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Method for improving conductive heat stability of polyaniline/inorganic nano conductive composite material

A conductive composite material, inorganic nanotechnology, applied in the direction of organic material conductors, non-metallic conductors, etc., can solve the problems of high production cost, poor electrical conductivity of polyaniline, large amount of long-chain organic protonic acid doping, etc., to improve dispersion performance, improve electrical conductivity and thermal stability, and reduce the effect of agglomeration

Active Publication Date: 2009-03-04
溧阳常大技术转移中心有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this patent application, the doping amount of long-chain organic protonic acid is too large, and a large amount of long-chain organic protonic acid will form a large steric hindrance between polyaniline chains, making polyaniline poor in conductivity. In addition, the existing Based on interfacial polymerization technology and polyaniline de-doping technology, the overall process is complicated and the production cost is high
[0003] In recent years, because conductive polymer nanocomposites have the functions of light, electricity, magnetism and the mutual conversion between light, electricity and magnetism, they have rapidly developed into an important research direction of nanocomposites. It is known that polyaniline and inorganic nanocomposites The compounding of materials can improve the processing performance of polyaniline, but the electrical and thermal stability of polyaniline / inorganic nano conductive composites is still poor, and there is no report on how to improve the electrical and thermal stability of the composite

Method used

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  • Method for improving conductive heat stability of polyaniline/inorganic nano conductive composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: the aqueous dispersion liquid that 8g attapulgite and 90g deionized water are made, the mixed acid solution that the HCl of 3g (0.0118mol) sulfosalicylic acid and 25mL4.0M (0.1mol) forms and 2.4g (0.0258mol) aniline was added into a three-necked flask, and stirred evenly; 5.88g (0.0258mol) of ammonium persulfate was dissolved in 30mL of deionized water and then added to the slurry to initiate polymerization; stirred at 20°C for oxidative polymerization for 4h; suction filtered to obtain Hydrochloric acid and sulfosalicylic acid co-doped polyaniline / attapulgite nanocomposite filter cake.

[0026]Hydrochloric acid and sulfosalicylic acid co-doped polyaniline / attapulgite nanocomposite filter cake and xylene were added to a three-necked flask and mixed, and the three-necked flask was placed in an electric heating mantle, vigorously stirred and continuously heated. When boiling, a large amount of mixed steam will be generated, and the mixed steam will be conden...

Embodiment 2

[0027] Embodiment 2: In embodiment 2, remove filter cake to be sulfosalicylic acid doped polyaniline / silicon oxide nano-conductive composite material filter cake, be the aqueous dispersion liquid that is made by 8g silicon oxide and 8g deionized water , 2.4g (0.0258mol) aniline, 5g (0.0197mol) sulfosalicylic acid and 5.88g (0.0258mol) ammonium persulfate were in-situ polymerized at 0°C for 6h, the organic solvent was toluene, and the heat treatment time was 6h. Other operations are all the same as in Example 1 to obtain the sulfosalicylic acid-doped polyaniline / silicon oxide nano-conductive composite material powder treated with toluene, and its volume resistivity is measured to be 65 Ω cm, and the powder is placed in After being treated at 140°C for 4 hours, the volume resistivity becomes 300Ω·cm.

Embodiment 3

[0028] Embodiment 3: in embodiment 3, except that filter cake is dodecylbenzenesulfonic acid doped polyaniline / titanium oxide nano conductive composite material filter cake, is the water that is made of 8g titanium oxide and 260g deionized water Dispersion liquid, 6.4g (0.0688mol) aniline, 9.60g (0.0294mol) dodecylbenzenesulfonic acid and 15.68g (0.0688mol) ammonium persulfate were in-situ polymerized at 25°C for 4 hours, and the organic solvent was xylene. Except that the heat treatment time is 5h, other operations are all the same as in Example 1, and the dodecylbenzenesulfonic acid-doped polyaniline / titanium oxide nano-conductive composite material powder obtained through the xylene treatment, and its volume resistivity is measured to be 5Ω ·cm, the powder was treated at 140°C for 4h, and the volume resistivity became 20Ω·cm.

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Abstract

The invention discloses a method for improving the conductive thermal stability of a polyaniline / inorganic nano-conductive composite material, which comprises the following steps: a proton acid doped polyaniline / inorganic nano-conductive composite material filter cake is firstly prepared, then the obtained filter cake is carried out the azeotropic distillation treatment, water in the filter cake is removed, and the proton acid doped polyaniline / inorganic nano-conductive composite material is simultaneously transferred into an organic phase. The method easily prepares the proton acid doped polyaniline / inorganic nano-conductive composite material organic dispersion liquid with the excellent dispersion through the azeotropic distillation dehydration and the phase transfer process, thereby reducing the clustering phenomenon of the composite material, improving the dispersion of the composite material in the organic phase and improving the conductive thermal stability of the nano-conductive composite material.

Description

technical field [0001] The invention relates to the field of nano conductive composite materials, in particular to a method for improving the conductive thermal stability of polyaniline / inorganic nano conductive composite materials. Background technique [0002] Polyaniline has unique properties and characteristics, such as diverse structures, good environmental stability, simple synthesis, cheap and easy-to-obtain raw materials, unique doping mechanism, excellent electrical conductivity, and reversible redox properties, etc., and is considered to be the most promising for practical applications. one of the conductive polymers. However, polyaniline has poor processability and poor conductivity and thermal stability, which limit its application. In particular, the poor thermal stability of electrical conductivity hinders the promotion of polyaniline in long-term applications and fields involving high-temperature processing and high-temperature applications, such as conductiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/00C08L79/02C08K3/00H01B1/12
Inventor 姚超曾永斌张国庆陈志刚吴凤芹丁永红李为民王茂华
Owner 溧阳常大技术转移中心有限公司
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