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Method for preparing conductive polymer composite with one-dimensional oriented porous structure

A conductive polymer and porous structure technology, applied in the direction of material resistance, etc., can solve the problems of easy cracking of the film, low stability, small action area, etc., and achieve the effect of low equipment requirements, high production efficiency, and low investment

Active Publication Date: 2011-03-30
CHINA COAL TECH ENG GRP CHONGQING RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for gas-sensing materials that monitor the gas flowing in pipelines, such a thin film has disadvantages such as easy to break, small active area, and low stability.

Method used

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  • Method for preparing conductive polymer composite with one-dimensional oriented porous structure
  • Method for preparing conductive polymer composite with one-dimensional oriented porous structure
  • Method for preparing conductive polymer composite with one-dimensional oriented porous structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] In this embodiment, the conductive particles used are CNTs (model S1212, produced by Chengdu Organic Chemistry Co., Ltd., Chinese Academy of Sciences, 50-80 nanometers in diameter, and aspect ratio greater than 500), and the soluble polymer matrix used is PVA (model is 0588, produced by Taiwan Changchun Company), the polymer solvent used is distilled water.

[0032] The test equipment includes:

[0033] Ultrasonic vibrator, model KS-600, Ningbo Maritime Department Kesheng Ultrasonic Equipment Co., Ltd.; freeze dryer, model FD-1C, Beijing Detianyou Technology Development Co., Ltd.; scanning electron microscope (SEM), model Hitachi S-4700 , Hitachi, Japan; Insulation resistance tester, ①Model TH2683, Changzhou Tonghui Electronics Co., Ltd., ②Model ZC-36, Shanghai Jingke Instrument Sixth Factory; Digital Multimeter, Model MY64, Dongguan Huayi Instrument Technology Limited company.

[0034] The preparation and testing method includes the following steps:

[0035] 1) Suspension pr...

Embodiment 2

[0042] In this embodiment, the conductive particles used are CB (model VXC-605, produced by Cabot Corporation, USA, with a DBP absorption value of 148±15cm 3 / 100g), the soluble polymer matrix used is PVA (model 0588, produced by Taiwan Changchun Company), and the polymer solvent used is distilled water.

[0043] The test equipment used is the same as in the first embodiment.

[0044] The preparation and testing method includes the following steps:

[0045] 1) Suspension preparation: Weigh 1g of CB, 100g of distilled water, 0.5g of surfactant, pour into a clean container, mechanically stir for 1h, then ultrasonically vibrate for 20min, continue stirring; weigh a certain amount of PVA, add to In the aqueous solution after ultrasonic vibration, stir and ultrasonic vibration until all PVA is dissolved and a uniform suspension is formed;

[0046] 2) Directional freezing: After pouring the suspension prepared in step 1) into a special container, slowly immerse the container in liquid nitro...

Embodiment 3

[0052] In this embodiment, the conductive particles used are CNTs (model S 1212, produced by Chengdu Organic Chemistry Co., Ltd., Chinese Academy of Sciences, diameter 50-80 nanometers, aspect ratio greater than 500), and the soluble polymer used is water-based polyurethane (WPU) , The solvent used is water.

[0053] The test equipment used is the same as in the first embodiment.

[0054] The preparation method includes the following steps:

[0055] 1) Suspension preparation: Weigh 1 g of CNTs, 100 g of water-based polyurethane emulsion, 0.5 g of surfactant, and pour it into a clean container, mechanically stir for 1 hour, then ultrasonically vibrate for 20 minutes, and continue stirring until a uniform suspension is formed;

[0056] 2) Directional freezing: After pouring the suspension prepared in step 1) into a special container, slowly immerse the container in liquid nitrogen at a speed of 2mm / s through a fixed-speed moving device, and place it in liquid nitrogen for 15 minutes aft...

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Abstract

The invention discloses a method for preparing a conductive polymer composite with a one-dimensional oriented porous structure. The preparation method mainly relates to physical phase change and does not relate to a chemical reaction, and compared with the conventional methods such as a micromachining method, a photoetching method, soft photoetching technology and the like, the preparation method has the characteristics of simplicity of process, high controllability, low requirements on equipment, high production efficiency and investment saving. The conductive polymer composite with the one-dimensional oriented porous structure prepared by the method has the application potential in aspects of flow gas sensors and the like.

Description

Technical field [0001] The invention relates to a method for preparing a conductive polymer composite material with a one-dimensional orientation porous structure. Background technique [0002] Conductive Polymer Composite (CPC) is a kind of conductive polymer material made by adding conductive filler (such as carbon black (CB), graphite, metal powder, etc.) to single or multiphase polymer . CPC materials can have high electrical conductivity at room temperature and the electrical conductivity can be adjusted within a large range. They are often used as antistatic and electromagnetic shielding materials, and are widely used in electronics, electrical appliances, textiles, coal mining and other industries. [0003] In recent years, the gas-sensitive and conductive properties of CPC materials have aroused widespread concern in academia and industry. Because these materials will cause significant changes in resistance when exposed to certain gases or organic solvents, they are used i...

Claims

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Application Information

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IPC IPC(8): C08J9/26C08L29/04C08K7/00C08K3/04G01N27/12
Inventor 许向彬李天明刘罡叶淑英刘小林
Owner CHINA COAL TECH ENG GRP CHONGQING RES INST
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