基于体积拉伸流场的TPS/OMMT纳米复合材料制备及性能研究  

Study on Properties of TPS/OMMT Nanocomposites Prepared by Volume Elongation Flow Field

作　　者：赵明亮[1] 瞿金平[1] ZHAO Ming-ling;QU Jin-ping(The Key Laboratory of Polymer Processing Engineering of Ministry of Education,National Engineering Research Center of Novel Equipment for Polymer Processing,Guangdong Provincial Key Laboratory of Advanced Polymer Manufacturing Technology and Equipment,Guangzhou 510640,China)

机构地区：[1]华南理工大学聚合物成型加工工程教育部重点实验室,聚合物新型成型装备国家工程研究中心,广东省高分子先进制造技术及装备重点实验室,广东广州510640

出　　处：《塑料工业》2021年第3期44-49,共6页China Plastics Industry

摘　　要：通过基于体积拉伸流场作用为主的双轴偏心转子挤出机制备了热塑性淀粉(TPS)和TPS/有机蒙脱土(OMMT)纳米复合材料,并研究了TPS/OMMT纳米复合材料的微观结构、力学性能、热稳定性及耐水性能。结果表明,在甘油和拉伸流场的协同作用下,OMMT片层间距增加,并均匀分散在塑化良好的TPS基体中。低含量时,OMMT在TPS/OMMT纳米复合材料形成剥离结构,高含量时OMMT主要以插层结构存在;与TPS相比,TPS/OMMT纳米复合材料的力学性能,热稳定性,耐水性有明显提升。其中,拉伸强度最大提升幅度为43.8%;初始降解温度最大提升幅度为20.1℃;接触角最大提升幅度为25.7°。The thermoplastic starch(TPS)and TPS/organic montmorillonite(OMMT)nanocomposites with different OMMT loading were manufactured via an intense volume pulsating elongation flow.The micromorphology,thermostability,mechanical properties,and water resistance of TPS/OMMT nanocomposites were investigated.Under the synergistic effect of glycerin and the strong extensional flow field,the interlayer spacing of OMMT dramatically increased and it was well dispersed in the native starch which was completely plasticized.The OMMT was well exfoliated and intercalated in the nanocomposites with low and high content filling,respectively.Comparing with the pure TPS,the mechanical property,thermal stability,and water resistance of the blend increased significantly in TPS/OMMT nanocomposites.The maximum increases in tensile strength,initial degradation temperature T 5,and contract angle were 43.8%,20.1℃,and 25.7°,respectively.

关 键 词：双轴偏心转子挤出机 体积拉伸流场 热塑性淀粉 有机蒙脱土 纳米复合材料 

分 类 号：TQ327.8[化学工程—合成树脂塑料工业]