纳米蒙脱石改性聚乳酸/聚己内酯复合材料的制备与性能研究
Preparation and Performance of Nano-Montmorillonite Modified Polylactic Acid/Polycaprolactone Composites
张琼1
作者信息
- 1. 晋中职业技术学院,山西 晋中 030600
- 折叠
摘要
聚乳酸/聚己内酯(PLA/PCL)是一种环境友好的生物可降解复合材料,但材料的力学性能较差限制其使用范围.文章在PLA/PCL基体中掺杂了纳米蒙脱石3(NMM)制备PLA/PCL/NMM,并使用X射线衍射仪(XRD)、动态力学性能分析仪(DMA)和热重分析仪(TG)对PLA/PCL/NMM的性能进行表征.结果表明:NMM掺杂含量3%时,复合材料具有较好的综合性能.PLA/PCL/3%NMM的拉伸强度和弹性模量分别为58.1 MPa和4.1 GPa,相比PLA/PCL提升了31.4%和41.4%.PLA/PCL/3%NMM的断裂伸长率和冲击强度分别为6.4%和48.1 J/m2,相比PLA/PCL提升了14.3%和15.6%;PLA/PCL/3%NMM的储能模量提升至2 380 MPa.PLA/PCL/3%NMM的T5%为312℃,说明复合材料的热稳定性增强.
Abstract
Poly(lactic acid)/poly(caprolactone)(PLA/PCL)is an environmentally friendly biodegradable composite,but the poor mechanical properties limit its range of use.PLA/PCL/NMM was prepared by doping nano montmorillonite(NMM)into the PLA/PCL matrix,and the performance of PLA/PCL/NMM was characterized using X-ray diffraction(XRD),dynamic mechanical performance analyzer(DMA),and thermogravimetric analyzer(TG).The results show that when the NMM doping content is 3%,the composite has good comprehensive performance.The tensile strength and elastic modulus of PLA/PCL/3%NMM are 58.1 MPa and 4.1 GPa,respectively,which are 31.4%and 41.4%higher than PLA/PCL.The fracture elongation and impact strength of PLA/PCL/3%NMM are 6.4%and 48.1 J/m2,respectively,which are 14.3%and 15.6%higher than PLA/PCL;The storage modulus of PLA/PCL/3%NMM is increased to 2 380 MPa.The T5%of PLA/PCL/3%NMM is 312℃,indicating an enhanced thermal stability of the composite.
关键词
聚乳酸/聚己内酯/纳米蒙脱土/力学性能/热稳定性Key words
PLA/PCL/NMM/Mechanical properties/Thermal stability引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据