Method for preparing nanometer aluminum composite powder coated with nitro-cotton

A technology of composite powder and nitrocellulose bag, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problem of incomplete coating of nano-aluminum powder surface, poor oxidation resistance, large Agglomeration and other problems, to achieve the effect of improving antioxidant performance, preventing agglomeration, and maintaining activity
CN102581272AInactive Publication Date: 2012-07-18XIAN MODERN CHEM RES INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
XIAN MODERN CHEM RES INST
Publication Date
2012-07-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for preparing nanometer aluminum composite powder coated with nitro-cotton. The method includes the steps of: dispersing nanometer aluminum powder into absolute ethyl alcohol; adding silane coupling agent with the weight accounting for 5-10% of that of the nanometer aluminum powder to obtain nanometer aluminum powder treated by the silane coupling agent; dissolving the nitro-cotton and plasticizer into ethyl acetate or acetone; dispersing the nanometer aluminum powder treated by the silane coupling agent into cyclohexane to form cyclohexane dispersing agent; adding nitro-cotton liquor into the cyclohexane dispersing agent and evenly mixing the nitro-cotton liquor; and performing filtering and vacuum drying to obtain the nanometer aluminum composite powder coated with the nitro-cotton, wherein the weight of the nitro-cotton is 0.04-0.15 time that of the aluminum powder, and the weight of the plasticizer accounts for 3-10% of that of the nitro-cotton. The nanometer aluminum powder is firstly treated by the silane coupling agent and then coated with the nitro-cotton, the surface of the nanometer aluminum powder is effectively coated with the nitro-cotton, the activity of the nanometer aluminum powder can be kept, and the oxidation resistance of the nanometer aluminum powder is improved.
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Description

technical field

[0001] The invention relates to a preparation method of nano-aluminum composite powder coated with nitrocellulose. The composite powder can be used as a high-efficiency metal fuel for modified double base propellant (CMDB) and nitrate plasticized polyether propellant (NEPE). It belongs to the technical field of nanometer material preparation. Background technique

[0002] Aluminum powder is one of the commonly used additives in modern solid rocket propellants. Adding aluminum powder is the most effective and practical way to increase energy and suppress unstable combustion of rocket engines. Aluminum powder is widely used due to its high density, high combustion enthalpy and significant effect on improving the specific impulse of solid propellant, coupled with abundant materials and low cost. However, the ignition delay time of ordinary aluminum powder and micron-sized aluminum powder is long, the combustion efficiency is low, and it is easy to agglomerate ...

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
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