聚丙烯抗菌塑料的制备及性能研究

将表面处理过的载银无机抗菌剂与聚丙烯(PP)经双螺杆挤出得到高浓度的抗菌母料,然后按一定比例添加到PP中制备了PP抗菌塑料。研究了抗菌母料的毒性、添加量对PP抗菌塑料抗菌性能的影响,抗菌剂在PP抗菌塑料中的分散性,以及PP抗菌塑料的抗菌性能、力学性能和光老化性能。结果表明,抗菌剂在含4%(质量含量,下同)抗菌母料(或1%的抗菌剂)的PP抗菌塑料中分散均匀,基体力学性能不受影响;其对大肠杆菌、金黄色葡萄球菌等的抗菌率都达到99%以上,具有高效、广谱和长效抗菌性能以及良好的光老化性能。

Study on Preparation and Properties of Antibacterial Polypropylene

A high concentration antibacterial masterbatch was prepared by melt blending polypropylene with surface-modified inorganic antibacterial agent containing silver through a twin screw extruder, which was added into PP to obtain an antibacterial PP. The toxicity of antibacterial masterbatch, the influence of its content on antibacterial performance of PP,and dispersity of antibacterial agent in PP were studied. In addition, the antibacterial performance, mechanical property and photo-aging performance were also investigated. The antibacterial agent was well dispersed in PP matrix. When the content of antibacterial masterbatch was 4 % (1 % antibacterial agent), the mechanical property of PP was not affected. The bactericide efficiency of Escherichia coli, Staphylococcus aureus,etc was above 99 % , and the photo-aging performance was good.