CN112169714A - Boron sol and preparation method thereof - Google Patents
Boron sol and preparation method thereof Download PDFInfo
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- CN112169714A CN112169714A CN202010956852.3A CN202010956852A CN112169714A CN 112169714 A CN112169714 A CN 112169714A CN 202010956852 A CN202010956852 A CN 202010956852A CN 112169714 A CN112169714 A CN 112169714A
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- boron
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
- B01J13/0004—Preparation of sols
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B35/00—Boron; Compounds thereof
- C01B35/02—Boron; Borides
- C01B35/023—Boron
Abstract
The invention relates to a boron sol and a preparation method thereof. The preparation process comprises the following steps: firstly, adding industrial boron powder into a dispersion medium according to a certain proportion, then fully stirring and ball-milling, stripping nano boron particles by an ultrasonic method, and finally preparing nano boron dispersion liquid by a centrifugal method, wherein the nano boron particles can be uniformly and stably dispersed in the solution to prepare the boron sol solution. The boron sol solution can be kept in a uniform and stable state for a long time, and does not generate any phenomena of precipitation, delamination and failure.
Description
Technical Field
The invention belongs to the technical field of nano boron sol, and particularly relates to stable nano boron sol and a preparation method thereof.
Background
Boron is used as a metalloid element, and the stable molecular structure of boron and the advantages of high hardness, high melting resistance, high electrical conductivity and other properties of boride formed at high temperature are widely applied to some high-tech fields. The boron powder can interact with oxygen, nitrogen, sulfur, halogen and carbon at high temperature to generate various compounds, can be directly compounded with a plurality of metals to generate metal boride, can also react with organic compounds to generate organic boron, and is used for surface coating materials in the semiconductor industry, powder metallurgy additives, thermal spraying and the like. The nanometer boron powder is used as a good filler of the composite material, improves the high-temperature oxidation process of the composite material, prolongs the service life of the material, and is applied to high-end fields of aerospace, military industry manufacturing, aircraft brake disc manufacturing and the like. In addition, the boron particles can also be applied to the fields of automobile safety airbag igniters, neutron absorbers of nuclear reactors, biological medicines and the like.
Chinese patent publication No. CN102849752A discloses a method for preparing boron nanoparticles by using plasma, which comprises introducing inert gas and mixed gas containing boron gas source into a plasma chamber, exciting the mixed gas by using a radio frequency source, and allowing the boron gas source to undergo decomposition reaction to produce boron nanoparticles with adjustable size in the range of 1-100 nm. Meanwhile, related articles report methods for preparing boron particles, such as a magnesiothermic reduction method, a self-propagating pyrometallurgical method, a molten salt electrolysis method, a thermal decomposition method and a wet chemical method. The production equipment and processes used in these methods are complex. In addition, nanopowders are generally prone to agglomeration, and therefore nanopowder dispersion techniques are very important for stable storage of nanopowders, as well as for their later use.
Due to the development of industrial technology, nano boron powder is increasingly applied to various fields. However, the nano particles have a tendency of spontaneous agglomeration, and the agglomerated nano boron powder can restrict the performance of the final product. Therefore, the development of stable nano boron suspension (boron sol) will further promote the wide application of nano boron in various fields, which is a very important subject. However, according to the knowledge of the applicant, no related technology of the nano boron sol is reported at present.
Disclosure of Invention
The invention aims to provide a nano boron dispersion liquid (boron sol) suitable for uniform and stable dispersion and a preparation method thereof. The technical concept of the invention is that the application of nano boron in various high-end fields is more and more extensive, but the agglomeration defect of nano particles influences the final performance of products, so that the boron sol and the preparation method thereof can further promote the application of boron in high-end fields such as aerospace, military manufacturing, aircraft brake disc manufacturing, automobile safety airbag ignition agents, neutron absorbers of nuclear reactors, biomedicine and the like.
The technical scheme of the invention is as follows:
the boron sol and the preparation method thereof comprise nanometer boron particles and a dispersion medium.
The content of the nano boron particles is 0.05% -20%.
The dispersion medium is one or more of deionized water, ethanol, isopropanol and the like.
The particle size range of the nanometer boron particles is 100-200 nanometers.
The preparation method of the boron sol is characterized by comprising the following steps:
(1) taking a certain amount of one or more mixed liquid of dispersion medium deionized water, ethanol and isopropanol.
