▎ 摘　　要

NOVELTY - A preparation method of aerogel framework, involves dispersing fluorinated boron nitride nanosheets and graphene oxide in polyvinyl alcohol aqueous solution or carboxymethyl cellulose aqueous solution to obtain aqueous slurry, placing the aqueous slurry in a mold for bidirectional freezing, and drying to obtain a final product. USE - Preparation method of aerogel framework (claimed). ADVANTAGE - The preparation method of aerogel framework does not involve any organic reagent, and the process is simple and environmentally-friendly. The prepared aerogel framework has excellent thermal conductivity. By changing the water contact angle of the frozen interface and adjusting the solid content of the aqueous slurry, the effective control of the microstructure of the aerogel framework is achieved. The aerogel framework is prepared with different layer spacing and layer thickness. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: 1.an aerogel framework; and 2.a method for regulating and controlling the interlayer distance and layer thickness of aerogel framework, which involves regulating the interlayer spacing and layer thickness of the aerogel framework by changing the water contact angle of the freezing interface during the bidirectional freezing process, and/or by changing the solid content of the aqueous slurry to regulate the interlayer distance and the layer thickness of the aerogel framework, where the control range of the water contact angle of the freezing interface is 20-160degrees, and the control range of the solid content of the aqueous slurry is 0.5-9.5 wt.%.