Smokeless colloid new type spray flower medicine and its production process

Abstract

The application provides a novel smokeless colloid flower spraying agent and a production process thereof. The flower spraying agent comprises the following raw materials: nitrocellulose, a solvent, diphenylamine, hydroxyl-modified boron nitride, fluorinated graphite and an oxidizing agent. The combination of the fluorinated graphite and the hydroxyl-modified boron nitride enables the flower spraying agent to effectively dissipate energy through sliding when being rubbed and to maintain the integrity of the structure, thereby avoiding the concentration of hot spots caused by the collapse of local structures. The flower spraying agent is not prone to large cracks or structural damage when subjected to various mechanical actions, thereby improving the safety.

Description

Technical Field

[0001] This application relates to the field of spraying agent technology, and in particular to a novel smokeless colloidal spraying agent and its production process. Background Technology

[0002] Nitrocellulose is a traditional energetic matrix material widely used in the field of floristry, but it has the following problems: 1. It has high mechanical sensitivity and is prone to unexpected reactions when stimulated by external forces such as impact and friction; 2. Insufficient thermal stability; prone to decomposition and runaway under high temperature environments or long-term storage conditions. 3. Poor controllability of combustion, large fluctuations in burning rate, affecting the consistency of the ignition effect.

[0003] While adding a single desensitizing additive can reduce mechanical sensitivity to some extent, it has significant limitations: First, its effect on reducing friction sensitivity is limited and it is difficult to meet high safety standards; Secondly, under high heat flux conditions, local hot spots are easily formed, which can lead to secondary safety risks. Summary of the Invention

[0004] This application is made in view of the above-mentioned problems, and its purpose is to provide a novel smokeless colloidal spray and its production process.

[0005] Specifically, the first aspect of this application provides a novel smokeless colloidal sprayer, comprising the following raw materials for preparation: Nitrocellulose, solvent, diphenylamine, hydroxyl-modified boron nitride, fluorinated graphite, and oxidizing agent.

[0006] According to one of the technical solutions in this application, at least the following technical effects are achieved: In this application, nitrocellulose is used as the matrix and is plasticized by solvent to form an "energetic colloid" with high solid content, colloidal plasticity and morphological stability.

[0007] Nitrocellulose itself is an energetic component, and the solvent only plays a plasticizing role. It has high energy density and fast combustion speed.

[0008] When nitrocellulose is combined with an oxidant, the combustion of nitrocellulose tends to be more complete, mainly producing gaseous products and significantly reducing the generation of soot and solid particles.

[0009] Fluorinated graphite has excellent lubrication properties, and its ultra-low interlayer shear force can minimize friction.

[0010] Hydroxyl-modified boron nitride exhibits high thermal conductivity and stress dispersion. Its two-dimensional high thermal conductivity can rapidly dissipate localized hot spots generated by mechanical impact or friction; the interaction between its surface hydroxyl groups and nitrocellulose enhances interfacial bonding, improves the mechanical strength of sprayed pollen, and reduces internal microcracks.

[0011] When the spray is subjected to external friction, fluorinated graphite preferentially undergoes interlayer slip due to its extremely low interlayer shear force. This converts most of the stress into relative interlayer motion, thereby reducing the friction sensitivity.

[0012] In areas of high localized stress, the high-hardness surface of hydroxyl-modified boron nitride can act as a bearing support, preventing the soft matrix from being excessively compressed. Simultaneously, the interaction between the -OH groups on its surface and the nitrocellulose provides additional bonding force, enhancing the localized resistance to deformation.

[0013] By combining fluorinated graphite and hydroxyl-modified boron nitride, the spray can effectively dissipate energy through slippage when subjected to friction, while maintaining the integrity of the structure and avoiding hot spot concentration caused by local structural collapse. This makes the spray less prone to large cracks or structural damage when subjected to various mechanical forces, thereby improving safety.

[0014] According to some embodiments of this application, the novel smokeless colloidal sprayer comprises the following raw materials in parts by weight: The ingredients are: 100 parts nitrocellulose, 5-10 parts solvent, 1-5 parts diphenylamine, 1-10 parts hydroxyl-modified boron nitride, 0.5-5 parts fluorinated graphite, and 5-20 parts oxidant.

[0015] According to some embodiments of this application, the solvent includes at least one of ethyl acetate, acetone, and ethanol.

