采用共价键合方法将高分子季铵盐接枝在纳米SiO2粉体表面,其抗细菌效果与无机载银抗菌剂相当,对金黄色葡萄球菌和大肠杆菌的最小抑菌浓度分别为100 mg/L和1500 mg/L.使用抗菌剂母粒化法将其添加到聚乙烯(PE)中制备抗菌塑料,抗菌粉体均匀分散在塑料的外层,平均粒径为200 nm.抗菌塑料对细菌和霉菌的抗菌效果都非常显著,其防霉性能明显优于由无机载银抗菌剂制备的抗菌塑料.抗菌塑料人工老化处理不会使其抗菌效果明显下降,具有良好的抗菌长效性和稳定性.
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