Stability and decay of surface electrostatic charges in liquids

Understanding the mechanism of the stability and decay of surface electrostatic charges in different liquid environments is critical for the reliability of devices based on electrostatic functions or preventing the damage from electrostatic charge accumulation. In this work, the influences of surface electrostatic charges in polar and protic (Ethanol and Water), polar and aprotic (Tetrahydrofuran and Chloroform), and non-polar and aprotic (Benzene and Hexane) liquids have been investigated. Results prove that ionization in liquid or polarity of the liquid molecules can determine the electrostatic charges neutralization, and adding small amount of matter (1% Vol) that can ionize in non-polar and aprotic liquids can avoid the electrostatic charges accumulation. Moreover, air-bubble-structured electret is designed to improve the water-against ability for surface electrostatic charges.