摘要
用熔融挤出的方法制备了甘油塑化热塑性淀粉(TPS)聚/乙烯醇(PVA)蒙/脱土(MMT)纳米复合材料,添加蒙脱土和聚乙烯醇用以提高热塑性淀粉材料的力学性能。在相对湿度50%的条件下,复合材料的XRD衍射谱图和透射电子显微镜测试表明,MMT以剥离状态均匀分布在TPS/PVA基体中;力学测试表明,当MMT的质量分数从0%增至5%时,复合材料的力学性能明显提高。当蒙脱土的质量分数为3%时,复合材料最大抗张强度达到13.24 MPa,杨氏模量达到61.46 MPa。这说明蒙脱土在复合材料中可以起到物理交联点的作用,提高了复合材料的力学性能。
Melt extrusion method was adopted to produce thermoplastic starch（TPS）/polyvinyl alcohol（PVA）/montmorillonite（MMT） nanocomposites.The mechanical properties of TPS were improved effectively by adding certain amount of MMT and PVA.Under a relative humidity of 50%,the X-ray diffraction and transmission electron microscopy of the composites showed that MMT was exfoliated and well dispersed in TPS/PVA matrix.Mechanical property test showed that the mechanical property of the composites[w（MMT）=0% to 5%] was obviously improved.The tensile strength of the composite[w（MMT）=3%] reached 13.24 MPa and the Young′s modulus reached 61.46 MPa.This indicates that MMT is likely to play a role of physical crosslinking to improve the mechanical properties of composites.
出处
《应用化学》
CAS
CSCD
北大核心
2011年第7期764-769,共6页
Chinese Journal of Applied Chemistry
关键词
热塑性淀粉
纳米复合材料
蒙脱土
聚乙烯醇
剥离
thermoplastic starch
nanocomposite
montmorillonite
polyvinyl alcohol
exfolated
