CN114149295B - A kind of encapsulating molecular perovskite energetic material and preparation method thereof - Google Patents

Abstract

The invention provides a coated molecular perovskite energetic material and a preparation method thereof, belonging to the technical field of energetic material preparation, wherein the coated molecular perovskite energetic material is a microcosmic coating structure with a binder coated molecular perovskite energetic material; the coating material comprises 0.5-15% of binder and 85-99.5% of molecular perovskite energetic material by taking the total mass of the coating molecular perovskite energetic material as 100%. The coated molecular perovskite energetic material has a low high-molecular binder coating amount, the safety performance of the coated molecular perovskite energetic material is greatly improved while the mass ratio of the molecular perovskite energetic material is not remarkably reduced, and the mechanical sensitivity evaluation result shows that the mechanical sensitivity of the coated molecular perovskite energetic material can be improved by 30-300% relative to the raw material particles of the molecular perovskite energetic material; compared with the friction sensitivity explosion probability of the molecular perovskite energetic material raw material particles, the friction sensitivity explosion probability is reduced to 30% -90%, and the method has the advantage of good sense reduction and can promote the sense reduction and application of the molecular perovskite energetic material.

Description

A kind of encapsulating molecular perovskite energetic material and preparation method thereof

technical field

The invention belongs to the technical field of preparation of energetic materials, and in particular relates to an energetic material coated with molecular perovskite and a preparation method thereof.

Background technique

Molecular perovskite energetic material is a new type of energetic material synthesized by Chen Xiaoming for the first time in 2018. Because of its high detonation performance and cost-effective advantages, it has attracted extensive attention in the field of explosives. Taking (H ₂ dabco)[NH ₄ (ClO ₄ ) ₃ ] (DAP-4), a typical representative of molecular perovskite energetic materials, as an example, a small number of relevant units in the domestic explosives industry have carried out research on molecular perovskite energetic materials. The performance evaluation and optimization of DAP-4 and the initial exploration of application research show that the measured detonation heat value of DAP-4 is 5.691 kJ/g, and the measured detonation velocity can reach 8.5 km/s, showing better application potential. However, DAP-4 has poor mechanical sensitivity and safety, which seriously restricts its application in charge.

Contents of the invention

The invention provides a coated molecular perovskite energetic material and a preparation method thereof, which realizes the surface coating of the molecular perovskite energetic material and effectively solves the problem of high sensitivity of the molecular perovskite energetic material .

In order to achieve the above object, the present invention provides a coated molecular perovskite energetic material, which is a microscopic coating structure with a binder coated molecular perovskite energetic material;

Based on the total mass of the coated molecular perovskite energetic material as 100%, the raw material components and their mass fractions are as follows:

Binder: 0.5%～15%;

Molecular perovskite energetic materials: 85% to 99.5%.

Specifically, the molecular perovskite energetic material is a perchlorate-based molecular perovskite energetic material.

Specifically, the molecular perovskite energetic materials are (H ₂ dabco)[NH ₄ (ClO ₄ ) ₃ ] (DAP-4), (H ₂ dabco)[Na(ClO ₄ ) ₃ ] (DAP-1), (H ₂ dabco)[K(ClO ₄ ) ₃ ](DAP-2), (H ₂ mpz)[NH ₄ (ClO ₄ ) ₃ ](PAP-M4), (H ₂ pz)[NH ₄ (ClO ₄ ) ₃ ](PAP-4), (H ₂ hpz)[NH ₄ (ClO ₄ ) ₃ ](PAP-H4), (H ₂ dabco-O)[NH ₄ (ClO ₄ ) ₃ ](DAP-O4) , (H ₂ mdabco)[NH ₄ (ClO ₄ ) ₃ ](DAP-M4), (H ₂ dabco)[NH ₃ OH(ClO ₄ ) ₃ ](DAP-6) and (H ₂ dabco)[NH ₂ One of NH ₃ (ClO ₄ ) ₃ ] (DAP-7).

Specifically, the binder is one of Estane-5703, F ₂₆₀₂ , F ₂₆₀₄ , F ₂₃₁₁ , stearic acid and EPDM rubber.

