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A kind of production process and production device of fiber composite airgel felt

An aerogel felt and fiber composite technology, used in ceramic products, other household appliances, household appliances, etc., can solve the problem of re-rolling, cumbersome winding process, difficult to control solvent volatilization and dripping, complicated and unsafe rolling /winding and other issues, to achieve the effect of realizing large-scale automated production, reducing organic material handling operations, and maintaining quality stability

Active Publication Date: 2019-07-12
纳诺科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are two shortcomings: one is that more containers are needed to meet the needs of gel compounding and aging in production at the same time; Organic silicon sources are often used to prepare precursors. The most commonly used ones are ethyl orthosilicate and methyl orthosilicate. This silicon source needs to use organic solvents during hydrolysis, and ethanol, methanol, etc. are also generated during hydrolysis. The solvent, the gel prepared by this kind of silicon source, itself contains a large amount of volatile organic solvents. During the process of splitting and winding, the dripping and volatilization of solvents are unavoidable. These factors have a great impact on production personnel and equipment. poses a certain risk to the environment
[0014] The above processes that are more suitable for large-scale production inevitably require the following material transfer links: Whole roll fiber material--gel compounding--aging--separation / winding--hanging-modification modification-lifting- ‐Drying a series of operations, in which there will be difficult-to-control solvent volatilization and dripping problems in gel lamination‐‐separation / winding‐‐hoisting, causing certain safety hazards
[0015] Based on the complexity of the above composite methods in production and application and related safety issues, the present invention has developed a composite gel process with controllable organic volatiles and drippings, eliminating the need for complicated and unsafe volume separation / collection Rolling, hoisting process, and combined with the subsequent drying process, the production process of airgel fiber composite felt can be completed safely and efficiently

Method used

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  • A kind of production process and production device of fiber composite airgel felt
  • A kind of production process and production device of fiber composite airgel felt
  • A kind of production process and production device of fiber composite airgel felt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] Press the fiberglass mat with the flexible interlayer of polyamide figure 2 Roll into a roll, hang it into the drying kettle, seal the drying kettle, and inflate and pressurize the bottom of the drying kettle, so that the small holes of the pallet are sealed. The alumina alcohol sol liquid is prepared in advance, mixed with sodium hydroxide aqueous solution in a certain proportion, and then added to the drying kettle through the liquid inlet on the upper part of the drying kettle until the glass fiber mat is fully saturated, and then the liquid inlet is closed. After standing for 30 minutes, the hydrolyzed liquid gels, and then standing for 50 minutes for aging. Open the bottom valve of the kettle, remove the gas to reduce pressure, and introduce carbon dioxide gas from the upper air inlet. The small holes of the support plate are open and gradually pressurized. to 12Mpa, and heated to 45°C, then through the carbon dioxide supercritical cycle drying process to remove t...

Embodiment 2

[0080] Press the PET fiber mat and the flexible interlayer made of polyacrylate figure 2 Roll into a roll, hang it into the drying kettle, seal the drying kettle, and inflate and pressurize the bottom of the drying kettle, so that the small holes of the pallet are sealed. The pre-prepared resorcinol-formaldehyde sol liquid was added to the drying kettle through the liquid inlet on the upper part of the drying kettle until the PET fiber felt was fully saturated, and then the liquid inlet was closed. After standing for 20 minutes, the hydrolyzate gelled, and then left standing for aging for 2 hours. The mixed fluid of carbon dioxide and acetone was introduced from the upper air inlet, gradually pressurized to 10Mpa, and heated to 50°C, and then through the carbon dioxide supercritical cycle drying process, the solvent in the gel was removed, and finally the isothermal pressure reduction process was carried out to reduce the temperature. After reaching normal pressure, open the...

Embodiment 3

[0082] Press the fiberglass mat with the flexible interlayer of polysiloxane figure 2 Roll into a roll, hang it into the drying kettle, seal the drying kettle, and inflate and pressurize the bottom of the drying kettle, so that the small holes of the pallet are sealed. Using ethyl orthosilicate and methyltriethoxysilane in a mass ratio of 4:6 as a mixed silicon source, ethanol as a solvent, and an aqueous sulfuric acid solution as a catalyst, a hydrolyzed solution is pre-prepared, and mixed with an aqueous sodium carbonate solution in a certain proportion, Through the liquid inlet on the upper part of the drying kettle, add it into the drying kettle until the glass fiber mat is fully saturated, and then close the liquid inlet. After standing for 15 minutes, the hydrolyzed liquid gelled, and then left standing for aging for 1 hour. Carbon dioxide gas was introduced from the upper air inlet, gradually pressurized to 15Mpa, and heated to 50 °C, and then the supercritical carbon ...

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Abstract

The invention discloses a production technology and a production device for a fiber composite aerogel felt. The production technology is characterized by comprising the following steps: rolling a fiber felt and a flexible sandwich material into one roll, forming a state that layers are separated from each other, and realizing a gelation process, an ageing process and a drying process in one closed system, so that the fiber composite aerogel felt is obtained. The production technology disclosed by the invention is high in intensification degree, can obviously improve production efficiency and is favorable for realizing large-scale automatic production of the aerogel fiber felt, the production cost of the aerogel fiber felt is reduced, fewer organic matters volatilize and drop in a production process, and the safety of the production process is improved.

Description

[0001] Technical field: [0002] The invention relates to a production process and a production device of a fiber composite aerogel felt, in particular to a safe and efficient production process in which gel composite, aging and drying are all completed in the same kettle, and no solvent volatilization leakage occurs. [0003] Background technique: [0004] Aerogel is a lightweight, porous, amorphous solid material with a particle size between 1-100nm and is a typical nanomaterial with a porosity of 80%-99.8%. Due to the specific porous nano-network structure of aerogel, it has very excellent performance, and its density is as low as 1kg / m 3 , with a specific surface area up to 1000m 2 / g or more, the thermal conductivity is extremely low, and the room temperature thermal conductivity can reach 0.012W / m·K. These properties of aerogel make it widely used in energy, electronics, environmental protection, medicine, aerospace, construction and scientific research. [0005] SiO ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B30/02C04B38/00C08L61/12C08L67/02C08L33/04C08J9/28
CPCC04B30/02C04B2201/32C08J9/28C08J2201/05C08J2205/026C08J2361/12C08J2467/02C08L61/12C08L2203/14C08L2205/03C08L2205/16C04B14/303C04B14/302C04B14/42C04B38/0045C04B14/064C04B14/46C08L67/02C08L33/04
Inventor 姜法兴林芬熊风周水林张利明姚献东
Owner 纳诺科技有限公司
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