摘要
以聚乳酸(PLA)/聚己内酯(PCL)(85/15,质量比)为基体,添加多壁碳纳米管(MWCNTs)与硅烷偶联剂KH-570改性电气石粉(MTM),旨在制备同时具备导电与释放负离子双重功能的PLA/PCL基复合材料。使用正交试验设计,系统研究MWCNTs(0%~3%)与MTM(3%~7%)质量分数对PLA/PCL复合材料拉伸性能、电导率及负离子释放量的影响。结果表明,复合材料力学性能主要受MTM含量影响,其质量分数从3%增至7%时,平均拉伸强度下降27.7%,平均断裂伸长率降低52.1%;随MWCNTs质量分数从0增至3%,复合材料平均电导率从3.23×10^(-11)S/m增至0.81 S/m;随MTM质量分数从3%增至7%,平均负离子释放量从357个/cm^(3)增至460个/cm^(3)。优化配方MWCNTs质量分数为1%和MTM质量分数为5%时,复合材料兼具良好综合性能,拉伸强度为42.20 MPa、电导率为6.25×10^(-5)S/m、负离子释放量为420个/cm^(3),为3D打印医疗电子器件提供新材料选择。
A composite material with polylactic acid(PLA)/polycaprolactone(PCL)with the mass ratio of 85:15 as the matrix was developed by incorporating multi-walled carbon nanotubes(MWCNTs)and tourmaline powder modified with the silane coupling agent KH-570(MTM),which possessed both electrical conductivity and negative ion release capabilities.Using an orthogonal experimental design,the effects of the mass fraction of MWCNTs and MTM on the tensile properties,electrical conductivity,and negative ion release of the composites were systematically investigated.The results indicate that the mechanical properties of the composites are primarily influenced by the MTM content.When the MTM content increased from 3 wt%to 7 wt%,the average tensile strength decreased by 27.7%,and the average elongation at break reduced by 52.1%.As the MWCNTs content increases from 0 wt%to 3 wt%,the average electrical conductivity of the composites increases from 3.23×10^(-11)S/m to 0.81 S/m.With an increase in MTM content from 3 wt%to 7 wt%,the average negative ion release increases from 357 ions/cm^(3)to 460 ions/cm^(3).The optimized formulation,with 1 wt%MWCNTs and 5 wt%MTM,results in a composite with balanced comprehensive properties:a tensile strength of 42.20 MPa,an electrical conductivity of 6.25×10^(-5)S/m,and a negative ion release of 420 ions/cm^(3),and providing a new material option for applications in 3D printing and medical electronic devices.
作者
刘少杰
褚忠
刘铁一
LIU Shaojie;CHU Zhong;LIU Tieyi(Department of Intelligent Technology,Shanghai Institute of Technology,Shanghai 201418)
出处
《工程塑料应用》
北大核心
2025年第11期66-71,共6页
Engineering Plastics Application
关键词
复合材料
聚乳酸
聚己内酯
电气石
多壁碳纳米管
composite
polylactic acid
polycaprolactone
tourmaline
multi-walled carbon nanotube
