中文摘要：

通过熔融方式将表面季铵化修饰的SiOx纳米颗粒与PVC树脂共混，制备了抗菌纳米复合材料，研究了其性能。实验表明，表面经过高分子季铵化的纳米SiOx颗粒，在复合材料中不仅起到增强增韧的纳米改性作用，还使材料具备稳定的抗菌功能。与普通PVC材料相比，抗菌纳米复合材料的拉伸强度和冲击强度分别提高了66．3％和124．1％，抗菌率达到了（89±1）％。通过电子探针元素分布面扫描，证明了季铵盐-SiOx颗粒在PVC材料中具有良好的分散性。

英文摘要：

PVC/Q-SiOx antimicrobial composite was prepared by means of melt blending of PVC with quaternized SiOx nano-meter particles, and the property of the prepared composite was studied. The results showed Q-SiOx nano-meter particles had the synergistic toughening, strengthening and antimicrobial effects on PVC. Compared with common PVC, the tensile strength and impact strength of the composite were increased by 66.3 % and 124.1% respectively, and the microbicidal rate of the composite was up to （89 ± 1） %. The result of the analysis by electric probe with plane element-scanning showed Q-SiOx nano-meter particles dispersed well in PVC.