胶强度的影响，随交联剂用量或者共聚单体AMPS用量的增加，所得吸水树脂的凝胶强度逐渐增大。关键词: 反相乳液聚合纳米吸水树脂聚苯乙烯吸水倍率 Super absorbent polymer（SAP）is a kind of low cross-linked functional polymer material with abundant hydropilic groups . This kind of materials may absorb water much heavier than its mass, ranging from several hundred times to thousand times. Nano-particles of water absorbent resin were prepared by inverse emulsion polymerization in this thesis. Influences of inverse emulsion polymerization on the stability of the emulsion were discussed and the condition of polymerization was determined. In the inverse emulsion polymerization, affection of stirring rate, weight ratio of oil to water and emulsifier concentration on average particle diameter, particle diameter distribution was studied. Condition of preparing low average particle diameter and narrow particle diameter distribution water-absorbent resin powder was optimized. When stirring rate is 800r/min, weight ratio of oil to water is 2:l, dosage of compound emulsifier is 6%, emulsifing time is 1.5h, and neutralization degree of acrylic acid solution is 90%, both dosage of cross-linking and dosage of initiator are 3‰ and polymerization reaction time is 4.5h, the polymerization condition is optimalized. Water absorbent resin which average particle diameter was 55nm was prepared under this condi