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Method for preparing nanometer-micrometer multi-scale fiber prepreg

A multi-scale, prepreg technology, applied in the field of nano-micron multi-scale fiber prepreg preparation, achieves the effects of high production efficiency, rich varieties and broad application prospects

Active Publication Date: 2014-03-26
SHANGHAI COMPOSITES SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the prepreg market is mainly composed of conventional carbon fiber reinforced epoxy resin, cyanate and other prepregs, while the nano-micron multi-scale fiber prepregs prepared by hot-melt prepregs are rarely available at home and abroad. to report

Method used

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  • Method for preparing nanometer-micrometer multi-scale fiber prepreg

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Experimental program
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Effect test

Embodiment 1

[0033] This embodiment relates to a preparation method of nano-micron multi-scale fiber prepreg, and the method includes the following steps:

[0034] Step 1: Purify 2g of multi-walled carbon nanotubes (MWCNT) with a mixture of 80ml concentrated sulfuric acid (98%) and concentrated nitric acid (65%) (volume ratio 3:1), purify and functionalize the surface Rich in oxygen-containing functional groups;

[0035] Step 2: Mix 1 part of multi-walled carbon nanotubes (MWCNT) and 100 parts of diglycidyl ether epoxy resin with ultrasonic-assisted mechanical stirring, the power of ultrasonic wave is 100W, the treatment time is 2h, heated at 80°C, and 40 parts of The amine curing agent is continuously stirred to uniformity under the assistance of vacuum to form an epoxy resin system modified by carbon nanotube material;

[0036] Step 3: The resin system modified by carbon nanomaterials is prepared by a coating device with a width of 1000mm and an areal density of 100g / m 2 , a carbon nan...

Embodiment 2

[0040] This embodiment relates to a preparation method of nano-micron multi-scale fiber prepreg, and the method includes the following steps:

[0041] Step 1: Purify 1 g of graphene (Graphene) with a mixture of 80 ml concentrated sulfuric acid (98%) and concentrated nitric acid (65%) (volume ratio 3:1), purify and functionalize it, and make its surface rich in oxygen functional group;

[0042]Step 2: 5 parts of graphene (Graphene) and 100 parts of diamine modified BMI resin are mixed with ultrasonic-assisted mechanical stirring, the ultrasonic power is 100W, the treatment time is 2h, heated at 80°C, and 40 parts of acid anhydrides are added to cure agent, and continue to stir until uniform under vacuum assistance to form a graphene-modified resin system;

[0043] Step 3: The graphene-modified resin system is prepared with a film coating device with a width of 600 mm and an areal density of 10 g / m 2 , a graphene-modified resin film with a viscosity of 0.1 Pa s;

[0044] Step...

Embodiment 3

[0047] This embodiment relates to a preparation method of nano-micron multi-scale fiber prepreg, and the method includes the following steps:

[0048] Step 1: Add 2g of carbon nanofibers to a mixture of 80ml of concentrated sulfuric acid (98%) and concentrated nitric acid (65%) (volume ratio 3:1), after ultrasonic dispersion for 2h, stir at 120°C for 60min, use up Washed with ionized water until neutral, dried to obtain surface carboxylated carbon nanofibers:, then added to N,N`-dimethylformamide (DMF) solution containing 50% ethylenediamine, heated and stirred at 80 °C for 6 h, After washing with deionized water and drying, the aminated carbon nanofibers were obtained.

[0049] Implementation effect: see the nano-micron multi-scale fiber prepreg prepared in this example. figure 1 Middle (b) SEM image of carbon nanofibers, which not only improves the properties of the resin itself, but also enhances the interfacial properties between the fibers and the resin, and realizes the...

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Abstract

The invention provides a method for preparing a nanometer-micrometer multi-scale fiber prepreg. The method comprises the following steps: step one, a carbon nanomaterial is purified and functionalized so as to remove impurities in the carbon nanomaterial and introduce functional groups; step two, the carbon nanomaterial and resin are subjected to mechanical dispersive mixing, a curing agent is added, and sufficient stirring is performed, so that a carbon nanomaterial modified resin system is formed; step three, a film coating device is adopted to prepare a carbon nanomaterial modified resin glue film by the carbon nanomaterial modified resin system; and step four, the carbon nanomaterial modified resin glue film and continuous fibers are used for preparing the nanometer-micrometer multi-scale fiber by a prepreg machine with a hot-melt method at the temperature ranging from 80 DEG C to 150 DEG C. According to the method for preparing the nanometer-micrometer multi-scale fiber prepreg, the hot-melt method is adopted for preparing the prepreg, so that the environment pollution is small, the production efficiency is high, the blank of the multi-scale fiber prepreg at home and abroad is filled up, and varieties of resin matrixes for prepreg preparation technology with the hot-melt method are enriched.

Description

technical field [0001] The invention relates to a preparation method of a composite material, in particular to a preparation method of a nano-micron multi-scale fiber prepreg. Background technique [0002] In the past half century, carbon fiber composites, especially carbon fiber reinforced polymer matrix composites, have become widely used in aerospace, automobile manufacturing, Leading material in sporting goods and other applications. However, due to the disadvantages of interlayer delamination and poor out-of-plane mechanical properties along the thickness direction, the in-depth application of composite materials is limited. [0003] Carbon nanomaterials, including carbon nanotubes, carbon nanofibers, graphene, etc., exhibit extremely excellent mechanical properties, electrical conductivity and thermal conductivity on the macro scale due to their unique nanostructure characteristics. More and more scientists and engineers have begun to combine nano-scale carbon nanoma...

Claims

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Application Information

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IPC IPC(8): C08L63/00C08L33/20C08J5/06C08J5/24C08L79/08C08J5/04C08K9/02C08K9/04C08K3/04B29C70/16
Inventor 郭金海郝旭峰李涛诸静居建国
Owner SHANGHAI COMPOSITES SCI & TECH CO LTD
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