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Method for dispersing nano combustion catalyst in composite propellant

A technology for burning catalysts and propellants, which is applied in the directions of non-explosive/non-thermal agent components, offensive equipment, ammonium perchlorate compositions, etc., can solve the problem of increasing the composite propellant process, high activity of composite particles, and increasing preparation costs, etc. problems, to achieve the effect of increasing the preparation cycle, the dispersion operation cycle is short, and the use risk is high

Active Publication Date: 2017-11-17
XIAN MODERN CHEM RES INST
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The method for dispersing nano-catalysts by composite particles has the problems of complex process and high risk, because in the HTPB composite propellant, the AP content is more than 70%, even if 20% AP is used to disperse nano-copper chromite, it will increase the composite The propellant process increases the preparation cost and complicates the process, and the composite particles have high activity and high risk of use

Method used

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  • Method for dispersing nano combustion catalyst in composite propellant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] In a 200mL beaker, add 0.05g Tween-80, 25g diisooctyl sebacate and 25g ethyl acetate, stir with a glass rod to get a solution, then add 5g of nano-combustion catalyst nano-chromous acid to the beaker Copper (d 50 50nm), stirred to make it fully infiltrated, ultrasonicated for 30 minutes to obtain a suspension of nano-combustion catalyst; added the above suspension to the 965g HTPB, AP, Al slurry that had been premixed uniformly, mixed with a kneader for 60 minutes, and heated at 50°C 20min at a vacuum degree of 50KPa, then degassing at a vacuum degree of 10KPa for 40min to remove ethyl acetate to complete the dispersion of the nano-combustion catalyst in the composite propellant, and finally add 5g of curing agent toluene diisocyanate (TDI) to complete the composite propellant Mixing of syrups.

[0015] Performance Testing

[0016] The test instrument is DSCQ200 Thermal Analyzer from TA Company

[0017] Test conditions: heating rate is 5°C / min, test range: room tempe...

Embodiment 2

[0022] The implementation method of this example is basically the same as that of Example 1, except that the surfactant is Tween-20, and the remaining components and their contents are the same as those of Example 1.

[0023] The test method is the same as in Example 1, and the results are shown in Table 3.

[0024] Table 3 Effect of dispersed nano C.C on propellant burning rate

[0025]

[0026] Above-mentioned result shows, adopts the present invention, nano-C.C / AP mixture thermal decomposition temperature also significantly reduces, is better than comparative method; Utilizes the propellant sample that this method is mixed, and its burning rate is also significantly higher than the non-dispersed containing nano-C.C. Composite propellant sample (sample 1).

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Abstract

The invention discloses a method for dispersing a nano combustion catalyst in a composite propellant, solving the problems of difficulty in dispersion, multiple steps and complicated process in the prior art. The dispersing method comprises the following steps: ultrasonically dispersing the nano combustion catalyst by utilizing a surfactant and a dispersion medium; adding the uniformly pre-mixed composite propellant into slurry of other components, and mixing, heating in low vacuum degree to remove the solvent in the dispersion medium, and dispersing the nano combustion catalyst in the composite propellant. According to the method disclosed by the invention, and the conventional ultrasonic dispersion and mixed dispersion by a kneading machine are adopted, so that uniform and stable dispersion between the nano combustion catalyst and the composite propellant is realized.

Description

technical field [0001] The invention relates to a method for dispersing nanometer materials, which is suitable for the preparation of high burning rate composite propellants containing nanometer combustion catalysts. Background technique [0002] Nano-combustion catalysts have small particle size, specific surface area, and high surface atomic ratio. They have high chemical activity and catalytic efficiency. They can replace micron-sized catalysts and can increase the burning rate of propellants. dispersion, its actual catalytic efficiency is greatly reduced. In order to improve the dispersion of nanocatalysts in composite propellants, "Research on Preparation of Energetic Catalytic Composite Nanomaterials". , preparing ammonium perchlorate (AP) coated nano-scale copper chromite (c.c) to form a composite particle method, the content of nano-scale copper chromite and ammonium perchlorate (c.c is 2%, the content of AP is 98% ) mixed and added to ethanol, and under the condit...

Claims

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Application Information

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IPC IPC(8): C06B23/00C06B29/22C06B21/00
CPCC06B21/00C06B23/007C06B29/22
Inventor 胥会祥李勇宏来安户石小兵赵西鹏李军强赵凤起高红旭冉秀伦范红杰李洋
Owner XIAN MODERN CHEM RES INST
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