以棉布、麻布、聚丙烯(PP)熔喷非织造布、活性炭布及针刺静电棉为研究对象,通过透气性能测试和颗粒物过滤性能测试评价不同材料的空气过滤性能,并筛选出具有较好过滤性能的防雾霾口罩滤片;在此基础上,以紫外还原银离子(Ag+)的方法在活性炭布表面负载纳米银(Ag)以实现其抗菌功能。并研究了还原时间、硝酸银(AgNO3)溶液用量对载银效果的影响以及载银的牢度。研究结果表明:在AgNO3溶液用量为5%(wt,质量分数)条件下载银效果最佳,以PP熔喷非织造布、针刺静电棉和活性炭布组合制成的滤片具有较好的过滤作用,对PM2.5平均过滤效率达到93.95%。
Several materials such as cotton cloth,linen cloth,polypropylene (PP) melt blown nonwovens,activated carbon cloth and needle punched electrostatic cotton were used to test the air permeability and filtration properties,in order to optimize the filters containing aforementioned materials against fog and haze.Meanwhile,with the aim at improving the antibacterial performance,silver nanoparticles were added,which were reduced from Ag+ by UV radiation and loaded on activated carbon cloth.The impacts of the reduction time and AgNO3 solution mass fraction on the performance and fastness of product were studied.The results indicated that silver generated from 5wt% AgNO3 solution had best property,And the filter by PP meltblown nonwoven fabric,needling static cotton and activated carbon cloth all had a good filtering effect,the average filtration efficiency was 93.95% for PM2.5.
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基金资助
山西省自然科学基金(201601D202019,201601D202018);太原理工大学校基金(2015QN039)
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