CN111019451A

CN111019451A - Solar heat-absorbing coating capable of prolonging service life and preparation method thereof

Info

Publication number: CN111019451A
Application number: CN201911246679.1A
Authority: CN
Inventors: 刘骏
Original assignee: Hunan Taizi Chemical Coatings Co ltd
Current assignee: Hunan Taizi Chemical Coatings Co ltd
Priority date: 2019-12-06
Filing date: 2019-12-06
Publication date: 2020-04-17

Abstract

The invention discloses a solar heat-absorbing coating capable of prolonging the service life, which comprises the following raw materials in parts by weight: 20-25 parts of deionized water, 10-15 parts of nano composite powder, 6-8 parts of ferric oxide, 5-7 parts of adhesive and 4-6 parts of carbon black, and relates to the technical field of solar heat-absorbing coatings. According to the solar heat-absorbing coating capable of prolonging the service life and the preparation method thereof, the three transition metal oxides of metal foil, carbonate and silicon carbide are added into the base material as the additives, so that the wear resistance and high temperature resistance of the heat-absorbing coating can be effectively improved, and solar heat energy can be quickly absorbed, so that the solar light-heat conversion efficiency is improved, meanwhile, the corrosion resistance of the coating is improved by adding the carbonate, wherein the epoxy polyurethane resin has good adhesive force, the stability and weather resistance of the coating can be improved by the mutual matching use of the adhesive, the service life of the coating is prolonged, and the actual use requirements are met.

Description

Solar heat-absorbing coating capable of prolonging service life and preparation method thereof

Technical Field

The invention relates to the technical field of solar heat-absorbing coatings, in particular to a solar heat-absorbing coating capable of prolonging the service life and a preparation method thereof.

Background

The transition metal composite oxide is a multi-element complex oxide compounded by two or more transition metal oxides, has better properties than unit oxides, such as properties in the power supply, optical and magnetic fields, and the like, and also has the characteristics of good stability, corrosion resistance, high temperature resistance, high hardness and the like, and the transition metal composite oxide has various classification methods and can be divided into perovskite type, pyrochlore type, spinel type, fluorite type, scheelite type, rock salt type and the like according to the crystal structure; the composite oxide can be divided into integral ratio and non-integral ratio according to the stoichiometric ratio of metal elements and non-metal elements in the composition; according to the difference of chemical composition, the oxide can be divided into a front transition element composite oxide, a rare earth composite oxide, an iron-based composite oxide and the like.

Solar energy is regarded as a new renewable energy source, received very big attention and extensive use, solar energy heat absorption coating is the coating with light energy conversion heat energy, directly apply paint the surface of substrate with it, help the substrate to absorb the solar heat, the long-term adhesion of coating is on the substrate surface, receive external factor's influence easily, lead to the coating surface to produce more wearing and tearing, its weatherability and stability still remain to be improved, the adhesion degree between coating and the substrate is not high simultaneously, thereby cause the relatively poor problem of adhesive force, influence follow-up normal light and heat conversion work, do not accord with actual user demand.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a solar heat-absorbing coating capable of prolonging the service life and a preparation method thereof, and solves the problems that the coating is influenced by external factors, so that the surface of the coating is more worn, the weather resistance and the stability are poorer, and meanwhile, the adhesion between the coating and a base material is not high, so that the adhesion is poorer.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: a solar heat-absorbing coating capable of prolonging service life comprises the following raw materials in parts by weight: 20-25 parts of deionized water, 10-15 parts of nano composite powder, 6-8 parts of iron oxide, 5-7 parts of an adhesive, 4-6 parts of carbon black, 10-15 parts of graphene, 5-8 parts of a curing agent, 7-10 parts of epoxy polyurethane resin, 10-13 parts of absolute ethyl alcohol, 6-8 parts of a dispersing agent, 12-15 parts of polytetrafluoroethylene, 5-10 parts of aluminum oxide, 5-10 parts of silicon carbide, 10-12 parts of obsidian, 10-12 parts of metal platinum and 8-10 parts of carbonate.

