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Silicon rubber/gadoleic acid cholesterol ester liquid crystal cross linking membrane and preparation method and applications thereof

A technology of cholesteryl enoate and silicone rubber, which is applied in the field of functional polymer membrane materials, can solve the problems of small molecular liquid crystal compounds entering the human body, improve blood compatibility and biocompatibility, improve air permeability, and avoid The effect of migration

Active Publication Date: 2012-09-05
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the polymer / liquid crystal composite material obtained by simply blending is in contact with the human body, under the action of factors such as blood and enzymes, the small molecule liquid crystal compound may break away from the polymer and enter the human body, which will have adverse effects on the human body

Method used

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  • Silicon rubber/gadoleic acid cholesterol ester liquid crystal cross linking membrane and preparation method and applications thereof
  • Silicon rubber/gadoleic acid cholesterol ester liquid crystal cross linking membrane and preparation method and applications thereof
  • Silicon rubber/gadoleic acid cholesterol ester liquid crystal cross linking membrane and preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Mix 0.025mol vinyl silicone rubber and 0.025mol cholesteryl crotonate liquid crystal, dissolve in tetrahydrofuran, stir evenly, and form a uniform solution with a mass fraction of 5.0%;

[0033] (2) Slowly add 0.012g of hydrogen-containing silicone oil and 0.006g of chloroplatinic acid solution dropwise in the uniform solution, and cross-link at room temperature for 10 minutes to obtain a transparent and viscous liquid crystal / silicone rubber solution for preliminary reaction;

[0034] (3) Use the framework to cast the silicone rubber / liquid crystal solution obtained in step (2) on a polyethylene terephthalate (PET) film to form a film, evaporate the solvent naturally, dry for 12 hours, peel off the film after solidification, and obtain the thickness A transparent and flexible silicone rubber / cholesteryl crotonate liquid crystal cross-linked film with a thickness of about 30 μm was dried in a vacuum desiccator at room temperature for one day and set aside.

[0035] ...

Embodiment 2

[0040] (1) Mix 0.025mol vinyl silicone rubber and 0.025mol cholesteryl pentenoate liquid crystal, dissolve with tetrahydrofuran, stir evenly, and form a uniform solution with a mass fraction of 2.5%;

[0041] (2) Slowly add 0.012g of hydrogen-containing silicone oil and 0.006g of chloroplatinic acid solution dropwise in the uniform solution, and cross-link at room temperature for 25 minutes to obtain a transparent and viscous liquid crystal / silicone rubber solution for initial reaction;

[0042](3) Use the frame to cast the liquid crystal / silicone rubber solution obtained in step (2) on a polyethylene terephthalate (PET) film to form a film, evaporate the solvent naturally, dry for 18 hours, peel off the film after solidification, and obtain the thickness A transparent and flexible silicone rubber / cholesteryl pentenoate liquid crystal cross-linked film with a thickness of about 40 μm was dried in a vacuum desiccator at room temperature for one day and set aside.

[0043] Since...

Embodiment 3

[0048] (1) Mix 0.025mol vinyl silicone rubber and 0.025mol cholesteryl undecylenate liquid crystal, dissolve with tetrahydrofuran, stir evenly, and form a uniform solution with a mass fraction of 12.5%;

[0049] (2) Slowly add 0.012g of hydrogen-containing silicone oil and 0.006g of chloroplatinic acid solution dropwise in the uniform solution, and cross-link at room temperature for 20 minutes to obtain a transparent and viscous silicone rubber / liquid crystal solution for initial reaction;

[0050] (3) Cast the silicone rubber / liquid crystal solution obtained in step (2) on a polyethylene terephthalate (PET) film to form a film using a frame, naturally evaporate the solvent, dry for 24 hours, and carefully peel off the film after solidification to obtain A transparent and flexible silicone rubber / cholesteryl undecylenate liquid crystal cross-linked film with a thickness of about 30 μm. Dry in a vacuum desiccator at room temperature for one day and set aside. The above reactio...

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Abstract

The invention discloses a silicon rubber / gadoleic acid cholesterol ester liquid crystal cross linking membrane and a preparation method and applications thereof. The preparation method includes the following steps of: (1) mixing vinylsiloxane rubber with the gadoleic acid cholesterol ester liquid crystal, dissolving by tetrahydrofuran, and stirring to form uniform solution; (2) dropping a cross linker and a catalyst and conducting initial cross linking reaction at room temperature to obtain silicon rubber / liquid crystal solution; and (3) casting the silicon rubber / liquid crystal solution on polyethylene glycol terephthalate pellicle to form a membrane, drying under natural conditions to eliminate the tetrahydrofuran solvent, and striping the membrane from the pellicle after coagulation toobtain a membrane product. The invention combines the gadoleic acid cholesterol ester liquid crystal into a cross-linked silicon rubber membrane in a covalent bond way, thus not only avoiding the migration of micromolecule liquid crystal and improving the biocompatibility and antihemolysis property of the silicon rubber membrane, but also increasing the elasticity and strength of the silicon rubber membrane. The invention offers a new improvement method and reference for the application of silicon rubber membrane materials in biomedical engineering.

Description

technical field [0001] The invention relates to a silicone rubber / cholesteryl enoate liquid crystal crosslinked film, a preparation method and application thereof, and belongs to the field of functional polymer film materials. Background technique [0002] Silicone rubber products are non-toxic, non-polluting, non-coagulant, non-carcinogenic, non-mutagenic, good compatibility with the human body and good aging resistance, and can be used as biological materials for long-term implantation into the human body. Generally speaking, silicone rubber has good biocompatibility, but some studies have shown that prolonged contact of silicone rubber with blood can lead to different degrees of coagulation. The main reason may be that the surface tension between the surface of the silicone rubber and the blood is too large, which destroys the platelets in the blood and releases coagulation factors, which finally leads to coagulation. In addition, due to the small interaction between the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08G77/38
Inventor 张子勇饶华新
Owner JINAN UNIVERSITY
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