Applications of polymer electrets for pollution studies

Pillai, P. K. C.; Khurana, Paramdeep
May 1988
Applied Physics Letters;5/2/1988, Vol. 52 Issue 18, p1540
Academic Journal
The analysis and identification of the pollutants sticking onto the surfaces of electrets prepared from polymethylmethacrylate and polytetrafluoroethylene have been done by scanning electron microscopic, mass spectrometric, and near infrared spectrophotometric techniques. Electret samples exposed to atmospheres containing carbon tetrachloride, xylene, and acetone at their saturation vapor densities, individually, and in mixed atmospheric conditions of carbon tetrachloride and acetone have shown characteristic spectra of these pollutants. Scanning electron microscopic studies of the exposed electret samples have also shown corresponding structural changes. These studies have clearly indicated that electrets are efficient devices for collecting, detecting, and even controlling various types of pollutants.


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