Preferably, the raw materials comprise the following components: 20 parts of deionized water, 10 parts of nano composite powder, 6 parts of iron oxide, 5 parts of adhesive, 4 parts of carbon black, 10 parts of graphene, 5 parts of curing agent, 7 parts of epoxy polyurethane resin, 10 parts of absolute ethyl alcohol, 6 parts of dispersing agent, 12 parts of polytetrafluoroethylene, 5 parts of alumina, 5 parts of silicon carbide, 10 parts of obsidian, 10 parts of metal platinum and 8 parts of carbonate.

Preferably, the raw materials comprise the following components: 22 parts of deionized water, 13 parts of nano composite powder, 7 parts of iron oxide, 6 parts of a binder, 5 parts of carbon black, 13 parts of graphene, 6 parts of a curing agent, 9 parts of epoxy polyurethane resin, 12 parts of absolute ethyl alcohol, 7 parts of a dispersing agent, 14 parts of polytetrafluoroethylene, 8 parts of alumina, 8 parts of silicon carbide, 11 parts of obsidian, 11 parts of metal platinum and 9 parts of carbonate, wherein the carborundum, also known as silicon carbide (SiC), is prepared by smelting quartz sand, petroleum coke (or coal coke), wood chips (salt is required to be added when green carborundum is produced) and other raw materials at high temperature through a resistance furnace, rare minerals, such as morganite and silicon carbide are also known as carbon silica, and in modern C, N, B and other non-oxide high-technology refractory raw materials, the silicon carbide is one of the most widely-applied and most economical and can be named as emery or refractory sand.

Preferably, the raw materials comprise the following components: 25 parts of deionized water, 15 parts of nano composite powder, 8 parts of ferric oxide, 7 parts of adhesive, 6 parts of carbon black, 15 parts of graphene, 8 parts of curing agent, 10 parts of epoxy polyurethane resin, 13 parts of absolute ethyl alcohol, 8 parts of dispersing agent, 15 parts of polytetrafluoroethylene, 10 parts of alumina, 10 parts of silicon carbide, 12 parts of obsidian, 12 parts of metal platinum and 10 parts of carbonate, wherein the obsidian is natural colored glaze formed by suddenly cooling rock pulp flowing out of volcanic lava and belongs to amorphous precious stones, the main component of the slag is silicon dioxide (SiO2), and in the process of generation, because the temperature at the periphery of the lava flow is rapidly reduced, the cooling speed is fastest, silica-containing magma quickly clotted and obsidian usually appeared around the periphery of the lava stream or under the volcanic foot near the seaside, and because of its unique formation process, the crystal of obsidian also contained 1-2% water.

Preferably, the dispersant is one of sodium dodecyl sulfate and polyethylene glycol or polyvinylpyrrolidone.

Preferably, the adhesive adopts a silane coupling agent as a tackifier, and the tackifier has the action principle that the tackifier has two groups; a group can be bonded to the bonded backbone material; and the other group can be combined with a high polymer material or an adhesive, so that a chemical bond with higher strength is formed on a bonding interface, and the bonding strength is greatly improved.

Preferably, the graphene is formed by sp carbon atoms²The hybrid tracks form a hexagonal honeycomb lattice two-dimensional carbon nanomaterial.

The invention also discloses a preparation method of the solar heat-absorbing coating capable of prolonging the service life, which comprises the following steps:

s1, repeatedly centrifuging the graphene, washing the graphene to be neutral by using 8% HCl solution and absolute ethyl alcohol, then putting the graphene into a vacuum drying oven, fully drying the graphene at the temperature of 60-80 ℃, then grinding the graphene into powder by using a grinder to obtain graphene powder, and waiting for later use;

s2, putting deionized water, nano composite powder, ferric oxide, carbon black, polytetrafluoroethylene and epoxy polyurethane resin into a ball mill, grinding for 30-40min at the rotating speed of 300-400r/min to obtain a first mixture, taking out the ground product, and waiting for later use;

