Manufacturing method for coating silicon rubber/liquid crystal cross linking membrane on bi-component hollow fiber

A manufacturing method and technology of silicone rubber, applied in the field of biomedical engineering, can solve problems such as practical application limitations and restrictions, and achieve the effects of optimizing process conditions, improving integrity and uniformity, and shortening curing time

CN101538796AInactive Publication Date: 2009-09-23JINAN UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2009-09-23
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a manufacturing method for coating a silicon rubber / liquid crystal cross linking membrane on bi-component hollow fiber. The method includes the following steps of: (1) dissolving silicon rubber / gadoleic acid cholesterol ester liquid crystal and adding catalyst to make component A; (2) dissolving silicon rubber / gadoleic acid cholesterol ester liquid crystal and adding cross linker to make component B; and (3) dipping the hollow fiber first in the component A and then in the component B and obtaining a hollow fiber composite membrane coated with the silicon rubber / liquid crystal cross linking membrane on surface through heating, cross linking and solidification. The two components can react at room temperature to be solidified. To shorten the solidification time, heating process is adopted, and the thickness of a coated membrane is controlled simultaneously when the completeness and uniformity of the coated membrane are improved, thus being in line with the technical requirements of industrial continuous production. Aiming at the defects that the usage period of coating liquid in a single component is short, the hollow fiber coated membrane clings mutually easily and the continuous operation is difficult to realize in technology and the like, the invention develops the bi-component method coating technology of hollow fiber and provides a preparation method of continuous operation for the surface coating of the hollow fiber membrane.
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Description

technical field

[0001] The invention discloses a method for manufacturing a hollow fiber double-component coated silicone rubber / liquid crystal crosslinked membrane, which belongs to the field of biomedical engineering. The hollow fiber coated silicone rubber / liquid crystal crosslinked membrane can be used for the membrane assembly of an artificial lung manufacture. Background technique

[0002] Hollow fiber is the most basic supporting material of membrane oxygenator (commonly known as artificial lung), and it is the most basic support material for membrane oxygenator to absorb O 2 , exclude CO 2 most important channel. Therefore, the selection of hollow fibers and the surface coating of hollow fiber membranes are the most important steps in the design and manufacture of membrane oxygenators.

[0003] In the research and application of the membrane oxygenator, the membrane material coated on the surface of the hollow fiber plays the function of gas permeation and blood e...

Examples

Embodiment 1

[0021] Embodiment 1 Coating liquid concentration is to the influence experiment of film formation

[0022] Dissolving silicone rubber and cholesteryl acrylate liquid crystals with a vinyl molar mass content of 5% to 10% in tetrahydrofuran to form homogeneous solutions with concentrations of 2.5%, 5.0%, 7.5%, 10.0% and 12.5%, respectively, Add catalyst chloroplatinic acid solution, stir evenly to prepare component A of series concentration; in the tetrahydrofuran (THF) of silicon rubber and cholesteryl enoate liquid crystal which are respectively 2.5%, 5.0%, 7.5%, 10.0% and 12.5% ​​of the same above-mentioned concentration Add a crosslinking agent hydrogen-containing silicone oil into the solution, stir evenly to prepare component B with a series concentration. After dipping the thin plate and polyethersulfone hollow fiber through the solution of component A and component B respectively, the dipping time is 5s; then pass the thin plate and polyethersulfone hollow fiber through ...

Embodiment 2

[0027] Embodiment 2 Curing temperature is to the influence experiment of film formation

[0028] Dissolve silicone rubber and cholesteryl enoate liquid crystals with a vinyl molar mass content of 5% to 10% in tetrahydrofuran to form a uniform solution with a concentration of 5.0% by weight, add catalyst chloroplatinic acid solution, and stir evenly Prepare component A with a series of concentrations; add hydrogen-containing silicone oil cross-linking agent to the same THF homogeneous solution of silicone rubber and cholesteryl enoate liquid crystal with the above-mentioned concentration of 5.0% by weight, and stir evenly to form a series concentration of component B. After impregnating the polypropylene hollow fiber successively through the component A and component B solutions, the silicone rubber is cross-linked and cured by a heating device to obtain a hollow fiber composite membrane whose surface is coated with a uniform silicone rubber / liquid crystal cross-linked membrane...