摘要
研究了用60Coγ射线辐射引发反相悬浮聚合法制备淀粉-丙烯酸钠高吸水树脂的工艺条件,讨论了吸收剂量、吸收剂量率、反应物配比、交联剂用量、单体中和度等不同反应条件对共聚物吸水性能的影响.结果表明,采用本法制备的高吸水树脂可吸去离子水约760mL/g,自来水约200mL/g,0 9%(w)NaCl约55mL/g,吸液速率较快,6min内可达吸液饱和,压力下保水性能良好.
A high water-absorption resin, starch-sodium acrylate copolymer ,was prepared by γ-ray irradiation-initiated graft copolymerization by reversed-phase suspension way. The effect of reaction condition, e.g., irradiation dose, irradiation dose rate, the mass ratio of reactants, the degree of monomer neutralization and the concentrations of crosslinking agents on absorbency in deionic water of polymer were discussed. The results showed that the appropriate conditions should be as follows: the mass ratio of acrylic acid to starch ≈3.5∶1.0, the degree of neutralization ≈80%, the mass fraction of N,N' -methylene -bis- acrylamide ≈0.04%, and the irradiation dose ≈2.8 kGy. The deionized water absorption of the resin was about 760 mL/g, the tap water absorption of the resin was about 200 mL/g, and the NaCl 0.9% (w) absorption of the resin was about 55 (mL/g.) The speed of water absorption was high and the water-holding power under pressure was great.
出处
《华南农业大学学报》
CAS
CSCD
北大核心
2004年第2期111-114,共4页
Journal of South China Agricultural University
基金
广东省科技计划农业攻关项目资助(2002C20806)