The present invention also provides a method for preparing the above-mentioned coated molecular perovskite energetic material, comprising the following steps:

Step A, dissolving the binder in a solvent and completely dissolving it to obtain a binder-containing solution;

Step B, after pulverizing the molecular perovskite energetic material and hard agglomeration, adding the molecular perovskite energetic material crystal particles into the binder solution, so that the molecular perovskite energetic material is uniformly dispersed in the solution to form a suspension;

Step C, heating the suspension of the molecular perovskite energetic material to 50° C. to 60° C., stirring and volatilizing the solvent, and putting it into a vacuum oven to drive off the residual solvent after the solvent volatilizes to obtain a dry sample;

Step D, washing and filtering the dried sample and then drying to obtain a composite energetic material with a binder-coated molecular perovskite energetic material.

In step A, the solvent is a good solvent for dissolving the binder, and the dissolving time is 12h-24h.

In step B, grind the molecular perovskite energetic material with an agate mortar, smash the molecular perovskite energetic material into hard agglomerates, add the molecular perovskite energetic material crystal particles into the binder solution, and stir ultrasonically for 10 minutes to 20 minutes .

In step C, a water bath is used for heating.

In step D, the washing solvent is a liquid in which the polymer binder is insoluble and the molecular perovskite energetic material crystal is insoluble.

Preferably, the solvent is one of 1,2-dichloroethane, ethyl acetate, ethanol, and cyclohexane, and the washing solvent is ice water or ethanol.

The present invention has the following beneficial effects.

1. The present invention provides a coated molecular perovskite energetic material and a preparation method thereof. The coated molecular perovskite energetic material has a relatively low coating amount of polymer binder without significantly reducing At the same time, the mass ratio of molecular perovskite energetic materials has greatly improved the safety performance of coated molecular perovskite energetic materials. The results of mechanical sensitivity evaluation show that its mechanical sensitivity is higher than that of molecular perovskite energetic materials. It can be increased by 30%~300%; compared with the explosion probability of friction sensitivity of molecular perovskite energetic material particles, the explosion probability of friction sensitivity is reduced to 30%~90%, which shows that this method has a good advantage in reducing sensitivity. It can promote the desensitization and application of molecular perovskite energetic materials.

2. The preparation method of the above-mentioned coated molecular perovskite energetic material can regulate the content of the binder according to the requirements of safety performance, so as to realize the regulation of safety performance.

3. The preparation method of the above-mentioned coated molecular perovskite energetic material has a simple preparation process and is conducive to scale-up production.

Description of drawings

Fig. 1 is the SEM figure of raw material DAP-4 in embodiment 1;

FIG. 2 is a SEM image of the energetic material DAP-4 coated with Estane-5703 molecular perovskite in Example 1. FIG.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Example 1

A kind of encapsulating molecular perovskite energetic material, based on the overall mass of the encapsulating molecular perovskite energetic material being 100%, wherein, each raw material component and its mass fraction are as follows:

Binder Estane-5703: 0.5%;

Molecular perovskite energetic material DAP-4: 99.5%.

The specific steps of the preparation method of the above-mentioned coated molecular perovskite energetic material are as follows:

Step A: Dissolve 0.025g of Estane-5703 in 15ml of 1,2-dichloroethane, sonicate until completely dissolved to obtain Estane-5703 solution;

Step B. Gently grind the molecular perovskite energetic material DAP-4 with an agate mortar, crush its hard agglomerates, and then add 4.975g of DAP-4 particles into the Estane-5703 solution, and after ultrasonic dispersion, DAP-4 Disperse evenly in the solution;

Step C. Put the suspension of DAP-4 in a water bath at 50-60°C to stir and volatilize the solvent. After the solvent volatilizes, put it in a vacuum oven to drive off the residual solvent to obtain a dry sample;

Step D, wash the dried sample with ethanol, filter and dry to obtain the composite energetic material with Estane-5703-coated molecular perovskite energetic material DAP-4 described in this example.

