多步沉淀法制备纳米无机复合抗菌粉体

目的研究一种以银、钛和锡为组分的新型纳米无机复合抗菌粉体的制备工艺。方法采用多步沉淀法,并通过单因素实验和正交实验确定最优工艺条件。结果最终产品的基本化学组成式为Ag0.03Sn0.16Ti0.35P0.11O0.34;产率达95.5%;粉体平均粒径50 nm;无外加光照、粉体浓度80mg/L时,30 min内其对大肠杆菌、金黄色葡萄球菌和白色念珠菌的抗菌率均达100%;粉体颜色浅,耐候性好。结论该方法制备的粉体具有较强的广谱抗菌效果,解决了银系抗菌剂易变色、对真菌作用效果不佳及钛系抗菌剂必须有光照才能起作用等问题。

Multistep deposition production process of nano inorganic composite antibacterial powder

Aim To study the preparation technology of a new nano inorganic composite antibacterial powder with the constituents of silver,titanium,tin and phosphate.Methods Adopt multistep deposition production process,and the optimal process conditions will be found from one-factor influence tests and multi-factor orthogonal test.Results The constitution was: Ag 0.03Sn 0.16Ti 0.35P 0.11O 0.34;the conversion was 95.5%.The average diameter of the fine particles was 50 nm.The antibacterial tests showed that this powder has 100% bactericidal action on E.coli,S.aures and C.albicans within 30 minutes with 80 mg/L(powder concentration) under the condition of dark environment.Conclusion The powder has strong and broad-spectrum antibacterial effect and has successfully resulved the problem that the Ag-series inorganic antibacterial agent has a bad antibacterial effect on fungi and Ti-series inorganic antibacterial agent makes less effect under the condition of dark environment.Besides,the problem of Ag-antibacterial agent tarnishing has been resolved.