MMT对明胶壳聚糖复合材料吸/放湿性能的影响

Influence of MMT on the moisture adsorption/desorption properties of gelatin chitosan/MMT composite

采用乳化-交联法制备了明胶壳聚糖/蒙脱土(MMT)复合材料,考察了MMT对复合材料吸/放湿性能的影响。通过吸湿性能、放湿性能、粒径、扫描电镜、透射电镜和红外光谱等手段表征了复合材料的性能与结构。结果表明:MMT被成功引入到复合材料中,且MMT引入后复合材料微球的表面变得不光滑,在明胶中引入MMT所得的复合材料微球表面出现层状结构。MMT的引入可以增加复合材料的吸湿性能,明胶中引入MMT后复合材料的吸湿率优于壳聚糖中引入MMT,当MMT/明胶为0.05/1时,复合材料吸湿率和放湿率较大、放湿时间短,具有较好的吸/放湿性能,说明其综合调湿性能最优。

Gelatin/chitosan/MMT composites were prepared by emulsion-crosslinking method.The effect of MMT on the adsorption/desorption of moisture of the composites was investigated.The properties and structures of the composites were studied by moisture adsorption/desorption,particle size,SEM and TEM.The results shown that the MMT was successfully introduced into the composite by FT-IR.SEM and TEM showed that the surface of the microspheres was not smooth after the introduction of MMT.The surface of the microspheres with MMT in gelatin showed a layered structure.The moisture adsorption can be improved by MMT.The moisture adsorption rate of the composite with MMT in gelatin was higher than that of the composite with MMT in chitosan.The composites exhibited high moisture adsorption and desorption rate,short desorption time when the mass ratio of MMT to gelatin was 0.05 to 1,indicating agood moisture adsorption/desorption and comprehensive moisture regulation performance.