Example 2

A kind of encapsulating molecular perovskite energetic material, based on the overall mass of the encapsulating molecular perovskite energetic material being 100%, wherein, each raw material component and its mass fraction are as follows:

Binder Estane-5703: 5%;

Molecular perovskite energetic material DAP-4: 95%.

The specific steps of the preparation method of the above-mentioned coated molecular perovskite energetic material are as follows:

Step A. Dissolve 0.25g of Estane-5703 in 15ml of 1,2-dichloroethane, and sonicate until completely dissolved to obtain Estane-5703 solution;

Step B. Gently grind the molecular perovskite energetic material DAP-4 with an agate mortar, crush its hard agglomerates, and then add 4.75g of DAP-4 particles into the Estane-5703 solution, and disperse it by ultrasonic to make DAP-4 Disperse evenly in the solution;

Step C. Put the suspension of DAP-4 in a water bath at 50-60°C to stir and volatilize the solvent. After the solvent volatilizes, put it in a vacuum oven to drive off the residual solvent to obtain a dry sample;

Step D, wash the dried sample with ethanol, filter and dry to obtain the composite energetic material with Estane-5703-coated molecular perovskite energetic material DAP-4 described in this example.

Example 3

A kind of encapsulating molecular perovskite energetic material, based on the overall mass of the encapsulating molecular perovskite energetic material being 100%, wherein, each raw material component and its mass fraction are as follows:

Binder Estane-5703: 15%;

Molecular perovskite energetic material DAP-4: 85%.

The specific steps of the preparation method of the above-mentioned coated molecular perovskite energetic material are as follows:

Step A. Dissolve 0.75g of Estane-5703 in 15ml of 1,2-dichloroethane, sonicate until completely dissolved to obtain Estane-5703 solution;

Step B. Gently grind the molecular perovskite energetic material DAP-4 with an agate mortar, crush its hard agglomerates, and then add 4.25g of DAP-4 particles into the Estane-5703 solution, and disperse it by ultrasonic to make DAP-4 Disperse evenly in the solution;

Step C. Put the suspension of DAP-4 in a water bath at 50-60°C to stir and volatilize the solvent. After the solvent volatilizes, put it in a vacuum oven to drive off the residual solvent to obtain a dry sample;

Step D, wash the dried sample with ethanol, filter and dry to obtain the composite energetic material with Estane-5703-coated molecular perovskite energetic material DAP-4 described in this example.

Example 4

A kind of encapsulating molecular perovskite energetic material, based on the overall mass of the encapsulating molecular perovskite energetic material being 100%, wherein, each raw material component and its mass fraction are as follows:

Binder F ₂₆₀₂ : 15%;

Molecular perovskite energetic material DAP-4: 85%.

The specific steps of the preparation method of the above-mentioned coated molecular perovskite energetic material are as follows:

Step A. Dissolve 0.75g of F ₂₆₀₂ in 15ml of ethyl acetate, sonicate until completely dissolved to obtain F ₂₆₀₂ solution;

Step B. Gently grind the molecular perovskite energetic material DAP-4 with an agate mortar, crush its hard agglomerates, and then add 4.25g of DAP-4 particles into the F ₂₆₀₂ solution. After ultrasonic dispersion, DAP-4 is in the Evenly dispersed in the solution;

Step C. Put the suspension of DAP-4 in a water bath at 50-60°C to stir and volatilize the solvent. After the solvent volatilizes, put it in a vacuum oven to drive off the residual solvent to obtain a dry sample;

Step D, wash the dried sample with ethanol, filter and dry to obtain the composite energetic material with F ₂₆₀₂ coated molecular perovskite energetic material DAP-4 described in this example.

Example 5

A kind of encapsulating molecular perovskite energetic material, based on the overall mass of the encapsulating molecular perovskite energetic material being 100%, wherein, each raw material component and its mass fraction are as follows:

Binder F ₂₆₀₄ : 15%;

Molecular perovskite energetic material DAP-4: 85%.

