用双螺杆挤出机制备了含3%改性竹炭聚丙烯母粒,并熔融纺丝制备了改性竹炭聚丙烯纤维。采用Mastersizer 2000激光粒度仪、TEM、SEM、FT-IR、XRD分析改性竹炭微粉的粒度分布及结构,用SEM、TG-DSC对母粒及纤维进行了表征。结果表明改性竹炭微粉的粒度为5.8μm,粒子均匀分布在聚丙烯基体中,纤维表面不光滑,直径为25～80μm;DSC结果表明竹炭粒子加入会提高PP熔点;TG结果显示竹炭粒子的加入会加速PP的分解。采用抑菌晕法和振荡摇瓶法对竹炭聚丙烯的抗菌性能进行研究,发现其对大肠杆菌具有较好的抑制效果。
Polypropylene（PP） had been compounded with bamboo charcoal（BC） modified by nano-TiO2 for preparing 3 wt% BC/PP masterbatch using a twin-screw extruder,and the BC/PP fibers were prepared using high-speed melt-spinning device.The particle size distribution and structure of BC powders were characterized by Mastersizer 2000 laser particle size analyzer,SEM,TEM,FT-IR and XRD.The physical properties of masterbatch and fibers were examined using SEM,FT-IR and TG/DSC.These techniques indicated that the BC particle size was found to be less than 5.8 μm and the particles were dispersed uniformly in PP matrix.The diameter of the BC/PP fibers was 25-80μm,the surface was not smooth as the BC particles were distributed on the surface of the fibers.TG-DSC results showed that the melting point of PP increased and the degradation of PP accelerated as the addition of BC powders.The antibacterial effects of the BC/PP fibers were assessed from inhibition zone and shake flask test,and an excellent antibacterial performance was discovered against E.coli.
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