A gas phase hydrophobic device
A hydrophobic and gas-phase technology, which is applied in airgel preparation, chemical instruments and methods, colloid chemistry, etc., can solve problems such as the dead angle of vapor diffusion of hydrophobizing reagents, unstable thermal performance of airgel, and failure of hydrophobizing process, etc., to achieve Improved hydrophobization efficiency, strong designability, and no reaction dead angle
Active Publication Date: 2017-02-22
海鹰空天材料研究院(苏州)有限责任公司
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Problems solved by technology
[0007] The problems of the above method are: the amount of solvent and hydrophobizing agent used in patent CN201080030822.4 is large, and it needs to be refluxed for a long time, and the process is complicated, which causes the thermal performance of the airgel to be unstable
In the manufacture of large-scale airgel components, or in the manufacture of complex components, it is easy to form a dead angle for the diffusion of the hydrophobizing agent vapor in the container, resulting in the failure of the hydrophobizing process
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[0036] The present invention as figure 1 As shown, it includes a main tank, a gas delivery pump and a bracket 30, the bracket 30 is placed in the main tank, and the airgel product to be hydrophobized is placed on the bracket 30.
[0037] main tank as figure 1 As shown, it is the main component that contains the non-hydrophobic aerogel and undergoes hydrophobization. It is constructed as a metal container with a flange, and is mainly made of stainless steel, manganese steel and other materials. The main tank body includes a tank body body 20 and a tank body cover 11, which are connected by a flange. Several gas output pipelines 21 with valves 22 are evenly distributed in the upper part of the tank body 20, and several gas input pipelines 28 with valves are evenly distributed in the lower part of the tank body 20. The gas at the bottom of the valve enters the main pipe 24, and the bottom is also provided with a hydrophobizing reagent inlet 23 with a valve. 20 are connected me...
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The invention provides a gas-phase hydrophobization device which comprises a main tank body, a gas delivery pump and a bracket, wherein the bracket is arranged in the main tank body; a to-be-dewatered aerogel piece is arranged on the bracket; the main tank body comprises a tank body main body and a tank body cover; multiple gas output pipelines are uniformly distributed on the middle upper part of the tank body main body, and are connected with the gas inlet end of the gas delivery pump by virtue of a pipeline; multiple gas input pipelines are uniformly distributed on the lower part of the tank body main body, and are connected with the gas outlet end of the gas delivery pump by virtue of a pipeline; a bottom gas entry main pipeline is arranged in the bottom center of the tank body main body and is connected with the gas outlet end of the gas delivery pump by virtue of a pipeline; a hydrophobization reagent inlet is formed in the bottom of the tank body main body; the gas input pipelines are connected with the tank body main body along the tangential direction of the tank body main body; and reflux of hydrophobization reagent steam is formed in the main tank body by virtue of the gas delivery pump. With the adoption of the design of an internal gas forced cycle, the steam of the hydrophobization reagent can rapidly diffuse in the device, so that the dead angle is eliminated, the diffusion time and the reaction time are shortened, and the hydrophobization efficiency is improved.
Description
technical field [0001] The invention relates to a gas-phase hydrophobic device, which belongs to the technical field of airgel preparation. Background technique [0002] Silica airgel is a nanoporous material formed by the mutual accumulation of silica colloidal particles with gas as the dispersion medium. It has the characteristics of low density, high porosity and high specific surface area. The skeleton structure of airgel composed of nano-scale particles can significantly reduce the solid-state heat conduction of the material; its nanopore diameter is smaller than the mean free path of gas molecules, which can limit the heat conduction of gas molecules, so the thermal conductivity of airgel is lower than that of still air Thermal conductivity is the solid material with the best thermal insulation performance known so far. [0003] Many research results have shown that when the diameter of the pores in the material is less than 60nm, that is, less than the free path of m...
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IPC IPC(8): B01J13/00
CPCB01J13/0091
Inventor 邹军锋艾素芬简文政隋鹏宋艳艳詹万初
Owner 海鹰空天材料研究院(苏州)有限责任公司