作　　者： ; ; ; ;

机构地区： 广西大学化学化工学院

出　　处： 《广西大学学报（自然科学版）》 2009年第4期505-508,512,共5页

摘　　要： 为了制备一种亲水性有机膨润土,以壳聚糖为改性剂,先把钠基膨润土高度分散到水中,然后慢慢加入到壳聚糖溶液中进行离子交换反应得到壳聚糖膨润土。以壳聚糖膨润土的有机化程度为考察目标,通过单因素实验考察了制备工艺条件的影响,并使用XRD、DSC对产物进行了结构表征。结果表明,4.0 g钠基膨润土在反应温度为60℃下与浓度为0.04 g.mL-1的200 mL壳聚糖溶液反应时间24 h,得到有机含量达到27.6%的壳聚糖膨润土。XRD表明,壳聚糖膨润土仍保留蒙脱石结构,其层间距为1.79 nm;DSC表明壳聚糖膨润土中壳聚糖基团热稳定性明显高于壳聚糖。将该材料添加入明胶中,明胶的抗压强度提高可提高34%。壳聚糖膨润土的开发对膨润土和甲壳素资源的开发具有重要的意义。 In order to prepare a hydrophilic organic was dispersed into the water, and then slowly added bentonite, chitosan as a modifier, Na-bentonite to the chitosan solution for ion exchange reaction. Organic degree of CS-MMT was studied by the single factor experiment. XRD and DSC were used to characteried the structural of CS-MMT. In the case of reaction temperature 60℃, reaction time 24 h, reaction concentration of CS 0.04 g · mL^- 1, the CS dosage was 200 mL got the result of organic degree 27.6%. XRD implied that Chitosan-Montmorillonite structure was retained and the layer distance of CS-MMT was 1.79 nm. DSC showed that the thermal stability of chitosan group in CS-MMT was higher than that of chitosan. The gelatin that added CS-MMT can improve the compressive strength by 34%. The development of CS-MMT has great significance for the development of bentonite and chitin.

关 键 词： 壳聚糖膨润土 制备 表征 明胶 抗压强度

领　　域： [一般工业技术]