Powder falling-resistant hydrophobic nano-aerogel heat-insulating sheet as well as preparation method and use method thereof

A nano-aerogel, powder-hydrophobic technology, applied in chemical instruments and methods, applications, household appliances, etc., can solve problems such as unfavorable operation of construction personnel and threat to construction personnel's health, etc. Sexual problems, the effect of low preparation cost

Pending Publication Date: 2019-03-22
GUIZHOU AEROSPACE WUJIANG MACHINERY & ELECTRICITYEQUIP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The prepared anti-powder-dropping hydrophobic nano-airgel thermal insulation sheet is applied to automobiles to solve the problem of thermal insulation of automobiles, so as to slow down the combustion of automobiles, ensure the safety of passengers, and solve the serious problem of powder-dropping of airgel composite materials at present. It is beneficial to construction personnel to operate and threaten the health of construction personnel, so as to overcome the deficiencies of existing technologies

Method used

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  • Powder falling-resistant hydrophobic nano-aerogel heat-insulating sheet as well as preparation method and use method thereof

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preparation example Construction

[0029] A kind of preparation method of anti-powder drop hydrophobic nano-airgel thermal insulation sheet of the present invention, the method comprises the following steps:

[0030] 1) Mix and impregnate glass fiber needle felt with sol to obtain sol glass fiber felt precursor; the basic characteristics of the glass fiber needle felt are thickness 3mm, density 90-115kg / m³; thickness 5mm, density 100-120kg / m³ m³; thickness 6mm, density 105~125kg / m³ or thickness 10mm, density 120~135kg / m³; the sol is made of tetraethyl orthosilicate as precursor, 99% industrial methanol, hydrolysis catalyst, additive according to 16: (96 ~128)︰5︰1 volume ratio, uniformly mixed and reacted for 5h.

[0031] 2) Aging and surface modification of the sol glass fiber mat precursor to obtain a sol fiber mat; the aging solution is ethanol or methanol solution, the aging temperature is 50~55°C, and the aging time is ≥40h , the aging agent is an alkylating agent.

[0032] 3) The sol glass fiber mat is s...

Embodiment 1

[0040] Ethyl orthosilicate, 99% industrial methanol, hydrolysis catalyst, and additives were uniformly mixed and reacted for 5 hours according to the volume ratio of 16:128:5:1 to obtain a sol; Mix and impregnate 120~135kg / m³ glass fiber needle mat with sol to obtain sol glass fiber mat precursor. Soak the sol glass fiber mat precursor in ethanol solution at 50~55℃ for 40 hours for aging treatment, then add alkylating agent for surface treatment to obtain sol fiber mat. The sol glass fiber mat was subjected to supercritical CO 2 Drying treatment, drying temperature is 53°C, drying pressure is 14.5MPa, CO 2 The gas flow rate is 2600kg / h, and the drying time is 5.5h to obtain a hydrophobic nano airgel thermal insulation material. The hydrophobic nano-airgel thermal insulation material is processed according to the specifications of length × width × thickness = 1500mm × 600mm × 10mm, and the hydrophobic nano-airgel thermal insulation material with a fixed size is obtained. The...

Embodiment 2

[0042] Ethyl orthosilicate, 99% industrial methanol, hydrolysis catalyst, and additives were uniformly mixed and reacted for 5 hours according to the volume ratio of 16:112:5:1 to obtain a sol; the length was 61300mm, the width was 1500mm, and the thickness was 3mm. Mix and impregnate 90~115kg / m³ glass fiber needle mat with sol to obtain sol glass fiber mat precursor. Soak the sol glass fiber mat precursor in ethanol solution at 50-55°C for 40h for aging treatment, and then add an alkylating agent for surface modification to obtain the sol fiber mat. The sol glass fiber mat was subjected to supercritical CO 2 Drying treatment, drying temperature is 55°C, drying pressure is 14MPa, CO 2 The gas flow rate is 2500kg / h, the drying time is 3h, and the hydrophobic nano-airgel thermal insulation material is obtained. The hydrophobic nano-airgel thermal insulation material is processed according to the specifications of length × width × thickness = 1500mm × 1200mm × 3mm, and the hydr...

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Abstract

The invention discloses a powder falling-resistant hydrophobic nano-aerogel heat-insulating sheet as well as a preparation method and a use method thereof. The preparation method comprises the following steps: step 1) mixing and immersing a glass fiber needled mat with a sol to obtain a sol glass fiber mat precursor; step 2) aging and surface-modifying the sol glass fiber mat precursor to obtain asol fiber mat; step 3) performing supercritical CO2 drying treatment on the sol glass fiber mat to obtain a hydrophobic nano-aerogel heat-insulating material; step 4) performing profile processing onthe hydrophobic nano-aerogel heat-insulating material to obtain a sized hydrophobic nano-aerogel heat-insulating material; and step 5) pasting a film on a surface of the sized hydrophobic nano-aerogel heat-insulating material to obtain the powder falling-resistant hydrophobic nano-aerogel heat-insulating sheet. Compared with a method for attaching a flexible coating to the surface adopted at present, the preparation method provided by the invention has advantages of low cost, high efficiency and simple industry, and well solves popularization and application of aerogel fiber mat products.

Description

technical field [0001] The invention relates to an anti-powder drop hydrophobic nano-airgel heat insulation sheet, a preparation method and a use method, and belongs to the technical field of nano-material production. Background technique [0002] The safety of automobiles is an important issue for our country as a big country in the automobile industry. In recent years, the frequency of automobile safety accidents has remained high for a long time, and the most serious and frequent occurrence of automobile safety accidents is automobile combustion accidents. If the car runs continuously for a long time, the tail engine and the exhaust pipe will generate a lot of heat and the temperature will be very high, which will easily cause the car to burn. When a car has a combustion accident, the ignition point is generally concentrated in the engine compartment. Since the interior of the car is mostly flammable organic substances, the fire can easily spread to the passenger compart...

Claims

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Application Information

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IPC IPC(8): B32B17/02B32B17/12B32B33/00B32B7/12B32B37/12C01B33/145
CPCC01B33/145B32B5/02B32B5/26B32B7/12B32B17/067B32B33/00B32B37/1207B32B2037/1215B32B2307/3065B32B2307/304B32B2605/08B32B2457/10Y02P20/54
Inventor 水世显田冠宇曹勇
Owner GUIZHOU AEROSPACE WUJIANG MACHINERY & ELECTRICITYEQUIP
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