交联壳聚糖微球对喹乙醇吸附性能的研究

以壳聚糖为原料,乙酸乙酯为致孔剂,环氧氯丙烷为交联剂,通过交联法制备出改性壳聚糖,考察了交联壳聚糖微球对喹乙醇吸附的影响。结果表明,V(壳聚糖)∶V(乙酸乙酯)∶V(环氧氯丙烷)=30∶1∶1时,制备的交联壳聚糖微球对喹乙醇吸附性能较好;红外光谱表明,环氧氯丙烷与壳聚糖发生反应;扫描电镜分析验证环氧氯丙烷用量对交联壳聚糖微球吸附性能有一定影响;吸附动力学曲线得知交联壳聚糖微球在3 h对喹乙醇吸附达到平衡,有较好的吸附速度;与类似物(喹烯酮和乙酰甲喹)吸附特性比较得知,交联壳聚糖微球对喹乙醇有较好的选择吸附性。

Study on the adsorption property of the modified chitosan for Olaquindox

Modified chitosan was prepared with chitosan, ethyl acetate, and epichlorohydrin at ratio of 30:1:1(v/v). This prepared material was evaluated by FT-IR spectra, SEM images, and UV spectra analysis. FT-IR spectra results indicated that epichlorohydrine might have reacted with chitosan and the modified chitosan had been formed. SEM image analysis showed that the addition of epichlorohydrine had important effect on the crystallinity. The adsorption test indicated that the modified chitosan exhibited a faster kinetics for the adsorption and desorption of olaquindox in 3 hours; modified chitosan offered higher selectivity and adsorption capacity toward olaquindox than that of structurally related compounds.