壳聚糖涂布淀粉基复合材料的耐湿热性能  

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

作　　者：林宝凤[1,2] 黎演明[1] 周妤莲[1] 李磊[1] 杜予民[2] 

机构地区：[1]广西大学化学化工学院,广西南宁530004 [2]武汉大学资源与环境科学学院,湖北武汉430079

出　　处：《高分子材料科学与工程》2011年第5期75-77,81,共4页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(50263001)

摘　　要：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%降低至40.3%,拉伸强度保留率由62.9%提高至95.7%。经50℃水浸泡30 min后,壳聚糖涂布使材料的拉伸强度保留率由15.5%提高至39.9%。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.

关 键 词：壳聚糖 淀粉基复合材料 涂布 耐湿热性能 

分 类 号：O636.1[理学—高分子化学]