Nucleocapsid energizing agent for propelling agent and method for preparing same

A core-shell catalyst and propellant technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of poor compatibility of composite particles, poor coating effect, complex process, etc. To achieve the effect of stable product quality, low price and simple operation process

Inactive Publication Date: 2009-10-07
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is not only complicated in process and high in cost, but also has poor compatibility of composite particles and poor coating effect.

Method used

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  • Nucleocapsid energizing agent for propelling agent and method for preparing same
  • Nucleocapsid energizing agent for propelling agent and method for preparing same
  • Nucleocapsid energizing agent for propelling agent and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Add mannose to 50 mL of deionized water to prepare a 100 g / L solution. Then add vanadium oxide powder to the solution to make it account for 30% of the mass of mannose, ultrasonically disperse the vanadium oxide powder for 0.5 h, transfer to an autoclave, and react at 160° C. for 6 h. After the reaction is finished, the material is naturally cooled and discharged, washed with deionized water, centrifuged, and the water-soluble impurities are removed several times, so that the upper layer solution after centrifugation can be clarified, and then the precipitate obtained by centrifugation is vacuum-dried to obtain Vanadium oxide@C core-shell structure materials. The product was identified as a core-shell structure by TEM electron microscopy, see figure 1 . Vanadium oxide was characterized by XRD before being coated with carbon layer as V 3 o 7 ·H 2 O, such as figure 2 The crystallinity of the vanadium oxide@C core-shell structure becomes worse after being covered by...

Embodiment 2

[0034] According to the same method as in Example 1, keeping other conditions unchanged, changing the types of different soluble sugars, and their concentrations were varied within the range of 50-1500 g / L. The characterization was carried out in the same manner as in Example 1, and it was confirmed that the vanadium oxide@C core-shell structure material was also obtained after the reaction.

Embodiment 3

[0036] By the same method as in Example 1, keeping other conditions unchanged, the quality of vanadium oxide was changed so that its quality varied within the range of 1-60% of the raw material quality. The characterization was carried out in the same manner as in Example 1, and it was confirmed that the vanadium oxide@C core-shell structure material was also obtained after the reaction.

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Abstract

The present invention discloses a nucleocapsid energizing agent for propelling agent and a method for preparing same, the energizing agent is a nucleocapsid structure energizing agent that carbon is encapsulated on a metallic oxide surfaced. The preparing method includes steps as follows: selecting one or some raw materials: address sugar, diose or soluble polysaccharide to mix according with random weight rate for confecting water solution 50-1500g/L, adding the surfactant or dispersant into the water solution, then adding the metallic oxide powder, the metallic oxide weight is 1-60% of the raw material total weight, the surfactants or dispersants weight is 0-4.5% of the metallic oxide weight, ultrasounding or stirring to distribute evenly, heating in 100-260 DEG C during 1-72 hours; reducing the product temperature to a room temperature, washing, centrifuging, removing the water-soluble impurity again and again, then vacuum drying for obtaining the nucleocapsid energizing agent. The nucleocapsid energizing agent has better compatibility with other component of the propelling agent, and has simple preparing technique, low cost, green process and is easy to mass production.

Description

technical field [0001] The invention relates to a core-shell catalyst for propellants and a preparation method thereof, which belongs to the technical field of inorganic chemistry and also belongs to the technical field of functional materials. Background technique [0002] Metal oxides (such as vanadium oxide, lead oxide, etc.) are commonly used combustion catalysts in propellants [(1) Singn NB, Ojha A K, Thermochim. Acta 2002, 390, 67; (2) Survase D V, Gupta M, Asthana SN , Prog. Cryst. Growth Charact. Mater. 2002, 45, 161; (3) Charavarthy R, Price E W, Sigman R K, J. Propul. Power 1991, 3, 471.]. In order to improve the catalytic performance of the catalyst, an effective method is to prepare the catalyst as nanoparticles to increase the active specific surface area of ​​the catalyst, thereby improving the catalytic efficiency. However, because nanoparticles are prone to agglomeration and are not easy to mix uniformly with other components of the propellant, it is difficu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/22B01J23/06B01J23/75B01J23/755B01J23/745B01J23/34B01J21/10B01J21/04B01J23/14B01J23/18B01J23/72B01J23/26B01J21/06B01J23/28B01J23/10B01J23/847B01J37/34B01J37/10
Inventor 黄驰刘兴海张依福易生平
Owner WUHAN UNIV
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