Dispersion of Fullerene C60 in Mineral Based Refrigeration Oils

As Environment-friendly refrigerants HFCs utilized, nano-materials give the opportunity to optimize the performance of refrigeration systems by their special properties. A prerequisite for applying nanoparticles to refrigerating system is dispersing and making them stabilized in refrigeration lubricant. In this paper, the dispersion stability of fullerene C₆₀ in different mineral based refrigeration oils (KT56 LUNARIA, 3GS SUNISO, 4GS SUNISO) were investigated by sedimentation observation method and Fourier transform infrared (FTIR) spectra method. The results indicate: C₆₀ are successfully modified by tween60 and span40; the dispersity in KT56 and 4GS lubricants is better than 3GS; the best stability appears in KT56 lubricant. Comprehensive considering of the dispersion stability, fullerene C₆₀ modified with tween60 and span40 are optimum in KT56 refrigeration oil.