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中文摘要：
采用沉降实验、激光粒度分布、透射电镜等手段，研究PVPK17对Ag／ZnO纳米复合抗菌剂的解团聚的影响及机制，同时采用最小抑荫浓度对解团聚前后的抗菌性能进行表征。结果表明：经PVPK17解团聚后的Ag／ZnO纳米复合抗菌剂可在异丙醇中稳定悬浮6d以上，分散后的Ag／ZnO纳米复合抗菌剂的平均粒度可达51.3nm，当加入PVPK17的质量百分数为40％时达到最佳分散效果。用透射电镜观测表明，解团聚的Ag／ZnO纳米复合抗菌剂分散较好，在此基础上二建立了PVPk17对Ag／ZnO纳米复合抗菌剂的解团聚模型。抗菌实验表明，分散后的Ag／ZnO纳米复合抗菌剂的MIC可达50mg／L，抗菌性能良好。
英文摘要：
In this paper, a deaggregation technology and its mechanism were studied for the Ag/ZnO nanoeomposite antibacterial agent added with PVPK17 by sedimentation experiment, laser scattering particle size analysis and transmission electron microscopy （TEM）. The minimum inhibitory concentration of the fore-aft deaggregation Ag/ZnO nanocomposite antibacterial agent was tested. The results showed that the Ag/ZnO nanocomposite antibacterial agent in isopropanol could be stable suspension more than 6 days after deaggregation with PVPk17, the average particle size was smaller than 51.3 nm. The dispersion effect was the best when the mass % of PVPk17 was 40%. TEM results show that the Ag/ZnO nanocomposite antibacterial agent is kindly dispersed. Then, a model of deaggregation mechanism was built. The MIC ofAg/ZnO nanocomposite antibacterial agent was 50 mg/L after deaggregation, with good antibacterial property.
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