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Preparation method for magnetic carbon fibers with good interface property

A technology of interface performance and carbon fiber, which is applied in the direction of carbon fiber, fiber treatment, textiles and papermaking, etc., can solve the problem of not being able to improve the interface performance of carbon fiber at the same time, and achieve the effect of improving interface performance and interfacial bonding strength

Active Publication Date: 2014-06-25
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current modification of carbon fiber cannot improve the interfacial properties of carbon fiber and make it have good electromagnetic shielding performance at the same time

Method used

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  • Preparation method for magnetic carbon fibers with good interface property

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The first step is to prepare and mix concentrated nitric acid and concentrated sulfuric acid at a volume ratio of 3:1, place T800 carbon fiber in it, oxidize at 60°C for 4 hours, wash with distilled water until neutral drying.

[0020] In the second step, the carbon fiber prepared in the first step is placed in thionyl chloride for acyl chloride reaction at 76° C. for 48 hours, and then dried.

[0021] The third step is to prepare 50ml of N,N-dimethylformamide solution with a mass concentration of 5% of the fifth-generation polyamide-amide dendrimer, weigh 5g of the carbon fiber prepared in the second step, and place it in it at 100°C. Under the condition of reaction for 24h, washed with acetone repeatedly five times and dried.

[0022] The 4th step, preparation concentration is the cobalt dichloride (CoCl2) of 0.1mol / L respectively 2 .6H 2 O), ferrous chloride (FeCl 2 .4H 2 O) and sodium borohydride solution.

[0023] Step 5: Add 21 mL of the cobalt dichloride sol...

Embodiment 2

[0026] The difference between this example and Example 1 is that the volume ratio of the cobalt dichloride solution and the ferrous chloride solution is 1:1.

Embodiment 3

[0028] The difference between this example and Example 1 is that the volume ratio of the cobalt dichloride solution and the ferrous chloride solution is 1:2.

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Abstract

The invention discloses a preparation method for magnetic carbon fibers with a good interface property. The preparation method comprises the following steps: step 1, carrying out acid oxidation treatment on carbon fibers; step 2, carrying out acylating chlorination treatment on the carbon fibers; step 3, grafting a PAMAM (Polyamide Amide) dendrimer on the surfaces of the carbon fibers; step 4, preparing a nano iron-cobalt alloy on the surfaces of the carbon fibers. The PAMAM dendrimer is highly symmetrical; the surface of the PAMAM dendrimer contains a lot of amino functional groups and the interior of the PAMAM dendrimer contains a lot of nano cavities to be used as a template to obtain nano iron-cobalt alloy grains on the surfaces of the carbon fibers, so that the magnetism of the carbon fibers is functionalized and the carbon fibers can be used for preparing an electromagnetic shielding material; the interface bonding strength between the carbon fiber and base body resin can be greatly improved and the interface performance of a composite material is improved.

Description

technical field [0001] The invention belongs to the field of carbon fiber interface modification and functionalization, and relates to a method of preparing nano-iron-cobalt alloy particles on the surface of carbon fibers by using ethylenediamine as a core polyamide-amide dendrimer (PAMAM) as a template to improve the interface properties of carbon fibers and magnetic properties. Background technique [0002] Carbon fiber is an excellent material with high specific strength, high specific modulus, high temperature resistance, corrosion resistance, creep resistance, electrical conductivity, thermal conductivity and small thermal expansion coefficient. It is widely used in aerospace, automobiles, high-end sports equipment, etc. high-end field. However, due to the smooth surface of carbon fiber and the lack of functional groups on the surface, it is necessary to perform surface treatment on carbon fiber before applying carbon fiber, so as to improve the interface performance b...

Claims

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Application Information

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IPC IPC(8): D06M11/64D06M11/55D06M13/268D06M15/59D06M11/83D06M101/40
Inventor 刘丽眭凯强
Owner HARBIN INST OF TECH
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