Abstract
Surface potential of electrostatic filter was investigated by dioctyl phthalate (DOP) aerosol loading. DOP aerosol was used for the loading test required by CFR part84 of the NIOSH standard. Surface potential greatly changed from filter-surface in the back-side due to DOP aerosol loading. Surface potential of back-side of the electrostatic filter changed in proportion to the airflow rate in the range of 5∼15cm/sec. DOP aerosol loading was caused by the disappearance of electrostatic charge of filter. The measurement of the surface potential by DOP aerosol loading can be also applied to the electrification material except for the filter.
