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A nanocomposite energetic material and its preparation method

A nano-composite and composite catalyst technology, which is used in offensive equipment, explosives processing equipment, nitroalkane compositions, etc., can solve the problem that energetic materials cannot be used in engineering, the energy increase of composite energetic materials is limited, and the quality of wet gel is very high. Poor and other problems, to achieve the effect of eliminating the insulation process, shortening the gel time, and good elasticity

Inactive Publication Date: 2017-11-07
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both of the above two documents use energetic frameworks to increase the output energy of nanocomposite energetic materials, but the price of GAP in the former is very high, which increases the manufacturing cost, making energetic materials unable to obtain a large number of engineering applications.
In the latter, although the cheap NC energetic precursor is used, the energy of RDX is much lower than that of HNIW, and the energy increase of its composite energetic materials will also be limited.
In addition, in the above-mentioned documents, acetone is used as a solvent, and T-12 is a catalyst, but due to the high polarity of acetone, the composite gel thus obtained is a paste-like substance, opaque and inelastic, and the wet gel quality is very poor, and When T-12 is used alone as the catalyst, the gel time is longer (usually > 1 day)

Method used

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  • A nanocomposite energetic material and its preparation method
  • A nanocomposite energetic material and its preparation method
  • A nanocomposite energetic material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029]Take 1.5g of NC containing 11.8% nitrogen and 2.25g of CL-20 and dissolve them in 37.5mL of ethyl acetate to obtain a colorless and transparent mixed solution. Add 0.27mL TDI, 0.03mL T-12 and 0.045g TEDA to the mixed solution under stirring, stop stirring after completely dissolving. After standing still, the color of the solution gradually changed from colorless to yellow, and then to reddish brown. After 15-20 minutes, the solution turned into a stagnant, transparent dark reddish brown wet gel. The obtained wet gel was sealed, and aged under normal temperature and pressure for 10 days. Afterwards, the aged wet gel was placed in a supercritical autoclave and heated with SCF-CO at 50 °C and 9.5 MPa 2 The fluid is extracted and dried to obtain the CL-20 / NC nanocomposite energetic material.

Embodiment 2

[0031] Take 2.55g of NC containing 12.0% nitrogen and 1.7g of CL-20 and dissolve them in 43mL of tetrahydrofuran to obtain a colorless and transparent mixed solution. Add 0.46mL TDI, 0.10mL T-12 and 0.0425g TEDA to the mixed solution under stirring, stop stirring after completely dissolving. After standing still, the color of the solution gradually changed from colorless to yellow, and then to reddish brown. After 15-20 minutes, the solution turned into a stagnant, transparent dark reddish brown wet gel. The obtained wet gel was sealed, and aged under normal temperature and pressure for 10 days. Afterwards, the aged wet gel was placed in a supercritical autoclave and heated with SCF-CO at 45 °C and 10.0 MPa 2 The fluid is extracted and dried to obtain the CL-20 / NC nanocomposite energetic material.

Embodiment 3

[0033] Take 2.6g of NC containing 12.0% nitrogen and 1.3g of CL-20 and dissolve them in 39mL of tetrahydrofuran to obtain a colorless and transparent mixed solution. Add 0.47mL TDI, 0.12mL T-12 and 0.026g TEDA to the mixed solution under stirring, stop stirring after completely dissolving. After standing still, the color of the solution gradually changed from colorless to yellow, and then to reddish brown. After 15-20 minutes, the solution turned into a stagnant, transparent dark reddish brown wet gel. The obtained wet gel was sealed, and aged under normal temperature and pressure for 10 days. Afterwards, put the aged wet gel into a supercritical autoclave, and use SCF-CO at 40 °C and 9.0 MPa 2 The fluid is extracted and dried to obtain the CL-20 / NC nanocomposite energetic material.

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Abstract

The invention discloses a nano-composite energetic material. The nano-composite energetic material is prepared through the steps that CL-20 and NC are taken as raw materials and then dissolved in weak-polar solvent according to the mass ratio (0.1-3):1 of the CL-20 to the NC to be prepared into a transparent solution, an isocyanate curing agent and a composite catalyst of T-12 and TEDA are added to form wet gel, the solvent is removed through supercritical drying after the wet gel is aged, and then the aerogel-state nano-composite energetic material is obtained. The prepared composite energetic material has the nano-structure, is higher in energy and activity and lower in sensitivity, has the good prospect on the aspects of improving the security feature and energy releasing efficiency of energetic components and the like and can be applied to the fields of high-energy density materials such as solid propellants, explosives and powders and pyrotechnic compositions.

Description

technical field [0001] The invention relates to an energetic material, in particular to a hexanitrohexaazaisowurtzitane / nitrocellulose composite energetic material and a preparation method of the composite energetic material. The nanocomposite energetic material of the present invention has good prospects in improving the safety characteristics of energetic components, energy release efficiency and mechanical properties, and can be applied to the fields of solid propellants, explosives and pyrotechnics. Background technique [0002] The current main research direction of energetic materials is to pursue "high-energy insensitivity". "Energy" can be achieved by developing new high-energy components and tapping the potential of existing energetic components. Obviously, it is very difficult to develop a new single-substance energetic material with high energy density, good chemical stability and low sensitivity. Therefore, tapping the potential of existing energetic components ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C06B25/40C06B21/00
CPCC06B21/0016C06B21/0033C06B21/0091C06B25/40
Inventor 宋小兰王毅安崇伟宋丹王晶禹
Owner ZHONGBEI UNIV
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