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Polymer-matrix composite material and preparation method thereof

A technology of composite materials and polymers, applied in the field of polymer-based composite materials and their preparation, to achieve the effects of simple preparation process, improvement of thermal conductivity and dielectric constant, and optimization of thermal conductivity and dielectric properties

Active Publication Date: 2012-11-14
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] After literature search, no literature and patents similar to the present invention have been found. Some literature and patents related to the present invention retrieved mainly report that the dielectric properties of the material are improved by compounding the aluminum powder of the surface passivation layer as a filler. , there is no report on improving the thermal conductivity and dielectric properties of composite materials by changing the shape of metal fillers

Method used

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  • Polymer-matrix composite material and preparation method thereof
  • Polymer-matrix composite material and preparation method thereof
  • Polymer-matrix composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Provided in this example, PVDF is used as a matrix, and fillers are prepared from flake-shaped metal and metal passivation particles to prepare polymer-based composite materials. Metal fillers and PVDF in the composite materials are weighed according to the conversion of 50% of the volume fraction. Its preparation includes the following steps:

[0034] 1) Take metal aluminum powder particles, which are pure aluminum powder without other impurities as tested by XRD, and crush the metal aluminum powder particles into two kinds of powders with a particle size of about 10 μm and a nanometer size of about 50 nm;

[0035] 2) Take 10g of the crushed micron-sized metal powder, dry it at 120°C for 3 hours after introducing an appropriate amount of oxygen, pass through a 120-mesh sieve to disperse the dried agglomerated metal powder, and obtain passivated metal aluminum powder with uniform micron size powder;

[0036] 3) Same as step 2, to obtain passivation powder of metal alum...

Embodiment 2

[0045] In this example, PVDF is used as the matrix, the filler is prepared from fibrous aluminum metal and metal passivation particles, and the polymer-based composite material is prepared. The metal filler and PVDF in the composite material are weighed according to the conversion of 50% of the volume fraction. , its preparation includes the following steps:

[0046] 1) Take metal aluminum powder particles, which are pure aluminum powder without other impurities as tested by XRD, and crush the metal aluminum powder particles into two kinds of powders with a particle size of about 10 μm and a nanometer size of about 50 nm;

[0047] 2) Take 10g of the crushed micron-sized metal powder, dry it at 120°C for 4 hours after introducing an appropriate amount of oxygen, pass through a 120-mesh sieve to disperse the dried agglomerated metal powder, and obtain a passivated metal aluminum powder with uniform micron size powder;

[0048] 3) Same as step 2, to obtain passivation powder of ...

Embodiment 3

[0054] In this example, PI is used as the matrix, and fillers are prepared from flake metal and metal passivation particles to prepare polymer-based composite materials. The metal fillers and PI in the composite materials are weighed according to the conversion of 50% of the volume fraction. Its preparation includes the following steps:

[0055] 1) Take metal aluminum powder particles, which are pure aluminum powder without other impurities as tested by XRD, and crush the metal aluminum powder particles into two kinds of powders with a particle size of about 10 μm and a nanometer size of about 50 nm;

[0056] 2) Take 10g of the crushed micron-sized metal powder, dry it at 120°C for 5 hours after passing in an appropriate amount of oxygen, pass through a 120-mesh sieve to disperse the dried agglomerated metal powder, and obtain passivated metal aluminum powder with uniform micron size powder;

[0057] 3) Same as step 2, to obtain passivation powder of metal aluminum powder wit...

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Abstract

The invention provides a polymer-matrix composite material and a preparation method thereof, which belong to the technical field of preparation of electronic composite materials. The composite material is prepared from metal passivation fillers and polymer materials with different shapes, wherein the fillers are metal passivation particles and fibrous or platy metal with two grain sizes, which are matched with each other at a certain proportion, and according to the formula, the volume ratio of polymer is that the metal filler accounts for 1%-50% and the polymer accounts for 50%-99%. The composite material prepared from the metal passivation fillers with the different shapes and the polymer matrix has the advantages of high heat conductivity, low dielectric constant, low dielectric loss and the like. The preparation method has the characteristics of low heat treatment temperature, low cost and environment friendliness, and also has the characteristics of being simple to operate and suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of electronic composite material preparation, and in particular relates to a polymer-based composite material using metals of different shapes as fillers and a preparation method thereof. Background technique [0002] Thermally conductive materials are widely used in heat exchange engineering, heating engineering, electronic information engineering and other fields. For a long time, metal materials have been generally chosen as thermal conductive materials. Due to the poor corrosion resistance of metal materials, its application range is limited. In order to improve the corrosion resistance of metals, alloy technology, anti-corrosion coating technology, etc. have been adopted, but their thermal conductivity has been greatly reduced. In recent years, some fields that have high requirements on the thermal conductivity of materials, such as heat transfer engineering, electromagnetic shielding, electronic info...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/16C08L23/12C08L23/06C08L33/12C08L63/00C08L79/08C08K9/06C08K9/02C08K7/06C08K7/00C08K3/08B29C43/58
Inventor 汪宏周永存向锋喻科王鲁
Owner XI AN JIAOTONG UNIV
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