We developed a high-efficiency rotating triboelectric nanogenerator （R-TENG）- enhanced multi.layered antibacterial polyimide （PI） nanofiber air filters for removing ultrafine particulate matter （PM） from ambient...We developed a high-efficiency rotating triboelectric nanogenerator （R-TENG）- enhanced multi.layered antibacterial polyimide （PI） nanofiber air filters for removing ultrafine particulate matter （PM） from ambient atmosphere. Compared to single- layered PI nanofiber filters, the multilayered nanofiber filter can completely remove all of the particles with diameters larger than 0.54 ffm and shows enhanced removal efficiency for smaller PM particles. After connecting with a R-TENG, the removal efficiency of the filer for ultrafine partides is further enhanced. The highest removal efficiency for ultrafine particulate matter is 94.1% at the diameter of 53.3 nm and the average removal efficiency reached 89.9%. Despite an increase in the layer number, the thickness of each individual layer of the film decreased, and hence, the total pressure drop of the filter decreased instead of increasing. Moreover, the nanofiber film exhibited high antibacterial activity because of the addition of a small amount of silver nanoparticles. This technology with zero ozone release and low pressure drop is appropriate for cleaning air, haze treatment, and bacterial control.展开更多
基金supported by the National Natural Science Foundation of China (10672138) department of education of Hunan province of China(07A071,04C682 ,08C892 ,08C893)Natural Science Foundation of Xiangtan university(08XZX28)
文摘We developed a high-efficiency rotating triboelectric nanogenerator （R-TENG）- enhanced multi.layered antibacterial polyimide （PI） nanofiber air filters for removing ultrafine particulate matter （PM） from ambient atmosphere. Compared to single- layered PI nanofiber filters, the multilayered nanofiber filter can completely remove all of the particles with diameters larger than 0.54 ffm and shows enhanced removal efficiency for smaller PM particles. After connecting with a R-TENG, the removal efficiency of the filer for ultrafine partides is further enhanced. The highest removal efficiency for ultrafine particulate matter is 94.1% at the diameter of 53.3 nm and the average removal efficiency reached 89.9%. Despite an increase in the layer number, the thickness of each individual layer of the film decreased, and hence, the total pressure drop of the filter decreased instead of increasing. Moreover, the nanofiber film exhibited high antibacterial activity because of the addition of a small amount of silver nanoparticles. This technology with zero ozone release and low pressure drop is appropriate for cleaning air, haze treatment, and bacterial control.