The specific steps of the preparation method of the above-mentioned coated molecular perovskite energetic material are as follows:

Step A. Dissolve 0.75g of F ₂₆₀₄ in 15ml of ethyl acetate, sonicate until completely dissolved to obtain F ₂₆₀₄ solution;

Step B. Gently grind the molecular perovskite energetic material DAP-4 with an agate mortar, crush its hard agglomerates, and then add 4.25g of DAP-4 particles into the F ₂₆₀₄ solution. After ultrasonic dispersion, DAP-4 is in the Evenly dispersed in the solution;

Step C. Put the suspension of DAP-4 in a water bath at 50-60°C to stir and volatilize the solvent. After the solvent volatilizes, put it in a vacuum oven to drive off the residual solvent to obtain a dry sample;

Step D, wash the dried sample with ethanol, filter and dry to obtain the composite energetic material with F _2604- coated molecular perovskite energetic material DAP-4 described in this example.

Example 6

A kind of encapsulating molecular perovskite energetic material, based on the overall mass of the encapsulating molecular perovskite energetic material being 100%, wherein, each raw material component and its mass fraction are as follows:

Binder F ₂₃₁₁ : 15%;

Molecular perovskite energetic material DAP-4: 85%.

The specific steps of the preparation method of the above-mentioned coated molecular perovskite energetic material are as follows:

Step A. Dissolve 0.75g of F ₂₃₁₁ in 15ml of ethyl acetate, sonicate until completely dissolved to obtain F ₂₃₁₁ solution;

Step B. Gently grind the molecular perovskite energetic material DAP-4 with an agate mortar, crush its hard agglomerates, and then add 4.25g of DAP-4 particles into the F ₂₃₁₁ solution, and disperse it by ultrasonic, so that DAP-4 is in the Evenly dispersed in the solution;

Step C. Put the suspension of DAP-4 in a water bath at 50-60°C to stir and volatilize the solvent. After the solvent volatilizes, put it in a vacuum oven to drive off the residual solvent to obtain a dry sample;

Step D, wash the dried sample with ethanol, filter and dry to obtain the composite energetic material with F _2311- coated molecular perovskite energetic material DAP-4 described in this example.

Example 7

A kind of encapsulating molecular perovskite energetic material, based on the overall mass of the encapsulating molecular perovskite energetic material being 100%, wherein, each raw material component and its mass fraction are as follows:

Binder stearic acid: 15%;

Molecular perovskite energetic material DAP-4: 85%.

The specific steps of the preparation method of the above-mentioned coated molecular perovskite energetic material are as follows:

Step A, dissolving 0.75 g of stearic acid in 15 ml of ethanol, ultrasonically until completely dissolved, to obtain a stearic acid solution;

Step B. Gently grind the molecular perovskite energetic material DAP-4 with an agate mortar, crush its hard agglomerates, then add 4.25g of DAP-4 particles into the stearic acid solution, and disperse by ultrasonic to make DAP-4 Disperse evenly in the solution;

Step C. Put the suspension of DAP-4 in a water bath at 50-60°C to stir and volatilize the solvent. After the solvent volatilizes, put it in a vacuum oven to drive off the residual solvent to obtain a dry sample;

Step D, wash the dried sample with ice water, filter and dry to obtain the composite energetic material with stearic acid-coated molecular perovskite energetic material DAP-4 described in this example.

Example 8

A kind of encapsulating molecular perovskite energetic material, based on the overall mass of the encapsulating molecular perovskite energetic material being 100%, wherein, each raw material component and its mass fraction are as follows:

Binder EPDM rubber: 15%;

Molecular perovskite energetic material DAP-4: 85%.

The specific steps of the preparation method of the above-mentioned coated molecular perovskite energetic material are as follows:

Step A, 0.75g of EPDM rubber is dissolved in 15ml of n-hexane, and ultrasonicated until completely dissolved to obtain EPDM solution;

Step B. Gently grind the molecular perovskite energetic material DAP-4 with an agate mortar, crush its hard agglomerates, and then add 4.25g of DAP-4 particles into the EPDM solution, and disperse them by ultrasonic waves, so that DAP-4 is uniformly dispersed in the solution;

Step C. Put the suspension of DAP-4 in a water bath at 50-60°C to stir and volatilize the solvent. After the solvent volatilizes, put it in a vacuum oven to drive off the residual solvent to obtain a dry sample;

Step D. Wash the dried sample with ethanol, filter and dry to obtain the composite energetic material with EPDM-coated molecular perovskite energetic material DAP-4 described in this example.