[0016] According to some embodiments of this application, the chemical formula of the fluorinated graphite is (CFx)n.

[0017] The value of x ranges from 0.5 to 1.25.

[0018] According to some embodiments of this application, the value of x ranges from 0.8 to 1.2.

[0019] According to some embodiments of this application, the D50 of the fluorinated graphite is 5μm~10μm.

[0020] According to some embodiments of this application, the raw materials for preparing the hydroxyl-modified boron nitride include: Boron nitride and strong bases.

[0021] According to some embodiments of this application, the D50 of the boron nitride is 1 μm to 2 μm.

[0022] According to some embodiments of this application, the strong alkali includes at least one of sodium hydroxide and potassium hydroxide.

[0023] According to some embodiments of this application, the oxidant includes at least one of potassium perchlorate, potassium chlorate, potassium nitrate, sodium nitrate, strontium nitrate, and barium nitrate.

[0024] The second aspect of this application provides a production process for the aforementioned novel smokeless colloidal spray, including the following steps: S1. Nitrocellulose, diphenylamine and solvent are plasticized to obtain micelles; Hydroxyl-modified boron nitride, fluorinated graphite, and an oxidant are mixed to form a mixed powder; S2. Mix the powder and the colloid and then knead them under vacuum to obtain the ointment; S3. After pressing the ointment into strips, granulate and dry it.

[0025] According to some embodiments of this application, the plasticizing temperature is 40°C to 45°C; According to some embodiments of this application, the plasticizing time is 0.5h to 1h.

[0026] According to some embodiments of this application, the vacuum degree of the vacuum kneading is below -0.09 MPa.

[0027] According to some embodiments of this application, the temperature of the vacuum kneading is 40°C to 45°C.

[0028] According to some embodiments of this application, the vacuum kneading time is 1h to 3h.

[0029] According to some embodiments of this application, the drying temperature is 40°C to 45°C.

[0030] According to some embodiments of this application, the drying time is 20h~30h.

[0031] According to some embodiments of this application, the method for preparing the hydroxyl-modified boron nitride includes the following steps: Boron nitride and a strong base are mixed and then hydrolyzed. The hydrolysis product was mixed with water and then sonicated. After sonication, solid and liquid were separated, and the solid phase was collected.

[0032] According to some embodiments of this application, the temperature of the hydrolysis treatment is 100℃~150℃.

[0033] According to some embodiments of this application, the hydrolysis treatment time is 20h~30h.

[0034] According to some embodiments of this application, the power of the ultrasound is 200W~400W.

[0035] According to some embodiments of this application, the ultrasound duration is 10h to 20h.

[0036] According to some embodiments of this application, the solid-phase drying process is described.

[0037] According to some embodiments of this application, the drying temperature is 50°C to 80°C.

[0038] According to some embodiments of this application, the drying process takes 4 to 8 hours. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this application clearer, the following description and illustration are provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application.

[0040] Obviously, the following description is merely some examples or embodiments of this application. Those skilled in the art can apply this application to other similar scenarios without any inventive effort. Furthermore, it is understood that although the effort involved in such development may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, any changes to design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as insufficient disclosure of the content of this application.

[0041] Unless otherwise specified, the terms "comprising" and "including" as used in this application can be open-ended or closed-ended. For example, "comprising" and "including" can mean that other components not listed may also be included, or that only the listed components may be included.

[0042] Unless otherwise specified, the term "or" is inclusive in this application. For example, the phrase "A or B" means "A, B, or both A and B". More specifically, the condition "A or B" is satisfied by any of the following conditions: A is true (or exists) and B is false (or does not exist); A is false (or does not exist) and B is true (or exists); or both A and B are true (or exist).

[0043] Fluorinated graphite, CAS No.: 11113-63-6, (CFx)n, x is approximately 0.81, D50 is 8μm.

[0044] The preparation method of hydroxylated boron nitride consists of the following steps: h-BN (hexagonal boron nitride with a D50 of 1.5 μm) was dispersed in a 5 mol / L NaOH solution (mass-volume ratio of 1 g: 100 mL) and hydrolyzed at 120 °C for 24 h. After hydrolysis, the product was washed and collected. The hydrolysis product was dispersed in water (mass-volume ratio of 1 g: 100 mL), sonicated at 300 W for 16 h, and the solid-liquid phase was collected and dried at 60 °C for 12 h to obtain hydroxylated boron nitride.

