Low-Resistance Dual-Purpose Air Filter Releasing Negative Ions and Effectively Capturing PM2.5

• DOI: 10.1021/acsami.7b00351
• Publication Date: 2017-03-15T11:54:02Z
• Authors: Xinglei Zhao; Yuyao Li; Ting Hua; Pan Jiang; Xia Yin; Jianyong Yu; Bin Ding
• Keywords: 02 engineering and technology; 0210 nano-technology

The fatal danger of pollution due to particulate matter (PM) calls for both high-efficiency and low-resistance air purification materials, which also provide healthcare. This is however still a challenge. Herein, filter capable releasing negative ions (NIs) efficiently capturing PM2.5 was prepared by electrospinning polyvinylidene fluoride (PVDF) fibers doped with powder (NIPs). air-resistance fibrous membranes decreased from 9.5 6 Pa (decrease 36%) on decreasing the average fiber diameter 1.16 0.41 μm. Moreover, lower rising rate reduction in pore size, thinner verified. In addition, single PVDF/NIPs provided strong surface potentials, high fluorine electronegativity, tested using atomic force microscopy. potential resulted higher amounts NIs (RANIs). Interestingly, favored alleviation shielding effects electric field around promoted RANIs 798 1711 cc–1. regulating doping contents NIPs, increased 2818 resultant showed low resistance 40.5 Pa. Field-tests conducted Shanghai stable efficiency 99.99% at RANIs, event haze.