Unlock instant, AI-driven research and patent intelligence for your innovation.

Ceramic fiber/hydrophobic silica airgel composite material and preparation method thereof

A silica and ceramic fiber technology, applied in chemical instruments and methods, silicon compounds, fiber processing, etc., can solve the problems of high brittleness, high preparation cost, low strength, etc., and achieve strength improvement, strong production continuity, and preparation low cost effect

Active Publication Date: 2021-08-20
CENT SOUTH UNIV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a ceramic fiber / hydrophobic silica airgel composite material and a preparation method thereof, the purpose of which is to solve the problems of high preparation cost, low strength and high brittleness of the ceramic fiber / silica airgel composite material. Technical problems, while effectively improving the fireproof and moisture-proof performance of composite materials

Method used

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Ceramic fiber/hydrophobic silica airgel composite material and preparation method thereof
  • Ceramic fiber/hydrophobic silica airgel composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The preparation process of a kind of ceramic fiber / water glass hydrophobic silica airgel composite material mat provided by the present embodiment comprises the following steps:

[0034] (1) Preparation of water glass gel

[0035] Dilute water glass with a modulus of 3.55 and deionized water at a volume ratio of 1:3 (water glass: deionized water = 1:3), stir evenly on a magnetic stirrer, and set aside;

[0036] Take 2 mL of phosphoric acid (PA) in a beaker, add 50 mL of diluted water glass (add 2 / 3 first, then slowly add the remaining 1 / 3), and the whole process is completed on a magnetic stirrer;

[0037] Get water glass gel after 1-2min, seal the gel with plastic wrap and age (aging) for 8-12h;

[0038] (2) Modification of water glass gel

[0039] Weigh 50g of wet gel in a sealed bag and crush it in advance (as delicate as possible);

[0040] Add 50mL ethanol (EtOH), and carry out mechanical stirring;

[0041] Add 100mL HMDSO during stirring, continue mechanical s...

Embodiment 2

[0052] The preparation process of a kind of ceramic fiber / water glass hydrophobic silica airgel composite material mat provided by the present embodiment comprises the following steps:

[0053] (1) Preparation of water glass gel

[0054] Dilute water glass with a modulus of 3.55 and deionized water at a volume ratio of 1:3 (water glass: deionized water = 1:3), stir evenly on a magnetic stirrer, and set aside;

[0055] Take 2 mL of phosphoric acid (PA) in a beaker, add 50 mL of diluted water glass (add 2 / 3 first, then slowly add the remaining 1 / 3), and the whole process is completed on a magnetic stirrer;

[0056] Get water glass gel after 1-2min, seal the gel with plastic wrap and age (aging) for 8-12h;

[0057] (2) Modification of water glass gel

[0058] Weigh 50g of wet gel in a sealed bag and crush it in advance (as delicate as possible);

[0059] Add 50mL ethanol (EtOH), and carry out mechanical stirring;

[0060] Add 100mL HMDSO during stirring, continue mechanical s...

Embodiment 3

[0071] The preparation process of a kind of ceramic fiber / water glass hydrophobic silica airgel composite material mat provided by the present embodiment comprises the following steps:

[0072] (1) Preparation of water glass gel

[0073] Dilute water glass with a modulus of 3.55 and deionized water at a volume ratio of 1:3 (water glass: deionized water = 1:3), stir evenly on a magnetic stirrer, and set aside;

[0074] Take 2 mL of phosphoric acid (PA) in a beaker, add 50 mL of diluted water glass (add 2 / 3 first, then slowly add the remaining 1 / 3), and the whole process is completed on a magnetic stirrer;

[0075] Get water glass gel after 1-2min, seal the gel with plastic wrap and age (aging) for 8-12h;

[0076] (2) Modification of water glass gel

[0077] Weigh 50g of wet gel in a sealed bag and crush it in advance (as delicate as possible);

[0078] Add 50mL ethanol (EtOH), and carry out mechanical stirring;

[0079] Add 100mL HMDSO during stirring, continue mechanical s...

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
densityaaaaaaaaaa
sizeaaaaaaaaaa
densityaaaaaaaaaa
Login to View More

Abstract

The invention provides a ceramic fiber / hydrophobic silica airgel composite material and a preparation method thereof. The method comprises: adding water glass solution to phosphoric acid under stirring, sealing and aging to obtain water glass gel; After the gel is broken, it is dispersed in an organic solvent, and hexamethyldisiloxane is added under mechanical stirring for modification treatment, then concentrated hydrochloric acid or concentrated sulfuric acid is added for catalytic treatment, and finally magnetic stirring reaction is carried out in a water bath to obtain hydrophobic dioxide Silica airgel solution; the organic solvent in the hydrophobic silica airgel solution is separated to obtain liquid hydrophobic silica airgel; the ceramic fiber mat is immersed in the liquid hydrophobic silica airgel After the ceramic fiber mat is saturated and absorbed, it is dried to obtain a hydrophobic silica airgel composite material. The above preparation method is low in cost, simple and easy to operate, and the obtained composite material has high strength, excellent hydrophobicity and fireproof performance, and also has the effects of light weight and sound insulation.

Description

technical field [0001] The invention relates to the technical field of silica airgel preparation, in particular to a ceramic fiber / hydrophobic silica airgel composite material and a preparation method thereof. Background technique [0002] Silica aerogels, considered the most promising nanoporous insulation materials, were first synthesized in 1931. The porosity is as high as 99.8%, which also endows airgel with special properties, such as ultra-high specific surface area (up to 1000㎡ / g), extremely low thermal conductivity (as low as 12mw / m / k) and density (3 ~500kg / m 3 ). The main component of silica airgel is silica (accounting for 87% of the total mass of the earth's crust), which has no pollution to the environment, is environmentally friendly and energy-saving, and meets the requirements of sustainable development of the contemporary ecological environment. [0003] At present, the main problems faced by the large-scale production and commercialization of silica airge...

Claims

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

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): D06M11/79C01B33/159
CPCC01B33/159D06M11/79D06M2200/12D06M2200/30
Inventor 李治张艳邓云猛武晓旭刘琼
Owner CENT SOUTH UNIV