Polylactic acid/polyaniline/nanocrystalline cellulose composite conductive film and preparation method thereof

A nano-crystal, composite conductive technology, applied in the field of composite materials, can solve the problems of poor processing performance of composite materials, affecting the efficacy of composite materials, etc., to improve toughness, good biocompatibility and degradability, and improve comprehensive mechanical properties. Effect

Active Publication Date: 2019-01-04
LONGYOU COUNTY JINLONG PAPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, by-products with certain toxicity will appear in the reaction process of the emulsion polymerization method, and the forming and processing performance of the obtained composite material is poor, which affects the efficacy of the composite material in biomedical applications

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Step (1): Prepare solid nano-microcrystalline cellulose. Weigh a certain amount of microcrystalline cellulose and place it in a three-necked flask, add a freshly prepared sulfuric acid solution with a mass fraction of 65%, stir in a water bath at 50 ºC for 90 minutes, add a certain amount of distilled water to dilute after the reaction is completed, and dilute The final suspension is subjected to high-speed centrifugation, dialysis, and freeze-drying to obtain solid nano-microcrystalline cellulose.

[0027] Step (2): Preparation of conductive polyaniline doped with sulfosalicylic acid. With the molar ratio of aniline and ammonium persulfate as 0.8, a certain amount of aniline and ammonium persulfate were dissolved in 0.1 mol / L sulfosalicylic acid respectively, and mixed quickly and evenly, then left to stand at room temperature for 24 h , the resulting precipitate was vacuum filtered, washed and separated, and vacuum dried to obtain dark green doped conductive polyanil...

Embodiment 2

[0032] Step (1): Prepare solid nano-microcrystalline cellulose. Weigh a certain amount of microcrystalline cellulose and place it in a three-necked flask, add a freshly prepared sulfuric acid solution with a mass fraction of 65%, stir in a water bath at 50 ºC for 90 minutes, add a certain amount of distilled water to dilute after the reaction is completed, and dilute The final suspension is subjected to high-speed centrifugation, dialysis, and freeze-drying to obtain solid nano-microcrystalline cellulose.

[0033] Step (2): Preparation of conductive polyaniline doped with sulfosalicylic acid. With the molar ratio of aniline and ammonium persulfate as 0.8, a certain amount of aniline and ammonium persulfate were dissolved in 0.1 mol / L sulfosalicylic acid respectively, and mixed quickly and evenly, then left to stand at room temperature for 24 h , the resulting precipitate was vacuum filtered, washed and separated, and vacuum dried to obtain dark green doped conductive polyanil...

Embodiment 3

[0038] Step (1): Prepare solid nano-microcrystalline cellulose. Weigh a certain amount of microcrystalline cellulose and place it in a three-necked flask, add a freshly prepared sulfuric acid solution with a mass fraction of 65%, stir in a water bath at 50 ºC for 90 minutes, add a certain amount of distilled water to dilute after the reaction is completed, and dilute The final suspension is subjected to high-speed centrifugation, dialysis, and freeze-drying to obtain solid nano-microcrystalline cellulose.

[0039] Step (2): Preparation of conductive polyaniline doped with sulfosalicylic acid. With the molar ratio of aniline and ammonium persulfate as 0.8, a certain amount of aniline and ammonium persulfate were dissolved in 0.1 mol / L sulfosalicylic acid respectively, and mixed quickly and evenly, then left to stand at room temperature for 24 h , the resulting precipitate was vacuum filtered, washed and separated, and vacuum dried to obtain dark green doped conductive polyanilin...

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Abstract

The invention discloses a polylactic acid/polyaniline/nanocrystalline cellulose composite conductive film and a preparation method thereof. The composite conductive film comprises, by weight, 100 parts of polylactic acid, 15-25 parts of polyaniline, 0-6 parts of nanocrystalline cellulose and 10 parts of polyethylene glycol. The preparation method is mainly based on a solution blending method, N,N-dimethylformamide is used as a solvent, polylactic acid is used as a base material, polyaniline is used as a conductive material, nanocrystalline cellulose is used as a reinforcing agent, and polyethylene glycol is used as a solvent and a lubricant. By magnetic stirring, ultrasonic dispersion, filtration separation, vacuum drying, cast molding and other processes, the polylactic acid/polyaniline/nanocrystalline cellulose composite conductive film is prepared. The prepared composite conductive film is free of toxins and environmentally friendly, the forming process is simple, the material sources are rich, and the film is good in mechanical properties and conductivity and excellent in biocompatibility and biodegradability.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a polylactic acid / polyaniline / nano microcrystalline cellulose composite conductive film and a preparation method thereof. Background technique [0002] Nanoparticles are dispersed in the composite material system, because of their small particle size, large specific surface area, and large proportion of atoms in the surface layer, they can theoretically be fully adsorbed and bonded with the polymer in the system, and strengthen the particle and The interfacial bonding of the matrix can significantly improve the mechanical properties of the composite. As an abundant and environmentally friendly nanomaterial, nanocrystalline cellulose (NCC) has excellent mechanical and physicochemical properties, high crystallinity (>70%), and huge specific surface area (~70 m 2 / g), in addition, NCC also has good biocompatibility, biodegradability and stable chemical properties. At present,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L79/02C08L1/04C08L71/02C08K5/42C08J5/18
CPCC08J5/18C08J2367/04C08J2401/04C08J2471/02C08J2479/02C08K5/42
Inventor 唐艳军王小宇
Owner LONGYOU COUNTY JINLONG PAPER
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