Functionalized boron nitride nanosheet and preparation method and application thereof

A functionalized, nanosheet technology, applied in the field of nanomaterials, can solve the problems of low preparation efficiency, high cost, poor dispersibility, etc., and achieve the effects of simple operation, low production cost, and improved dispersibility.

Active Publication Date: 2017-09-15
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
View PDF10 Cites 37 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The synthesis methods of boron nitride nanosheets include chemical vapor deposition, solid phase transformation ...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Functionalized boron nitride nanosheet and preparation method and application thereof
  • Functionalized boron nitride nanosheet and preparation method and application thereof
  • Functionalized boron nitride nanosheet and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035]Mix 10g of sucrose crystals with 1g of boron nitride powder evenly, put them together with 110g of stainless steel balls with a diameter of 6mm into a 250ml stainless steel ball mill jar, seal and mill on a QM-3SP2 planetary ball mill at a speed of 200rpm for 24 hours. After opening the ball mill jar, you can smell the smell of ammonia gas, which indicates that boron nitride and sucrose have undergone a mechanochemical reaction. The mechanism may be that the boron atom combines with the oxygen of the sucrose hydroxyl group, and the nitrogen atom combines with the hydrogen of the hydroxyl group to form ammonia through a multi-step reaction. gas. The ball-milled product was ultrasonically washed with 100 ml of deionized water, and filtered with a microporous membrane. Wherein the obtained filtrate has a pH value of alkaline, which is caused by dissolved ammonia or amine. The resulting filter cake was washed and filtered twice, each time with 100 ml of deionized water. Th...

Embodiment 2

[0038] Mix 10g of sucrose crystals with 1g of boron nitride powder evenly, put them together with 110g of stainless steel balls with a diameter of 6mm into a 250ml stainless steel ball mill jar, seal and mill on a QM-3SP2 planetary ball mill at a speed of 500rpm for 16 hours. Ultrasonic wash with 100ml deionized water and centrifuge at 8000rpm for 10 minutes. The obtained precipitate was repeatedly washed-centrifuged twice, each time with 100 ml of deionized water. Then the precipitate was vacuum-dried at 60°C for 12 hours, and the functionalized boron nitride nanosheet powder was obtained after grinding. Take 0.2 g of powder and ultrasonically disperse in 20 ml of deionized water for 1.5 hours in a water bath, and absorb the supernatant after standing for 12 hours to obtain an aqueous dispersion of functionalized boron nitride nanosheets. attached image 3 The AFM image of the obtained functionalized boron nitride nanosheets shows that the thickness of the functionalized bo...

Embodiment 3

[0040] Mix 10g of sucrose crystals and 1g of boron nitride powder evenly, add them together with 100g of 10mm in diameter stainless steel balls and 30g of 1mm in diameter stainless steel balls into a 250ml stainless steel ball mill jar, seal it and run it on a QM-3SP2 planetary ball mill at 500rpm Speed ​​ball milling for 24 hours.

[0041] Ultrasonic wash with 100ml deionized water, filter with microporous membrane. The obtained filter cake was repeatedly washed-filtered 3 times, each time with 100 ml of deionized water. Then take 5g of wet filter cake (about 10wt% solid content) in 50ml deionized water water bath ultrasonic dispersion for 2 hours, centrifuge at 2000rpm speed for 10 minutes, absorb the supernatant to obtain the aqueous dispersion of functionalized boron nitride nanosheets. Take an appropriate amount of the dispersion liquid, filter it, and vacuum-dry it at 60 degrees for 12 hours, and obtain functionalized boron nitride nanosheet powder after grinding. Calc...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Plane sizeaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to view more

Abstract

The invention discloses a functionalized boron nitride nanosheet and a preparation method and application thereof. The preparation method of the functionalized boron nitride nanosheet mainly comprises the following steps: (1) uniformly mixing boron nitride powder with a hydroxyl-containing organic solid; (2) continuously or discontinuously applying a mechanical acting force to the mixture; (3) removing residual organic solid in the mixture by means of water or an organic solvent to obtain wet functionalized boron nitride, and further drying and grinding the wet functionalized boron nitride to obtain dry functionalized boron nitride; (4) dispersing the wet or dry functionalized boron nitride in a solvent, leaving the mixture to stand or centrifugalizing the mixture, and taking supernate; and (5) filtering or centrifugalizing the supernate at a high speed and collecting the solid matter to dry to obtain the functionalized boron nitride nanosheet. The preparation method disclosed by the invention has the advantages of being simple to operate, high in yield, low in cost and the like, and the obtained functionalized boron nitride nanosheet is good in dispersibility in water, organic solvents and resin matrixes, and convenient for scaled production and application.

Description

technical field [0001] The invention relates to a functionalized hexagonal boron nitride nanosheet and its dispersion, a preparation method and an application, and belongs to the technical field of nanomaterials. Background technique [0002] Hexagonal boron nitride nanosheets usually refer to flake-shaped materials with a thickness of less than 100 nanometers, which have excellent thermal conductivity, insulation, barrier properties, high temperature resistance and chemical stability, and a high specific surface area. Electricity, microelectronics, energy storage, water treatment, catalysis, biomedicine and other fields have very broad application prospects. The current preparation methods of boron nitride nanosheets usually include two approaches: exfoliation and synthesis. The stripping method is based on hexagonal boron nitride microchips, mainly including micromechanical stripping, ball milling stripping, ultrasonic stripping, high-pressure flow stripping, chemical str...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C08K9/04C08K9/00C08K7/00C08K3/38C08L63/00C08K7/24C01B21/064B82Y40/00C09K5/10
Inventor 成会明陈少华刘碧录刘佳曼邹小龙
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap