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Preparation of ultra-dispersed nano diamond hydrosol

A nano-diamond and dispersion technology, applied in the direction of medical preparations of non-active ingredients, nanotechnology, nanotechnology, etc., can solve the problem that it is difficult to obtain primary particle hydrosol, and achieve high yield, simple processing, and simple technical process Effect

Active Publication Date: 2015-01-07
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existing nano-diamond deagglomeration methods mainly use chemical and mechanical interactions to generate shear force through mechanical methods, and at the same time add stabilizers and dispersants to obtain a stable and dispersed nano-diamond aqueous solution. The nano-diamond aqueous sol obtained by this method The particle size is generally distributed around 100nm, and it is difficult to obtain a hydrosol of primary particles with a size of several nanometers. In addition, the addition of stabilizers or dispersants to the solution also limits the application of nanodiamonds in some emerging fields, such as precision machining, composite materials, and biomedicine. field

Method used

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  • Preparation of ultra-dispersed nano diamond hydrosol
  • Preparation of ultra-dispersed nano diamond hydrosol
  • Preparation of ultra-dispersed nano diamond hydrosol

Examples

Experimental program
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Effect test

Embodiment 1

[0035] a. Add 2g of nano-diamond raw powder obtained by detonation method (Qinghai Microcrystalline Nano Technology Co., Ltd.) into a high-temperature reactor, and add 40ml of concentrated HNO3 to react at 200°C for 4 hours. After the reaction, take out the nano-diamond with deionization The acidified nano-diamond was obtained by repeated washing with water to neutrality; through Fourier transform infrared spectroscopy and transmission electron microscopy, it was found that compared with the raw nano-diamond powder, the hydrophilic functional groups on the surface were more, and the lattice fringes were clearer. figure 2 and 3 .

[0036] b. Take 200g of ball milling beads with a diameter of 0.02-0.03mm and put them into a ball milling jar with a volume of 50ml, add 2g of acidified nano-diamond and 20ml of deionized water, and set up a ball mill (model: QM-DY2, Nanjing Nanda Instrument Factory ) rotating speed is 650r / min, the ball milling time is 6h, and ball milling is carr...

Embodiment 2

[0040] a. Add 2g of nano-diamond raw powder obtained by the detonation method into a high-temperature reaction kettle, and add 40ml of concentrated HNO3 to react at 200°C for 4 hours. After the reaction, take out the nano-diamond and wash it repeatedly with deionized water until neutral to obtain acidification nanodiamond.

[0041] b. Take 200g of ball milling beads with a diameter of 0.02-0.03mm and put them into a ball milling jar with a volume of 50ml, add 2g of acidified nano-diamonds and 20ml of deionized water, set the ball mill speed to 650r / min, and the ball milling time to 6h, A small amount of liquid nitrogen was introduced to maintain the temperature between 0°C and 20°C for ball milling to obtain an initially dispersed nano-diamond aqueous solution.

[0042] c. Add 60ml of deionized water to the taken out ball milling beads and nano-diamond aqueous solution for ultrasonication. The power is 800W, and the ultrasonication time is 3h.

[0043]d. Take out the nano-dia...

Embodiment 3

[0045] a. Add 2g of nano-diamond raw powder obtained by the detonation method into a high-temperature reaction kettle, and add 40ml of concentrated HNO3 to react at 200°C for 4 hours. After the reaction, take out the nano-diamond and wash it repeatedly with deionized water until neutral to obtain acidification nanodiamond.

[0046] b. Take 200g of ball milling beads with a diameter of 0.02-0.03mm and put them into a ball milling jar with a volume of 50ml, add 0.2g of acidified nano-diamond and 20ml of deionized water, set the speed of the ball mill to 650r / min, and the milling time to 6h , ball milling at room temperature to obtain the initial dispersion of nano-diamond aqueous solution.

[0047] c. Add 60ml of deionized water to the taken out ball milling beads and nano-diamond aqueous solution for ultrasonication. The power is 800W, and the ultrasonication time is 3h.

[0048] d. Take out the nano-diamond aqueous solution after ultrasonication and let it stand for one night...

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Abstract

The invention discloses a method for de-agglomerating a nano diamond, and particularly relates to a method for preparing nano diamond hydrosol. Due to a ball-milling mode, under the condition without any additive, stably dispersed nano diamond hydrosol is obtained; the method comprises the following technical processes: acidizing nano diamond raw powder, adding a certain amount of ball-milling beads and deionized water to carry out wet ball-milling; carrying out ultrasonic dispersion on the obtained nano diamond suspension and ball-milling beads; and finally standing and centrifugally processing the obtained suspension to remove impurities and large particles, so as to obtain nano diamond hydrosol of about 10nm. The hydrosol prepared by the method can be applied to the field of precision polishing; and with respect to agglomerated large-grained nano diamond, the nano diamond hydrosol has higher polishing accuracy, can be applied to mechanical performance enhancement application of composite materials as an additive, and simultaneously can also be applied to research of the field of biological drug transportation.

Description

technical field [0001] The invention belongs to the field of nano-diamond processing, and its application involves the fields of precision grinding, polishing, composite materials, biomedicine transportation, etc., in particular to a method for deagglomerating nano-diamonds, and in particular to a preparation method of 10nm nano-diamond hydrosol . Background technique [0002] In addition to inheriting the advantages of diamond, nano-diamond also has the characteristics of nano-materials, has excellent mechanical, thermal, optical, electrical properties, stable chemical properties and good biocompatibility, so it is used in precision grinding and polishing. And biomedicine and other fields have potential application value. Nano-diamonds are formed by agglomeration of particles with a size of 4-12nm. The average particle size of nano-diamonds produced industrially is about 2um, and the particle size ranges from several hundred nanometers to more than ten microns. Agglomerat...

Claims

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Application Information

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IPC IPC(8): C01B31/06C09G1/02A61K47/04B82Y30/00
Inventor 刘道彬王昌达亚西尔·阿布杜尔·哈利姆宋礼
Owner UNIV OF SCI & TECH OF CHINA
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