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Hyperdispersed antibacterial nanodiamond material and preparation method thereof

A nano-diamond and ultra-dispersion technology, which is applied in the field of diamond processing, can solve problems such as complicated steps and processes, changing the dispersion characteristics of nano-diamond, etc., and achieve the effect of easy-to-obtain raw materials, high yield, and broaden the application field

Inactive Publication Date: 2018-01-05
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] From previous studies, it has been found that the steps and process of diamond deagglomeration and improvement of dispersion stability, whether physical or chemical, are cumbersome and complicated. It is necessary to add dispersants and surfactants to the solution to improve dispersion stability, which has not been passed. Modification of diamond surface chemical groups essentially changes the dispersion characteristics of nanodiamonds
At present, there is no relevant research that incorporates the dispersion and antibacterial properties of nanodiamonds into the research category at the same time, and this field is a blank

Method used

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  • Hyperdispersed antibacterial nanodiamond material and preparation method thereof
  • Hyperdispersed antibacterial nanodiamond material and preparation method thereof
  • Hyperdispersed antibacterial nanodiamond material and preparation method thereof

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preparation example Construction

[0024] The preparation method of ultra-dispersed antibacterial nano-diamond material of the present invention, comprises the following steps:

[0025] a. Mechanically grinding the raw nano-diamond powder to obtain a nano-diamond aggregate with uniform particle size;

[0026] b. Dispersing the ground nano-diamonds in an ethanol solution;

[0027] c. add silane coupling agent 3-bromopropyltrimethoxysilane to the nano-diamond ethanol solution obtained in step b to react, wash, separate and dry after the reaction to obtain silanized nano-diamond;

[0028] d. Dispersing silanized nano-diamonds in a solvent, adding polytetravinylpyridine and brominated alkanes for reaction, precipitating and washing the reaction product with ether, centrifuging and drying to obtain the final product of quaternized nano-diamonds.

[0029] Preferably, the raw nano-diamond powder in step a is obtained by detonation method, and the hydrated particle size is 350.3nm. In step a, the larger nano-diamond ...

Embodiment 1

[0037] Step a: Mechanically grind the nano-diamonds with a mortar to disperse the larger aggregates into small aggregates with a relatively uniform particle size, and characterize it through a transmission electron microscope and a dynamic light scattering particle size analyzer, such as figure 1 and figure 2 , hydrated particle size 350.3nm;

[0038] Step b: Weigh 2 g of ground nano-diamonds and disperse them in 100 mL of 80% ethanol solution;

[0039] Step c: Add 3-bromopropyltrimethoxysilane of 5% nano-diamond mass to the above system, react at 40°C for 16 hours, wash with ethanol, filter and dry to obtain silanized nano-diamonds, which are analyzed by infrared representation, such as image 3 ;

[0040] Step d: Weigh 60 mg of silanized nano-diamonds and disperse them in the solvent nitromethane, add 0.3 g of polytetravinylpyridine and 0.12 g of hexyl bromide (silanized nano-diamonds: polytetravinyl pyridine: hexyl bromide=1: 5:2) After reacting at a temperature of 50°...

Embodiment 2

[0045] Step b: an ethanol solution with a mass fraction of 80%;

[0046] Step c: adding 3-bromopropyltrimethoxysilane with 5% nano-diamond mass to the nano-diamond ethanol solution obtained in step b to react for 16 hours at a reaction temperature of 40° C.;

[0047] Step d: The solvent is nitromethane, silanized nano-diamond:polytetravinylpyridine:bromohexane=1:5:0, the reaction temperature is 50°C, and the reaction is 24h.

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Abstract

The invention discloses a super-dispersed antibacterial nano-diamond material and a preparation method thereof. The steps include: mechanically grinding the original nano-diamond powder to obtain a nano-diamond aggregate with uniform particle size; dispersing the ground nano-diamond in an ethanol solution; adding a silane coupling agent 3-bromo to the nano-diamond ethanol solution obtained in step b Propyltrimethoxysilane reacts, washes, separates and dries after the reaction to obtain silanized nano-diamonds; disperses the silylated nano-diamonds in a solvent, and adds polytetravinylpyridine and brominated alkanes for reaction, and the reaction product is made of ether Precipitation, washing, centrifugation and drying to obtain the final product quaternized nano-diamond. Through this chemical modification method, nano-diamonds that are stably dispersed in water can be obtained, which can be used as additives in composite materials to increase their mechanical properties, used in the field of biomedicine as drug carriers, and can also be used as antibacterial materials in the field of dental restoration.

Description

technical field [0001] The invention belongs to the technical field of diamond processing, in particular to a super-dispersed antibacterial nano-diamond material and a preparation method thereof. Background technique [0002] Due to the excellent mechanical, optical, electrical, and thermal properties of nanodiamonds, unique chemical stability, abundant functional groups that can be modified on the surface, and good biocompatibility, it has potential application value in precision grinding, materials, and biomedical fields. . The particle size of the diamond particles prepared by the detonation synthesis method is generally below 10nm, the particle shape is regular, and the particle size is uniform. Aggregate to form agglomerates. The current bombardment synthesis technology is relatively mature, and the obtained nanodiamonds have unique physical and chemical properties. However, if the problem of deagglomeration and stability in solution cannot be solved well, the superio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/28B82Y30/00
Inventor 邢晓东曹巍巍彭雪峰陈晓琴
Owner NANJING UNIV OF SCI & TECH
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