Journal of Hazardous Materials, Vol.373, 197-203, 2019
beta-Cyclodextrin based air filter for high-efficiency filtration of pollution sources
Airborne particulate matter (PM) pollution has become a serious environmental problem. Thus, there is a need for the development of air filters with satisfactory overall performance. In this paper, we develop a kind of beta-cydodextrin (beta-CD) based air filter with high strength, which has not only high filtration efficiency (about 99%) but also good air permeability (the pressure drop is only 45Pa). Especially after long-term application, the pression drop of beta-cyclodextrin based was less than half of the commercial air-filter. Additionally, the material can capture the toxic gasous chemicals (e.g. formaldehyde and SO2). The introduction of beta-CD is supposed to be the key factor for improvement of air filter.