Weighing a certain amount of boron powder with the weight percentage of 10-50%, fully stirring and uniformly mixing, and adding into a ball mill for ball milling for 3-12 hours.
And carrying out ultrasonic dispersion on the boron solution subjected to ball milling for 2-6 hours.
Centrifuging the ultrasonic dispersion liquid, centrifuging for 10 minutes at 8000-.
The preparation process used in the invention is simple and convenient, is easy for large-scale production, has good dispersion effect and can be stored for a long time.
Drawings
FIG. 1 is a Scanning Electron Microscope (SEM) image of the nano boron sol prepared in example 1.
Detailed description example 1: weighing 50 g of deionized water and 50 g of boron powder, fully stirring and uniformly mixing, adding into a zirconia ball milling tank, adding 500 g of zirconia balls with the diameter of 8 mm, carrying out ball milling for 12 hours, dispersing the boron solution after ball milling for 6 hours by using an ultrasonic wave dispersing instrument, finally centrifuging for 20000 minutes, taking supernatant and preparing to obtain uniformly and stably dispersed nano boron dispersion liquid (boron sol).
Example 2: weighing 90 g of deionized water and 10 g of boron powder, fully stirring and uniformly mixing, adding into a zirconia ball milling tank, adding 500 g of zirconia balls with the diameter of 8 mm, carrying out ball milling for 3 hours, dispersing the boron solution after ball milling for 2 hours by using an ultrasonic wave dispersing instrument, finally centrifuging 8000 turns for 10 minutes, taking supernate and preparing to obtain uniformly and stably dispersed nano boron dispersion liquid (boron sol).
Example 3: weighing 70 g of deionized water and 30 g of boron powder, fully stirring and uniformly mixing, adding into a zirconia ball milling tank, adding 500 g of zirconia balls with the diameter of 8 mm, carrying out ball milling for 4 hours, dispersing the boron solution after ball milling for 4 hours by using an ultrasonic wave dispersing instrument, centrifuging for 15000 minutes, taking supernatant and preparing to obtain uniformly and stably dispersed nano boron dispersion liquid (boron sol).
Example 4: weighing 80 g of deionized water and 20 g of boron powder, fully stirring and uniformly mixing, adding into a zirconia ball milling tank, adding 500 g of zirconia balls with the diameter of 8 mm, carrying out ball milling for 4 hours, dispersing the boron solution after ball milling for 4 hours by using an ultrasonic dispersion instrument, finally centrifuging for 20000 minutes, taking supernatant and preparing to obtain uniformly and stably dispersed nano boron dispersion liquid (boron sol).
Claims (7)
1. The boron sol is prepared with industrial boron powder as material and one or several kinds of deionized water, ethanol, isopropanol and other dispersing medium.
2. The boron sol and the method for preparing the same according to claim 1, wherein: the raw material is industrial boron powder, the source is wide, and the industrialization degree is high.
3. The boron sol and the method for preparing the same according to claim 1, wherein: the dispersion medium is one or more of deionized water, ethanol, isopropanol, etc.
4. The boron sol and the method for preparing the same according to claim 1, wherein: the boron nanoparticles are stripped by ball milling and ultrasound, the nano boron can form a stable colloid system with water, and finally the supernatant is taken by a centrifugal method to prepare the stable boron sol solution.
5. The boron sol and the method for preparing the same according to claim 1, wherein: the initial boron powder content is 10-50%.
6. The boron sol and the method for preparing the same according to claim 1, wherein: the content of boron nano particles in the boron sol prepared by the invention is 0.05-20%.
7. The boron sol and the method for preparing the same according to claim 1, wherein: the boron nano particle size in the boron sol prepared by the invention is 100-200 nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010956852.3A CN112169714A (en) | 2020-09-12 | 2020-09-12 | Boron sol and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010956852.3A CN112169714A (en) | 2020-09-12 | 2020-09-12 | Boron sol and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112169714A true CN112169714A (en) | 2021-01-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010956852.3A Withdrawn CN112169714A (en) | 2020-09-12 | 2020-09-12 | Boron sol and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112169714A (en) |
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2020
- 2020-09-12 CN CN202010956852.3A patent/CN112169714A/en not_active Withdrawn
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Application publication date: 20210105 |