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Method for preparing nano catalytic composite materials by utilizing integrating process of ultrasonic-film-anti-solvent method

A technology of nano-catalysis and composite materials, which is applied in the field of preparation of nano-catalysis composite materials in the integrated process of ultrasonic-membrane-anti-solvent method, which can solve the problem of uniform dispersion of nano-materials, difficulty in obtaining particle size and shape of nano-catalytic composites The problem of dispersion of materials and nanomaterials cannot be solved, so as to achieve the effect of simple process, low production cost and stable structure

Inactive Publication Date: 2010-10-20
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The conventional anti-solvent method has two problems to be solved: (1) It is difficult to uniformly disperse the nanomaterials into the non-solvent by conventional mechanical stirring, and the uniform dispersion of the nanomaterials in the non-solvent is the key to prepare homogeneously dispersed nanocatalytic composite materials. premise
(2) It is difficult to accurately control the supersaturation and diffusion degree of the solution by conventional methods, so it is difficult to obtain nano-catalytic composite materials with controllable particle size and morphology
However, in the process of preparing nanocomposites, the uniform dispersion of nanomaterials in antisolvent cannot be solved.

Method used

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  • Method for preparing nano catalytic composite materials by utilizing integrating process of ultrasonic-film-anti-solvent method
  • Method for preparing nano catalytic composite materials by utilizing integrating process of ultrasonic-film-anti-solvent method
  • Method for preparing nano catalytic composite materials by utilizing integrating process of ultrasonic-film-anti-solvent method

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Experimental program
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Effect test

Embodiment 1

[0029] Embodiment 1, nanometer Fe 2 o 3 Preparation of / AP Catalytic Composite

[0030] First, under the action of ultrasonic waves (ultrasonic power is 1000w, ultrasonic frequency is 10 6 Hz, ultrasonic time is 15min), a certain amount of nano-Fe 2 o 3 (30nm) dispersed in 200mL ethyl acetate. Then, under the action of 0.3MPa nitrogen, press 20mL of AP saturated acetone solution into the crystallization tank, then AP will be converted into nano-Fe 2 o 3 As the nucleus, grow on its surface and finally form nano-Fe 2 o 3 / AP Composite Particles. The prepared nanocomposite material was filtered, washed, and then vacuum-dried at 60° C. for 3 h.

Embodiment 2

[0031] Embodiment 2, the preparation of nanometer CuO / AP catalytic composite material

[0032] First, under the action of ultrasound (ultrasonic power is 1200w, ultrasonic frequency is 10 7 Hz, ultrasonic time is 20min), a certain amount of nano-CuO was dispersed in 300mL ethyl acetate. Then, under the action of 0.4MPa nitrogen, press 10mL of AP saturated DMF solution into the crystallization tank, then AP will use nano-CuO as the nucleus, grow on its surface and finally form nano-CuO / AP composite particles. The prepared nanocomposite material was filtered, washed, and then vacuum-dried at 60° C. for 3 h.

Embodiment 3

[0033] Embodiment 3 is basically the same as Embodiment 1, but has the following changes:

[0034] The nano catalyst is Co 2 o 3 ; The particle size of the nano-catalyst is 10nm.

[0035] The solvent of the ammonium perchlorate is water; the non-solvent of the ammonium perchlorate is ethanol.

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Abstract

The invention relates to a method for preparing nano catalytic composite materials by utilizing an integrating process of an ultrasonic-film-anti-solvent method, comprising the following steps of: (1) the ammonium porchlorate saturated solution preparation process: dissolving ammonium porchlorate into a proper solvent to prepare the ammonium porchlorate saturated solution at certain temperature; (2) the dispersing process of a nano catalyst: uniformly dispersing the nano catalyst into an anti-solvent under ultrasonic action; (3) the preparing process: adding the AP (ammonium porchlorate) saturated solution to a nonsolvent through a film tube under certain pressure, wherein after the anti-solvent carries out desolvation on the solvent, the ammonium porchlorate is separated out and covers on the surfaces of uniformly-dispersed nano particles to form the nano catalytic composite materials; (4) filtering and drying processes: firstly carrying out solid-liquid separation on nano composite particles; and (5) the drying process: drying separated materials at 50-150 DEG C to obtain the nano catalytic composite materials. The nano catalytic composite materials prepared by the method have stable structure, uniform nano catalyst dispersion and controllable particle diameter and appearance.

Description

technical field [0001] The invention relates to a preparation method of a nano catalytic composite material, in particular to a preparation method for preparing a nano catalytic composite material (nano catalyst / ammonium perchlorate composite material) through an integrated process of an ultrasonic-membrane-antisolvent method. Background technique [0002] Ammonium perchlorate-based solid propellant is a solid propellant that uses ammonium perchlorate as an oxidant. It is an important energetic material and plays an important role in many fields such as missile and aerospace technology. In order to improve the combustion performance of ammonium perchlorate-based solid propellants, the use of nano-catalysts has been proven to be an effective method. However, due to the characteristics of easy aggregation of nanoparticles, how to better disperse nanocatalysts has attracted the attention of researchers. [0003] The current method used to solve the agglomeration of nano-cataly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06D5/04B01J37/34B01J23/745B01J23/72B01J23/75B01J23/755B01J21/04
Inventor 马振叶顾正桂吴如军纪明卫
Owner NANJING NORMAL UNIVERSITY
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