Abstract:

In order to solve a common problem of static decay in electret filter materials, and make static long-lasted in filter materials, the conductive nonwoven material was selected as the research object in this experiment, while the filter test device was modified and electrostatic was applied on the condutive filter materials, and the relationship between filtration efficiency and the applied static electricity was studied experimentally. The results show that resistance of the samples are substantially unchanged, but the filtration efficiency can greatly be improved by 26.1% in a relatively small voltage range (0-7 kV), and approximately a linear relationship exists between the filtration efficiency and the voltage value. The filtration efficiency of non-conductive polyester fabric is also improved under forced static electricity, but the growth rate is not as fast as conductive fiber filter. Electrostatic adsorption plays an important role in the fabric filtration, can improve the filtration efficiency, and does not affect the fkltration resistance, which provides reference, which provides reference for the industrial application of filter material.

Key words: electrostatic adsorption, conductive media, filtration efficiency, applied voltage, surface potential