Paraffin microcapsule with shell, preparation method of paraffin microcapsule and camouflage material

Abstract

The invention belongs to the technical field of microcapsules, and particularly relates to a paraffin microcapsule with a shell, a preparation method of the paraffin microcapsule and a camouflage material.The method comprises the steps that 1, octadecane paraffin, a solvent and a surface active agent are weighed in proportion, the octadecane paraffin and the surface active agent are poured into the solvent, then heat preservation is conducted for 60 min-80 min at the temperature of 60 DEG C-65 DEG C, and the shell is obtained; paraffin / water emulsion is obtained; step 2, adding a set amount of film-forming resin and a set amount of a curing agent into the paraffin / water emulsion, stirring to form paraffin microdroplets, and stopping stirring until the film-forming resin is completely adsorbed on the surfaces of the paraffin microdroplets to obtain solid particles; and step 3, filtering the solid particles through a screen, and drying to obtain the paraffin microcapsule with the shell. The preparation process is simple, the cost of the required raw materials is very low, and the camouflage material can be highly consistent with the background in the aspect of infrared radiation characteristics in all weathers when being applied to the camouflage material.

Description

Technical Field

[0001] The invention belongs to the technical field of phase change materials, and in particular relates to a paraffin microcapsule with an outer shell, a preparation method thereof and a camouflage material. Background Art

[0002] Multi-dimensional high-simulation camouflage materials are required to have the characteristics of full-time, all-round, multi-band, and all-weather integration with the background. At the same time, their optical characteristics, infrared radiation characteristics, and radar scattering characteristics must be highly consistent with the background.

[0003] Current camouflage materials such as camouflage nets and camouflage paints can meet the basic requirements of optical characteristics and radar scattering characteristics, but cannot meet the infrared radiation characteristics all day long. In other words, existing camouflage materials cannot simulate the temperature change of natural materials over time. Therefore, it is necessary to develop a material that is highly consistent with the background in terms of infrared radiation characteristics all day long.

[0004] At present, microencapsulation of phase change materials is applied in other fields. That is, microencapsulation technology is used to coat a layer of stable polymer film on the surface of solid-liquid phase change material particles to form a composite phase change material with a core-shell structure. However, the existing microcapsule preparation process is not simple enough, the preparation efficiency is low, and the cost is high.

[0005] In view of this, the present inventor provides a paraffin microcapsule with an outer shell, a preparation method thereof and a camouflage material to solve the above technical problems. Summary of the invention

[0006] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and to propose a paraffin microcapsule with an outer shell, a preparation method thereof and a camouflage material. The preparation method is simple, and the prepared paraffin microcapsule is applied to the camouflage material to ensure that the infrared radiation characteristics of the camouflage material are highly consistent with the background at all times.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] In one aspect, the present invention provides a method for preparing paraffin microcapsules having an outer shell, comprising the following steps:

[0009] Step 1, weighing octadecane paraffin, a solvent and a surfactant according to a proportion, and pouring the octadecane paraffin and the surfactant into the solvent, and then keeping the temperature at 60° C. to 65° C. for 60 min to 80 min to obtain a paraffin / water emulsion;

[0010] Step 2, adding a set amount of film-forming resin and curing agent to the paraffin / water emulsion, and stirring to form paraffin droplets, until the film-forming resin is completely adsorbed on the surface of the paraffin droplets and the stirring is stopped to obtain solid particles;

[0011] Step 3: filtering the solid particles through a sieve and drying them to obtain paraffin microcapsules with an outer shell.

[0012] Furthermore, in step 1, the mass ratio of the octadecane paraffin and the solvent is 1:1-3, and the surfactant accounts for 2%-10% of the total mass of the octadecane paraffin and the solvent.

[0013] Further, in step 1, the surfactant is sodium dodecylbenzene sulfonate;

[0014] The solvent is water.

[0015] Furthermore, in step 2, the mass ratio of the film-forming resin, the curing agent and the paraffin / water emulsion is 5-6:1:100-105.

[0016] Further, in step 2, the film-forming resin is any one of polyethylene, polystyrene, polyurea, epoxy resin, polyamide, urea-formaldehyde resin, and melamine-formaldehyde resin;

[0017] The curing agent is polyamide resin.

[0018] Furthermore, in step 2, mechanical stirring is selected and the rotation speed is set to 1500rad / min to 1800rad / min.

[0019] Furthermore, in step 3, the sieve is selected to have a mesh size of 50 to 200.

[0020] Furthermore, in step 3, during the drying process, the temperature is set at 30° C. to 40° C. and the time is set at 40 min to 70 min.