Example 9

A kind of encapsulating molecular perovskite energetic material, based on the overall mass of the encapsulating molecular perovskite energetic material being 100%, wherein, each raw material component and its mass fraction are as follows:

Binder Estane-5703: 15%;

Molecular perovskite energetic material PAP-4: 85%.

The specific steps of the preparation method of the above-mentioned coated molecular perovskite energetic material are as follows:

Step A. Dissolve 0.75g of Estane-5703 in 15ml of 1,2-dichloroethane, sonicate until completely dissolved to obtain Estane-5703 solution;

Step B. Gently grind the molecular perovskite energetic material PAP-4 with an agate mortar, crush its hard agglomerates, and then add 4.25g of PAP-4 particles into the Estane-5703 solution, and disperse it by ultrasonic to make PAP-4 Disperse evenly in the solution;

Step C. Put the suspension of PAP-4 in a water bath at 50-60°C to stir and volatilize the solvent. After the solvent volatilizes, put it in a vacuum oven to drive off the residual solvent to obtain a dry sample;

Step D. Wash the dried sample with ethanol, filter and dry to obtain the composite energetic material with Estane-5703-coated molecular perovskite energetic material PAP-4 described in this example.

Example 10

A kind of encapsulating molecular perovskite energetic material, based on the overall mass of the encapsulating molecular perovskite energetic material being 100%, wherein, each raw material component and its mass fraction are as follows:

Binder F ₂₆₀₂ : 15%;

Molecular perovskite energetic material PAP-H4: 85%.

The specific steps of the preparation method of the above-mentioned coated molecular perovskite energetic material are as follows:

Step A. Dissolve 0.75g of F ₂₆₀₂ in 15ml of ethyl acetate, sonicate until completely dissolved to obtain F ₂₆₀₂ solution;

Step B. Gently grind the molecular perovskite energetic material PAP-H4 with an agate mortar, crush its hard agglomerates, and then add 4.25g of PAP-H4 particles into the F ₂₆₀₂ solution, and after ultrasonic dispersion, make PAP-H4 in the Evenly dispersed in the solution;

Step C. Put the suspension of PAP-H4 into a water bath at 50-60°C to stir and volatilize the solvent. After the solvent volatilizes, put it into a vacuum oven to drive off the residual solvent to obtain a dry sample;

Step D, wash the dried sample with ethanol, filter and dry to obtain the composite energetic material with F ₂₆₀₂ coated molecular perovskite energetic material PAP-H4 described in this example.

Example 11

A kind of encapsulating molecular perovskite energetic material, based on the overall mass of the encapsulating molecular perovskite energetic material being 100%, wherein, each raw material component and its mass fraction are as follows:

Binder F ₂₆₀₄ : 15%;

Molecular perovskite energetic material PAP-4: 85%.

The specific steps of the preparation method of the above-mentioned coated molecular perovskite energetic material are as follows:

Step A. Dissolve 0.75g of F ₂₆₀₄ in 15ml of ethyl acetate, sonicate until completely dissolved to obtain F ₂₆₀₄ solution;

Step B. Use an agate mortar to gently grind the molecular perovskite energetic material PAP-4, crush its hard agglomerates, and then add 4.25g of PAP-4 particles into the F ₂₆₀₄ solution. After ultrasonic dispersion, the PAP-4 in the Evenly dispersed in the solution;

Step C. Put the suspension of PAP-4 in a water bath at 50-60°C to stir and volatilize the solvent. After the solvent volatilizes, put it in a vacuum oven to drive off the residual solvent to obtain a dry sample;

Step D, wash the dried sample with ethanol, filter and dry to obtain the composite energetic material with F ₂₆₀₄ coated molecular perovskite energetic material PAP-4 described in this example.

Example 12

A kind of encapsulating molecular perovskite energetic material, based on the overall mass of the encapsulating molecular perovskite energetic material being 100%, wherein, each raw material component and its mass fraction are as follows:

Binder F ₂₃₁₁ : 15%;

Molecular perovskite energetic material PAP-H4: 85%.

