N,O-羧乙基壳聚糖的合成及对金属离子的吸附性能  

SYNTHESIS AND ADSORPTION PROPERTIES OF N,O-CARBOXYETHYL-CHITOSAN

作　　者：孙胜玲[1] 王爱勤[1] 

机构地区：[1]中国科学院兰州化学物理研究所

出　　处：《高分子材料科学与工程》2006年第3期25-29,共5页Polymer Materials Science & Engineering

基　　金：甘肃省自然科学基金资助项目(ZS021-A25-010-8)

摘　　要：利用壳聚糖与氯丙酸反应,制备了N,O-羧乙基壳聚糖,采用FT-IR、XRD和TGA等手段对其结构进行了表征。结果表明,在N aOH质量分数为15%和反应温度为60℃的条件下,脱乙酰度为90%的壳聚糖与3-氯丙酸(原料比1∶1.5)反应3 h,可制得取代度达0.83的羧乙基壳聚糖。对铜、钴、镍、锌、镉、汞、铅等七种金属离子吸附性能研究发现,羧乙基壳聚糖比壳聚糖有更好的吸附性能。In this paper, an efficient procedure to prepare N, O-carboxyethyl-chitosan （N, O- CE-CTS） was established by the reaction of 3-chloropropionic acid and chitosan. The optimum conditions of the preparation of N, O-CE-CTS were found as follows： 90% DD of chitosan, the mass fraction of sodium hydroxide of 15%, the reaction temperature of 60℃～70℃, the reaction time of 3 h, and the ratio of the raw material （CTS/ClCH2CH2COOH） of 1 ： 1.5. Under these conditions, the degree of substitution （DS） of N,O-CE-CTS reached 0. 83. The chemical structure of N,O-CE-CTS was characterized by FT-IR and XRD, and the thermal properties were analyzed by DSC and TGA. The adsorption properties of N,O-CE-CTS were also investigated. The results reveal that the modified chitosan has good adsorption capacities for metal ions than the chitosan.

关 键 词：壳聚糖 羧乙基壳聚糖 合成 吸附 

分 类 号：O636.1[理学—高分子化学]