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Tribological performances on porous polyphenylene sulfide self-lubricating composites with super wear resistance

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Journal of Thermoplastic Composite Materials

Published online on

Abstract

The porous polyphenylene sulfide (PPS) self-lubricating composites with sweating effect were designed and fabricated, and the friction and wear behavior were evaluated. Results indicated that, porous PPS self-lubricating composite modified by 1 wt.% zeolite and impregnated with lithium-base grease in the pores showed the lowest friction coefficient and wear rate, which were recorded as 0.024 and 1.79 x 10-16 m3/Nm, respectively. Compared with pure PPS under dry condition, the friction coefficient reduced by 90% and wear resistance increased by 4.67 x 104 times. The wear resistant enhanced by 3.61 times than that of PPS/30 wt.% NaCl composites, so it showed synergistic effect on improving wear resistance. By means of scanning electron microscope, it was found that the pores of porous PPS composites with 1 wt.% zeolite were uniformly distributed and grease were well embedded in these orderly pores of PPS composites. Under the effect of load and temperature, grease squeezed from micropores and nanopores can provide the excellent lubrication effect, which are the main reason for the outstanding self-lubricating and wear resistance of PPS porous composites.