[0045] The CAS number of nitrocellulose is 9004-70-0; the nitrogen content is 12.6%.

[0046] Example 1 This embodiment describes a novel smokeless colloidal spray, composed of the following raw materials in parts by weight: 100 parts nitrocellulose, 8 parts solvent (ethanol), 3 parts diphenylamine, 3 parts hydroxyl-modified boron nitride, 2 parts fluorinated graphite, and 15 parts oxidant (potassium perchlorate).

[0047] The production process of the smokeless colloidal novel flower sprayer in this embodiment consists of the following steps: S1. Nitrocellulose, diphenylamine and solvent are plasticized at 40°C for 45 min to obtain micelles; Hydroxyl-modified boron nitride, fluorinated graphite, and oxidant were mixed for 5 minutes to form a mixed powder. S2. Mix the powder and the colloid and then knead them under vacuum at 45°C (pressure -0.09MPa) for 90 minutes to obtain the flower spraying paste. S3. After pressing the ointment into strips, granulate it and dry the granules at 45℃ for 24 hours.

[0048] Example 2 This embodiment describes a novel smokeless colloidal spray, composed of the following raw materials in parts by weight: 100 parts nitrocellulose, 6 parts solvent (ethanol), 2 parts diphenylamine, 1 part hydroxyl-modified boron nitride, 5 parts fluorinated graphite, and 5 parts oxidant (potassium perchlorate).

[0049] The preparation process in this embodiment is the same as that in Example 1.

[0050] Example 3 This embodiment describes a novel smokeless colloidal spray, composed of the following raw materials in parts by weight: 100 parts nitrocellulose, 10 parts solvent (ethanol), 4 parts diphenylamine, 10 parts hydroxyl-modified boron nitride, 0.5 parts fluorinated graphite, and 20 parts oxidant (potassium perchlorate).

[0051] The preparation process in this embodiment is the same as that in Example 1.

[0052] Example 4 This embodiment describes a novel smokeless colloidal spray, composed of the following raw materials in parts by weight: 100 parts nitrocellulose, 8 parts solvent (ethanol), 3 parts diphenylamine, 6 parts hydroxyl-modified boron nitride, 2 parts fluorinated graphite, and 12 parts oxidant (potassium perchlorate).

[0053] The preparation process in this embodiment is the same as that in Example 1.

[0054] Example 5 This embodiment describes a novel smokeless colloidal spray, composed of the following raw materials in parts by weight: 100 parts nitrocellulose, 8 parts solvent (ethanol), 3 parts diphenylamine, 2 parts hydroxyl-modified boron nitride, 3 parts fluorinated graphite, and 15 parts oxidant (potassium perchlorate).

[0055] The preparation process in this embodiment is the same as that in Example 1.

[0056] Comparative Example 1 This comparative example is a flower sprayer, composed of the following raw materials in parts by weight: 100 parts nitrocellulose, 8 parts solvent (ethanol), 3 parts diphenylamine, 2 parts boron nitride (hexagonal boron nitride with D50 of 1.5 μm), 3 parts fluorinated graphite, and 15 parts oxidant (potassium perchlorate).

[0057] The production process of the novel smokeless colloidal spray in this comparative example consists of the following steps: S1. Nitrocellulose, diphenylamine and solvent are plasticized at 40°C for 45 min to obtain micelles; Boron nitride, fluorinated graphite, and oxidant were mixed for 5 minutes to form a mixed powder; S2. Mix the powder and the colloid and then knead them under vacuum at 45°C (pressure -0.09MPa) for 90 minutes to obtain the flower spraying paste. S3. After pressing the ointment into strips, granulate it and dry the granules at 45℃ for 24 hours.

[0058] Comparative Example 2 This comparative example is a flower sprayer, composed of the following raw materials in parts by weight: 100 parts nitrocellulose, 8 parts solvent (ethanol), 3 parts diphenylamine, 2 parts hydroxyl-modified boron nitride, 3 parts graphite (D50 is 8μm) and 15 parts oxidant (potassium perchlorate).

