Abstract: In accordance with the difficult problem of particles suspended filter in the air, this paper proposed the target of PM2.5 filter grouped by micron wood wool and micro and nano wood flour. Using filtration material of timber natural environmental and the cavities adsorption function of its natural structure after carbonization to filter automobile exhaust, coal particles and other atmospheric particles suspended. Through analysis of filter at home and abroad, this paper proposed filtering mechanism and technical route of wood-based ecological level anion PM2.5 filter. After feasibility demonstration, it would propose a research direction of application prospects by using wood-based materials as air filter.

Key words: micro-nano, wood wool and wood flour, PM2.5, filter