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Hydrophobic material permeability composite material, preparation method thereof and use thereof

A composite material and material permeation technology, applied in the field of material permeable composite materials, can solve problems such as expensive and impossible

Inactive Publication Date: 2009-05-06
EVONIK DEGUSSA GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, hydrophobization of large areas with CVD-techniques is not possible or expensive

Method used

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  • Hydrophobic material permeability composite material, preparation method thereof and use thereof

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Experimental program
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Effect test

Embodiment 11

[0061] Embodiment 1.1 prepares composite material by the method described in PCT / EP98 / 05939

[0062] 120 g of titanium tetraisopropoxide were stirred with 140 g of deionized ice under vigorous stirring until the formed precipitate was finely dispersed. After adding 100 g of 25% hydrochloric acid and stirring until the phase became clear, 280 g of alpha-alumina of the type CT3000SG from the company Alcoa were added and stirred for several days until the aggregates were dissolved. The suspension is then applied in a thin layer onto a wire mesh and cured at 550° C. within a short time.

Embodiment 12

[0063] Example 1.2.a Hydrophobization of formed composites

[0064] The composite material prepared according to Example 1.1 was immersed in a solution consisting of 1% Dynasilan F 8261, 2% demineralized water acidified to pH 2.5 with acetic acid and 97% ethanol. The solution was stirred at room temperature for 5 hours before use. After allowing the clear solution to drop, the composite material can be dried at 80°C-150°C before application.

Embodiment 12

[0065] Example 1.2.b Hydrophobization of the formed composite

[0066] The composite material prepared according to Example 1.1 was immersed in a solution consisting of 5% methyltriethoxysilane, 0.5% of 35% hydrochloric acid, 40% ethanol and 54.5% demineralized water. The solution was stirred at room temperature for approximately 10 minutes before use. After allowing the clear solution to drop, the composite material can be dried at 80°C-150°C before application.

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Abstract

The invention relates to a hydrophobic substance osmosis composite material, a method for preparing the hydrophobic substance osmosis composite material, and application of the composite material in various technologies. The hydrophobic substance osmosis composite material is known for a long time. If a substance passes through by means of gas or vapor and does not pass through by means of liquid, materials which are made of plastics such as Gore-Tex and other organic polymers are particularly used. The materials have the defect that the materials can be only used within a limited temperature range. The composite material has the characteristic of high heat resistance due to the fact that the composite material is made of inorganic materials. Because the composite material can be prepared by the sol-gel technology, the composite material is simple to prepare. The composite material can be used as a membrane during the process of oxidation of aromatics, for example, the composite material is used as the membrane when benzene is directly oxidized into phenols.

Description

technical field [0001] The invention relates to a material-permeable composite material with hydrophobic properties, a preparation method and application of the material-permeable composite material. Background technique [0002] Hydrophobic species permeable materials have long been known. It is mainly mentioned here that the polytetrafluoroethylene ( ), membranes made of other organic polymers may also be mentioned. The membrane is suitable for a wide range of applications in which it is important that substances pass through the porous material only in gaseous or vapor form and not as a liquid. Substances of this type are produced, for example, by stretching polytetrafluoroethylene membranes, in which microscopic clefts are formed through which vapors or gases can pass. Small water droplets can be retained by the hydrophobic material because the pores are impermeable to the small water droplet due to the high surface tension and the non-wettable nature of the surface ...

Claims

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Application Information

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IPC IPC(8): C08J5/00C08K3/00C08L23/00C08L27/06C08L25/06C08L27/18C08L33/00C08L79/08B01D61/36
Inventor C·海英G·霍佩尔B·彭思
Owner EVONIK DEGUSSA GMBH