The invention provides a preparation method of perfluorotriethylamino high-heat-conducting lubricating nano-fluid and belongs to the field of preparation of a composite liquid working medium of a fluid loop
system for a
spacecraft. Efficient heat exchange and effective
lubrication of the fluid loop
system are realized through preparing fluorinated
graphene-perfluorotriethylamino nano fluid; a hydrothermal method is adopted and
hydrofluoric acid is used as a fluorinating
reagent to carry out fluorination on
graphene oxide, so as to successfully prepare multilayered fluorinated
graphene; experiment equipment is relatively simple and a preparation process is easy to operate. The
fluorine ratio on the surface of graphene can be controlled and adjusted. The graphene subjected to fluorination treatment has good
dispersity in a perfluorotriethylamino working medium; a dispersant is not needed so that the
heat resistance of a heat transferring interface can be reduced and the heat conductivityof the nano-fluid is remarkably improved.
Fluorine atoms are inserted into graphene lamellas, the inter-lamellar spacing is enlarged and the acting force between
layers is reduced; meanwhile, a strong repulsive force action between the
fluorine atoms is very good for sliding between the
layers, and the wear-reduction lubricating performance of the nano-fluid can be remarkably improved.