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Preparation method of carbon nanosphere-carbon fiber multi-scale reinforcement

A carbon nanosphere and carbon fiber technology, which is applied in the nano field to achieve the effects of environmental friendliness, improved interlaminar shear strength and simple process

Inactive Publication Date: 2016-06-01
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

After domestic and foreign literature search, there is still no report on the preparation of carbon nanosphere-carbon fiber multi-scale reinforcement by mild hydrothermal synthesis method

Method used

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  • Preparation method of carbon nanosphere-carbon fiber multi-scale reinforcement
  • Preparation method of carbon nanosphere-carbon fiber multi-scale reinforcement
  • Preparation method of carbon nanosphere-carbon fiber multi-scale reinforcement

Examples

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Embodiment 1

[0028] A preparation method of carbon nanosphere-carbon fiber multi-scale reinforcement includes the following steps:

[0029] (1) First, remove the sizing agent on the surface of the carbon fiber in acetone, under the condition of soaking at room temperature for 5 hours;

[0030] (2) After soaking, the carbon fiber is dried at 120°C for 60 minutes, and then cut into chopped carbon fiber with a length of 3 to 4 mm, and then 60 mg of chopped carbon fiber is put into the PTFE in the hydrothermal reactor In the lining, then add 450 mL of a methylcellulose aqueous solution with a mass concentration of 0.8 wt.% to the polytetrafluoroethylene lining, and stir for 10 hours;

[0031] (3) After the stirring is completed, start the two-step hydrothermal reaction: The first step: add 1.5g of sugar to the above-mentioned mixed solution of chopped carbon fiber and methyl cellulose aqueous solution which is evenly stirred, stir for 10 minutes and then seal, then put the reactor into the constant ...

Embodiment 2

[0035] A preparation method of carbon nanosphere-carbon fiber multi-scale reinforcement, including the following steps:

[0036] (1) First, remove the sizing agent on the surface of the carbon fiber in acetone, under the condition of soaking at room temperature for 8 hours;

[0037] (2) After soaking, dry the carbon fibers at 110°C for 40 minutes, then cut them into chopped carbon fibers with a length of 3 to 4 mm, and then put 100 mg of chopped carbon fibers into the PTFE in the hydrothermal reactor In the lining, then add 450 mL of a methylcellulose aqueous solution with a mass concentration of 1.0 wt.% to the polytetrafluoroethylene lining and stir for 20 hours;

[0038] (3) After the stirring is completed, start the two-step hydrothermal reaction: The first step: add 1.1 to 2.0 g of sugar to the above-mentioned mixed solution of uniformly stirred chopped carbon fiber and methyl cellulose aqueous solution, stir for 25 minutes and then seal, and then put the reaction kettle into t...

Embodiment 3

[0042] A preparation method of carbon nanosphere-carbon fiber multi-scale reinforcement, including the following steps:

[0043] (1) First, remove the sizing agent on the surface of the carbon fiber in acetone, under the condition of soaking for 7 hours at room temperature;

[0044] (2) After soaking, the carbon fiber is dried at 150℃ for 35min, and then cut into chopped carbon fiber with a length of 3~4mm, and then 90mg of chopped carbon fiber is put into the PTFE in the hydrothermal reactor In the lining, then add 450 mL of a methylcellulose aqueous solution with a mass concentration of 0.5 wt.% to the polytetrafluoroethylene lining, and stir for 15 hours;

[0045] (3) After the stirring is completed, start the two-step hydrothermal reaction: Step 1: Add 1.1 g of sugar to the above-mentioned mixed solution of chopped carbon fiber and methyl cellulose aqueous solution that is evenly stirred, stir for 20 minutes and then seal, then put the reactor into the constant temperature zone ...

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Abstract

The invention discloses a preparation method of a carbon nanosphere-carbon fiber multi-scale reinforcement used for a composite material and having excellent interface adhesion performance. The preparation method comprises the following steps: firstly, uniformly dispersing short chopped carbon fibers into methylcellulose aqueous solution; and with a carbohydrate solution serving as a precursor, performing two steps of hydrothermal reactions, and then growing a layer of carbon nanospheres with controllable particle sizes of 10 to 500nm on site on the surfaces of carbon fibers, thereby obtaining the carbon nanosphere-carbon fiber multi-scale reinforcement. By virtue of the hydrothermal synthesis process with low cost, environmental friendliness, low energy consumption and rapidness, the carbon nanosphere-carbon fiber multi-scale reinforcement is obtained on the premise that no carbon fiber is lost. The carbon nanosphere-carbon fiber multi-scale reinforcement has the advantages of high surface activity, multiple chemical functional groups, good adhesion to a matrix, and the like; the composite material prepared by the multi-scale reinforcement has the advantage that the interlaminar shear strength is enhanced by 35%-45%.

Description

Technical field [0001] The invention relates to the field of nanotechnology, in particular to a method for preparing a carbon nanosphere-carbon fiber multi-scale reinforcement. Background technique [0002] Carbon fiber has excellent properties such as light weight, high strength, high modulus, fatigue resistance and low thermal expansion coefficient, making it one of the most important composite reinforcements at present, and has been used in aerospace, aviation and sports equipment and other fields. However, due to the shortcomings of carbon fiber surface inertness, low surface energy, few chemical functional groups and poor adhesion to the matrix, when carbon fiber is applied to composite materials, there are many defects in the interface. Therefore, the interlayer strength of the carbon fiber composite material is low, which limits its wide application in aerospace and other fields. [0003] At present, multi-scale carbon reinforcements have been increasingly used in advanced ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M11/74D06M101/40
Inventor 王慧奇韩涛靳秀芝杨学腾杨芳雷永胜
Owner ZHONGBEI UNIV