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

作　　者：张琼[1] ZHANG Qiong(Jinzhong Vocational&Technical College,Jinzhong 030600,China)

机构地区：[1]晋中职业技术学院,山西晋中030600

出　　处：《塑料科技》2024年第1期80-83,共4页Plastics Science and Technology

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/m^(2),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T_(5%)为312℃,说明复合材料的热稳定性增强。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/m^(2),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 T_(5%) 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 

分 类 号：TB332[一般工业技术—材料科学与工程]