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Gel propellant as aerospace fuel, preparation method and use

A gel propellant, aerospace technology, applied in the direction of non-explosive filler/gelling agent/thickener, offensive equipment, compressed gas generation, etc., can solve the problem of poor safety, low stability, liquid fuel propellant Leakage and other problems can be improved to achieve the effect of improving rheological properties and high instantaneous recovery rate

Inactive Publication Date: 2019-02-19
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, liquid fuel propellants have significant disadvantages such as easy leakage, poor safety, and low stability during use.

Method used

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  • Gel propellant as aerospace fuel, preparation method and use
  • Gel propellant as aerospace fuel, preparation method and use
  • Gel propellant as aerospace fuel, preparation method and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Raw material 2,4-(3,4-dichlorobenzylidene)-D-methyl gluconate (II) used in the present invention is made by following method:

[0037]

[0038] Add 215.8 g of 50 wt % D-gluconic acid aqueous solution (0.55 mol of D-gluconic acid), 100 mL of methanol, and 200 mL of concentrated hydrochloric acid into a 1L four-necked flask equipped with mechanical stirring and a thermometer at room temperature, and stir at 200 rpm. Add a methanol solution of 3,4-dichlorobenzaldehyde (dissolve 87.5g (0.50mol) of 3,4-dichlorobenzaldehyde in 300mL of methanol), and the system becomes viscous after 4 hours of reaction. Minute speed stirring reaction for 20h, after the reaction is completed, add 100mL water to the system, stir for 2h and then filter with suction, wash the filter cake with a large amount of water until the pH is 6-7, then wash twice with 200mL of hot dichloromethane, and drain to obtain Product II, dried to 140g. The yield was 76%, and the melting point was 188.6-189.2°C. ...

Embodiment 2

[0040] The preparation method of acetal substituted glucamide, comprises the steps:

[0041] With 4-dimethylaminopyridine (DMAP) as catalyst, 2,4-(3,4-dichlorobenzylidene)-D-gluconic acid methyl ester (II) and aliphatic monoamine (C n h 2n+1 NH 2 , n=5, 6, 7, 8, 9, 10, 12, 14, 16 or 18) are raw materials, pyridine is the glucamide molecule (I) that acetal is substituted under the condition of solvent, and reaction equation is as follows .

[0042]

[0043] Said n=5, 6, 7, 8, 9, 10, 12, 14, 16 or 18.

[0044] Embodiment 1, embodiment 2 refer to Chinese patent CN104478847A

Embodiment 3

[0046] A preparation method of a gel propellant as aerospace fuel, comprising the following steps: adding acetal-substituted glucosamide to JP-10 so that the content of acetal-substituted glucosamide is 20 mg / mL, and heating to 165 ℃, stop stirring, cool to room temperature, see gel figure 1 .

[0047] Acetal substituted glucamide as shown in formula (I):

[0048]

[0049] Where n=8, it is named G8 (the products prepared in the following examples are all named according to this, such as n=5, named G5, etc.).

[0050] The gel is thermally reversible, that is, it is completely dissolved after heating, and then cooled to room temperature to form a transparent gel. This process can be repeated many times; the gel is thixotropic, that is, it can Destroy the gel into a solution, and partially or completely recover to a gel after standing for a period of time (see figure 2 ).

[0051] The acetal-substituted glucamide with n=18 is substituted for the acetal-substituted glucami...

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Abstract

The invention discloses a gel propellant adopted as an aerospace fuel, a preparation method and uses thereof. The preparation method comprises: adding acetal substituted glucamide to a solvent to achieve the acetal substituted glucamide content of 1-30 mg / mL, heating to a temperature of 150-180 DEG C under stirring, stopping the stirring, and cooling to a room temperature, wherein the solvent is JP-10 or RP-1. According to the present invention, the gel propellant adopted as the aerospace fuel has heat reversibility and thixotropy, has the high instantaneous recovering rate after the thixotropy, and can achieve the completely recovering state; the rheological property of the gel can be improved by adding the combustion-supporting agent nanometer powder; and the obtained gel propellant can be used as the aerospace fuel.

Description

technical field [0001] The invention belongs to the technical field of fine chemicals, and in particular relates to a gel propellant used as an aerospace fuel, a preparation method and an application. Background technique [0002] Supramolecular gels are usually formed by self-assembly of low-molecular-weight gelling factors (molecular weight <3000) through non-covalent interactions (such as hydrogen bonds, van der Waals interactions, π-π stacking interactions, hydrophobic effects, electrostatic interactions, etc.) A soft material between liquid and solid. Due to the dynamic reversibility of non-covalent bonds, the formation and depolymerization of supramolecular gels can easily occur, which endows this kind of soft materials with excellent thermal processability, recyclability, self-healing properties, and environmental irritation. Responsiveness. [0003] Commonly used organic fuels are alcohols, H 2 o 2 , Hydrazine, and high-density liquid hydrocarbon fuels (JP-5, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C06B23/00C06B27/00C06B43/00C06D5/00
CPCC06B23/001C06B27/00C06B43/00C06D5/00
Inventor 张宝宋健陈安琪
Owner TIANJIN UNIV
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