[0021] In another aspect, the present invention provides a paraffin microcapsule having an outer shell, which is prepared by the paraffin microcapsule preparation method as described above.

[0022] In another aspect, the present invention provides a camouflage material, wherein the raw materials for preparing the camouflage material include the paraffin microcapsules described above.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1) The present invention provides a method for preparing a paraffin microcapsule with an outer shell, which uses a film-forming resin to coat octadecane paraffin into microparticles with a core-shell structure, thereby providing a stable phase change space for the octadecane paraffin, preventing it from being lost, and ensuring overall stability in application. The preparation process is simple and the required raw materials are also low in cost.

[0025] 2) The present invention provides a paraffin microcapsule with an outer shell, which is applied to camouflage materials, so that the infrared radiation characteristics of the camouflage materials are highly consistent with the background at all times, solving the problem that the camouflage materials cannot simulate the temperature change law of natural materials over time. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are incorporated in and constitute a part of this specification and, together with the description, serve to explain the principles of the present invention.

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0028] Figure 1 The figure is a schematic diagram of the process of preparing paraffin microcapsules of the present invention. DETAILED DESCRIPTION

[0029] Here, exemplary embodiments will be described in detail, and the embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are only examples consistent with some aspects of the present invention described in detail in the appended claims.

[0030] Example 1

[0031] On the one hand, see Figure 1 This embodiment provides a method for preparing a paraffin microcapsule having an outer shell, comprising the following steps:

[0032] Step 1, weighing octadecane paraffin, water and sodium dodecylbenzene sulfonate in proportion, pouring the octadecane paraffin and sodium dodecylbenzene sulfonate into water, and then keeping the water at 60° C. for 80 minutes to melt the octadecane paraffin to form a paraffin / water emulsion;

[0033] Step 2, adding a set amount of epoxy resin and polyimide resin to the paraffin / water emulsion, and stirring to form paraffin droplets, and stopping stirring until the epoxy resin is completely adsorbed on the surface of the paraffin droplets to obtain solid particles;

[0034] Step 3: Filter the solid particles through a 50-mesh sieve and dry them at 30° C. for 70 minutes to obtain paraffin microcapsules with an outer shell.

[0035] Wherein, in step 1, the mass ratio of octadecane paraffin and sodium dodecylbenzene sulfonate is 1:1, and sodium dodecylbenzene sulfonate accounts for 2% of the total mass of octadecane paraffin and water.

[0036] In step 2, the mass ratio of the epoxy resin, the polyimide resin and the paraffin / water emulsion is 5:1:105.

[0037] In step 2, a stirrer is used for stirring, and the speed is set to 1500 rad / min.

[0038] On the other hand, the present invention provides a paraffin microcapsule with an outer shell, which is prepared by the paraffin microcapsule preparation method described in this embodiment.

[0039] In another aspect, the present invention provides a camouflage material, wherein the raw materials for preparing the camouflage material include the paraffin microcapsules of this embodiment.

[0040] Example 2

[0041] Step 1, weighing octadecane paraffin, water and sodium dodecylbenzene sulfonate in proportion, pouring the octadecane paraffin and sodium dodecylbenzene sulfonate into water, and then keeping the water at 62° C. for 70 minutes to melt the octadecane paraffin to form a paraffin / water emulsion;

[0042] Step 2, adding a set amount of polyethylene and polyimide resin to the paraffin / water emulsion, and stirring to form paraffin droplets, until the polyethylene is completely adsorbed on the surface of the paraffin droplets and the stirring is stopped to obtain solid particles;

[0043] Step 3: Filter the solid particles through a 120-mesh sieve and dry them at 35° C. for 55 min to obtain paraffin microcapsules with an outer shell.

[0044] Wherein, in step 1, the mass ratio of octadecane paraffin and sodium dodecylbenzene sulfonate is 1:2, and sodium dodecylbenzene sulfonate accounts for 6% of the total mass of octadecane paraffin and water.

[0045] In step 2, the mass ratio of the polyethylene, the polyimide resin and the paraffin / water emulsion is 6:1:100.

[0046] In step 2, a stirrer is used for stirring, and the speed is set to 1600 rad / min.

[0047] On the other hand, the present invention provides a paraffin microcapsule with an outer shell, which is prepared by the paraffin microcapsule preparation method described in this embodiment.

[0048] In another aspect, the present invention provides a camouflage material, wherein the raw materials for preparing the camouflage material include the paraffin microcapsules of this embodiment.

