PLA/埃洛石纳米管复合材料制备与性能
高金玲1，李媛1，苏似鑫2，张绮琪2，成裕强2，陈金伟2
1.武汉华夏理工学院智能制造学院，武汉 430223； 2.广东轻工职业技术学院轻化工技术学院，广州 510300
Preparation and Properties of PLA/Halloysite Nanotubes Nanocomposites
Gao Jinling1, Li Yuan1, Su Sixin2, Zhang Qiqi2, Cheng Yuqiang2, Chen Jinwei2
1. Technology School of Intelligent Manufacturing, Wuhan Huaxia University, Wuhan 430223, China; 2. School of Light Chemical Technology, Guangdong Industry Polytechnic, Guangzhou 510300, China
摘要：采用硅烷偶联剂改性埃洛石纳米管，通过熔融共混法制备了聚乳酸/改性埃洛石纳米管(PLA/m-HNTs)纳米复合材料，研究了m-HNTs含量对PLA/m-HNTs纳米复合材料微观结构、结晶行为、流变性能以及力学性能的影响规律。结果表明，当m-HNTs质量分数不高于2%时，m-HNTs能够均匀分散在PLA基体中。m-HNTs能够有效促进PLA的结晶能力，提高了PLA/m-HNTs纳米复合材料的熔点和结晶度，但晶型未改变仍为α晶。PLA/m-HNTs复合材料的黏度呈现“剪切变稀”行为，并且剪切黏度随m-HNTs含量呈现出先增加后降低的变化趋势。PLA/m-HNTs复合材料的拉伸强度和断裂伸长率随m-HNTs含量的增加呈现先增加后降低的变化趋势，缺口冲击强度呈现出与拉伸性能同样的变化趋势，当m-HNTs质量分数为2 %时，复合材料的缺口冲击强度达到最大值3.5 kJ/m2。
Abstract：Silane coupling agent was used to modify halloysite nanotubes (HNTs) and polylactic acid/modified halloysite nanotubes (PLA/m-HNTs) nanocomposites were prepared by melt blending. The effects of m-HNTs content on the microstructure, crystallization behavior, rheological and mechanical properties of PLA/m-HNTs nanocomposites were investigated. The results show that m-HNTs can be dispersed in the PLA matrix uniformly when the mass fraction of m-HNTs is not more than 2%. Crystallization ability of PLA is improved effectively by the addition of m-HNTs, and the melting point and crystallinity of PLA/m-HNTs nanocomposites are increased while the crystal form is still α crystal without change. The viscosity of PLA/m-HNTs composites show a shear thinning behavior, and the shear viscosity increases firstly and then decreases with the increase of m-HNTs content. The tensile strength and elongation at break of PLA/m-HNTs composites show a tendency to increase firstly and then decrease with the increase of m-HNTs content. The impact strength shows the same trend as the tensile properties. When the content of m-HNTs is 2wt%, the impact strength of PLA/m-HNTs composites reaches the maximum value of 3.5 kJ/m2.
关键词：聚乳酸；埃洛石纳米管；硅烷偶联剂；微观结构；性能
Keywords：polylactic acid; halloysite nanotubes; silane coupling agent; microstructure; property
基金：2019年度广东省普通高校特色创新类项目(2019GKTSCX014)，2020年佛山市深入推进创新驱动助力工程项目(2020024)，广东轻工职业技术学院2017年拔尖人才自选项目(152241202)，2019年福建工程学院重点科研创新平台开放基金项目(KF-C19004)
本文引用格式：
高金玲，李媛，苏似鑫，等. PLA/埃洛石纳米管复合材料制备与性能[J].工程塑料应用，2020，48(12)：21-26.
Gao Jinling，Li Yuan，Su Sixin，et al. Preparation and properties of PLA/halloysite nanotubes nanocomposites[J]. Engineering Plastics Application，2020，48(12)：21-26.
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