壳聚糖涂布淀粉基复合材料的耐湿热性能

采用热压共混、涂布的方法制备了壳聚糖涂布淀粉基复合材料.红外光谱和扫描电镜研究表明该复合材料有着良好的相容性,壳聚糖溶液与基材间通过氢键作用而形成致密涂层;用两种湿热处理方法研究了该复合材料的耐湿热性能,结果显示,壳聚糖涂布能显著提高材料的耐湿热性能.经水蒸汽熏蒸30 min后,壳聚糖涂布使材料的吸水率从72.5%降低...

Moisture-Thermo-Resistant Properties of Starch-Based Composite Coating with Chitosan

Starch-based composite coating with chitosan was prepared through blend under hot-pressing and coating treatment.The Fourier transform infrared spectrum(FT-IR) and scanning electron microscope(SEM) results show that the blend has a good compatibility,strong hydrogen bond exists between chitosan and other components resulting to form compact coating on the surface of composition.The moisture-thermo-resistant properties of the composite have been researched by two different moisture heat treatment methods.It is indicated that the moisture-thermo-resistant properties obviously improves after coating with chitosan.Coating chitosan can decreases the water absorption from 72.5% to 40.3% and increases the rate of remaining tensile strength from 62.9% to 95.7% after the composites had been treatment in water vapor for 30 min;Coating chitosan also can increases the rate of remaining tensile strength from 15.9% to 39.9% after socked in water of 50 ℃ for 30 min.