壳聚糖-丙烯酰胺-二甲基二烯丙基氯化铵接枝共聚物的辐射制备  

Irradiation preparation of chitosan-AM-DMDAAC graft copolymer

作　　者：王晓慧[1] 遆永周[1] 李灿然[1] 吕晓华[1] 黎振华[1] 董明静[1] 

机构地区：[1]河南省科学院同位素研究所有限责任公司,郑州450015

出　　处：《辐射研究与辐射工艺学报》2015年第4期32-38,共7页Journal of Radiation Research and Radiation Processing

摘　　要：采用γ-射线辐照法,以壳聚糖、丙烯酰胺(AM)和二甲基二烯丙基氯化铵(DMDAAC)为原料制备了壳聚糖-AM-DMDAAC接枝共聚物。考察了吸收剂量、单体AM与DMDAAC重量比、壳聚糖与总单体重量比、反应物浓度等因素对接枝共聚反应的影响。结果表明,随着吸收剂量的增大,接枝率和阳离子度上升,而接枝效率变化不大,吸收剂量为4 k Gy时最佳,接枝率、接枝效率和阳离子度分别为210.9%、96.1%和26.9%;接枝率和接枝效率随着AM与DMDAAC重量比的增加而提高,当AM与DMDAAC重量比为7:3时达到最大值,分别为182.6%和98.8%;随着壳聚糖与总单体重量比的降低,接枝率、接枝效率和阳离子度逐渐增加,当壳聚糖与总单体重量比为3:8时,其值分别为182.5%、94.9%和25.5%,接枝效果最好;接枝率、接枝效率和阳离子度随着反应物浓度的降低先上升后降低,醋酸最佳用量为100 m L。Chitosan-AM-DMDAAC（Acrylamide, AM; diallyl dimethyl ammonium chloride, DMDAAC） graft copolymer was synthesized by γ-ray irradiation using chitosan, AM and DMDAAC. The effect of reaction conditions on graft copolymer were studied, including absorbed dose, monomer AM and DMDAAC weight ratio, chitosan and total monomers weight ratio, as well as reactant concentration. The results showed that grafting ratio, cationic degree and grafting ratio of DMDAAC increased with the absorbed dose, however, the graft efficiency changed little, and the optimal absorbed dose was 4 kGy. The values of grafting ratio, grafting efficiency and cationic degree were 210.9% 96.1% and 26.9% respectively; the grafting ratio and the grafting efficiency increased with the AM and DMDAAC weight ratio; when AM and DMDAAC weight ratio is 7：3, they reached maximum values that were 182.6% and 98.8% respectively; the grafting ratio, cationic degree and grafting ratio of DMDAAC increased with the decreasing of chitosan and total monomers weight ratios, and grafting result was the best when chitosan and total monomers weight ratio was 3：8. The values of grafting ratio, grafting efficiency and cationic degree were 182.5%, 94.9% and 25.5% respectively; the grafting ratio, cationic degree and grafting ratio of DMDAAC increased first and then decreased with the decreasing of reactant concentrations, and the optimum amount of acetic acid was 100 mL .

关 键 词：壳聚糖 二甲基二烯丙基氯化铵 丙烯酰胺 接枝共聚 γ-射线辐照 

分 类 号：TL13[核科学技术—核能科学]