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Preparation method of nano-micron 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 less environmental pollution, high product production efficiency and rich variety

Active Publication Date: 2016-02-24
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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  • Preparation method of nano-micron multi-scale fiber prepreg

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Embodiment 1

[0033] This embodiment relates to a method for preparing a nano-micron multi-scale fiber prepreg, the method comprising the following steps:

[0034] Step 1: Purify 2g of multi-walled carbon nanotubes (MWCNT) with a mixture of 80ml of concentrated sulfuric acid (98%) and concentrated nitric acid (65%) (volume ratio 3:1). After purification and functionalization, 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 the ultrasonic wave is 100W, the treatment time is 2h, heat at 80°C, and add 40 parts Amine curing agent, continuously stirred until uniform under vacuum assistance, forming an epoxy resin system modified by carbon nanotube materials;

[0036] Step 3: Use a film coating device to prepare a resin system modified by carbon nanomaterials with a width of 1000mm and an area density of 100g / m 2 ,...

Embodiment 2

[0040] This embodiment relates to a method for preparing a nano-micron multi-scale fiber prepreg, the method comprising the following steps:

[0041] Step 1: Purify 1g of Graphene with a mixture of 80ml of concentrated sulfuric acid (98%) and concentrated nitric acid (65%) (volume ratio 3:1). Oxygen functional groups;

[0042]Step 2: Mix 5 parts of graphene with 100 parts of diamine-modified BMI resin with ultrasonic-assisted mechanical stirring. The power of the ultrasonic wave is 100W, the treatment time is 2h, heat at 80°C, and add 40 parts of acid anhydride to cure agent, continuously stirred until uniform under vacuum assistance to form a graphene-modified resin system;

[0043] Step 3: Use a film coating device to prepare a graphene-modified resin system with a width of 600mm and an area density of 10g / m 2 , a graphene-modified resin film with a viscosity of 0.1Pa·s;

[0044] Step 4: At a temperature of 80°C, pass the graphene-modified resin film and carbon fiber thro...

Embodiment 3

[0047] This embodiment relates to a method for preparing a nano-micron multi-scale fiber prepreg, the method comprising the following steps:

[0048] Step 1: Add 2g of carbon nanofibers to 80ml of a mixture of concentrated sulfuric acid (98%) and concentrated nitric acid (65%) (volume ratio 3:1), ultrasonically disperse for 2 hours, stir at 120°C for 60 minutes, and use Wash with ionic water until neutral, dry to obtain surface carboxylated carbon nanofibers:, then add 50% ethylenediamine in N,N`-dimethylformamide (DMF) solution, heat and stir at 80°C for 6h, Afterwards, it was washed with deionized water and dried to obtain aminated carbon nanofibers.

[0049] Implementation effect: the nano-micron multi-scale fiber prepreg prepared in this example see figure 1 Middle (b) SEM image of carbon nanofibers, which not only improves the performance of the resin itself, but also enhances the interface properties between the fiber and the resin, and realizes the reinforcement of 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 method for preparing a composite material, in particular to a method for preparing a nano-micron multi-scale fiber prepreg. Background technique [0002] In the past half a century, carbon fiber composites, especially carbon fiber reinforced polymer matrix composites, have become popular in aerospace, automobile manufacturing, Leading material in sporting goods and other applications. However, due to the disadvantages of delamination between layers 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 due to their unique nanostructure properties. More and more scientists and engineers have begun to combine nano-scale carbon nanomaterials with traditiona...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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