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A kind of conductive carbon fiber/waterborne epoxy resin composite foam material and preparation method thereof

A technology of water-based epoxy resin and conductive carbon fiber, which is applied in the field of conductive carbon fiber/water-based epoxy resin composite foam material and its preparation, conductive polymer composite foam material and its preparation, can solve the problem of large cells of epoxy resin foam material, Influencing factors are complex and difficult to control, etc., to achieve the effect of uniform pore size, simple preparation method, and excellent electrical conductivity

Active Publication Date: 2020-05-19
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are also the defects that the influencing factors in the preparation process are complicated and difficult to control, and the prepared epoxy resin foam material has relatively large cells.

Method used

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  • A kind of conductive carbon fiber/waterborne epoxy resin composite foam material and preparation method thereof
  • A kind of conductive carbon fiber/waterborne epoxy resin composite foam material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh 50 grams of carbon fiber tow (T300, 12K), fold it back and forth into a large tow with a length of 30 cm, tie it tightly with one end of the carbon fiber tow and place it in a tube furnace for heat treatment. First, the temperature was raised to 275° C. for 1 hour and kept for 1 hour. Then, pass high-purity nitrogen gas into the tube furnace, raise the temperature to 800°C for 5 hours and keep it warm for 1 hour, then cool down to room temperature naturally, and finally cut the carbon fiber tow into 3mm chopped carbon fiber fibers.

[0028] Take by weighing 5 grams of the above-mentioned obtained chopped carbon fiber and add it to 10 grams of water-based epoxy resin with a water content of 50%. After mixing evenly under high-speed stirring, add 2 grams of epoxy resin curing agent tetraethylenepentamine, and stir evenly to obtain Mixed ingredients.

[0029] After freezing the mixed material with liquid nitrogen, put it into a freeze-drying oven at -15° C. for 168 ...

Embodiment 2

[0034] Weigh 50 grams of carbon fiber tow (T300, 12K), fold it back and forth into a large tow with a length of 30 cm, tie it tightly with one end of the carbon fiber tow and place it in a tube furnace for heat treatment. First, the temperature was raised to 275°C within 1 hour and kept for 1 hour. Then pass high-purity nitrogen into the tube furnace, raise the temperature to 800°C within 5 hours and keep it warm for 1 hour, then cool down to room temperature naturally, and finally cut the carbon fiber tow into 6mm chopped carbon fibers.

[0035] Weigh 5 grams of the above-mentioned chopped carbon fiber and add it to 10 grams of water-based epoxy resin with a water content of 50%. After mixing evenly under high-speed stirring, add 2 grams of epoxy resin curing agent tetraethylenepentamine, and stir evenly.

[0036] After freezing the mixed material with liquid nitrogen, put it into a freeze-drying oven at -15° C. for 160 hours to freeze-dry to obtain the mixed material powder....

Embodiment 3

[0039] Weigh 50 grams of carbon fiber tow (T300, 12K), fold it back and forth into a large tow with a length of 30 cm, tie it tightly with one end of the carbon fiber tow and place it in a tube furnace for heat treatment. First, the temperature was raised to 275°C within 1 hour and kept for 1 hour. Then pass high-purity nitrogen into the tube furnace, raise the temperature to 800°C within 5 hours and keep it warm for 1 hour, then cool down to room temperature naturally, and finally cut the carbon fiber tow into 5mm chopped carbon fibers.

[0040] Weigh 5 grams of the above-mentioned chopped carbon fiber and add it to 9 grams of water-based epoxy resin with a water content of 55%. After mixing evenly under high-speed stirring, add 2 grams of epoxy resin curing agent tetraethylenepentamine, and stir evenly.

[0041] After freezing the mixed material with liquid nitrogen, put it into a freeze-drying oven at -15° C. for 168 hours to freeze-dry to obtain the mixed material powder.

...

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Abstract

The invention relates to a conductive carbon fiber / water-borne epoxy resin composite foam material and a preparation method of the composite foam material, and belongs to the technical field of high polymer materials. The conductive carbon fiber / water-borne epoxy resin composite foam material is prepared from carbon fibers, water-borne epoxy resin and a curing agent in a mass ratio of (0.5-2.5):(4-5):1. The preparation method is simple; the carbon fiber, water-borne epoxy resin and curing agent are mixed uniformly in the mass ratio to obtain a mixture, and then the obtained mixture is placed at a temperature in a range from -10 to -20 DEG C for freeze drying for 160-175 hours; water in the water-borne epoxy resin is used as a foaming agent; the effect of regulating and controlling the foaming rate, the electrical resistivity or electric conductivity of the foam material is reached by regulating and controlling the time for freeze drying and controlling the amount of the foaming agent in the preparation process according to the mass ratio of the water-borne epoxy resin to the short carbon fibers; and then curing is performed to obtain the conductive carbon fiber / water-borne epoxy resin composite foam material with uniform pore sizes and excellent electrical conductivity.

Description

technical field [0001] The invention relates to a conductive polymer composite foam material and a preparation method thereof, in particular to a conductive carbon fiber / water-based epoxy resin composite foam material and a preparation method thereof, belonging to the technical field of polymer materials. Background technique [0002] The conductive polymer composite foam material is formed by composite foaming of conductive fillers such as carbon nanotubes, graphene, expanded graphite, metal ion chemicals (such as lithium chloride) and polymer materials. It has good physical properties, and has the advantages of light weight, high specific strength, ability to absorb and buffer impact loads, excellent and adjustable electrical conductivity, good chemical stability, and low cost. It has been widely used in the fields of electronic devices, sensors, aerospace and automobiles. Not only can save material and energy, reduce cost, but also make operation more flexible and conven...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/00C08K9/00C08K7/06C08J9/12
CPCC08J9/125C08J2203/10C08J2363/00C08K7/06C08K9/00C08K2201/001C08K2201/004C08L63/00
Inventor 董余兵傅雅琴朱曜峰
Owner ZHEJIANG SCI-TECH UNIV
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