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

A technology of brucite fiber and thermal insulation materials, applied in chemical instruments and methods, silicon dioxide, inorganic chemistry, etc., can solve problems such as expensive raw materials, high equipment requirements, and large particle size of sunscreen agents, and achieve technological and equipment Effects of simplification, enhanced mechanical properties, and good hydrophobicity

Inactive Publication Date: 2006-07-19
CHANGAN UNIV
0 Cites 60 Cited by

AI-Extracted Technical Summary

Problems solved by technology

The particle size of the opacifier is also generally large, and it is difficult to achieve uniform dispersion in the airgel matrix, thus affecting the thermal insulation performance of the airgel nanostructure
[0005] At present, the preparation of airgel in my country mostly uses organosilicon compounds as the silicon sour...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Method used

In the silica sol glue solution of commercially available solid content 25%, add the industrial ZrO of silica sol glue quality 3% powder, 15% tap water, and brucite fiber and ZrO 10% 1,2- Dibutylnaphthalene-6-sodium sulfonate, ball milled for 0.5 hours, poured into a mixer, added brucite fibers with a length of less than 5mm of 5% of the glue liquid mass, beaten and stirred for 1 hour, injected into the mold, at ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Abstract

The invention discloses a preparation method for brucite fiber reinforcement SiO2 aerogel heat insulating material. Wherein, with industrial water glass or silicasol and natural brucite staple fiber as material, using high-energy ball grinding and chemical dispersion method to realize size refining for inorganic opacifier and even distribution before sol solidification; splitting the natural brucite staple fiber into nano diameter with chemical dispesion method as reinforcing material. This invention overcomes the volume shrinkage problem by substituting solvent and hydrophobisation treatment and fiber reinforcement. The materila has density as 0.20~0.50g/cm3 and thermal conductivity factor as 0.010~0.030w/m*k.

Application Domain

Technology Topic

Examples

  • Experimental program(5)

Example Embodiment

[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.

Example Embodiment

[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.

Example Embodiment

[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.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Density0.21g/cm³
Thermal conductivity0.012W·k/m
Density0.43g/cm³
tensileMPa
Particle sizePa
strength10

Description & Claims & Application Information

We can also present the details of the Description, Claims and Application information to help users get a comprehensive understanding of the technical details of the patent, such as background art, summary of invention, brief description of drawings, description of embodiments, and other original content. On the other hand, users can also determine the specific scope of protection of the technology through the list of claims; as well as understand the changes in the life cycle of the technology with the presentation of the patent timeline. Login to view more.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Similar technology patents

2, 5-dihydroxy methyl furan or 2, 5-dihydroxy methyl tetrahydrofuran synthesis method

InactiveCN103804329AWide variety of sourcesHigh catalytic activity and selectivityOrganic chemistryFructoseHexose
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI

Classification and recommendation of technical efficacy words

  • Wide variety of sources
  • Low price

Graphene electrothermal film

Owner:ZHEJIANG TANGUSHANGXI MATERIAL SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products