Silicon rubber oxygen-enriched film doped silicon dioxide and preparation method thereof

A silicone rubber oxygen-rich membrane, silica technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation and other directions, can solve problems such as unfavorable industrial applications, aging resistance and poor acid and alkali resistance, and achieve film formation. The effect of improving performance and oxygen enrichment performance

Inactive Publication Date: 2008-05-28
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it has poor aging resistance and acid and alkali resistance, which is not conducive to industrial application

Method used

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  • Silicon rubber oxygen-enriched film doped silicon dioxide and preparation method thereof
  • Silicon rubber oxygen-enriched film doped silicon dioxide and preparation method thereof
  • Silicon rubber oxygen-enriched film doped silicon dioxide and preparation method thereof

Examples

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Comparison scheme
Effect test

preparation example Construction

[0038] The preparation method of the silicone rubber oxygen-enriched membrane doped with silicon dioxide comprises: coating a coating on the polymer base film to form a composite membrane; the coating includes a vinyl silicone rubber and a silicon dioxide blend, or blends of hydroxyl-containing silicone rubber and silica;

[0039] When vinyl silicone rubber and silicon dioxide are blended, polysiloxane containing silicon hydrogen groups is used as a crosslinking agent, wherein the vinyl group of vinyl silicone rubber and the silicon hydrogen group of polysilane containing silicon hydrogen groups The molar ratio is 1:0.6-1.6; firstly disperse the silicon dioxide in the solvent evenly, and then add it to the uniformly mixed vinyl silicone rubber according to the proportion that the content of silicon dioxide in the solution is 2-50%. and cross-linking agent solution, stir at room temperature for 1-10 hours, add metal compound catalyst, which contains 1g of vinyl silicone rubber,...

Embodiment 1

[0055] Example 1: Add 10 parts of vinyl silicone rubber and 1 part of polysiloxane containing silicon hydrogen groups to 200 parts of n-pentane solvent and stir evenly; add 4 parts of fumed silica to 50 parts of n-pentane solvent Stir until evenly dispersed, add it to the solution of vinyl silicone rubber and polysiloxane containing silicon hydrogen group and stir for 1 hour, then add 0.02mL chloroplatinic acid composite catalyst and stir for 1 hour, after removing the surface foam, apply Spread it on the base film and cure it at 80°C for 1 hour to obtain an oxygen-enriched film. Under 0.075MPa vacuum degree and 25°C, with air as the gas source, the oxygen concentration in the test enriched oxygen is 30.5%, and the flux of enriched oxygen is 245mL / (min·m 2 · KPa).

Embodiment 2

[0056] Example 2: Add 10 parts of vinyl silicone rubber and 1 part of polysiloxane containing silicon hydrogen groups into 200 parts of n-pentane solvent and stir evenly; add 4 parts of fumed silica into 50 parts of n-pentane solvent Stir until evenly dispersed, add it to the solution of vinyl silicone rubber and polysiloxane containing silicon hydrogen groups and stir for 1 hour, add 0.03mL chloroplatinic acid catalyst and stir for 1 hour, remove the surface foam, and apply Spread it on the base film and cure it at 80°C for 1 hour to obtain an oxygen-enriched film. Under a vacuum of 0.075MPa and 25°C, with air as the gas source, the oxygen concentration in the test enriched oxygen is 30.5%, and the flux of the enriched oxygen is 243mL / (min·m 2 · KPa).

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Abstract

The invention discloses a silicon rubber oxygen enrichment membrane doped silicon dioxide and the preparation method thereof. The application fields mainly relate to the preparation of oxygen-enriched air with high concentration oxygen and high concentration N2, the recycling of organic vapor, the purification of natural gas and the recycling of hydrogen. According to the technical proposal provided by the invention, the silicon rubber oxygen enrichment membrane doped silicon dioxide (SiO2) comprises: a polymer basement membrane is coated with a coating to form a composite membrane, wherein the coating comprises vinyl silicon rubber and silicon dioxide blend or hydroxyl silicon rubber and silicon dioxide blend; when the vinyl silicon rubber and the silicon dioxide are mixed together, the polysilane with silicon hydrogen radical is used as a cross linking agent and the catalyst of organic-metallic compound is added, wherein the quality of the catalyst of organic-metallic compound added into the solution having the vinyl silicon rubber of 1g is 0.01 mL to 1.0 mL; and a spatial reticular structure is formed by curing and cross linking at 10 to 120 DEG C.

Description

technical field [0001] The invention discloses an oxygen-enriched membrane prepared by blending silicone rubber and silicon dioxide. The main fields of application are the preparation of oxygen-enriched air containing high concentration of oxygen, the preparation of high concentration of N 2 , Organic vapor recovery, natural gas purification, hydrogen recovery. Background technique [0002] Membrane gas separation technology has the characteristics of simple equipment, no pollution to the environment, low investment, remarkable separation effect, and wide application. It has attracted domestic and foreign attention in recent years and is a popular and important scientific research and development project. Membrane gas separation technology has been a research and development hotspot for many years because it does not involve a phase change process and the operating cost is very low. Industrially developed countries call it "creative technology of resources". An ideal gas ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/70
Inventor 孙余凭周小兰
Owner JIANGNAN UNIV
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