Titanium powder-polyvinylidene fluoride composite material for microwave ignition and preparation method thereof

A technology of polyvinylidene fluoride and composite materials, which is applied in the direction of explosives, etc., can solve the problems of late start and insufficient research, and achieve the effects of moderate burning rate, excellent chemical and physical stability, and large specific heat capacity

Inactive Publication Date: 2021-10-19
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the late start and the lack of deep research, the research results in the actual preparation of ignition powder are far less abundant than those of traditional medicaments.

Method used

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  • Titanium powder-polyvinylidene fluoride composite material for microwave ignition and preparation method thereof
  • Titanium powder-polyvinylidene fluoride composite material for microwave ignition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Suspension preparation

[0028] According to the present invention, 70.00 mg of titanium powder and 57.27 mg of polyvinylidene fluoride are weighed, and 1 ml of N,N-dimethylformamide is weighed to form a suspension. The prepared suspension was placed on a magnetic stirrer and stirred for 6 hours, and the stirred suspension was placed in an ultrasonic oscillator to vibrate for 1 hour.

[0029] (2) Suspension coating

[0030] Then spread the mixed suspension evenly on the glass slide, and then place the coated glass slide on a heating platform to heat and dry at a temperature of 90°C for 30 minutes. After 30 minutes, the suspension smeared on the glass slide was completely dried and turned into a composite material attached to the glass slide. Then the dried composite material and glass slides were transferred to a drying oven to cool down to room temperature naturally. The cooled composite material was gently peeled off from the glass slide to obtain a complete ti...

Embodiment 2

[0032] (1) Suspension preparation

[0033] According to the present invention, 70.00 mg of titanium powder and 46.67 mg of polyvinylidene fluoride are weighed, and 1 ml of N,N-dimethylformamide is weighed to form a suspension. The prepared suspension was placed on a magnetic stirrer and stirred for 6 hours, and the stirred suspension was placed in an ultrasonic oscillator to vibrate for 1 hour.

[0034] (2) Suspension injection molding

[0035] Then the mixed suspension is injected into a cylindrical mold in 4 times, the diameter of the bottom surface of the mold is 30mm, and the height is 10mm. The specific steps are:

[0036] (1) Inject 1 / 4 of the suspension into the mold, then place the injected mold on a heating table to heat and dry, set the temperature at 90°C, and bake for 30 minutes. (2) After 30 minutes, inject the suspension for the second time, and repeat step (1). (3) After 30 minutes, inject the suspension for the third time, and repeat step (1). (4) After 30...

Embodiment 3

[0038] (1) Suspension preparation

[0039] According to the present invention, 70.00 mg of titanium powder and 37.69 mg of polyvinylidene fluoride are weighed, and 1 ml of N,N-dimethylformamide is weighed to form a suspension. The prepared suspension was placed on a magnetic stirrer and stirred for 6 hours, and the stirred suspension was placed in an ultrasonic oscillator to vibrate for 1 hour.

[0040] (2) Suspension injection molding

[0041] Then inject the mixed suspension into the strip mold, and inject evenly along the slit on the mold, the slit is 150mm long, 5mm wide, and 5mm high. After the suspension is fully injected, gently flatten the mold and shake it twice on the table to make it flat. Then place the injected mold on the heating table to heat and dry, set the temperature at 90°C, and heat for 90 minutes. After 90 minutes, the suspension injected into the mold was completely dried and turned into a composite material attached to the slit. Then the dried compo...

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Abstract

The invention belongs to the field of micro-nano energetic materials, and particularly relates to a titanium powder-polyvinylidene fluoride composite material for microwave ignition and a preparation method. The material is prepared from the following components in percentage by mass: 55-75% of nano titanium powder and 45-25% of polyvinylidene fluoride (PVDF). The preparation method of the composite material comprises the following steps: dispersing nano titanium powder and polyvinylidene fluoride in a dispersing agent to form a turbid liquid, wherein N, N-dimethylacetamide or N, N-dimethylformamide is selected as the dispersing agent, and the polyvinylidene fluoride is adsorbed on the surface of the titanium powder under the intermolecular acting force; and mixing the prepared turbid liquid, drying, and stripping and forming after the solvent is completely volatilized. According to the invention, the titanium powder/polyvinylidene fluoride composite material microwave ignition agent has excellent chemical and physical stability in a natural environment, wherein the structure is a wrapped and dispersed structure; and the powder/polyvinylidene fluoride composite material microwave ignition agent is stable in long-term storage, painful to impact friction, painful to static electricity and sensitive to microwaves, is ignited in a microwave field in an air atmosphere, and is moderate in burning speed.

Description

technical field [0001] The invention belongs to the field of micro-nano energetic materials, and in particular relates to a titanium powder-polyvinylidene fluoride composite material for microwave ignition and a preparation method. Background technique [0002] For the ignition powder of the traditional ignition method, for example, the ignition powder of the impact needle is sensitive to mechanical action, and often encounters accidental impact due to high sensitivity, and accidental ignition occurs. Some electric ignition powders are sensitive to charge release, current and voltage. Since static electricity is easy to accumulate during storage and transportation, it is easy to accidentally ignite when the static electricity is released. [0003] Due to the input of microwave energy, mechanical action and electric current action have become alternative energy input forms, and the corresponding ignition powder does not need to be sensitive to mechanical action and electrical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B45/36C06B43/00C06B27/00
CPCC06B45/36C06B27/00C06B43/00
Inventor 叶迎华周宇轩张泽华李福伟王悦听程健
Owner NANJING UNIV OF SCI & TECH
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