Abstract
This article generalizes studies of corona electrets based on polymer composite materials. It describes processes that occur in polymer materials under corona discharge and responsible for the electret property magnitudes. Changes that take place in fine filler-loaded polymers can both increase and decrease electret properties and their stability over time. Optimal filler content in polymer materials that results in electret property enhancement by the factor of 2–2.5 is 2–6 vol%. At this filler loading reasons that induce growth of electret properties prevail. This article gives examples of new electret applications—in food packaging, antibacterial facial mask manufacturing, and oil recovery.
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