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以凹凸棒土为载体,通过硼氢化钠还原氯金酸的方法得到粒径可控,分布均匀的纳米金/凹凸棒土(Au-OAT),将亚甲基蓝吸附于Au-OAT上制得MB-Au-OAT抗菌剂。将MB-Au-OAT添加到甲基丙烯酸甲酯(MMA)单体中,采用原位聚合法制备出聚甲基丙烯酸甲酯(PMMA)复合材料。结果表明,MB-Au-OAT在光照下的最小抑菌浓度(MIC)为0.06mg/mL,黑暗中的最小抑菌浓度为0.08mg/mL,与Au-OAT相比,抗菌活性明显增强。当MB-Au-OAT添加量为3%时,PMMA复合材料综合力学性能最佳,在光照及黑暗条件下对大肠杆菌的抗菌率均达到100%。
Au-OAT with controlled particle size and uniform distribution was obtained by the method of reducing sodium chloraurite with sodium borohydride by using attapulgite as the carrier and adsorbing methylene blue on Au-OAT to obtain MB- Au-OAT antibacterial agent. MB-Au-OAT was added to MMA monomer, and PMMA composite was prepared by in-situ polymerization. The results showed that the minimum inhibitory concentration (MIC) of MB-Au-OAT was 0.06 mg / mL in the light and the minimum inhibitory concentration in the dark was 0.08 mg / mL. Compared with Au-OAT, the antibacterial activity of MB-Au-OAT was significantly enhanced. When the amount of MB-Au-OAT is 3%, the mechanical properties of PMMA composites are the best, and the antibacterial rate of Escherichia coli is 100% under light and dark conditions.