[0049] Example 3

[0050] Step 1, weighing octadecane paraffin, water and sodium dodecylbenzene sulfonate in proportion, pouring the octadecane paraffin and sodium dodecylbenzene sulfonate into water, and then keeping the water at 65° C. for 60 minutes to melt the octadecane paraffin to form a paraffin / water emulsion;

[0051] Step 2, adding a set amount of polystyrene and polyimide resin to the paraffin / water emulsion, and stirring to form paraffin droplets, and stopping stirring until the polystyrene is completely adsorbed on the surface of the paraffin droplets to obtain solid particles;

[0052] Step 3: Filter the solid particles through a 200-mesh sieve and dry them at 40° C. for 40 min to obtain paraffin microcapsules with an outer shell.

[0053] Wherein, in step 1, the mass ratio of octadecane paraffin and sodium dodecylbenzene sulfonate is 1:3, and sodium dodecylbenzene sulfonate accounts for 10% of the total mass of octadecane paraffin and water.

[0054] In step 2, the mass ratio of the polystyrene, the polyimide resin and the paraffin / water emulsion is 5:1:100.

[0055] In step 2, a stirrer is used for stirring, and the speed is set to 1800 rad / min.

[0056] On the other hand, the present invention provides a paraffin microcapsule with an outer shell, which is prepared by the paraffin microcapsule preparation method described in this embodiment.

[0057] In another aspect, the present invention provides a camouflage material, wherein the raw materials for preparing the camouflage material include the paraffin microcapsules of this embodiment.

[0058] Example 4

[0059] This embodiment is basically the same as Embodiment 1, except that polyurea is used as the film-forming resin in this embodiment.

[0060] Example 5

[0061] This embodiment is basically the same as Embodiment 1, except that in this embodiment, polyamide is used as the film-forming resin.

[0062] Example 6

[0063] This embodiment is basically the same as Embodiment 1, except that urea-formaldehyde resin is used as the film-forming resin in this embodiment.

[0064] Example 7

[0065] This embodiment is basically the same as Embodiment 1, except that in this embodiment, the film-forming resin is melamine-formaldehyde resin.

[0066] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention.

[0067] It should be understood that the present invention is not limited to what has been described above and that various modifications and changes may be made without departing from its scope. The scope of the present invention is limited only by the appended claims.

Claims

1. A method for preparing paraffin microcapsules with an outer shell, characterized in that: The following steps are involved: Step 1, weighing octadecane paraffin, a solvent and a surfactant according to a proportion, and pouring the octadecane paraffin and the surfactant into the solvent, and then keeping the temperature at 60° C. to 65° C. for 60 min to 80 min to obtain a paraffin / water emulsion; Step 2, adding a set amount of film-forming resin and curing agent to the paraffin / water emulsion, and stirring to form paraffin droplets, until the film-forming resin is completely adsorbed on the surface of the paraffin droplets and the stirring is stopped to obtain solid particles; Step 3: filtering the solid particles through a sieve and drying them to obtain paraffin microcapsules with an outer shell.

2. The method for preparing paraffin microcapsules with an outer shell according to claim 1, characterized in that: In step 1, the mass ratio of the octadecane paraffin wax to the solvent is 1:1-3, and the surfactant accounts for 2%-10% of the total mass of the octadecane paraffin wax and the solvent.

3. The method for preparing paraffin microcapsules with shells according to claim 1, characterized in that: In step 1, the surfactant is sodium dodecylbenzene sulfonate; The solvent is water.

4. The method for preparing paraffin microcapsules with shells according to claim 1, characterized in that: In step 2, the mass ratio of the film-forming resin, the curing agent and the paraffin / water emulsion is 5-6:1:100-105.

5. The method for preparing paraffin microcapsules with shells according to claim 1, characterized in that: In step 2, the film-forming resin is any one of polyethylene, polystyrene, polyurea, epoxy resin, polyamide, urea-formaldehyde resin, and melamine-formaldehyde resin; The curing agent is polyamide resin.

6. The method for preparing paraffin microcapsules with shells according to claim 1, characterized in that: In step 2, mechanical stirring is selected and the rotation speed is set to 1500rad / min to 1800rad / min.

7. The method for preparing paraffin microcapsules with shells according to claim 1, characterized in that: In step 3, the sieve is selected to have a mesh size of 50 to 200.

8. The method for preparing paraffin microcapsules with shells according to claim 1, characterized in that: In step 3, during the drying process, the temperature is set at 30° C. to 40° C. and the time is set at 40 min to 70 min.

9. A paraffin microcapsule having an outer shell, characterized in that: The paraffin microcapsule is prepared by the paraffin microcapsule preparation method according to any one of claims 1 to 8.

10. A camouflage material, characterized in that: The raw materials for preparing the camouflage material include the paraffin microcapsules described in claim 9.

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