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Micro-nano lamellar boron nitride/rubber composite material and preparation method thereof

A boron nitride and nanosheet technology, which is applied in the field of micro-nanosheet boron nitride/rubber composite materials and its preparation, can solve the problem of large filling fraction of fillers, application limitations, and poor electrical insulation properties of composite materials. problem, to achieve the effect of good processing performance, reduced contact thermal resistance, and high thermal conductivity

Active Publication Date: 2013-09-25
BEIJING UNIV OF CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, rubber materials are mostly poor conductors of heat, which limits their application in products that require good thermal conductivity
[0003] At present, the fillers used to improve the thermal conductivity of rubber materials are mostly metals, metal oxides, and non-metals such as graphite and carbon black. Large, so that other properties of the composite material decline, the product performance is not ideal

Method used

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  • Micro-nano lamellar boron nitride/rubber composite material and preparation method thereof
  • Micro-nano lamellar boron nitride/rubber composite material and preparation method thereof
  • Micro-nano lamellar boron nitride/rubber composite material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0022] Example 1: 100 parts of silicon rubber, 1 part of micro-sheet boron nitride, and 9 parts of nano-sheet boron nitride, to prepare a micro-nano-sheet boron nitride / silicone rubber composite material.

[0023] First prepare nano-sheet boron nitride: Weigh 1g of raw material boron nitride (thickness is about 1.5μm, lateral dimension is about 20μm, aspect ratio is about 13) in 1000ml propanol solution, and ultrasonic instrument is used for ultrasonication, ultrasonic power 200W, ultrasonic time of 12h, to obtain a nanosheet boron nitride / propanol suspension with a thickness below 10nm and an aspect ratio between 50-300.

[0024] Preparation of composite material: Weigh 10g of silicone rubber and add it to 400ml of propanol solution, heat in a water bath at 75°C and stir to dissolve. Weigh 0.1g of micro-sheet boron nitride and propanol solution containing 0.9g of nano-sheet boron nitride and add them to the propanol solution in which the silicone rubber is dissolved and mix e...

Embodiment 2

[0025] Example 2: 100 parts of silicon rubber, 90 parts of micro-sheet boron nitride, and 10 parts of nano-sheet boron nitride, to prepare a micro-nano-sheet boron nitride / silicone rubber composite material.

[0026] First prepare nano-sheet boron nitride: Weigh 10g of raw material boron nitride (thickness is about 1.5μm, lateral dimension is about 20μm, width-thickness ratio is about 13) in 2500ml propanol solution, and ultrasonic instrument is used for ultrasonication, ultrasonic power 1000W, ultrasonic time is 3h, to obtain a nanosheet boron nitride / propanol suspension with a thickness below 10nm and an aspect ratio between 50-300.

[0027] Preparation of composite material: Weigh 10g of silicone rubber and add it to 400ml of propanol solution, heat in a water bath at 75°C and stir to dissolve. Weigh 9g of micro-sheet boron nitride and propanol solution containing 1g of nano-sheet boron nitride and add them to the propanol solution in which the silicone rubber is dissolved ...

Embodiment 3

[0028] Example 3: 100 parts of silicon rubber, 20 parts of micro-sheet boron nitride, and 80 parts of nano-sheet boron nitride, to prepare a micro-nano-sheet boron nitride / silicone rubber composite material.

[0029] First prepare nanosheet boron nitride: Weigh 10g of raw boron nitride (thickness is about 1.5μm, lateral dimension is about 20μm, aspect ratio is about 13) in 2000ml of acetone solution, and ultrasonic probe is used for ultrasound with ultrasonic power of 1500W , the ultrasonic time is 2h, and the nanosheet boron nitride / acetone suspension with a thickness below 10nm and an aspect ratio of 50-300 is obtained.

[0030] Preparation of composite material: Weigh 10g of silicone rubber and add it into 400ml of acetone solution, heat in a water bath at 35°C and stir to dissolve. Weigh 2g of micro-sheet boron nitride and the acetone solution containing 8g of nano-sheet boron nitride and add them to the acetone solution in which the silicone rubber has been dissolved and ...

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Abstract

The invention provides a micro-nano lamellar boron nitride / rubber composite material and a preparation method thereof. The preparation method comprises the following steps of: 1, placing a micrometer lamellar boron nitride raw material into a solvent, and ultrasonically stripping to prepare nanometer lamellar boron nitride; 2, mixing obtained nanometer lamellar boron nitride and the micrometer lamellar boron nitride raw material with rubber in proportion, adding a vulcanizing agent, and uniformly mixing to prepare a rubber compound; 3, vulcanizing the boron nitride / rubber rubber compound to obtain a high heat-conducting silicon rubber product. The micrometer lamellar boron nitride is difficult to aggregate and mainly plays a bridge overlapping role in the rubber, and the prepared boron nitride in a nanometer lamellar structure theoretically achieves the heat conductivity far more than that of common boron nitride. The boron nitride heat-conducting rubber prepared through the method provided by the invention has higher heat-conducting property under less filling parts and can be widely applied to positions which need heat dissipation and heat transfer in the fields of spaceflight, avigation, electron and electric appliances.

Description

technical field [0001] The invention proposes a preparation method and application of hexagonal nanosheet boron nitride. The composite material prepared by mixing it with micron boron nitride and filling the rubber matrix has high thermal conductivity, and can be widely used in aerospace, aviation, Parts that require heat dissipation and heat transfer in the fields of electronics and electrical appliances. Background technique [0002] After the 20th century, rubber materials, as the fourth largest strategic resource, have entered a stage of great development. Compared with traditional metals, ceramics and other materials, rubber materials have light weight, high viscoelasticity, chemical corrosion resistance, easy processing and molding, and fatigue resistance. Excellent performance and other characteristics. However, rubber materials are mostly poor conductors of heat, which limits their application in products that require good thermal conductivity. [0003] At present,...

Claims

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Application Information

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IPC IPC(8): C08L83/04C08L7/02C08L9/04C08L9/08C08L27/12C08L9/02C08K3/38
Inventor 刘力匡枝俏张继阳冯予星廖坤官效岩温世鹏卢咏来贺磊
Owner BEIJING UNIV OF CHEM TECH