The specific steps of the preparation method of the above-mentioned coated molecular perovskite energetic material are as follows:

Step A. Dissolve 0.75g of F ₂₃₁₁ in 15ml of ethyl acetate, sonicate until completely dissolved to obtain F ₂₃₁₁ solution;

Step B. Gently grind the molecular perovskite energetic material PAP-H4 with an agate mortar, crush its hard agglomerates, and then add 4.25g of PAP-H4 particles into the F ₂₃₁₁ solution, and after ultrasonic dispersion, make PAP-H4 in the Evenly dispersed in the solution;

Step C. Put the suspension of PAP-H4 into a water bath at 50-60°C to stir and volatilize the solvent. After the solvent volatilizes, put it into a vacuum oven to drive off the residual solvent to obtain a dry sample;

Step D, wash the dried sample with ethanol, filter and dry to obtain the composite energetic material with F _2311- coated molecular perovskite energetic material PAP-H4 described in this example.

Example 13

A kind of coated molecular perovskite energetic material, based on the total mass of the coated molecular perovskite energetic material as 100%, wherein, each raw material component and its mass fraction are as follows:

Binder stearic acid: 15%;

Molecular perovskite energetic material PAP-4: 85%.

The specific steps of the preparation method of the above-mentioned coated molecular perovskite energetic material are as follows:

Step A, dissolving 0.75 g of stearic acid in 15 ml of ethanol, ultrasonically until completely dissolved, to obtain a stearic acid solution;

Step B. Gently grind the molecular perovskite energetic material PAP-4 with an agate mortar, crush its hard agglomerates, and then add 4.25g of PAP-4 particles into the stearic acid solution, and disperse by ultrasonic to make PAP-4 Disperse evenly in the solution;

Step C. Put the suspension of PAP-4 in a water bath at 50-60°C to stir and volatilize the solvent. After the solvent volatilizes, put it in a vacuum oven to drive off the residual solvent to obtain a dry sample;

Step D. Wash the dried sample with ice water, filter and dry to obtain the composite energetic material with stearic acid-coated molecular perovskite energetic material PAP-4 described in this example.

Example 14

A kind of encapsulating molecular perovskite energetic material, based on the overall mass of the encapsulating molecular perovskite energetic material being 100%, wherein, each raw material component and its mass fraction are as follows:

Binder EPDM rubber: 15%;

Molecular perovskite energetic material PAP-H4: 85%.

The specific steps of the preparation method of the above-mentioned coated molecular perovskite energetic material are as follows:

Step A, 0.75g of EPDM rubber is dissolved in 15ml of n-hexane, and ultrasonicated until completely dissolved to obtain EPDM solution;

Step B. Gently grind the molecular perovskite energetic material PAP-H4 with an agate mortar, crush its hard agglomerates, and then add 4.25g of PAP-H4 particles into the EPDM solution, and after ultrasonic dispersion, make PAP-H4 is uniformly dispersed in the solution;

Step C. Put the suspension of PAP-H4 into a water bath at 50-60°C to stir and volatilize the solvent. After the solvent volatilizes, put it into a vacuum oven to drive off the residual solvent to obtain a dry sample;

Step D, wash the dried sample with ethanol, filter and dry to obtain the composite energetic material with EPDM-coated molecular perovskite energetic material PAP-H4 described in this example.

Example 15

The final product prepared in Examples 1-14 is tested as follows:

(1) Scanning electron microscope (SEM) characterization: BCPCA Company, model: S4800.

In order to determine the components of the final product in Example 1, the raw materials and final product in Example 1 were subjected to scanning electron microscopy (SEM), and the results are shown in FIG. 1 . It can be seen from FIG. 1 that the final product is a composite energetic material with a coating structure, that is, the coating molecular perovskite energetic material DAP-4 described in Example 1. The SEM test results of the final products of Examples 2-14 are similar to those of Example 1.

(2) Mechanical sensitivity test. According to GJB-770B-1997, the 601 impact sensitivity characteristic drop height method and the friction sensitivity explosion probability method were used to test the mass heat of combustion of the final products in Examples 1-14.

