Nano graphite flake/polyaniline composite club-shaped material and method for preparing same

A technology of nano-graphite and polyaniline, which is applied in the field of nano-rod composite materials and its preparation, can solve the problems of uniform dispersion of nano-graphite sheets, affecting the performance of composite materials, and large environmental pollution, so as to facilitate industrial production, high production efficiency, The effect of little environmental pollution

Inactive Publication Date: 2008-08-27
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems in the prior art that the nano-graphite sheets cannot be uniformly dispersed in the polymer at the nanometer level, which affects the performance of the composite material and the environmental pollution, and provides a graphite graphite sheet with good thermal and electrical properties Nano graphite flake / polyaniline composite rod material

Method used

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  • Nano graphite flake/polyaniline composite club-shaped material and method for preparing same
  • Nano graphite flake/polyaniline composite club-shaped material and method for preparing same
  • Nano graphite flake/polyaniline composite club-shaped material and method for preparing same

Examples

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Effect test

Embodiment 1

[0024] Example 1, 1 mL (about 1 g) of aniline distilled under reduced pressure and 2.5 g of ammonium persulfate were dissolved in 100 mL of sulfuric acid solution for acidification; Add nano-graphite flakes to ultrasound for about 20 minutes until they are evenly dispersed. Then, the above-mentioned ammonium persulfate solution was added dropwise into the aniline solution under ultrasonic conditions, and the temperature was kept at 25° C., and then ultrasonicated for 6 hours to ensure complete polymerization. Filter and wash until the filtrate is colorless, place the product in sulfuric acid solution and stir for 3 hours, then filter, wash once with deionized water to remove excess sulfuric acid, and then dry at 50°C for 12 hours to obtain nano-graphite flakes / polyaniline composite rod-shaped materials. The electrical conductivity of the composite rod material is 5.6 S / cm.

Embodiment 2

[0025] Example 2, 1 mL of aniline distilled under reduced pressure and 2.5 g of ammonium persulfate were dissolved in 100 mL of sulfuric acid solution respectively, the aniline solution was placed in an ultrasonic instrument for about 10 min, and then 0.008 g of nano graphite flakes were added for about 20 min to Disperse evenly. Then, the above-mentioned ammonium persulfate solution was added dropwise into the aniline solution under ultrasonic conditions, and the temperature was kept at 25° C., and then ultrasonicated for 6 hours to ensure complete polymerization. Filter and wash until the filtrate is colorless, place the product in sulfuric acid solution and stir for 3 hours, then filter, wash once with deionized water to remove excess sulfuric acid, and then dry at 50°C for 12 hours to obtain nano-graphite flakes / polyaniline composite rod-shaped materials. The electrical conductivity of the composite rod material is 6.4 S / cm.

Embodiment 3

[0026] Example 3, 1 mL of aniline distilled under reduced pressure and 2.5 g of ammonium persulfate were dissolved in 100 mL of sulfuric acid solution respectively, the aniline solution was placed in an ultrasonic instrument for about 10 min, and then 0.01 g of nano-graphite flakes were added to the ultrasonic for about 20 min, until Disperse evenly. Then, the above-mentioned ammonium persulfate solution was added dropwise into the aniline solution under ultrasonic conditions, and the temperature was kept at 25° C., and then ultrasonicated for 6 hours to ensure complete polymerization. Filter and wash until the filtrate is colorless, place the product in sulfuric acid solution and stir for 3 hours, then filter, wash once with deionized water to remove excess sulfuric acid, and then dry at 50°C for 12 hours to obtain nano-graphite flakes / polyaniline composite rod-shaped materials. The electrical conductivity of the composite rod material is 8.4 S / cm.

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Abstract

The invention discloses nano graphite slice/polyaniline composite rod-like material, which is prepared through respectively dissolving aniline and ammonium persulphate in acid solution to conduct acid-treatment, placing aniline acid solution into an ultrasonic apparatus, dispersing for 5-15 minutes with ultrasonic, adding 0.5%-2.5% nano graphite slice into the ultrasonic apparatus, continuing to disperse for 10-30min with ultrasonic, then adding ammonium persulphate solution which is acidized into the ultrasonic apparatus, continuously conducting ultrasonic polymerization for 5-7h under constant temperature, filtering polymerisate, scouring polymerisate with distilled water until non color to obtain nano graphite slice/polyaniline composite products, then placing products in sulfuric acid solution whose concentration is 15-20% to stir for 2-4h, filtering and scouring with deionized water, removing redundant sulfuric acid and drying, thereby obtaining the composite rod-like material. The invention adopts one-step ultrasonic polymerization method, and has simple reaction process, high production efficiency, low cost and small environment pollution, and the product has excellent heat stability and conductivity property.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to a nano-rod composite material mainly composed of polyaniline and a preparation method thereof. Background technique [0002] Conductive polymer materials have attracted much attention due to their potential and wide range of applications. Polyaniline has a wide range of applications due to a series of characteristics: low cost, easy synthesis, good thermal stability, reversible electrochemical activity, high room temperature conductivity, and low osmotic threshold mixed with polymers, such as Used in secondary batteries, electrochromic devices, antistatic, electromagnetic shielding, military camouflage, anti-corrosion coatings, etc. Therefore, polyaniline (PANI) has become one of the most concerned conductive polymers by scientists today. However, the insoluble and infusible characteristics of polyaniline lead to its poor processability, and it often loses its conductiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/02C08K7/00C08K3/04C08G73/02
Inventor 莫尊理史华锋陈红牛贵平赵仲丽
Owner NORTHWEST NORMAL UNIVERSITY
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