摘要
以壳聚糖为原料,在碱性条件下与氯乙酸反应,合成了具有良好水溶性的羧甲基壳聚糖。以合成的水溶性羧甲基壳聚糖和丙烯酸为原料,通过接枝共聚反应合成了具有一定抑菌性能的羧甲基壳聚糖接枝聚丙烯酸高吸水树脂。探讨了羧甲基壳聚糖的合成条件,研究了羧甲基壳聚糖用量对树脂吸水性能和抑菌性能的影响。结果表明,当碱与壳聚糖的质量比为6∶1,氯乙酸与壳聚糖的质量比为5.5∶1时,羧甲基壳聚糖的产率和取代度均较高,在水中的水溶性较好;在相同的合成条件下,当羧甲基壳聚糖用量为丙烯酸质量的1.80%时,树脂具有较高的吸水性能及良好的抑菌性能,且均优于壳聚糖接枝聚丙烯酸高吸水树脂,其吸水倍率为980 g/g,对大肠杆菌和金黄色葡萄球菌均有抑制其生长的作用,抑菌率分别为91.7%和70.6%。
The carboxymethyl chitosan which had good water-solubility was synthesized by the reaction between chitosan and chloroacetic acid under alkaline condition. After that, a series of carboxymethyl chitosan graft poly （ acrylic acid ） superabsorbent resins which had antibacterial activity were synthesized by graft polymerization between carboxymethyl chitosan and acrylic acid. The synthesis conditions of carboxymethyl chitosan were investigated, the effects of carboxymethyl chitosan content on the water absorbency and antibacterial activity of the superabsorbent resins were studied. The result showed that when the mass ratio of alkali to carboxymethyl chitosan was 6：1 and the mass ratio of chloroacetic acid to carboxymethyl chitosan was 5.5： 1, the carboxymethyl chitosanthe had good yield and degree of substitution. Under the same conditions of synthesis, when the content of carboxymethyl chitosan was 1.8% of acrylic acid mass, the superabsorbent resin had better water absorbency and antibacterial activity, moreover, which were higher than chitosan graft poly （ acrylic acid ） superabsorbent resin. The water absorbent rate of the superabsorbent resin was 980 g/g. The superabsorbent resin was inhibitory to the growth of escherichia coli and staphylococcus aureus, bacteriostasis rate was 91.7% and 70.6% respectively.
出处
《工程塑料应用》
CAS
CSCD
北大核心
2012年第9期4-8,共5页
Engineering Plastics Application
基金
福建省自然科学重点项目基金(2007T010)
关键词
羧甲基壳聚糖
高吸水树脂
吸水性
抑菌性
carboxymethyl chitosan
superabsorbent resin
water absorbency
antibacterial activity