[0059] The production process of the novel smokeless colloidal spray in this comparative example consists of the following steps: S1. Nitrocellulose, diphenylamine and solvent are plasticized at 40°C for 45 min to obtain micelles; Hydroxyl-modified boron nitride, graphite, and oxidant were mixed for 5 minutes to form a mixed powder. S2. Mix the powder and the colloid and then knead them under vacuum at 45°C (pressure -0.09MPa) for 90 minutes to obtain the flower spraying paste. S3. After pressing the ointment into strips, granulate it and dry the granules at 45℃ for 24 hours.

[0060] Comparative Example 3 This comparative example is a flower sprayer, composed of the following raw materials in parts by weight: 100 parts nitrocellulose, 8 parts solvent (ethanol), 3 parts diphenylamine, 2 parts boron nitride (hexagonal boron nitride with D50 of 1.5 μm), 3 parts graphite (D50 of 8 μm) and 15 parts oxidant (potassium perchlorate).

[0061] The production process of the novel smokeless colloidal spray in this comparative example consists of the following steps: S1. Nitrocellulose, diphenylamine and solvent are plasticized at 40°C for 45 min to obtain micelles; Boron nitride, graphite, and oxidant were mixed for 5 minutes to form a mixed powder. S2. Mix the powder and the colloid and then knead them under vacuum at 45°C (pressure -0.09MPa) for 90 minutes to obtain the flower spraying paste. S3. After pressing the ointment into strips, granulate it and dry the granules at 45℃ for 24 hours.

[0062] Comparative Example 4 This comparative example is a flower sprayer, composed of the following raw materials in parts by weight: 100 parts nitrocellulose, 8 parts solvent (ethanol), 3 parts diphenylamine, 3 parts fluorinated graphite, and 15 parts oxidant (potassium perchlorate).

[0063] The production process of the novel smokeless colloidal spray in this comparative example consists of the following steps: S1. Nitrocellulose, diphenylamine and solvent are plasticized at 40°C for 45 min to obtain micelles; Fluorinated graphite and oxidant were mixed for 5 minutes to form a mixed powder; S2. Mix the powder and the colloid and then knead them under vacuum at 45°C (pressure -0.09MPa) for 90 minutes to obtain the flower spraying paste. S3. After pressing the ointment into strips, granulate it and dry the granules at 45℃ for 24 hours.

[0064] Comparative Example 5 This comparative example is a flower sprayer, composed of the following raw materials in parts by weight: 100 parts nitrocellulose, 8 parts solvent (ethanol), 3 parts diphenylamine, 2 parts hydroxyl-modified boron nitride, and 15 parts oxidant (potassium perchlorate).

[0065] The production process of the novel smokeless colloidal spray in this comparative example consists of the following steps: S1. Nitrocellulose, diphenylamine and solvent are plasticized at 40°C for 45 min to obtain micelles; Hydroxyl-modified boron nitride and oxidant were mixed for 5 minutes to form a mixed powder; S2. Mix the powder and the colloid and then knead them under vacuum at 45°C (pressure -0.09MPa) for 90 minutes to obtain the flower spraying paste. S3. After pressing the ointment into strips, granulate it and dry the granules at 45℃ for 24 hours.

[0066] Impact sensitivity test: Impact sensitivity tests were conducted using an impact sensitivity meter. The test conditions for each group of experiments were: drop height 25 cm, drop weight 1.2 kg, temperature 16.5℃, relative humidity 63%, and 200 parallel measurements were performed (recording the number of explosions or combustions). The test results are expressed as the percentage of explosions. The test results are shown in Table 1.

[0067] Friction sensitivity test: Friction sensitivity was tested using a friction sensitivity meter. The test conditions for each group of experiments were: swing angle 90°, gauge pressure 3.92 MPa, drug dosage 20 mg, temperature 16.5℃, relative humidity 63%, and 200 parallel measurements were performed (recording the number of explosions, combustion, or obvious decomposition reactions). The test results were expressed as the percentage of explosions. The test results are shown in Table 1.

