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Polypropylene/ZnO Nanocomposites: Mechanical Properties Photocatalytic Dye Degradation and Antibacterial Property

机译：聚丙烯/ ZnO纳米复合材料：机械性能光催化染料降解和抗菌性能

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摘要

Nanocomposite materials were prepared by compounding polypropylene (PP) with zinc oxide (ZnO) nanoparticles, using a twin-screw extruder. The compound was molded by injection molding to form dumbbell-shaped specimens. The influence of ZnO nanoparticle content on the morphology, mechanical properties, chemical structure, photocatalytic activity, and antibacterial properties of the obtained nanocomposites was investigated. The morphological images showed that the ZnO nanoparticles were well distributed in the PP matrix. Characterizations of the mechanical properties and chemical structures before and after sunlight exposure found that at the shortest exposure time, crosslinks could occur in the nanocomposites, which resulted in improved mechanical properties. However, sunlight exposure with the time period longer than 18 weeks caused the reduction of the mechanical properties, due to degradation of the PP matrix. It was found that PP with 2% ZnO could achieve the photocatalytic degradation of methylene blue up to 59%. Moreover, the result of antibacterial tests indicated that the nanocomposites had better antibacterial properties than neat PP.
机译：纳米复合材料是通过使用双螺杆挤出机将聚丙烯（PP）与氧化锌（ZnO）纳米颗粒混合而制备的。通过注射成型将化合物成型以形成哑铃状样品。研究了ZnO纳米颗粒含量对所得纳米复合材料的形貌，力学性能，化学结构，光催化活性和抗菌性能的影响。形态图像表明，ZnO纳米粒子在PP基体中分布良好。对日光照射前后的机械性能和化学结构的表征发现，在最短的曝光时间下，纳米复合材料中可能发生交联，从而改善了机械性能。但是，由于PP基体的降解，长时间暴露于阳光下超过18周会导致机械性能下降。发现具有2％ZnO的PP可以实现高达59％的亚甲基蓝的光催化降解。此外，抗菌测试的结果表明，纳米复合材料具有比纯聚丙烯更好的抗菌性能。

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