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Method for preparing functional glass fiber reinforced polyimide composite material

A glass fiber and polyimide technology, applied in the nano field, can solve the problems of peeling, product strength reduction, shrinkage, etc., and achieve the effect of improving the interface bonding strength and simple reaction steps.

Inactive Publication Date: 2012-12-05
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When glass fiber is heated at a lower temperature, although its performance does not change much, it will cause shrinkage. Therefore, in the manufacture of glass fiber reinforced materials, if the fiber and resin are not well bonded, it will shrink due to repeated heating and cooling. Peeling occurs, resulting in a decrease in product strength

Method used

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  • Method for preparing functional glass fiber reinforced polyimide composite material

Examples

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Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: Single-walled carbon nanotubes (OD<8nm) prepared by chemical vapor deposition and glass fibers are used as initial raw materials. After purification, acidification and acylation of single-walled carbon nanotubes, acylated carbon nanotubes are obtained. Then react the acylated carbon nanotubes with the γ-aminopropyltrimethoxysilane coupling agent solution to obtain the carbon nanotubes grafted with a coupling agent on the surface, and then combine the carbon nanotubes grafted with the coupling agent on the surface with The glass fiber is reacted to obtain a functionalized glass fiber reinforced body; the functionalized glass fiber reinforced body is compounded with a polyimide resin to obtain a glass fiber reinforced polyimide composite material.

[0024] Step (1): In a 250mL single-necked round bottom flask equipped with a stirrer, add 5g of dried multi-walled carbon nanotube raw material and 100mL, 20% nitric acid solution, treat it under 40kHz ultrasonic wav...

Embodiment 2

[0031] Example 2: Multi-walled carbon nanotubes (OD<8nm) prepared by arc discharge method and glass fibers are used as initial raw materials. After purification, acidification and acylation of multi-walled carbon nanotubes, acylated carbon nanotubes are obtained, and then reacting the acylated carbon nanotubes with a γ-aminopropyltriethoxysilane coupling agent solution to obtain a carbon nanotube surface grafted with a coupling agent, and then combining the carbon nanotubes grafted with a coupling agent on the surface with The glass fiber is reacted to obtain a functionalized glass fiber reinforced body; the functionalized glass fiber reinforced body is compounded with a polyimide resin to obtain a glass fiber reinforced polyimide composite material.

[0032] Step (1): In a 250mL single-necked round bottom flask equipped with a stirrer, add 1.1g of dried multi-walled carbon nanotube raw material and 100mL, 20% nitric acid solution, treat it under 1kHz ultrasonic wave for 24 hou...

Embodiment 3

[0040] Example 3: Single-walled carbon nanotubes (OD<1nm) prepared by laser evaporation method and glass fibers are used as initial raw materials. After purification, acidification and acylation of single-walled carbon nanotubes, acylated carbon nanotubes are obtained, and then The acylated carbon nanotubes are reacted with N-β (aminoethyl)-γ-aminopropyltrimethoxysilane coupling agent solution to obtain carbon nanotubes surface grafted with coupling agent, and then the surface grafted with The carbon nanotube of the coupling agent reacts with the glass fiber to obtain a functionalized glass fiber reinforced body; the functionalized glass fiber reinforced body is compounded with a polyimide resin to obtain a glass fiber reinforced polyimide composite material.

[0041] Step (1): In a 250mL single-neck round bottom flask equipped with a stirrer, add 2.1g of dried multi-walled carbon nanotube raw material and 100mL, 20% nitric acid solution, treat it under 50kHz ultrasonic waves f...

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Abstract

The invention belongs to the field of nano technology and particularly relates to a method for preparing a functional glass fiber reinforced polyimide composite material. The method comprises: purifying carbon nanotubes, performing carboxylation and acylation, and reacting the acylated carbon nanotubes with a coupling agent with active amino to obtain carbon natubes grafted with the coupling agent on surface; reacting the carbon natubes grafted with the coupling agent on surface with glass fiber to obtain functional glass fiber reinforced body; and compounding the functional glass fiber reinforced body with polyimide resin to obtain the glass fiber reinforced polyimide composite material. In the invention, the reaction steps are simple, the reinforced body prepared by modifying the glass fiber with the strength and toughness of the nanotubes can strengthen and toughen the bonding performance of a resin substrate and obviously improve the interface bonding strength of the composite material and the mechanical performance of the composite material. The composite material prepared by the method can be widely used in aerospace, automobile, ship, transportation, mechano-electronic and civil technical fields and other technical fields.

Description

technical field [0001] The invention belongs to the field of nanotechnology, and in particular relates to a preparation method of a functionalized glass fiber reinforced polyimide composite material. Background technique [0002] Glass fiber reinforced composite material is an inorganic non-metallic material with excellent performance. Compared with traditional materials, it has better design and formability, good mechanical properties, stable chemical properties, fire resistance and heat insulation properties, Wide range of raw materials, good insulation, high temperature resistance, so it has a longer service life and is much lighter than traditional materials. Glass fiber has excellent physical properties, which are mainly manifested in four aspects: (1) Mechanical properties: high strength and high modulus are one of the most important characteristics of glass fiber. (2) Electrical properties: Glass fiber has high specific resistance and low dielectric constant. The ele...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L79/08C08K9/02C08K7/14C08K9/06C08K9/04C08K7/00C08K3/04
Inventor 邱军王宗明
Owner TONGJI UNIV