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Preparation method of low-resistance conductive plastic

A conductive plastic and low-resistance technology, applied in the field of conductive plastic materials, can solve the problems of high resistivity and poor conductivity of vanadium batteries, and achieve the effects of low production cost, high mechanical strength and reduced contact resistance

Active Publication Date: 2011-06-22
四川环通电子有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the Chinese patent literature (the patent application number is CN200510086201.9), a conductive plastic and its processing method and processing device are disclosed. The conductive plastic includes: 0.1-45v% conductive fiber, 55-99v% thermoplastic and 0 ~3v% processing aid; the conductive plastic described in this invention is conducted by overlapping short carbon fibers, and its conductivity is better than that of conductive plastics that only add graphite powder as a conductive agent. The disadvantage is that the overlapping carbon fibers have a thin layer Epoxy resin barrier, the resistivity is still relatively large, and the conductivity cannot meet the needs of vanadium batteries

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Put 120 grams of E51 bisphenol A liquid epoxy resin (Wuxi Resin Factory Phoenix E51), 60 grams of 651 type polyamide resin (Wuxi Resin Factory) and 12 grams of dibutyl phthalate in a hand oven and dry to 80 ° C , mix, stir well. Dip a 150mm×150mm×6mm carbon felt into the mixture of epoxy resin and curing agent that has been stirred well, and pay attention not to leave air bubbles in the carbon felt. Take out the impregnated carbon felt, put it in the PTFE mold groove of 100mm×100mm×6mm, add the mixture of epoxy resin and curing agent until the liquid level is flush with the groove, and cover with pp plastic film, Cover the plate and wait for it to cure into a composite board. Take the cured composite board out of the mold, put it into a tank filled with 80°C concentrated sulfuric acid, fix the board so that the upper and lower sides can fully contact the concentrated sulfuric acid, turn on the mixer, and stir the concentrated sulfuric acid on the upper layer. After 30...

Embodiment 2

[0018] Place 400 grams of 615A type epoxy resin (Wuxi Resin Factory) and 100 grams of 593 type curing agent (Wuxi Resin Factory) in an oven and bake to 50°C, mix and stir well. Put a 318mm×318mm×6mm carbon felt into a mold with a groove of 320mm×320mm×15mm, pour the mixture of epoxy resin and curing agent that has been stirred evenly on the carbon felt, and roll it out repeatedly with a glass rod to make the carbon felt The felt will saturate the mixture, being careful not to trap air bubbles. Take out the impregnated carbon felt, place it on a plane covered with PP plastic film, cover it with a layer of PP plastic film, cover the flat plate, and wait for curing to form a composite board. Put the cured composite board into a tank filled with concentrated sulfuric acid at 80°C, fix the board so that the upper and lower sides can fully contact the concentrated sulfuric acid, turn on the mixer, and stir the concentrated sulfuric acid on the upper layer. After 30 minutes, the com...

Embodiment 3

[0020] Place 2000 grams of 615A epoxy resin (from Wuxi Resin Factory) and 250 grams of 593 type curing agent (from Wuxi Resin Factory) in an oven and bake to 40°C, mix and stir well. Put 5 carbon felts of 318mm×318mm×6mm into a mold with grooves of 320mm×320mm×75mm, pour the mixture of epoxy resin and curing agent that has been stirred evenly on the carbon felts, cover the lid, and evacuate. Saturate the carbon felt completely with the mixture, making sure that no air bubbles remain in the carbon felt. Take out the impregnated carbon felt, place it on a plane covered with PP plastic film, cover it with a layer of PP plastic film, cover the flat plate, and wait for curing to form a composite board. Put the cured composite board into a tank filled with 80°C concentrated sulfuric acid, fix the composite board so that the upper and lower sides can fully contact the concentrated sulfuric acid, turn on the mixer, and stir the concentrated sulfuric acid on the upper layer. After 30 ...

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PUM

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Abstract

The invention relates to a low-resistance conductive plastic and a preparation method thereof. The low-resistance conductive plastic comprises the raw materials with the mass percentage: 30-85% of epoxide resin, 10-60% of curing agent, 0-3% of accelerant and 10-55% of carbon fiber felt. The preparation method of the low-resistance conductive plastic comprises the steps: the epoxide resin, the curing agent and the accelerant are put into a baking oven to be baked to be 30-150 DEG C, so that mixture A is obtained; the carbon fiber felt is dipped into the mixture A, and the mixed solution is putinto a mould to be cured to obtain a clad plate; the clad plate is placed into concentrated sulfuric acid with the temperature of 20-150 DEG C to be stirred and processed by ultrasonic oscillation; then, the clad plate is taken out and put into hot water with the temperature of 50-90 DEG C; finally, the low-resistance conductive plastic is obtained after being washed by ultrasonic wave for a plurality of times and dried. The low-resistance conductive plastic has good electric conduction performance, can not be etched by vanadium electrolyte, resists electric pile overcharge, and is high in mechanical strength and low in cost.

Description

technical field [0001] The invention belongs to the field of conductive plastic materials, and in particular relates to a preparation method of low-resistance conductive plastic. Background technique [0002] At present, graphite plates are usually used as pole plates in vanadium batteries, and thermoplastic conductive plastics are also used as pole plates. The advantage of graphite plate is low resistance, and the disadvantage is that it is easy to be etched and has poor toughness. Although the thermoplastic conductive plastic is not etched by the catholyte and has good toughness, its high resistance restricts the high-current discharge performance of the vanadium battery. Therefore, finding another conductive plate with good corrosion resistance, good toughness and good conductivity has become an important topic in the research of vanadium batteries. [0003] In the Chinese patent literature (the patent application number is CN200510086201.9), a conductive plastic and it...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/00C08K7/06C08K3/04C08J5/00
Inventor 刘联刘效疆陈茂斌冯秀丽李晓兵宋学兵
Owner 四川环通电子有限责任公司