PLA/PBAT/竹粉可降解复合材料的制备及性能  

Preparation and Properties of Bamboo Powder/PLA/PBAT Degradable Composites

作　　者：李敏文 黄静旭 李知函 胡灿 LI Minwen;HUANG Jingxu;LI Zhihan;HU Can(College of Packaging and Materials Engineering,Hunan University of Technology,Zhuzhou Hunan 412007,China;College of Materials Science and Engineering,Central South University of Forestry and Technology,Changsha 410004,China;Liling College of Ceramics,Hunan University of Technology,Zhuzhou Hunan 412299,China)

机构地区：[1]湖南工业大学包装与材料工程学院,湖南株洲412007 [2]中南林业科技大学材料科学与工程学院,湖南长沙410004 [3]湖南工业大学醴陵陶瓷学院,湖南株洲412299

出　　处：《包装学报》2024年第6期1-9,共9页Packaging Journal

基　　金：湖南省重点研发计划项目(2023GK2040);湖南省教育厅科学研究基金资助项目(22C0306)。

摘　　要：以可降解聚合物聚乳酸(PLA)和聚己二酸/对苯二甲酸丁二酯(PBAT)为原料,按照质量比为75:25混合,经熔融剪切挤出制备PLA/PBAT共混聚合物基体,再选用硅烷偶联剂KH-550改性的竹粉(KBP)为增强相,采用模压成型制备竹粉复合材料PLA/PBAT/KBP,并对材料的物化性能进行表征测试。差示扫描量热和偏光显微镜测试结果表明,PBAT和KBP通过异相成核效应协同促进PLA晶核快速形成与生长,提高了复合材料的结晶度。力学性能测试结果表明,加入一定质量的KBP未显著弱化聚合物基体的力学性能,提高了复合材料的拉伸模量和弯曲模量。添加竹粉能够减少生物质聚酯的使用,有效降低生产制备成本,实现对资源综合利用的同时,也在响应以竹代塑倡议方面做出了有益尝试。Using the degradable polymers polylactic acid(PLA)and poly(butylene adipate-co-terephthalate)(PBAT)as raw materials,a PLA/PBAT mixed polymer matrix was produced by shear melt extrusion in a mass ratio of 75:25.The silane coupling agent KH-550,the modified bamboo powder(KBP),was selected as the reinforcing phase.The compression molding process was used to produce the bamboo powder composites(PLA/PBAT/KBP),and the physicochemical properties of the materials were characterized and tested.The results of differential scanning calorimetry(DSC)and polarized optical microscopy(POM)showed that PBAT and KBP synergistically promoted the rapid formation and growth of PLA crystallites through heterogeneous nucleation effects and increased the crystallinity of the composite material.The results of the mechanical tests showed that the addition of a certain amount of KBP did not significantly weaken the mechanical properties of the polymer matrix but improved the tensile and flexural modulus of the composite material.Therefore,the addition of bamboo powder can reduce the use of biomass polyester,effectively reduce production costs,and make a beneficial attempt to replace plastic with bamboo while achieving comprehensive utilization of resources.

关 键 词：竹粉 聚乳酸 聚己二酸/对苯二甲酸丁二酯 硅烷偶联剂 可降解复合材料 

分 类 号：TB324[一般工业技术—材料科学与工程] TQ323.4[化学工程—合成树脂塑料工业]