Electric conduction composite material with poly-2, 3-dimethylaniline/polyaniline core shell structure and preparation method of electric conduction composite material

A conductive composite material, dimethylaniline technology, applied in the field of composite materials, can solve problems such as low conductivity, easy to be oxidized, and limit sensor research, and achieve the effect of improving conductivity

Active Publication Date: 2011-10-19
CHONGQING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Poly 2,3-dimethylaniline is one of the more important ring-substituted derivatives of conductive polyaniline. At present, research on poly 2,3-dimethylaniline is mainly focused on sensors, but due to the presence of methyl groups , is easily oxidized during the preparation process, so it is difficult to prepare poly-2,3-dimethylaniline with conductivity, such as: Anjali et al prepared poly-2,3-dimethylaniline by solution polymerization, And studied its application in the fatty alcohol sensor, but the resistance of the prepared poly 2,3-dimethylaniline is only 10 6 Ω(Polyaniline and its substituted derivatives as sensor for aliphatic alcohols[J].Sensors and Actuators B, 2000, 67: 173-177); Milind et al also prepared poly-2,3-dimethylaniline in solution system , found that it has a sensing effect on the relative humidity of the air (Poly(2,3-dimethylaniline) as a competent material for humidity sensor[J]. Journal of Applied Polymer Science, 2001, 81:1382-1387), but prepared The poly-2,3-dimethylaniline resistances are all within 10 7 The range of Ω has entered the category of insulators
Due to the low conductivity of poly-2,3-dimethylaniline prepared by the existing technology, it greatly limits its further research on other sensors, conductive components and electrode active materials.

Method used

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  • Electric conduction composite material with poly-2, 3-dimethylaniline/polyaniline core shell structure and preparation method of electric conduction composite material
  • Electric conduction composite material with poly-2, 3-dimethylaniline/polyaniline core shell structure and preparation method of electric conduction composite material

Examples

Experimental program
Comparison scheme
Effect test

experiment example 1

[0024] Add 25ml distilled water 8.2×10 to reactor A successively -3 mol concentrated hydrochloric acid (commercially available content 36~38%) and 8.15×10 -3 mol 2,3-dimethylaniline, stirred for 30 minutes to make it evenly mixed; dripped 12.5ml of 1.2mol / L ammonium persulfate solution, stirred and reacted at 30°C for 12 hours; filtered with suction, washed the filter cake with distilled water until the filtrate was colorless; The filter cake was dried at 60° C. for 12 hours, taken out and ground into powder to obtain powdered poly-2,3-dimethylaniline. Move the powder into reactor B, add 150ml 1.2mol / L hydrochloric acid solution, stir to disperse evenly; add 3.29×10 -2 mol aniline (3ml), stir for 30min; slowly drop 22.7ml 0.58mol / L ammonium persulfate solution into the system, stir and react at 30°C for 5h; filter with suction, wash the filter cake with 0.1mol / L hydrochloric acid solution until the filtrate is colorless . The filter cake was dried at 60°C for 12 hours, take...

experiment example 2

[0026] Add 25ml distilled water 8.2×10 to reactor A successively -3 mol concentrated hydrochloric acid (commercially available content 36~38%) and 8.15×10 -3 mol 2,3-dimethylaniline, stirred for 30 minutes to make it evenly mixed; dropwise added 12.5ml 1.2mol / L sodium persulfate solution, stirred and reacted at 30°C for 12 hours; filtered with suction, washed the filter cake with distilled water until the filtrate was colorless; The filter cake was dried at 60° C. for 12 hours, taken out and ground into powder to obtain powdered poly-2,3-dimethylaniline. Move the powder into reactor B, add 37.5ml of 1.2mol / L hydrochloric acid solution, stir to disperse evenly; add 8.15×10 -3 mol aniline (0.75ml), stirred for 30min; slowly dripped 14.1ml 0.58mol / L sodium persulfate solution into the system, stirred and reacted at 0°C for 8h; suction filtered, washed the filter cake with 0.1mol / L hydrochloric acid solution until the filtrate was free color. The filter cake was dried at 60°C f...

experiment example 3

[0028] Add 25ml distilled water 8.2×10 to reactor A successively -3 mol concentrated hydrochloric acid (commercially available content 36~38%) and 8.15×10 -3 mol 2,3-dimethylaniline, stirred for 30 minutes to make it evenly mixed; 12.5ml of 1.2mol / L sodium persulfate solution was added dropwise, stirred and reacted at 30°C for 12 hours, filtered with suction, and the filter cake was washed with distilled water until the filtrate was colorless; The filter cake was dried at 60° C. for 12 hours, taken out and ground into powder to obtain powdered poly-2,3-dimethylaniline. Move the powder into reactor B, add 150ml of 1.2mol / L hydrochloric acid solution, stir to disperse evenly; then add 1.97×10 -2 mol sodium dodecylbenzenesulfonate and 3.29×10 -2 mol aniline (3ml), emulsify for 30min; slowly drop 22.7ml 0.58mol / L sodium persulfate solution into the system, stir and react at 30°C for 8h; after the reaction, add 30ml saturated NaCl solution to reactor B to break the emulsion 30mi...

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Abstract

The invention relates to an electric conduction composite material with a poly-2, 3-dimethylaniline/polyaniline core shell structure, and a preparation method of the electric conduction composite material. In the composite material, the poly-2, 3-dimethylaniline is used as a core, and the polyaniline is used as a shell. The preparation method comprises the following steps: the poly-2,3-dimethylaniline is firstly prepared by a solution polymerization process, and then is filtered, washed, dried and ground to obtain the powdered poly-2,3-dimethylaniline; and the powered poly-2, 3-dimethylaniline is used as the core, polymerization is carried out to the surface of the powered poly-2, 3-dimethylaniline by the solution polymerization process or emulsion polymerization process, and then a product is filtered, washed, dried and ground to obtain the electric conduction composite material with the poly-2, 3-dimethylaniline/polyaniline core shell structure. In the electric conduction composite material with the poly-2, 3-dimethylaniline/polyaniline core shell structure, the electric conductivity of the poly-2, 3-dimethylaniline/polyaniline is remarkably improved, thereby being beneficial tobeing applied to the field of sensors, electric conductive devices, electrode active materials and the like.

Description

technical field [0001] The invention belongs to the field of composite materials, in particular to a core-shell structured poly-2,3-dimethylaniline / polyaniline conductive composite material and a preparation method thereof. Background technique [0002] Conductive polyaniline has a wide range of applications in smart windows, electrochromic devices, stealth materials, electrode materials, anti-corrosion coatings, etc. Application prospects. [0003] Poly 2,3-dimethylaniline is one of the more important ring-substituted derivatives of conductive polyaniline. At present, research on poly 2,3-dimethylaniline is mainly focused on sensors, but due to the presence of methyl groups , is easily oxidized during the preparation process, so it is difficult to prepare poly-2,3-dimethylaniline with conductivity, such as: Anjali et al prepared poly-2,3-dimethylaniline by solution polymerization, And studied its application in fatty alcohol sensor, but the resistance of prepared poly 2...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/02C08G73/02
Inventor 马利甘孟瑜严俊杨雅文任纪纲单洪亮
Owner CHONGQING UNIV
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