[0068] Table 1

[0069] In summary, the fluorinated graphite in this application exhibits excellent lubrication properties, with its ultra-low interlaminar shear force maximally reducing friction sensitivity. Hydroxyl-modified boron nitride provides efficient thermal conductivity and stress dispersion. Its two-dimensional high thermal conductivity rapidly dissipates localized hot spots generated by mechanical impact or friction; the interaction between its surface hydroxyl groups and nitrocellulose enhances interfacial bonding, improves the mechanical strength of the spraying agent, and reduces internal microcracks. When the spraying agent is subjected to external friction, the fluorinated graphite, due to its extremely low interlaminar shear force, preferentially undergoes interlaminar slippage. This converts most of the stress into relative interlaminar motion, thereby reducing friction sensitivity. In areas of high localized stress, the high-hardness surface of hydroxyl-modified boron nitride can act as a pressure-bearing support point, preventing excessive compression of the soft matrix. Simultaneously, the interaction between its surface -OH groups and nitrocellulose provides additional bonding force, enhancing the localized resistance to deformation. By combining fluorinated graphite and hydroxyl-modified boron nitride, the spray can effectively dissipate energy through slippage when subjected to friction, while maintaining the integrity of the structure and avoiding hot spot concentration caused by local structural collapse. This makes the spray less prone to large cracks or structural damage when subjected to various mechanical forces, thereby improving safety.

[0070] It should be noted that this application is not limited to the above-described embodiments. The above embodiments are merely examples, and any embodiments with the same structure and effect as the technical concept within the scope of this application are included in the technical scope of this application. Furthermore, various modifications that can be conceived by those skilled in the art to the embodiments, and other ways of constructing by combining some of the constituent elements of the embodiments, without departing from the spirit of this application, are also included in the scope of this application.

Claims

1. A novel smokeless colloidal spray, characterized in that, The following raw materials are included in the preparation: Nitrocellulose, solvent, diphenylamine, hydroxyl-modified boron nitride, fluorinated graphite, and oxidizing agent.

2. The novel smokeless colloidal spray according to claim 1, characterized in that, The preparation materials include the following parts by weight: The ingredients are: 100 parts nitrocellulose, 5-10 parts solvent, 1-5 parts diphenylamine, 1-10 parts hydroxyl-modified boron nitride, 0.5-5 parts fluorinated graphite, and 5-20 parts oxidant.

3. The novel smokeless colloidal sprayer according to claim 1, characterized in that, The solvent includes at least one of ethyl acetate, acetone, and ethanol.

4. The novel smokeless colloidal sprayer according to claim 1, characterized in that, The raw materials for preparing the hydroxyl-modified boron nitride include: Boron nitride and strong bases.

5. The novel smokeless colloidal sprayer according to claim 4, characterized in that, The D50 of the boron nitride is 1 μm to 2 μm; And / or, the strong base includes at least one of sodium hydroxide and potassium hydroxide.

6. The novel smokeless colloidal sprayer according to claim 1, characterized in that, The chemical formula of the fluorinated graphite is (CFx)n; Where x takes values ​​ranging from 0.5 to 1.25; And / or, the value of x ranges from 0.8 to 1.2; And / or, the D50 of the fluorinated graphite is 5μm~10μm.

7. The novel smokeless colloidal sprayer according to claim 1, characterized in that, The oxidant includes at least one of potassium perchlorate, potassium chlorate, potassium nitrate, sodium nitrate, strontium nitrate, and barium nitrate.

8. A production process for a novel smokeless colloidal sprayer as described in any one of claims 1 to 7, characterized in that, Includes the following steps: S1. Nitrocellulose, diphenylamine and solvent are plasticized to obtain micelles; Hydroxyl-modified boron nitride, fluorinated graphite, and an oxidant are mixed to form a mixed powder; S2. Mix the powder and the colloid and then knead them under vacuum to obtain the ointment; S3. After pressing the ointment into strips, granulate and dry it.

9. The production process according to claim 8, characterized in that, The plasticizing temperature is 40℃~45℃; And / or, the plasticizing time is 0.5h~1h; And / or, the vacuum degree of the vacuum kneading is below -0.09 MPa; And / or, the temperature of the vacuum kneading is 40℃~45℃; And / or, the vacuum kneading time is 1h to 3h; And / or, the drying temperature is 40°C to 45°C; And / or, the drying time is 20h~30h.

10. The production process according to claim 8, characterized in that, The method for preparing the hydroxyl-modified boron nitride includes the following steps: Boron nitride and a strong base are mixed and then hydrolyzed. The hydrolysis product was mixed with water and then sonicated. After sonication, solid and liquid were separated, and the solid phase was collected.

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