Journal
MACROMOLECULAR MATERIALS AND ENGINEERING
Volume 301, Issue 12, Pages 1473-1481Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/mame.201600293
Keywords
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Funding
- National Young Top Talents Plan of China [2013042]
- National Science Foundation of China [51175066]
- FANEDD [201164]
- Program for New Century Excellent Talents in University [NCET-12-0704]
- Science Foundation for Distinguished Young Scholars of Heilongjiang Province [JC201403]
- Natural Science Foundation of Heilongjiang Province [E2015034]
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Microcapsules containing an ionic liquid (IL) are potential candidate materials for preparing in situ self-lubricating composites with.excellent tribological properties. 1-ethyl-3-methylimidazolium bis[(trifluoromethyl) sulfonyl]imide ([EMIm]NTf2) IL encapsulated polysulphone microcapsules are synthesized. The mean diameter and wall thickness are about 128 mu m and 10 mu m, respectively. Microcapsules have excellent thermal stability, with a thermal degradation onset temperature of 440 degrees C compared to traditional lubricants loaded microcapsules. In situ self-lubricating composites are prepared by incorporating the IL-encapsulated microcapsules into epoxy matrix. When the concentration of the IL microcapsules is 20 wt%, the frictional coefficient and specific wear rate of composites are reduced by 66.7% and 64.9% under low sliding velocity and middling applied load conditions, respectively, as compared to the neat epoxy. The tribological behavior of the self-lubricating composites is further assessed in different applied load and sliding velocity conditions. The in situ self-lubricating mechanism of composites is proposed.
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