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Preparation method of boron nitride nanotube hydrophobic membrane

A technology of boron nitride nanotubes and hydrophobic membranes, applied in chemical instruments and methods, nitrogen compounds, nanotechnology, etc., can solve the problems of many impurities, inability to form films, low concentration, etc., and achieve simple process, high yield, low cost effect

Inactive Publication Date: 2013-01-30
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current preparation methods all obtain dispersed boron nitride nanotubes with low concentration and many impurities, which cannot form a film.

Method used

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  • Preparation method of boron nitride nanotube hydrophobic membrane
  • Preparation method of boron nitride nanotube hydrophobic membrane
  • Preparation method of boron nitride nanotube hydrophobic membrane

Examples

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specific Embodiment approach 1

[0016] Specific embodiment one: In this embodiment, the method for preparing a boron nitride nanotube hydrophobic membrane based on a stainless steel substrate includes the following steps:

[0017] (1) Seal the raw material amorphous boron powder and several stainless steel balls into a stainless steel ball mill tank, place them in a horizontal ball mill for ball milling, the mass ratio of ball milling balls to raw materials is 80:1, and the ball milling is carried out under an argon atmosphere. The pressure of the ball mill jar was filled to 240kpa, and ball milling was continued at room temperature for 150 hours at 110 rpm.

[0018] (2) After ball milling, place the sealed jar in a glove box filled with nitrogen to take out the boron powder. After ball milling, boron powder is dissolved in ethanol organic solvent together with catalyst ferric nitrate under nitrogen atmosphere, the mass ratio of catalyst to boron powder is 0.07:1, the molar concentration of raw materials dis...

specific Embodiment approach 2

[0026] Embodiment 2: This embodiment differs from Embodiment 1 in that the ball mill described in step (1) is a vertical ball mill. Others are the same as in the first embodiment.

[0027] The nanotubes prepared in this embodiment have a length of about 30 μm and a diameter ranging from 150 to 250 nm. The contact angle measurement results reached the superhydrophobic standard, and the water droplet contact angle reached 161°.

specific Embodiment approach 3

[0028] Embodiment 3: The difference between this embodiment and Embodiments 1 and 2 is that the ball milling in step (1) is carried out under an ammonia atmosphere. Others are the same as the first and second embodiments.

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Abstract

The invention relates to a preparation method of a boron nitride nanotube hydrophobic membrane, belonging to the technical field of waterproof nano materials. The preparation method provided by the invention comprises the following steps of: 1) sealing raw materials amorphous boron powder and a plurality of stainless steel balls in a stainless steel ball grinding tank, and placing the stainless steel ball grinding tank in a ball mill for ball milling; 2) after ball milling, placing the sealed stainless steel ball grinding tank in a glove box filled with nitrogen to take out boron powder, dissolving the boron powder and catalyst in organic solvent in the atmosphere of nitrogen after ball milling, and conducting ultrasonic oscillation to prepare boron coating; 3) evenly coating the prepared boron coating on a low-carbon stainless steel substrate and placing the substrate in a sintering furnace for sintering; and 4) after the sintering is completed, continuously feeding N2 / H2 gas into the sintering furnace, keeping gas flow unchanged, and naturally decreasing temperature to room temperature to obtain the boron nitride nanotube hydrophobic membrane based on stainless steel. The nano membrane prepared by adopting the preparation method provided by the invention has the characteristics of high purity and high density, the measured contact angle is 158.1 plus or minus 3.6 degrees and the super-hydrophobic standard is satisfied.

Description

technical field [0001] The invention belongs to the technical field of waterproof nanometer materials, and relates to a method for preparing a boron nitride nanotube superhydrophobic membrane material. Background technique [0002] The structure of boron nitride nanotubes is similar to that of carbon nanotubes, and its excellent mechanical properties, thermal stability at high temperatures, and resistance to oxidation have great potential in the field of nanoelectronics. Boron nitride nanotubes have a micron length, and the combination of nano-micro systems makes the nano-membrane obtain a bionic lotus leaf effect super-hydrophobic film, which can be used in nano-hydrophobic, nano-electronic device development and other fields. However, the current preparation methods all obtain dispersed boron nitride nanotubes, which have low concentration and many impurities, making it impossible to form a film. Contents of the invention [0003] Aiming at the problems existing in the ...

Claims

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Application Information

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IPC IPC(8): C23C24/08C01B21/064B82Y30/00
Inventor 刘晓为李玲
Owner HARBIN INST OF TECH
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