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Surface-functionalized BN nanosheet, and preparation method and application thereof

A technology of surface functionalization and nano-flakes, which is applied in the direction of dyeing polymer organic compound treatment, epoxy resin glue, adhesive type, etc., can solve problems such as complex process flow, achieve enhanced interfacial interaction, and improve mechanical properties and thermal conductivity, promoting peeling and dispersion effects

Inactive Publication Date: 2020-07-03
SHENYANG AEROSPACE UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Among the existing preparation methods of BN nanosheets, there are methods of adding intercalation agent for intercalation and exfoliation, and ultrasonic treatment is used to form BN nanosheets, which are then functionally modified by chemical reagents (such as silane coupling agents). Thereby improving its degree of dispersion in the polymer, mechanical properties and thermal conductivity, but these preparation methods, the process is relatively complicated

Method used

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  • Surface-functionalized BN nanosheet, and preparation method and application thereof
  • Surface-functionalized BN nanosheet, and preparation method and application thereof
  • Surface-functionalized BN nanosheet, and preparation method and application thereof

Examples

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preparation example Construction

[0040] (1) A method for preparing surface functionalized BN nanosheets, the process flow chart is shown in figure 1 , including the following steps:

[0041] This example uses TritonX-100 to modify BN nanosheets:

[0042] 1) Mix 0.1-0.5g of BN nanosheets and 1-5mL of tritonX-100 in an agate grinding bowl, and manually grind for 30-40min to obtain a mixture.

[0043]2) Add the mixture of polyethylene glycol octylphenyl ether (tritonX-100) and BN nanosheets into acetone after mixing and grinding, and react for 2-3 hours under reflux under condensation and stirring at 50-60°C to obtain the heated solution, and then ultrasonically treat the heated solution below 20° C. for 60-80 min to obtain a suspension of surface-functionalized BN nano-flakes, which contains surface-functionalized BN nano-flakes (m-BN).

[0044] 3) Remove the organic solvent of the surface-functionalized BN nano-flake suspension, and carry out thermogravimetric and simultaneous thermal analysis (TGA) of the p...

Embodiment 1

[0056] A preparation method of modified BN / epoxy resin nano composite adhesive, comprising the following steps:

[0057] (1) Mix 0.2 g of BN nanosheets and 2 mL of tritonX-100 in an agate grinding bowl, and manually grind for 30 min to obtain a mixture.

[0058] (2) The mixture of tritonX-100 and BN nanosheets was mixed and ground into 20 mL of acetone, and condensed and refluxed, and reacted for 2 hours under stirring at 50° C. to obtain a heated solution. Then, the heated solution was ultrasonically treated below 20° C. for 60 min to obtain a uniformly dispersed surface-functionalized BN nanosheet (m-BN) suspension, wherein the ultrasonic frequency was 35 KHz.

[0059] (3) Stir by magnetic force for 20 minutes, and then ultrasonically treat for 30 minutes, mix 3.5 g of epoxy resin (E-51) and m-BN suspension evenly to obtain a BN / resin mixture.

[0060] The BN / resin mixture was then evaporated with acetone at 70°C using a hot plate and magnetic stirring. Air bubbles and res...

Embodiment 2

[0066] A preparation method of modified BN / epoxy resin nano composite adhesive, comprising the following steps:

[0067] (1) Mix 0.2 g of BN nanosheets and 2 mL of tritonX-100 in an agate grinding bowl, and manually grind for 30 min to obtain a mixture.

[0068] (2) The mixture of tritonX-100 and BN nanosheets was mixed and ground into 30 mL of acetone, and condensed and refluxed, reacted for 2 hours under stirring at 50° C. to obtain a heated solution. Then, the heated solution was ultrasonically treated below 20° C. for 60 min to obtain a uniformly dispersed surface-functionalized BN nanosheet (m-BN) suspension, wherein the ultrasonic frequency was 40 KHz.

[0069] (3) Stirring by magnetic force for 20 minutes, and then ultrasonic treatment for 30 minutes, 4.9 g of epoxy resin (E-51) and m-BN suspension were uniformly mixed to obtain a BN / resin mixture.

[0070] The BN / resin mixture was then evaporated with acetone at 70°C using a hot plate and magnetic stirring. Air bubbl...

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Abstract

The invention discloses a surface-functionalized BN nanosheet, and a preparation method and application thereof, belonging to the field of preparation and modification of BN nanosheets. The preparation method of the surface-functionalized BN nanosheet comprises the following steps of: uniformly mixing and grinding tritonX-100 and BN nanosheets, adding the mixed and ground mixture into an organic solvent, carrying out heating and stirring in a reflux condensation state, carrying out ultrasonic dispersing and stripping to obtain a surface-functionalized BN nanosheet suspension, and removing a solution to obtain the surface-functionalized BN nanosheet. TritonX-100 molecules on the surfaces of the BN nanosheets in the surface functionalized BN nanosheets are subjected to surface functionalization, so the BN nanosheets can be more uniformly dispersed in a polymer matrix; meanwhile, the surface functionalized BN nanosheets are physically entangled with polymer matrix molecules, so the intermediate interface interaction between the surface functionalized BN nanosheets and the polymer matrix is enhanced, and the interface modification remarkably improves the mechanical property and the thermal conductivity of a modified polymer system.

Description

technical field [0001] The present invention relates to the technical field of preparation and modification of BN nanosheets, in particular to a surface functionalized BN nanosheet and its preparation method and application. epoxy adhesive. Background technique [0002] Due to its light weight, easy processing and low cost, polymer materials are now mostly used to support and protect electronic products. With the development of modern electronic products to faster speed and frequency, smaller size and more functions, heat dissipation has become a a key question. Unfortunately, most polymer materials do not have ideal thermal conductivity, for example, epoxy and silicone gel exhibit poor thermal conductivity, so they cannot meet the needs of modern electronic products for fast heat transfer. [0003] Thermally conductive adhesives are one of the polymer materials. The way to improve their thermal conductivity is to add fillers with high thermal conductivity to the resin, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/00C09C3/10C09J163/00C09J11/04
CPCC08K2003/385C08K2201/011C09C1/00C09C3/10C09J11/04C09J163/00C08K9/04C08K7/00C08K3/38
Inventor 孟庆实郭国吉王朔姬书得李晓东王英波韩森森马军
Owner SHENYANG AEROSPACE UNIVERSITY
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