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mc nylon nano conductive composite material and preparation method thereof

A technology of nano-conductivity and composite materials, which is applied in the field of preparation of conductive plastics, can solve the problems of limited conductivity of composite materials, achieve good comprehensive performance and use performance, eliminate agglomeration phenomenon, and simple preparation process

Inactive Publication Date: 2011-11-30
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN 10565542A discloses a conductive MC nylon material and its preparation method. Since the conductive material is simply mixed in the matrix, the improvement of the electrical conductivity of the composite material is very limited, and the MC nylon nano-conductive composite is prepared by surface modification of the conductive filler. Material reported not yet available

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Mix 85% absolute ethanol and 5% distilled water, add 10% modifier silane coupling agent γ-propyltrimethoxysilane and mix evenly, then add expanded graphite magnetically stir for 30min, ultrasonic treatment 3 times, each 30min, After an interval of 5 minutes, the temperature was raised to 60°C for modification, and after suction filtration, washing, and vacuum drying, modified expanded graphite was obtained for future use. After the caprolactam monomer (accounting for 85% of the total mass) was heated and melted, the pre-vacuum-dried modified expanded graphite (accounting for 15% of the total mass) was added, magnetically stirred, and ultrasonically dispersed for 40 minutes, and then the mixture was vacuum dehydrated. Keep the temperature at about 130°C and the vacuum at 10 -1 Pa, after a period of time, add an appropriate amount of catalyst sodium hydroxide, continue heating and vacuuming, and add an appropriate amount of co-catalyst isocyanate after boiling for 60 minu...

Embodiment 2

[0022] Mix 95% absolute ethanol and 2% distilled water, add 3% modifier silane coupling agent γ-aminopropyltriethoxysilane and mix well, then add carbon fiber magnetic stirring for 40min, ultrasonic treatment 4 times, 40min each time , at an interval of 8 minutes, the temperature was raised to 70°C for modification, and the modified carbon fiber was obtained by suction filtration, washing, and vacuum drying for future use. After the caprolactam monomer (accounting for 90% of the total mass) is heated and melted, a certain amount of pre-vacuum-dried modified carbon fiber (accounting for 10% of the total mass) is added, magnetically stirred, and ultrasonically dispersed for 40 minutes, and then the mixture is vacuumed and dehydrated. Keep the temperature at about 140°C and the vacuum at 10 -1 Pa, after a period of time, add an appropriate amount of catalyst potassium hydroxide, continue heating and vacuuming, and add an appropriate amount of co-catalyst isocyanate after boiling ...

Embodiment 3

[0024]Mix 90% absolute ethanol and 5% distilled water, add 5% modifying agent titanate coupling agent and mix evenly, then add conductive carbon black and magnetically stir for 40min, ultrasonic treatment 4 times, each time 40min, interval 10min, heat up to Modified at 70°C, filtered, washed, and vacuum-dried to obtain modified carbon black for future use. After heating and melting the caprolactam monomer (accounting for 95% of the total mass), add a certain amount of pre-vacuum-dried modified carbon black (accounting for 5% of the total mass), magnetic stirring, ultrasonic dispersion for 30 minutes, and then continue to vacuumize the mixture For dehydration, keep the temperature at about 120°C and the vacuum degree at 10 -1 Pa, after a period of time, add an appropriate amount of catalyst metal sodium, continue heating and vacuuming, and add an appropriate amount of co-catalyst acetyl caprolactam after boiling for 50 minutes. Quickly cast the active material into a static mo...

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Abstract

The invention discloses a methyl cellulose (MC) nylon nano conductive composite material and a preparation method thereof. The material comprises the following chemical components by weight percent: 85%-100% of MC nylon and 0%-15% of conductive filling material, wherein the conductive filling material is one or two or more than two of natural crystalline flake graphite, expanded graphite, conductive carbon black, carbon fiber and carbon nano tube; and the conductive filling material is treated with a modifier, the use amount of the modifier is 0-10% of the use amount of the conductive fillingmaterial, and the modifier is one or two or more than two of gamma-trimethoxypropylsilane coupling agent, gamma-aminopropyltrimethoxysilane coupling agent, gamma-aminopropyltriethoxysilane coupling agent, gamma-aminopropylmethyldimethoxysilane coupling agent, metatitanic acid coupling agent, phosphate coupling agent, aluminate coupling agent and organic acid chromium compound. The MC nylon nano conductive composite material has the advantages of good comprehensive performance and use property.

Description

technical field [0001] The invention relates to a preparation technology of conductive plastic, in particular to MC nylon nano conductive composite material and a preparation method thereof. Background technique [0002] MC nylon, also known as monomer cast nylon, is to inject the molten caprolactam monomer under normal pressure, together with alkali catalyst, activator and other additives, directly into a mold at a certain temperature for polymerization and molding. The process is simple and convenient. , High production efficiency, has become the main production method of nylon products. Pure MC nylon products are light in weight, good in performance, high in wear resistance and long in service life, and are widely used in mining machinery, pipeline transportation, metallurgy, chemical industry, textiles, packaging and other industries. However, its surface resistivity is large, and it often causes great loss and damage due to static electricity in industrial production a...

Claims

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Application Information

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IPC IPC(8): C08L77/02C08K9/10C08K9/06C08K3/04C08K7/24C08K7/06C08K7/00C08G69/16
Inventor 张士华崔崇陈光韩萍程佳平朱志萍
Owner NANJING UNIV OF SCI & TECH
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