链转移剂对ST-AA-AM吸水剂吸水性能的影响  

Effect of Chain Transfer Agents on the Water Absorbency of ST-AA-AM Absorbent

作　　者：郭佳[1] 刘明华[1] 林春香[1] 

机构地区：[1]福州大学环境与资源学院,福建福州350108

出　　处：《广州化学》2012年第1期1-6,共6页Guangzhou Chemistry

基　　金：国家级国际合作重点项目(2009DFA61680)

摘　　要：分别以抗坏血酸、甲酸、亚硫酸氢钠、异丙醇为链转移剂,研究了不同的链转移剂对淀粉―丙烯酸―丙烯酰胺(ST-AA-AM)吸水剂吸水性能的影响。实验结果表明:异丙醇、甲酸、亚硫酸氢钠、抗坏血酸用量分别为单体总质量的0.0375%、0.045%、0.075%、0.01%时,吸水率分别为498.1 g/g、347.9 g/g、549.0 g/g、407.7 g/g。将链转移剂进行复配,亚硫酸氢钠与异丙醇复配的效果最佳,当复合链转移剂用量占单体总质量的0.08%,异丙醇/亚硫酸氢钠(质量比)=1∶2时,吸水剂的吸水率最高,为653.5 g/g。Ascorbic acid,formic acid,isopropanol,sodium bisulfite were chosen as chain transfer agents in the preparation of copolymer absorbent of starch-acrylic acid-acrylamide.The effect of different chain transfer agents on the water absorbency was studied.The results indicated that the water absorbency of the product could be improved in the presence of the chain transfer agents.The results concluded that under the otherwise identical conditions when the dosages of isopropanol,formic acid,sodium bisulfite and ascorbic acid were 0.0375%、0.045%、0.075% and 0.01%,the water absorption percentage could reach 498.1,347.9,549.0 and 407.7 g/g respectively.Additionally,the water absorption percentage from the compound chain transfer agents prevailed over the single one.The optimal compound chain transfer agent was the mixture of isopropanol and sodium bisulfite.When the mass ratio of isopropanol and sodium bisulfite was 1∶2 and the dosage of the compound chain transfer agent was 0.08%,the water absorption percentage could reach 653.5 g/g.

关 键 词：链转移剂 吸水性能 淀粉-丙烯酸―丙烯酰胺共聚物 超强吸水剂 

分 类 号：TQ317.3[化学工程—高聚物工业]