| abstract |
A preparation method of a hydroxyl-modified boron nitride nano-sheet dispersion liquid relates to powder surface modification and its application field. Firstly, in a mixed solvent of isopropanol and water, hexagonal boron nitride (BN) was exfoliated by stirring combined with ultrasonic dispersion to obtain single-layer and few-layer boron nitride nanosheets (BNNS), and then an aqueous sodium hydroxide solution was used as the solvent, Hydroxyl-modified boron nitride nanosheets (BNOH) were prepared by hydrothermal treatment, and finally the hydroxyl-modified boron nitride (BNOH) nanosheet dispersion was obtained by ultrasonic dispersion in water, which has excellent water dispersion stability , which can be applied to the preparation of epoxy resin/graphene/boron nitride composite aerogels. The prepared epoxy resin/graphene/boron nitride composite aerogel has a honeycomb structure, and the graphene and hexagonal boron nitride nanosheets in the composite aerogel are uniformly dispersed in the epoxy resin matrix and have excellent properties. mechanical and thermal insulation properties. |