Mechanical Sensitivity Test Method:

Using WL-1 impact sensitivity instrument, according to the drop height method of 601 impact sensitivity characteristics in GJB-770B-1997 (2.0 Kg drop weight; sample mass: 30 mg; sample number: 25), and 602 friction in GJB-770B-1997 Sensitivity Explosion probability method (2.0Kg pendulum; pendulum angle: 90°; pressure: 3.92 MPa; sample mass: 30 mg; sample number: 25) was used to evaluate the mechanical sensitivity to impact and friction.

The mechanical sensitivity of the final product in Examples 1 to 14 is tested, and the results are shown in Table 1:

Final product mechanical sensitivity in table 1 embodiment 1～14

It can be seen from the test results that the composite energetic material prepared by the method of coating the molecular perovskite energetic material of the present invention has a better advantage of reducing sensitivity.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. scope.

Claims (6)

1. The preparation method of the coated molecular perovskite energetic material is characterized by comprising the following steps of:

step A, taking the total mass of the coated molecular perovskite energetic material as 100%, the mass fraction of the binder is 0.5% -15%, and the binder is Estane-5703 and F ₂₆₀₂ 、F ₂₆₀₄ 、F ₂₃₁₁ Dissolving a binder in a solvent to obtain a binder-containing solution, wherein the binder is one of stearic acid and ethylene propylene terpolymer;

and step B, taking the total mass of the coated molecular perovskite energetic material as 100%, wherein the mass fraction of the molecular perovskite energetic material is 85% -99.5%, and the molecular perovskite energetic material is (H) ₂ dabco)[NH ₄ (ClO ₄ ) ₃ ]、(H ₂ dabco)[Na(ClO ₄ ) ₃ ]、(H ₂ dabco)[K(ClO ₄ ) ₃ ]、(H ₂ mpz)[NH ₄ (ClO ₄ ) ₃ ]、(H ₂ pz)[NH ₄ (ClO ₄ ) ₃ ]、(H ₂ hpz)[NH ₄ (ClO ₄ ) ₃ ]、(H ₂ dabco-O)[NH ₄ (ClO ₄ ) ₃ ]、(H ₂ mdabco)[NH ₄ (ClO ₄ ) ₃ ]、(H ₂ dabco)[NH ₃ OH(ClO ₄ ) ₃ ]And (H) ₂ dabco)[ NH ₂ NH ₃ (ClO ₄ ) ₃ ]After the molecular perovskite energetic material is crushed and hard agglomerated, adding the crystal particles of the molecular perovskite energetic material into a binder solution to uniformly disperse the molecular perovskite energetic material in the solution to form a suspension;

step C, heating the suspension of the molecular perovskite energetic material to 50-60 ℃, stirring and volatilizing the solvent, putting the suspension into a vacuum oven to expel residual solvent after the solvent is volatilized, and obtaining a dried sample;

and D, washing, filtering and drying the dried sample to obtain the composite energetic material with the binder coated molecular perovskite energetic material.

2. The method for preparing the coated molecular perovskite energetic material according to claim 1, wherein in the step A, the solvent is a good solvent for dissolving the binder, and the dissolving time is 12-24 h.

3. The preparation method of the coated molecular perovskite energetic material according to claim 2, wherein in the step B, the molecular perovskite energetic material is ground by an agate mortar, the hard agglomeration of the molecular perovskite energetic material is crushed, the crystal particles of the molecular perovskite energetic material are added into a binder solution, and the ultrasonic stirring is carried out for 10-20 min.

4. The method for preparing the coated molecular perovskite energetic material according to claim 3, wherein in step C, water bath heating is adopted.

5. The method for preparing the coated molecular perovskite energetic material according to claim 4, wherein in the step D, the washing solvent is an insoluble polymer binder and is a liquid of insoluble molecular perovskite energetic material crystals.

6. The method for preparing the coated molecular perovskite energetic material as claimed in claim 5, wherein the solvent is one of 1,2-dichloroethane, ethyl acetate, ethanol and cyclohexane, and the washing solvent is ice water or ethanol.

Images