【作者】 王洪水； 乔学亮； 陈建国； 谈发堂； 李世涛；

【Author】 Hongshui Wang;Xueliang Qiao;Jianguo Chen;Fatang Tan;Shitao Li;State Key Laboratory of Plastic Forming Simulation and Die and Mould Technology,Huazhong University of Science and Technology;Department of Material of Hebei University of Technology;

【机构】 河北工业大学材料学院； 华中科技大学模具国家重点实验室表面研究室；

【摘要】 本文讨论了纳米银及纳米银聚丙烯树脂的抗菌性能,分别用最小抑菌浓度和24小时杀菌率表征了纳米银及树脂的抗菌活性。研究表明,当银粉直径从500nm降低至50nm后,其抗菌能力显著提高,其对大肠杆菌的最小抑菌浓度从31.25ppm降低至1.6ppm,对金色葡萄球菌的最小抑菌浓度从62.5ppm降低至6.25ppm,当颗粒直径继续降低至5nm后,由于团聚的影响,其抗菌能力的提高幅度减小,其对大肠杆菌和金色葡萄球菌的最小抑菌浓度分别为0.4ppm和1.6pm;树脂的抗菌性能随颗粒直径变化的规律与最小抑菌浓度的变化相似,但由于熔炼过程中的团聚增加,抗菌性能提高的幅度减小。更多还原

【Abstract】 The antibacterial activity of silver nanoparticles and polypropylene resin(PP) with silver particles added was studied in this paper,and it was characterized by Minimum inhabitation concentration(MIC) and 24 hour Sterilizing efficiency(24h SE).It shows that the antibacterial capacity is improved dramatically with the decreasing of particle’s diameter(R).The MIC for Escherichia coliform(E-coli) and Staphylococcus aureus(S-aureus) lessens to 1.6ppm and 6.25 ppm form 31.25 ppm and 62.5ppm,when R reduces form 500 nm to 50 nm.When R reduces to 5nm,the range of decrease of MIC minishes,owing to the agglomeration,and the MIC for E-coli and S-aureus is 0.4ppm and 1.6ppm respectively.The change of PP’s24h SE with the reducing of R is similar with the change of MIC.But due to the conglomeration of particles during the smelt,the range of growth of antibacterial activity reduces.更多还原