聚苯乙烯纤维薄膜PM2.5拦截吸附效果研究

In general, there are mainly two kinds of masks in the market. Some are made of activated carbon or cotton as main material because of the better adsorption capacity of particulate matter. However, particles with size smaller than the fiber space, such as PM2.5, always pass across the filter layer and go into lungs, which is a threat of cardiopulmonary function and a cause of adverse effects on health. Other masks are made of high technology materials, which have excellent adsorption ability. Although they can effectively adsorb and filter PM2.5, they are lack of comfort because of the resistance to breathing process. Based on this, we consider exploring a new kind of mask filter material in order to improve anti-fog performance. Electrospinning is a special fiber manufacturing process, which can be used to prepare polymer filaments with diameter of micro and nano scale. Polystyrene fiber membrane, with its own electrostatic, porous structure, has the fiber diameter of 2-3 micrometers. We compared polystyrene fiber film, activated carbon mask, disposable mask and cotton mask, which are being sold in the market, to research their intercept and adsorption of PM2.5. And their microstructure was observed in order to study the relationship between the structure of fiber and its interception capacity and adsorptivity. Finally, the electrospun polystyrene film was verified with better filtration effect. The block-adsorption rate of inhalable particles can reach more than 98.87%, which provides a new choice for the manufacture of the new filter material.