s3, putting alumina, silicon carbide, obsidian, metal platinum and carbonate into a high-speed stirrer, crushing for 50-60min at the rotating speed of 500-600r/min, putting into a muffle furnace after crushing and mixing uniformly, then sequentially adding a dispersing agent, a bonding agent and a curing agent, standing at the high temperature of 600-800 ℃, and naturally cooling to normal temperature after heating to obtain a second mixture;

s4, putting the first mixture obtained in the step S2 and the second mixture obtained in the step S3 into a dispersing machine, uniformly dispersing for 30-50min, taking out the materials after the dispersing is finished, putting the materials into a reaction kettle, dropwise adding 10% hydrogen peroxide, heating to 80-100 ℃ after the dropwise adding is finished, and preserving heat for 1-2h to finally obtain the solar heat absorbing coating.

(III) advantageous effects

The invention provides a solar heat-absorbing coating capable of prolonging the service life and a preparation method thereof. The method has the following beneficial effects: according to the preparation method of the solar heat-absorbing coating with the service life prolonged, graphene is repeatedly centrifuged through S1, washed to be neutral by 8% HCl solution and absolute ethyl alcohol, then placed in a vacuum drying oven, fully dried at the temperature of 60-80 ℃, ground into powder through a grinding machine, and graphene powder is obtained and is ready for use; s2, placing the nano-composite powder, the ferric oxide, the carbon black, the polytetrafluoroethylene and the epoxy polyurethane resin into a ball mill, grinding for 30-40min at the rotating speed of 300-400r/min to obtain a first mixture after grinding, and taking out the ground product for later use; s3, putting deionized water, alumina, silicon carbide, obsidian, metal platinum and carbonate into a high-speed stirrer, crushing for 50-60min at the rotating speed of 500-600r/min, putting into a muffle furnace after crushing and mixing uniformly, then sequentially adding a dispersing agent, a bonding agent and a curing agent, standing at the high temperature of 600-800 ℃, and naturally cooling to normal temperature after heating to obtain a second mixture; s4, putting the first mixture obtained in S2 and the second mixture in S3 into a dispersing machine, uniformly dispersing for 30-50min, taking out the materials after the dispersion is finished, putting the materials into a reaction kettle, dropwise adding 10% hydrogen peroxide, heating to 80-100 ℃ after the dropwise addition is finished, preserving the temperature for 1-2h to finally prepare the solar heat absorbing coating, adding three transition metal oxides, namely metal foil, carbonate and silicon carbide, into a base material as additives, so that the wear resistance and high temperature resistance of the heat absorbing coating can be effectively improved, solar heat can be rapidly absorbed, the photo-thermal conversion efficiency of solar energy is improved, meanwhile, the corrosion resistance of the coating is improved by adding the carbonate, the epoxy polyurethane resin has good adhesive force, and the stability and weather resistance of the coating can be improved by the mutual matching of adhesives, the service life of the coating is prolonged, and the actual use requirement is met.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The embodiment of the invention provides three technical schemes: a solar heat-absorbing coating capable of prolonging service life and a preparation method thereof specifically comprise the following embodiments:

example 1

S1, repeatedly centrifuging 10 parts of graphene, washing the graphene to be neutral by using 8% HCl solution and 10 parts of absolute ethyl alcohol, then putting the graphene into a vacuum drying oven, fully drying the graphene at the temperature of 60 ℃, then grinding the graphene into powder by using a grinder to obtain graphene powder, and waiting for later use;

s2, putting 10 parts of nano composite powder, 6 parts of iron oxide, 4 parts of carbon black, 12 parts of polytetrafluoroethylene and 7 parts of epoxy polyurethane resin into a ball mill, grinding for 30min at the rotating speed of 300r/min to obtain a first mixture after grinding, taking out a ground product, and waiting for later use;

s3, putting 20 parts of deionized water, 5 parts of alumina, 5 parts of silicon carbide, 10 parts of obsidian, 10 parts of metal platinum and 8 parts of carbonate into a high-speed stirrer, crushing for 50min at the rotating speed of 500r/min, putting into a muffle furnace after crushing and mixing uniformly, then sequentially adding 6 parts of dispersing agent, 5 parts of adhesive and 5 parts of curing agent, standing at the high temperature of 600 ℃, and naturally cooling to normal temperature after heating to obtain a second mixture;

