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Modification method for in situ polymerization of pyrrole on surfaces of carbon fibers

An in-situ polymerization and modification method technology, applied in the direction of carbon fiber, fiber treatment, chemical instruments and methods, etc., can solve the problems of no further performance improvement, achieve strong adsorption characteristics, good biocompatibility, and avoid eutrophication Effect

Inactive Publication Date: 2017-08-22
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this kind of sizing agent only improves the dispersion performance of carbon fiber in the water phase, and does not further improve its other performance in water treatment, such as adsorption characteristics.

Method used

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  • Modification method for in situ polymerization of pyrrole on surfaces of carbon fibers
  • Modification method for in situ polymerization of pyrrole on surfaces of carbon fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Add 3L of deionized water into a 5L glass container, add 10g of pyrrole monomer, disperse it after stirring, and control the temperature at 4°C with a water bath, then place 1000.0g of the woven carbon fiber in the glass container and let it stand for 2h. Then add 1mol / L FeCl 3 Solution 348mL, fully stirred and kept for 24h, so that the reaction is complete. Then use 5M NaOH to adjust the pH value of the reaction solution to 7.0, remove the reaction solution, add water to rinse once; then take out the fibers, drain the water and bake in an oven at 105°C overnight until constant weight, then weigh with a balance The total weight of the obtained fibers was 1008.6 g, which indicated that most of the pyrrole had polymerized on the surface of the fibers.

Embodiment 2

[0032] Add 3L of deionized water into a 5L glass container, add 20g of pyrrole monomer, disperse it after stirring, and control the temperature at 4°C with a water bath, then place 1000.0g of the woven carbon fiber in the glass container and let it stand for 2h. Then add 0.5mol / L of (NH 4 ) 2 S 2 o 8 Solution 348mL, fully stirred and kept for 24h, so that the reaction is complete. Then use 5M NaOH to adjust the pH value of the reaction solution to 7.0, remove the reaction solution, add water to rinse once; then take out the fibers, drain the water and bake in an oven at 105°C overnight until constant weight, then weigh with a balance The total weight of the obtained fiber was 1018.6 g, which indicated that most of the pyrrole had been polymerized on the surface of the fiber, and the in-situ polymerization of pyrrole was successful.

Embodiment 3

[0034] Add 0.2L of deionized water into a 5L glass container, add 10g of pyrrole monomer, disperse it after stirring, and control the temperature at 60°C with a water bath, then place 20.0g of the woven carbon fiber in the glass container and let it stand for 0.5h . Then add 1mol / L FeCl 3 solution, FeCl 3 FeCl in solution 3 The molar ratio to pyrrole monomer is 1:1; fully stir and keep warm for 48h to complete the reaction. Then use 5M NaOH to adjust the pH value of the reaction solution to 7.0, remove the reaction solution, add water to rinse once; then take out the fibers, drain the water and bake in an oven at 105°C overnight until constant weight, then weigh with a balance The resulting fiber had a total weight of 28.8 g, which indicated that most of the pyrrole had polymerized on the surface of the fiber.

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PUM

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Abstract

The invention discloses a modification method for in situ polymerization of pyrrole on surfaces of carbon fibers. The method comprises the following steps of: 1) at the temperature of 10 DEG C below zero to 60 DEG C, mixing the carbon fibers with a pyrrole aqueous dispersing liquid, wherein the mass ratio of the carbon fibers to pyrrole is (2-2000): 1 and the mass ratio range of water to carbon fibers is 2-10; putting the mixture which is mixed, wherein the surfaces of the carbon fibers are in full contact with pyrrole monomers and the pyrrole monomers are adsorbed to the surfaces of the carbon fibers; 2) adding a solution of an oxidant to realize chemical oxidizing polymerization, wherein the molar ratio of the oxidant and the pyrrole monomers is 1: (0.05-3), and performing a continuo reaction at the temperature of 10 DEG C below zero to 30 DEG C; 3) after reaction, adjusting the pH value till the mixture is neutral; and 4) taking the carbon fibers out of a reaction liquid, rinsing the carbon fibers with clean water, draining off moisture, and drying to obtain a carbon fiber / polypyrrole composite material. The polypyrrole has very good biocompatibility, and through research finding, polypyrrole combined with a carrier has a very good adsorption characteristic due to a doping-de-doping characteristic, so that the composite material has broad spectrum adsorption on pollutants in sewage.

Description

technical field [0001] The invention belongs to the fields of chemistry and water treatment, and relates to a method for preparing a carbon fiber / polypyrrole composite material in which a layer of polypyrrole is formed by in-situ polymerization on the surface of a carbon fiber by a chemical polymerization method. Background technique [0002] The carbon fiber involved in the present invention refers to an inorganic fiber with a carbon content as high as 90%. Polyacrylonitrile fibers, viscose filament fibers, pitch fibers, etc. can be made into carbon fiber materials that are widely used at present after carbonization treatment of different degrees. Normally, the surface of carbon fiber is coated with a layer of 1-3μm epoxy resin, which is to improve the cohesion of carbon fiber bundles and form a smooth and flat protective film on the surface of monofilaments to prevent fiber wear and hair; The active surface obtained after surface treatment of carbon fiber can prevent the ...

Claims

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Application Information

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IPC IPC(8): D06M15/37B01J20/20B01J20/26C02F1/28D06M101/40
CPCB01J20/20D06M15/37C02F1/281C02F1/285B01J20/265D06M2101/40
Inventor 杨鸿辉冯江涛延卫
Owner XI AN JIAOTONG UNIV
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