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Preparation method of carbon fiber/carbon nanotube/organic silicone resin multidimensional hybrid composite material

A carbon nanotube and composite material technology, applied in the field of nanomaterials, can solve the problems of poor mechanical properties and low bonding strength, and achieve the effects of improving mechanical properties, improving interface structure, and facilitating industrial production.

Active Publication Date: 2014-11-19
HARBIN INST OF TECH
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  • Application Information

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Problems solved by technology

[0004] In order to solve the technical problems of low interfacial bonding strength and poor mechanical properties of carbon fiber-reinforced silicone resin-based composite materials, the present invention provides a method for preparing a carbon fiber / carbon nanotube / organic silicon resin multidimensional hybrid composite material

Method used

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  • Preparation method of carbon fiber/carbon nanotube/organic silicone resin multidimensional hybrid composite material

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Embodiment 1

[0017] 1. Preparation of carboxylated carbon nanotubes: put 1g of multi-walled carbon nanotubes in a 250mL single-necked flask, carefully add 120mL of a mixed solution of concentrated sulfuric acid and concentrated nitric acid (v:v=3:1), and magnetically stir at 40°C Oxidize for 10 hours, add 500 mL of distilled water to the reacted solution to dilute, filter with a porous membrane, wash the filtrate with a large amount of distilled water until the solution is neutral, and dry in vacuum at 60°C to obtain carboxylated carbon nanotubes;

[0018] 2. Preparation of aminated carbon nanotubes: immerse 0.5g of carbon nanotubes into 100mL of toluene solution, sonicate for 30min at room temperature, and then add 3.1g of 3-aminopropyltriethoxysilane (APTES), the operation process is under nitrogen Keep the temperature down, heat up to 30°C for 3 hours, heat to reflux at 100°C for 3 hours, then cool, wash with an appropriate amount of toluene, filter, and vacuum dry at 60°C to obtain amin...

Embodiment 2

[0029] 1. Preparation of carboxylated carbon nanotubes: 4g multi-walled carbon nanotubes were placed in a 1000mL single-necked flask, carefully added 480mL of a mixed solution of concentrated sulfuric acid and concentrated nitric acid (v:v=3:1), and oxidized with magnetic stirring at 40°C After 10 hours, add 2000 mL of distilled water to the reacted solution to dilute, filter with a porous membrane, wash the filtrate with a large amount of distilled water until the solution is neutral, and vacuum dry at 60°C to obtain carboxylated carbon nanotubes;

[0030] 2. Preparation of aminated carbon nanotubes: Immerse 1g of carbon nanotubes into 200mL of toluene solution, ultrasonicate for 30min at room temperature, then add 6.2g of 3-aminopropyltriethoxysilane (APTES), and the operation process is kept under nitrogen atmosphere. The temperature was raised to 30°C for 3 hours, heated to reflux at 100°C for 3 hours, then cooled, washed with an appropriate amount of toluene, filtered, and...

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Abstract

The invention relates to a preparation method of a carbon fiber / carbon nanotube / organic silicone resin multidimensional hybrid composite material and belongs to the technical field of nanomaterials. The method comprises the following steps: 1) preparing carboxylated carbon nanotubes; 2) preparing aminated carbon nanotubes; 3) preparing functional carbon fiber; 4) preparing the carbon fiber / carbon nanotube / organic silicone resin multidimensional hybrid composite material. According to the method, the carbon nanotubes are endowed with the activity of participating in reaction, the dispersibility of the carbon nanotubes in silicone resin is improved, the organic silicone resin is strengthened by utilizing the excellent toughness and the strength of the carbon nanotubes, a nano-scale interface increases the mechanical meshing effect between the fiber and a resin matrix, the interface structure is improved and the mechanical properties of the carbon fiber / carbon nanotube / organic silicone resin multidimensional hybrid composite material are improved. The interlayer shear strength of the carbon fiber / carbon nanotube / organic silicone resin multidimensional hybrid composite material prepared by the invention can achieve 31.06Mpa, which is improved by 28.4% in comparison with that before treatment.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and relates to a method for preparing a carbon fiber / carbon nanotube / organic silicon resin (CF / CNTs / SR) multidimensional hybrid composite material. Background technique [0002] With the development of aerospace technology, various aircraft newly developed in the field of aerospace put forward higher and higher requirements on the performance of polymer matrix composite materials, especially high temperature resistance. Although traditional carbon fiber reinforced epoxy resin-based composites have high strength and modulus and outstanding mechanical properties, epoxy resin has poor high temperature resistance and is easy to decompose at high temperatures. After curing, it cannot meet high temperature resistance, high strength and durability. Comprehensive requirements for new-generation spacecraft such as high humidity and heat. Silicone resin is a polyorganosiloxane with highly cros...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04C08K9/06C08K7/24C08K3/04C08K7/06
Inventor 刘丽武光顺黄玉东马丽春张庆波谢非王芳姜波
Owner HARBIN INST OF TECH
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