s4, placing the first mixture obtained in the step S2 and the second mixture obtained in the step S3 into a dispersing machine, uniformly dispersing for 30min, taking out the materials after the dispersing is finished, placing the materials into a reaction kettle, dropwise adding 10% hydrogen peroxide, heating to 80 ℃ after the dropwise adding is finished, and preserving heat for 1h to finally obtain the solar heat-absorbing coating.

Example 2

S1, repeatedly centrifuging 13 parts of graphene, washing the graphene to be neutral by using 8% HCl solution and 12 parts of absolute ethyl alcohol, then putting the graphene into a vacuum drying oven, fully drying the graphene at the temperature of 70 ℃, then grinding the graphene into powder by using a grinder to obtain graphene powder, and waiting for later use;

s2, putting 13 parts of nano composite powder, 7 parts of iron oxide, 5 parts of carbon black, 14 parts of polytetrafluoroethylene and 9 parts of epoxy polyurethane resin into a ball mill, grinding for 35min at the rotating speed of 350r/min to obtain a first mixture after grinding, and taking out a ground product for later use;

s3, putting 22 parts of deionized water, 8 parts of alumina, 8 parts of silicon carbide, 11 parts of obsidian, 11 parts of metal platinum and 9 parts of carbonate into a high-speed stirrer, crushing for 55min at the rotating speed of 550r/min, putting into a muffle furnace after crushing and mixing uniformly, then sequentially adding 7 parts of dispersing agent, 6 parts of adhesive and 6 parts of curing agent, standing at the high temperature of 700 ℃, and naturally cooling to normal temperature after heating to obtain a second mixture;

s4, placing the first mixture obtained in the step S2 and the second mixture obtained in the step S3 into a dispersing machine, uniformly dispersing for 40min, taking out the materials after the dispersing is finished, placing the materials into a reaction kettle, dropwise adding 10% hydrogen peroxide, heating to 90 ℃ after the dropwise adding is finished, and preserving heat for 1.5h to finally obtain the solar heat-absorbing coating.

Example 3

S1, repeatedly centrifuging 15 parts of graphene, washing the graphene to be neutral by using 8% HCl solution and 13 parts of absolute ethyl alcohol, then putting the graphene into a vacuum drying oven, fully drying the graphene at the temperature of 80 ℃, then grinding the graphene into powder by using a grinder to obtain graphene powder, and waiting for later use;

s2, putting 15 parts of nano composite powder, 8 parts of iron oxide, 6 parts of carbon black, 15 parts of polytetrafluoroethylene and 10 parts of epoxy polyurethane resin into a ball mill, grinding for 40min at the rotating speed of 400r/min to obtain a first mixture after grinding, taking out a ground product, and waiting for later use;

s3, putting 25 parts of deionized water, 10 parts of alumina, 10 parts of silicon carbide, 12 parts of obsidian, 12 parts of metal platinum and 10 parts of carbonate into a high-speed stirrer, crushing for 60min at the rotating speed of 600r/min, putting into a muffle furnace after crushing and mixing uniformly, then sequentially adding 8 parts of dispersing agent, 7 parts of adhesive and 8 parts of curing agent, standing at the high temperature of 800 ℃, and naturally cooling to normal temperature after heating to obtain a second mixture;

s4, placing the first mixture obtained in the step S2 and the second mixture obtained in the step S3 into a dispersing machine, uniformly dispersing for 50min, taking out the materials after the dispersing is finished, placing the materials into a reaction kettle, dropwise adding 10% hydrogen peroxide, heating to 100 ℃ after the dropwise adding is finished, and preserving heat for 2h to finally obtain the solar heat-absorbing coating.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A solar heat-absorbing coating capable of prolonging service life comprises the following raw materials in parts by weight: 20-25 parts of deionized water, 10-15 parts of nano composite powder, 6-8 parts of iron oxide, 5-7 parts of an adhesive, 4-6 parts of carbon black, 10-15 parts of graphene, 5-8 parts of a curing agent, 7-10 parts of epoxy polyurethane resin, 10-13 parts of absolute ethyl alcohol, 6-8 parts of a dispersing agent, 12-15 parts of polytetrafluoroethylene, 5-10 parts of aluminum oxide, 5-10 parts of silicon carbide, 10-12 parts of obsidian, 10-12 parts of metal platinum and 8-10 parts of carbonate.

