Organic solvent coated nano boron particles as well as preparation method and application thereof
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
An organic solvent, nano-boron technology, applied in the method of granulating raw materials, coating particles, nano-technology, etc., can solve problems such as application limitations of boron-containing propellants
Pending Publication Date: 2022-03-01
HARBIN ENG UNIV
View PDF5 Cites 0 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0003] Although the preparation method of nano-boron powder is very mature, the practical application of boron-containing propellants is still limited. The main reason is th
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
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
preparation example Construction
[0026] The present invention also provides a method for preparing organic solvent-coated nano-boron particles described in the above technical solution, comprising the following steps:
[0027] Dispersing nano-boron powder in an alcohol-water mixed solvent to obtain a boron dispersion;
[0028] mixing the boron dispersion with an organic solvent to obtain organic solvent-coated boron nanoparticles;
[0029] Described organic solvent is ethylenediamine or gasoline.
[0030] Unless otherwise specified, the present invention has no special requirements on the sources of the raw materials used for the preparation, and commercially available products well known to those skilled in the art can be used.
[0031] The invention disperses the nanometer boron powder in the mixed solvent of alcohol and water to obtain the boron dispersion liquid.
[0032] In the present invention, the average particle size of the nano boron powder is preferably 200nm.
[0033] In the present invention,...
Embodiment 1
[0049] Weigh 0.2g of nano-boron powder (average particle size is 200nm) and add it into 100mL (92.80g) alcohol-water mixed solvent (the volume ratio of absolute ethanol and water is 1:1), and disperse at 25°C with an ultrasonic disperser 40min (dispersing power is 500W), obtain dispersion liquid;
[0050]Add 5 mL of ethylenediamine (4.50 g) dropwise to 25 mL of the above dispersion, stir magnetically at 25°C for 1 h at a stirring rate of 300 r / min, let stand for 50 min, and filter the resulting oil phase under reduced pressure. The obtained solid material was dried for 30 minutes under vacuum conditions of MPa and 70° C. to obtain organic solvent-coated boron nanoparticles.
Embodiment 2
[0052] The difference from Example 1 is that the consumption of ethylenediamine is 10mL, and the rest of the contents are consistent.
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
Property
Measurement
Unit
The average particle size
aaaaa
aaaaa
Login to view more
Abstract
The invention belongs to the technical field of organic and inorganic composite nanoparticles, and particularly relates to an organic solvent coated nano boron particle as well as a preparation method and application thereof. The organic-solvent-coated nano boron particle provided by the invention has the organic coating layer coated on the surface of the nano boron particle, the organic coating layer is adsorbed on the surface of the nano boron particle through chemical adsorption and physical adsorption, the organic coating layer can effectively isolate oxygen in an external environment from entering the nano boron particle, the nano boron particle is prevented from being oxidized, and in addition, the organic-solvent-coated nano boron particle can be used for preparing the organic-solvent-coated nano boron particle. The compatibility between the organic coating layer coating the surfaces of the nano boron particles and the boron-containing propellant component is good, the ignition point of the organic coating layer is low, gas generated after combustion is beneficial to breaking a boron oxide layer, and the ignition and combustion performance of the boron particles is improved.
Description
technical field [0001] The invention belongs to the technical field of organic-inorganic composite nanoparticles, and in particular relates to an organic solvent-coated nano-boron particle and a preparation method and application thereof. Background technique [0002] In recent years, nanomaterials have unique properties different from bulk materials due to the size effect, making them have important applications in the field of energetic materials. Energetic materials can rapidly release a large amount of heat during combustion. However, traditional organic high-energy materials such as aluminum have limited energy density, which limits their applications. The mass energy density of boron is 59kJ / g, and the volume energy density is 138kJ / cm 3 , respectively 1.9 times and 1.66 times that of aluminum. In recent years, boron has been widely used in pyrotechnics, delayed ignition powder and propellant and other fields. [0003] Although the preparation method of nano-boron p...
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
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more