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Method for preparing polyaniline surface modified conductive polyester chips

A technology of surface modification and polyester sheet, applied in the field of preparation of conductive polyester sheet, can solve problems such as weak intermolecular force, and achieve the effects of increasing surface area, increasing polar groups, and enhancing force

Inactive Publication Date: 2014-12-10
SHANDONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the above preparation process, the adsorption of aniline on the surface of polyester plays a key role, but this adsorption only relies on van der Waals force, and its intermolecular force is relatively weak

Method used

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  • Method for preparing polyaniline surface modified conductive polyester chips
  • Method for preparing polyaniline surface modified conductive polyester chips
  • Method for preparing polyaniline surface modified conductive polyester chips

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Deoil the polyester sheet with acetone, dry it and hydrolyze it in concentrated sulfuric acid solution (volume ratio of sulfuric acid to water: 4:1) for 2 minutes.

[0025] (2) Add the polyester flakes (60mg) obtained in step (1), 6g of aniline and 60mL of 3M hydrochloric acid solution into the four-necked flask in turn, and start the mechanical stirring to mix them thoroughly; after the temperature is lowered to 0-5°C, Slowly add 50 mL of ammonium persulfate (0.25:1 molar ratio to aniline) aqueous solution dropwise with a dropping funnel, and the dropwise addition is completed in 30 minutes; the reaction ends after 5 hours.

[0026] (3) Wash the polyester sheet prepared in step (2) with 0.1 mol / L hydrochloric acid and a large amount of water, and dry at room temperature.

[0027] The electrical conductivity of the prepared polyester sheet modified by polyaniline was 3.34×10 -3 S / cm.

Embodiment 2

[0029] (1) Deoil the polyester sheet with acetone, dry it and hydrolyze it in concentrated sulfuric acid solution (volume ratio of sulfuric acid to water: 4:1) for 2 minutes.

[0030] (2) Add the polyester flakes (60mg) obtained in step (1), 6g of aniline and 60mL of 2M hydrochloric acid solution into the four-neck flask in turn, and start the mechanical stirring to make them fully mixed; after the temperature drops to 0-5°C, Slowly add 50 mL of ammonium persulfate (0.5:1 molar ratio to aniline) aqueous solution dropwise with a dropping funnel, and the dropwise addition is completed in 30 minutes; the reaction ends after 5 hours.

[0031] (3) Wash the polyester sheet prepared in step (2) with 0.1 mol / L hydrochloric acid and a large amount of water, and dry at room temperature.

[0032] The electrical conductivity of the prepared polyester sheet modified by polyaniline was 3.33×10 -3 S / cm.

Embodiment 3

[0034] (1) Deoil the polyester sheet with acetone, dry it and hydrolyze it in concentrated sulfuric acid solution (volume ratio of sulfuric acid to water: 5:1) for 1 min.

[0035] (2) Add the polyester flakes (60mg) obtained in step (1), 6g of aniline and 60mL of 3M hydrochloric acid solution into the four-necked flask in turn, and start the mechanical stirring to make them fully mixed; after the temperature drops to 0-5°C, Slowly add 50 mL of ammonium persulfate (0.5:1 molar ratio to aniline) aqueous solution dropwise with a dropping funnel, and the dropwise addition is completed in 30 minutes; the reaction ends after 5 hours.

[0036] (3) Wash the polyester sheet prepared in step (2) with 0.1 mol / L hydrochloric acid and a large amount of water, and dry at room temperature.

[0037] The electrical conductivity of the prepared polyester sheet modified by polyaniline was 3.93×10 -3 S / cm.

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Abstract

The invention relates to a method for preparing polyaniline surface modified conductive polyester chips. The method comprises the following steps of: performing oil removal treatment on polyester chips by using acetone, drying, and then hydrolyzing in a concentrated sulfuric acid solution; sequentially adding the hydrolyzed polyester chips, aniline and a hydrochloric acid solution into a reactor, mixing uniformly, adjusting the temperature to be 0 to 5 DEG C, slowly dripping an aqueous solution of ammonium persulfate, and continuously reacting for 1 to 6 hours after dripping; and cleaning the obtained polyester chips by using hydrochloric acid and water, and drying at room temperature. According to the method, the surfaces of the polyester chips are subjected to acid hydrolysis before aniline adsorption and polymerization, so that on the one hand, the surface area of polyester is enlarged, and a large place and a large anchor point are provided for aniline adsorption; and on the other hand, polar groups are increased after hydrolysis of the polyester surface, and the acting force between the polyester matrix and the polyaniline molecules is enhanced, so that the aniline can be firmly adsorbed to the polyester surface.

Description

technical field [0001] The invention relates to the technical field of preparation of composite conductive polymer materials, in particular to a preparation method of a polyaniline-surface-modified conductive polyester sheet. Background technique [0002] Polyester is a general term for polymers obtained by polycondensation of polyols and polybasic acids, mainly referring to polyethylene terephthalate. It has superior physical and mechanical properties, such as: good mechanical properties, wear resistance, creep resistance, etc., and chemical resistance, so it has certain applications in industrial production. However, polyester has a high specific resistance and is a poor conductor of electricity, which will limit the wider application of polyester to a certain extent. In recent years, the preparation of polyesters (sheets, fibers, fabrics, films) with certain conductive properties has become the focus of research at home and abroad. [0003] Adsorption of a layer of cond...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/16C08J7/14C08L67/00C08L79/02C08G73/02
Inventor 茹淼焱邵国俊宋艳朵
Owner SHANDONG UNIV
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