Normal-temperature dispersion method for water-soluble oxidant in macromolecular material

A technology for polymer materials and oxidants, which is applied in the field of room temperature dispersion of water-soluble oxidants in polymer materials, can solve the problems of long dispersion time of oxidants, poor dispersion uniformity and stability, and many processes, and achieves easy process control and dispersion. The effect of small particle size and safe process

Inactive Publication Date: 2014-12-17
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the preparation of polymer composites containing water-soluble oxidants by traditional dispersion methods not only requires more processes, but also takes a long time to disperse the oxidants, and the dispersion uniformity and stability are relatively poor.

Method used

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  • Normal-temperature dispersion method for water-soluble oxidant in macromolecular material
  • Normal-temperature dispersion method for water-soluble oxidant in macromolecular material
  • Normal-temperature dispersion method for water-soluble oxidant in macromolecular material

Examples

Experimental program
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Effect test

Embodiment 1

[0047] Dispersion was carried out in a reactor with a volume of 1 liter. Nitrocellulose with a nitrogen content of 12.6% is used as the raw material of the polymer material. First, the nitrocellulose is added to the reactor, and then it is added into an ethyl acetate solvent 10 times the mass of the nitrocellulose under stirring. Stir and dissolve for 30min to obtain a polymer sol containing nitrocellulose, then continuously add an aqueous solution of ammonium perchlorate that has a mass concentration of 10% dissolved in advance in the polymer sol containing nitrocellulose under stirring, namely The oxidizing agent is ammonium perchlorate. The amount of ammonium perchlorate solution added is 0.4 times the volume of ethyl acetate solvent used to dissolve nitrocellulose. Stir continuously at room temperature for 30 minutes to 60 minutes. After fully emulsifying, the inner phase is Polymer emulsion of ammonium perchlorate aqueous solution. Then, the polymer emulsion was added in...

Embodiment 2

[0049] Using the same process as in Example 1, select nitrocellulose with a nitrogen content of 12.6% as a raw material, use ammonium perchlorate as an oxygenant, and have a solvent ratio of 10, and the mass concentration of the ammonium perchlorate aqueous solution added in the emulsification process is 10 %, the add-on is 0.2 times of the used solvent volume, and the ammonium perchlorate aqueous solution volume used for dispersion is 1.5 times of the used solvent volume, and other operating parameters are the same as in Example 1, and the content of ammonium perchlorate in the test containing energetic composite particles is 16.5%, the average diameter of ammonium perchlorate dispersed in the sample measured by electron microscope is 2.5 μm, after dissolving the energetic composite particles with ethyl acetate, apply them to a glass slide and observe the particle size distribution of ammonium perchlorate by optical microscope Such as figure 2 shown. It can be seen from the...

Embodiment 3

[0051] Adopting the same process as in Example 1, selecting nitrocellulose with a nitrogen content of 13.0% as a raw material, using ammonium perchlorate as a water-soluble oxidizing agent, the solvent ratio is 2, the quality of the ammonium perchlorate aqueous solution added in the emulsification process The concentration is 10%, and the addition is 0.6 times of the volume of the solvent used. The aqueous oxidant solution used for dispersion is changed to the mother liquor recovered in Example 1. The volume of the mother liquor is 1 time of the volume of the solvent used. Other operating parameters are the same as in Example 1. The test contains The content of ammonium perchlorate in the energy composite particle is 12.1%, and the average diameter of ammonium perchlorate dispersed in the sample is 2.8 μm as measured by electron microscope. From the above results, it can be seen that the particle size of the ammonium perchlorate particles dispersed in the prepared energetic com...

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Abstract

The invention discloses a normal-temperature dispersion method for a water-soluble oxidant in a macromolecular material. The method comprises the steps of firstly preparing an oxidant aqueous solution and solvent-containing macromolecular sol, then, enabling the oxidant aqueous solution to be emulsified into the macromolecular sol while stirring, so as to obtain a macromolecular emulsion, of which the inner phase is the oxidant aqueous solution, dispersing the macromolecular emulsion into spherical droplets with the oxidant aqueous solution with the same concentration, then, adding a large volume of oxidant aqueous solution into the system, enabling the spherical droplets to be gradually changed into solid particles, separating the solid particles containing the oxidant aqueous solution, and drying, thereby obtaining superfine oxidant-containing energetic composite particles. The separated aqueous solution is recycled after a solvent is recovered. The method disclosed by the invention achieves the normal-temperature superfine dispersion of the oxidant, has the advantages of short process flow, simplicity and convenience in operation, low power consumption, small oxidant dispersion particle size, uniformity in material mixing and the like, and is applicable to the superfine dispersion of various water-soluble oxidants in macromolecular materials.

Description

technical field [0001] The invention relates to a processing method of a polymer composite material, in particular to a method for dispersing a water-soluble oxidant in a polymer material at room temperature. Background technique [0002] Energetic materials containing water-soluble high-energy oxidants are an important part of solid energetic materials, which are widely used in the fields of propellants, propellants, explosives and explosives. Usually, the dispersion of water-soluble oxidants in polymer materials adopts physical methods, but as the particle size of the oxidants decreases, the uniform mixing of materials becomes more and more difficult, and the oxidants need to undergo strict ultra-fine grinding and sieving before they can be dispersed. fulfil requirements. For example, for the water-soluble oxidizer used in typical modified double-base high burning rate propellants, the industrial-grade oxidant product with relatively coarse particle size should be pulveri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/12C08J3/215
Inventor 蔺向阳郑文芳刘爱传李铎潘仁明黄振亚
Owner NANJING UNIV OF SCI & TECH
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