2. The solar heat absorbing coating capable of prolonging the service life of the solar heat absorbing coating as claimed in claim 1, wherein: the raw materials comprise the following components: 20 parts of deionized water, 10 parts of nano composite powder, 6 parts of iron oxide, 5 parts of adhesive, 4 parts of carbon black, 10 parts of graphene, 5 parts of curing agent, 7 parts of epoxy polyurethane resin, 10 parts of absolute ethyl alcohol, 6 parts of dispersing agent, 12 parts of polytetrafluoroethylene, 5 parts of alumina, 5 parts of silicon carbide, 10 parts of obsidian, 10 parts of metal platinum and 8 parts of carbonate.

3. The solar heat absorbing coating capable of prolonging the service life of the solar heat absorbing coating as claimed in claim 1, wherein: the raw materials comprise the following components: 22 parts of deionized water, 13 parts of nano composite powder, 7 parts of iron oxide, 6 parts of adhesive, 5 parts of carbon black, 13 parts of graphene, 6 parts of curing agent, 9 parts of epoxy polyurethane resin, 12 parts of absolute ethyl alcohol, 7 parts of dispersing agent, 14 parts of polytetrafluoroethylene, 8 parts of alumina, 8 parts of silicon carbide, 11 parts of obsidian, 11 parts of metal platinum and 9 parts of carbonate.

4. The solar heat absorbing coating capable of prolonging the service life of the solar heat absorbing coating as claimed in claim 1, wherein: the raw materials comprise the following components: 25 parts of deionized water, 15 parts of nano composite powder, 8 parts of iron oxide, 7 parts of adhesive, 6 parts of carbon black, 15 parts of graphene, 8 parts of curing agent, 10 parts of epoxy polyurethane resin, 13 parts of absolute ethyl alcohol, 8 parts of dispersing agent, 15 parts of polytetrafluoroethylene, 10 parts of alumina, 10 parts of silicon carbide, 12 parts of obsidian, 12 parts of metal platinum and 10 parts of carbonate.

5. A solar heat absorbing paint with an extended lifetime according to any one of claims 1-4, wherein: the dispersing agent is one of sodium dodecyl sulfate and polyethylene glycol or polyvinylpyrrolidone.

6. A solar heat absorbing paint with an extended lifetime according to any one of claims 1-4, wherein: the adhesive adopts silane coupling agent.

7. A solar heat absorbing paint with an extended lifetime according to any one of claims 1-4, wherein: the graphene is a two-dimensional carbon nanomaterial which is formed by carbon atoms in sp2 hybridized orbitals to form a hexagonal honeycomb lattice.

8. A method for preparing a solar heat absorbing paint capable of prolonging the service life according to any one of claims 1 to 4, wherein the method comprises the following steps: the method specifically comprises the following steps:

s2, placing the nano-composite powder, the ferric oxide, the carbon black, the polytetrafluoroethylene and the epoxy polyurethane resin into a ball mill, grinding for 30-40min at the rotating speed of 300-400r/min to obtain a first mixture after grinding, and taking out the ground product for later use;

s3, putting deionized water, alumina, silicon carbide, obsidian, metal platinum and carbonate into a high-speed stirrer, crushing for 50-60min at the rotating speed of 500-600r/min, putting into a muffle furnace after crushing and mixing uniformly, then sequentially adding a dispersing agent, a bonding agent and a curing agent, standing at the high temperature of 600-800 ℃, and naturally cooling to normal temperature after heating to obtain a second mixture;