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Preparing method and applications of nano composite material GO-MgWO4

A nanocomposite material and nanotechnology, applied in the direction of nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problems of catalytic performance degradation, etc., and achieve the effect of simple synthesis method, rapid and stable combustion, and good environment

Active Publication Date: 2016-04-27
NORTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inventor's experimental group designed and synthesized MgWO 4 However, due to the extremely small size and relatively high surface energy of nanoparticles, there is an inevitable problem of agglomeration in practical use, which greatly reduces their catalytic performance.

Method used

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  • Preparing method and applications of nano composite material GO-MgWO4
  • Preparing method and applications of nano composite material GO-MgWO4
  • Preparing method and applications of nano composite material GO-MgWO4

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) 1.2mmolNa 2 WO 4 2H 2 O and 1.2mmolMg(NO 3 ) 2 ·6H 2 Dissolve O in 40mL ethylene glycol respectively, stir vigorously, adjust the pH value of the solution to 9 with 0.5mol / L NaOH, then transfer the mixed solution to a polytetrafluoroethylene-lined autoclave, and conduct a hydrothermal reaction at 250°C 24h, the precipitated product was washed with ethanol and dried to obtain MgWO 4 nanoparticles;

[0023] (2) Ultrasonic dispersion of GO in deionized water at a concentration of 1mgmL -1 ;

[0024] (3) Take 0.27gMgWO 4 wxya 4 The particle size of the nanoparticles is 20-30nm.

[0025] Also ultrasonically dispersed in deionized water for 30 minutes;

[0026] (4) Configure 0.1M HCl, drop into the suspension in (3), adjust its pH=3.5;

[0027] (5) Take 30mL of the GO solution prepared in (2) and add it to (4) + Modified MgWO 4 In the suspension, continue to sonicate for 2 hours to make it evenly mixed and dispersed;

[0028] (6) After precipitation, filtra...

Embodiment 2

[0033] The nanocomposite material GO-MgWO that is synthesized by embodiment 1 method 4 , mixed evenly with RDX at a mass ratio of 1:4, and carried out DSC measurement at a heating rate of 10°C to obtain Figure 4 The results shown show that the peak decomposition temperature of pure RDX is 242.9°C and the apparent heat release is 797Jg -1 , add GO, MgWO 4 and GO-MgWO 4 After that, the decomposition peak temperature of RDX decreased by 17.1℃, 1.7℃ and 23.7℃ respectively; the heat release increased to 978Jg -1 、832Jg -1 and 1039Jg -1 . Whether it is to reduce the maximum decomposition temperature of RDX or increase the apparent heat release, GO-MgWO 4 Both showed that GO, MgWO 4 higher catalytic activity.

Embodiment 3

[0035] The nanocomposite material GO-MgWO that is synthesized by embodiment 1 method 4 , mixed evenly with HMX at a mass ratio of 1:4, and carried out DSC measurement at a heating rate of 10°C to obtain Figure 5The results shown show that the peak decomposition temperature of pure HMX is 283.4°C and the apparent heat release is 851Jg -1 , add GO, MgWO 4 and GO-MgWO 4 After that, the decomposition peak temperatures of HMX decreased by 0.7°C, 6.4°C and 34.5°C, respectively, and the heat release was 895Jg -1 、913Jg -1 and 1346Jg -1 . Compared to GO, MgWO 4 , GO-MgWO 4 The thermal decomposition temperature of HMX is reduced the most, the apparent heat release is also increased the most, and the catalytic effect is the most prominent.

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Abstract

The invention relates to a preparing method and applications of a nano composite material GO-MgWO4. The related preparing method comprises: uniformly mixing a MgWO4 nano particle suspension with a pH of 3-5 and a GO solution and depositing, thus obtaining the GO-MgWO4 nano composite material. The first related application is the application of the GO-MgWO4 prepared by the method as a thermal decomposition catalyst of an energetic material RDX. The second related application is the application of the GO-MgWO4 prepared by the method as a thermal decomposition catalyst of an energetic material HMX. The nano composite material GO-MgWO4 fully plays a concerted catalysis action of the two, and is superior to the single component MgWO4 and GO in thermal decomposition catalyst effect of the energetic material RDX and HMX, and is desired to be used as a combustion catalyst of a solid propellant to realize the fast stable combustion of the solid propellant.

Description

technical field [0001] The invention belongs to the technical field of nanocomposite materials, in particular to a novel combustion catalyst GO-MgWO for solid propellant 4 preparation and use. Background technique [0002] Propellant is an important research field in military and aerospace technology. At present, solid propellants are developing in the direction of high energy, insensitivity, low characteristic signal, and environmental protection. RDX and HMX are the most common oxidizers in solid propellants, and their thermal decomposition performance plays a key role in propellant combustion behavior: the lower the thermal decomposition temperature and apparent activation energy of the two, the shorter the ignition lag time of the propellant. Shorter, higher burning rate [5-8] . In the past, researchers have been working on the development of single metal oxides (such as Fe 2 o 3 , CuO, NiO and Co 3 o 4 etc.) as a combustion catalyst. However, when two or more c...

Claims

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Application Information

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IPC IPC(8): B01J27/22B01J35/10C06D5/00B82Y30/00C06B23/00
CPCB82Y30/00C06B23/007B01J23/002B01J23/30B01J27/22B01J2523/00B01J35/61B01J2523/40B01J2523/22B01J2523/69
Inventor 徐抗震祖延清张钰高红旭任兆玉赵凤起
Owner NORTHWEST UNIV