【摘要】 空气污染特别是颗粒物（PM）污染,已经威胁到人类的身体健康,因而引起了全世界的高度关注.人们在室外可通过口罩进行个人防护,然而一般的商业口罩起不到好的防护效果.本文利用静电纺丝技术和溶剂蒸汽退火（SVA）方法制备了新型高效的聚（ε-己内酯）/聚环氧乙烷（PCL/PEO）空气过滤纳米纤维.通过SVA处理,纤维表面变得褶皱,增强了对PM2.5的捕获效率.在重度污染状况(PM2.5颗粒浓度>225 mg m^-3)下,这种纳米褶皱空气过滤膜的移除效率达80.01%.秦皇岛雾霾天实地测量表明,空气过滤膜能高效移除PM2.5.与商业口罩相比,本文经过SVA处理后的PCL/PEO空气过滤膜具有制备方法简单、环境友好且易降解的特性,在高效过滤膜领域有潜在应用.更多还原

【Abstract】 Recently, air pollution has become more serious and started to have a dramatic effect on the health of humans in many large cities. Generally, outdoor personal protection,such as commercial masks, cannot effectively prevent the inhalation of many pollutants. Particulate matter（PM） pollutants are a particularly serious threat to human health. Here we introduce a new efficient air filtration mat that can be used for outdoor protection. The new efficient air filter’s nanocomposite materials were successfully fabricated from poly（ε-caprolactone）/polyethylene oxide（PCL/PEO） using an electrospinning technique and solvent vapor annealing（SVA）.SVA treatment endows the wrinkled fiber surface and enhances the PM2.5 capture capacity of protective masks. This nanowrinkled air filtration mat can effectively filter PM2.5 with a removal efficiency of 80.01% under seriously polluted conditions(PM2.5 particle concentration above 225 mg m^-3).Our field test in Qinhuangdao indicated that the air filtration mat had a high PM2.5 removal efficiency under thick haze.Compared to commercial masks, the fabricated SVA-treated PCL/PEO air filter mat demonstrated a simpler and ecofriendly preparation process with excellent degradation characteristics, showing wide potential applications with a high filtration efficiency.更多还原