摘要
本文研究了H2O2-HAc控制氧化制备壳寡糖的适宜工艺条件,合成了三种不同聚合度(分子量分别为78万、11万和1万)的壳聚糖,进而优化了与亚铁配位的条件,得到了三种壳聚糖亚铁配合物,同时分别研究了它们对尿素的吸附性能,并与其它不同尿素吸附材料做了比较,结果表明,壳聚糖亚铁配合物对尿素具有较高的吸附容量和较高的选择性,在pH值为5.5、尿素的初始浓度为1.5mg/ml时,其吸附容量为60.90mg/g,明显高于其它材料,略低于乙烯多胺-Cu(II)配合物的吸附容量,但鉴于壳聚糖优良的生物活性和医用性能,仍不失为一种高效新型尿素吸附剂材料。
The optimum preparation craft of the different low-molecular weights chitosan was studied by H2O2-HAc control oxidation method. It synthesized three kind of chitosan with different low molecular weight(MW 780000、110000 and 10000 respectively) and obtained a series of their ferrous complexes by optimizing the coordinate conditions between low-molecular chitosan and ferrous complexes. The optimal adsorption conditions of urea with different molecular weight chitosan-Fe(II) complexs were studied. It resulted that the complexes exhibited high sorptive capacity and good selectivity for urea.The sorption capacity was affected by the metal content in the complexes,time of sorption, concentration of urea etc.The sorption capacity was found 60.90mg/g for urea by the chitosan metal complexes at pH 5.5 and the concentration of urea being l.5mg/ml. The adsorption capability of urea on chitosan-Fe(II) complexs was higher than other materials and slightly less than polyacrylic acid resin-Cu(II) complexes. Yet chitosan-Fe(II) complexs could still be regarded as a new kind of high efficiency urea adsorbent material in view of the excellent biological character and medical function of the chitosan and their complexes.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2005年第3期31-34,共4页
Food Science
基金
陕西省科委自然科学基金项目(01H10
02B09)