High-performance bio-based composite film and preparation method thereof

A composite film and bio-based technology, applied in the direction of conjugated synthetic polymer artificial filament, cellulose/protein conjugated artificial filament, non-woven fabric, etc., can solve the problem of non-renewable, biocompatibility and Degradability, medical materials are not easy to pass through cells, hinder drug release and absorption, etc., to achieve the effects of avoiding infection, adhesion and swelling, good blood compatibility, and increased storage modulus

Inactive Publication Date: 2018-11-27
BEIJING INSTITUTE OF CLOTHING TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some scholars have prepared composite membranes by casting cellulose nanocrystals and polyurethane and other high polymers by casting and evaporating solvents. The mechanical strength of the composite membranes can be improved, but the porosity of the composite membranes is extremely low. As a medical material, it is difficult to pass through cells and hinder drug release and absorption
Later, some scholars used cellulose nanocrystals and polyacrylonitrile to prepare fiber membranes by electrospinning technology, which improved the problem of low porosity, but it is a synthetic polymer fiber membrane, which does not have renewability, biocompatibility and Degradability, poor mechanical strength

Method used

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  • High-performance bio-based composite film and preparation method thereof
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  • High-performance bio-based composite film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Add 0.025g of cellulose nanocrystals to 15ml of dichloromethane, place the solution on a stirring table and stir for 6h until a uniform cellulose nanocrystal mixture is obtained, and the cellulose nanocrystals in the cellulose nanocrystal mixture The mass fraction is 0.13%. (2) Add 2.04g polylactic acid to the cellulose nanocrystal mixture, and stir at room temperature for 12 hours to obtain a uniformly dispersed polylactic acid / cellulose nanocrystal mixture, and the fibers in the polylactic acid / cellulose nanocrystal mixture The mass fraction of prime nanocrystals is 0.12%, and the mass fraction of polylactic acid is 9.7%. (3) Add 5ml N-N dimethylformamide in polylactic acid / cellulose nanocrystal mixed solution, after stirring 2h, obtain spinning solution, the massfraction of cellulose nanocrystal in the spinning solution is 0.1%, polylactic acid The mass fraction is 8.0%. The film was spun under the technological conditions of spinning voltage 15kv, spinning dis...

Embodiment 2

[0032] (1) Add 0.076g of cellulose nanocrystals to 15ml of dichloromethane, place the solution on a stirring table and stir for 6h until a uniform cellulose nanocrystal mixture is obtained, and the cellulose nanocrystals in the cellulose nanocrystal mixture The mass fraction is 0.40%. (2) Add 2.29g polylactic acid to the cellulose nanocrystal mixed solution, and stir at room temperature for 24 hours to obtain a uniformly dispersed polylactic acid / cellulose nanocrystalline mixed solution, and the fibers in the polylactic acid / cellulose nanocrystalline mixed solution The mass fraction of prime nanocrystals is 0.36%, and the mass fraction of polylactic acid is 10.8%. (3) Add 5ml N-N dimethylformamide in polylactic acid / cellulose nanocrystal mixed solution, after stirring 3h, obtain spinning solution, the massfraction of cellulose nanocrystal in the spinning solution is 0.3%, polylactic acid The mass fraction is 9.0%. The film was spun under the conditions of a spinning voltage ...

Embodiment 3

[0035] (1) Add 0.126g of cellulose nanocrystals to 15ml of dichloromethane, place the solution on a stirring table and stir for 6h until a uniform cellulose nanocrystal mixture is obtained, and the cellulose nanocrystals in the cellulose nanocrystal mixture The mass fraction is 0.66%. (2) Add 2.29g polylactic acid to the cellulose nanocrystal mixed solution, and stir at room temperature for 24 hours to obtain a uniformly dispersed polylactic acid / cellulose nanocrystalline mixed solution, and the fibers in the polylactic acid / cellulose nanocrystalline mixed solution The mass fraction of prime nanocrystals is 0.59%, and the mass fraction of polylactic acid is 10.8%. (3) Add 5ml N-N dimethylformamide in polylactic acid / cellulose nanocrystal mixed solution, after stirring 3h, obtain spinning solution, the massfraction of cellulose nanocrystal in the spinning solution is 0.5%, polylactic acid The mass fraction is 9.0%. The spinning conditions are the same as in Example 2, and the...

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Abstract

The invention discloses high-performance bio-based composite film and a preparation method thereof, and belongs to the technical field of functional materials. The method mainly adopts polylactic acidas matrix, and uses cellulose nanocrystal as a reinforcing filler, composite fiber film is prepared by an electrospinning method, the addition of the cellulose nanocrystals can increase the storage modulus of the composite film by up to 500%, after water is absorbed, the storage modulus can be increased by up to 900%, the storage modulus of the composite film is obviously improved, pores are larger, cells can be effectively adsorbed and grown on the fiber film, the mechanical strength is also improved, and the addition of the the cellulose nanocrystals further broadens the application of polylactic acid in the field of biomedicine. The method uses an acid hydrolysis method to prepare the cellulose nanocrystals, cellulose raw material sources are wide, the acid hydrolysis method is simpleand easy to operate, and a product price is low. The film functions as a medical stent to promote drug absorption and cell growth.

Description

Technical field: [0001] The invention relates to a high-performance bio-based composite membrane and a preparation method thereof, belonging to the technical field of functional materials. Background technique [0002] Polylactic acid is a biodegradable material with good comprehensive properties. It can be used as medical sutures, absorbable anti-adhesion materials and biological scaffolds in the biomedical field. However, polylactic acid-based biomedical anti-adhesion and medical scaffold materials have problems such as low mechanical strength, high manufacturing cost, and high price, which affect their promotion and application value. Moreover, polylactic acid has poor water absorption performance, which is not conducive to the entry of biological cells into membranes. gaps for adhesion and growth. The water in the human body accounts for about 70%. By improving the water absorption performance of polylactic acid, it can enhance the mechanical properties of composite mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/728D04H1/4382D01F8/02D01F8/14
CPCD01F8/02D01F8/14D04H1/4382D04H1/728
Inventor 贾清秀周孟娇滕晓波杨思彤
Owner BEIJING INSTITUTE OF CLOTHING TECHNOLOGY
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