可生物降解羧甲基纤维素/壳聚糖吸水保水材料的制备与表征

Preparation and Characterization of Water Retention Absorbent of Carboxymethyl Cellulose/Chitosan Composite

用溶液共混及冷冻干燥法制备了不同比例的羧甲基纤维素/壳聚糖(CMC/CS)吸水保水复合材料。用X射线衍射(XRD)、红外光谱(IR)和扫描电镜(SEM)对复合材料进行了表征,并对复合材料的吸水保水能力、吸水速率和重复使用性能进行了测试。结果表明,复合材料两组分间有很好的相容性,二者发生了一定的相互交联作用;在不同组分比例的复合材料中,当CMC/CS比例为9/1时其吸水率最高,为(6676.0±50.2)%,其吸水速度极快,且具备优异的保水性能。

Water retention absorbents of carboxymethyl cellulose/chitosan （CMC/CS） composite with different weight ratios were prepared by the method of co-solution combined with freeze-drying. The morphology and properties of the composites were characterized by scanning electron microscope （SEM）,X-ray diffraction （XRD） and infrared spectroscopy （IR）. In addition,the absorption rate,water absorption,and retention capacity of the composite were also investigated. The results show that there are strong chemical interactions of ionic cross-linking between CMC and CS. When the CMC/CS mass ratio is 9/1,the composite has the highest water absorption ratio of （6676.0±50.2）%,and also exhibits the excellent water retention. So the composite will be expected to be widely used in the industrial and agricultural fields.