Effect of pH on the Friction Performance of PHP and PHPB Microporous Membrane and the Modulation of PNIPAM Slow Release
For the lubrication film in water-based lubrication is prone to failure due to water evaporation,two microporous membranes,namely,PVA-HPC-PNIPAM and PVA-HPC-PNIPAM-Na2B4O7,were prepared in which the retardation of lubricant PNIPAM was regulated by external conditions to make the lubrication effective for a long period of time.Fourier transform infrared spectroscopy(FT-IR)was used to analyze the functional groups in the microporous membranes;the friction and wear performance of the two microporous membranes in different pH media was investigated by a high-speed reciprocating friction and wear tester;and the amount of PNIPAM retardation was quantitatively analyzed by ultraviolet spectrophotometry.The results show that different pH values have little effect on the friction performance of the microporous membranes,but have a greater effect on the wear amount of the membranes,and at the same time,the pH value can regulate the slow release of PNIPAM,so as to achieve a long-time lubrication effect.
sensitive hydrogellubricant slow-releasefriction and wear
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