Preparation and Properties of Controllable Porous Films Containing Lubricant Oil

Porous polyimide (PI) films containing lubricant oil were obtained from the controllable porous PI films using silica microspheres as the template. The content of lubricant of the PI films containing lubricant oil and inner porous can be controlled by adjusting the weight content of silica microspheres. It is found the oil content and oil retain of oil-containing PI films are up to 40.6% and 100%, respectively. The lubricant oil in porous PI films has no influence on the thermal stability of the film. The wear lifetime of the porous PI films is obviously improved by lubricant oil, and is prolonged with oil content. At low rotating speed, two friction regimes, i.e. dry friction and oil lubrication are found for the porous PI films containing lubricant oil.