Method for preparing brucite fiber reinforced SiO2 aerogel heat-insulating material

[0019] Example 1

[0020] Industrial TiO with 10% mass of water glass glue was added to the ion-exchanged water glass glue 2 powder, 30% tap water, and chemical dispersant for brucite fiber with TiO 2 Sodium dodecyl benzene sulfonate with a total mass of 15%, ball-milled for 1.5 hours, poured into a mixer, added brucite fibers with a length of less than 5mm and 6% by mass of water glass glue, beating and stirring for half an hour, and then injected with metal mold, heated at 40°C until cured. Then, the solidified body was washed with distilled water until neutral, soaked in absolute ethanol for 48 hours, then immersed in a commercially available silicone solution for 10 minutes, and finally dried at 55°C under normal pressure to obtain the product. The product has no volume shrinkage, good hydrophobicity, and a density of 0.21g/cm 3 , the thermal conductivity is 0.012W/M.K.

[0021] Embodiment 2

[0022] Add 5% industrial Fe by mass of the silica sol to the commercially available industrial silica sol solution with a solid content of 25% 3 O 4 powder, 10% tap water, and brucite fiber with Fe 3 O 4 The total mass of 20% sodium diisooctyl maleate sulfonate was ball-milled for 2 hours, poured into a mixer, and 9% of the mass of the silica sol solution was added with brucite fibers with a length of less than 5 mm, and after beating and stirring for 1 hour, Pour into molds and heat at 50°C until cured. Then washed with distilled water until neutral, soaked with absolute ethanol for 36 hours, then soaked with silicone for 20 minutes, and finally dried at normal pressure at 65°C to obtain the product. The product has no volume shrinkage, good hydrophobicity, and a density of 0.43g/cm 3 , the thermal conductivity is 0.025W/M.K.

[0023] Embodiment 3

[0024] Industrial TiO with 15% mass of water glass glue was added to the ion-exchanged water glass glue 2 powder, 20% tap water, and brucite fiber with TiO 2 Sodium dodecyl sulfate with a total mass of 25%, ball milled for 1 hour, poured into a mixer, added with 7.5% of the water glass glue mass and brucite fibers with a length of less than 5 mm, beat and stirred for 1 hour, poured into the mold, at 35 Heat at °C until cured. Then, the solidified body was washed with distilled water until neutral, soaked with absolute ethanol for 48 hours, then soaked with commercially available silicone solution for 30 minutes, and finally dried at 60°C under normal pressure to obtain the product. The product has no volume shrinkage, good hydrophobicity, and a density of 0.40g/cm 3 , the thermal conductivity is 0.020W/M.K.