CN111423814A

CN111423814A - Waterproof temperature-control thermal radiation coating and preparation method thereof

Info

Publication number: CN111423814A
Application number: CN202010337554.6A
Authority: CN
Inventors: 潘伟强; 唐波
Original assignee: Xiongyi Energy Technology Jiangsu Co ltd
Current assignee: Xiongyi Energy Technology Jiangsu Co ltd
Priority date: 2020-04-26
Filing date: 2020-04-26
Publication date: 2020-07-17

Abstract

The invention relates to a waterproof temperature-control thermal radiation coating which comprises 10-20 parts of deionized water, 15-20 parts of film-forming resin, 5-10 parts of pigment and filler, 2 parts of auxiliary agent, 10-40 parts of fullerene carbon fiber slurry and 15-20 parts of phase-change microcapsule slurry, and discloses a preparation method of the functional coating. The waterproof temperature-control heat radiation coating of the invention: the working voltage is 6-12V, the operation is safe, and the heating power reaches 500Wm^‑2(ii) a The normal work radiates infrared rays with the wavelength range of 8-15 microns outwards, and the physiotherapy effect is good; the heating efficiency is as high as 99.5%, and the coating has the heat storage function and is not used at ordinary timesThe constant temperature of the wall body within a certain time can be realized when the power is on; the coating has excellent waterproof and anticorrosive performance, can be widely used for floor heating, heating walls, decorative curtains and the like, and has the characteristics of strong adhesive force, no cracking and falling after long-term use, long service life and the like.

Description

Waterproof temperature-control thermal radiation coating and preparation method thereof

Technical Field

The invention relates to a waterproof temperature-control thermal radiation coating and a preparation method thereof, belonging to the field of functional coatings.

Background

Phase change microcapsules have received attention from scientists and engineers of various countries in recent years for their outstanding performance and broad application fields. The microcapsule technology is also called as microencapsulation, and is a technology for forming micro-particles by coating liquid, solid or gas with fluidity, sensitivity and volatility with one or more film-forming materials. The prepared microcapsule is a microcapsule, the particle size of the microcapsule is 1-1000 pum, and the microcapsule can be divided into a large capsule, a microcapsule and a nano capsule according to the different particle sizes. The material coated inside the microcapsule is called a core material, is composed of one or more materials, and can be single-core or multi-core. The shape of the microcapsule is generally determined by the physical properties of the core material, when the core material is solid, the shape of the microcapsule is generally irregular, or similar to the shape of coated solid particles, or irregularly contracted in the phase change process to form granules, grains, cowpea-shaped or other amorphous shapes and the like; when the core material is a liquid or gas, the microcapsules are generally spherical in shape. The microcapsule technology has been mature after decades of development and is widely applied to the fields of textile, medicine, pigment, spice, cosmetics, pesticide, military affairs and the like. The microcapsule technology has many advantages, such as effectively preventing the core material from being damaged by external environmental factors, increasing the contact area of the core material and the acted substance, reducing the diffusion or evaporation of the core material to the environment, improving the stability and durability of the core material, effectively controlling the release of the core material, covering the peculiar smell of the core material, changing the physical and chemical properties of the core material, being convenient for storage and transportation, and the like. While the main application direction of the microcapsules is in the coating material.

Recently, a heating coating is popular internationally, can directly convert electric energy into heat energy in a heat radiation mode, and has the advantages of small pollution, high efficiency, low one-time investment and the like. However, the products on the market generally have some defects, such as weak adhesion, easy detachment and local burning after a period of use; the conductive filler is easily oxidized to cause cracking of the coating. However, winter heating is a huge market, and it will be a long-term demand for conductive heating coatings with high performance, low cost and long service life, and is also a trend in the future. Although some progress is made in the current heat-generating paint and phase-change microcapsule coating, the practical use requirements of people are still far from being met, and particularly, the paint with two functions is lacked.

Disclosure of Invention

In order to overcome the defects of the performance of the existing related coating products, the invention provides a waterproof temperature-control thermal radiation coating and a preparation method thereof, and particularly provides the waterproof temperature-control thermal radiation coating which is synthesized by taking fullerene carbon fiber slurry and phase-change microcapsule slurry as the basis and combining functional pigments and fillers and organic silicon-inorganic silicon emulsion raw materials and a formula thereof. The coating has obvious effect, the working voltage is 6-12V, the operation is safe, and the heating power reaches 500Wm^-2(ii) a The normal work radiates infrared ray with wavelength range of 8-15 micrometers (called as light of human body) outwards, and has good physiotherapy effect; the heating efficiency is as high as 99.5%, the coating has a heat storage function, and the constant temperature (27 ℃) of the wall body within a certain time can be realized when the coating is not electrified at ordinary times; the waterproof and anticorrosive paint has excellent waterproof and anticorrosive performance, can play the roles of a waterproof layer, a thermal radiation heat supply layer and a constant temperature layer, can be widely used for floor heating, heating walls, decorative curtains and the like, and has the characteristics of strong adhesive force, no cracking and falling after long-term use, long service life and the like. In addition, the functional coating is water-based coating, does not contain heavy metal, is nontoxic and environment-friendly, and is friendly to human body and environment.

The technical scheme adopted by the invention for solving the technical problems is as follows: a waterproof temperature-control heat radiation coating is characterized in that: the composite material comprises the following raw materials in parts by weight: the phase-change microcapsule slurry comprises 10-20 parts of deionized water, 15-20 parts of film-forming resin, 5-10 parts of pigment and filler, 2 parts of auxiliary agent, 10-40 parts of fullerene carbon fiber slurry and 15-20 parts of phase-change microcapsule slurry.

Further, it is characterized in that: the film-forming resin is organic silicon-inorganic silicon composite emulsion, wherein the content of organic silicon resin is 20-25%, the content of inorganic silicon resin is 10-25%, the solid content of the emulsion is 40%, and the glass transition temperature is 0 ℃. The theory of adopting the organic silicon-inorganic silicon emulsion is that the dual-silicon resin has good adhesiveness, high temperature resistance, weather resistance and ductility, and can improve the adhesive force, the high temperature resistance, the crack resistance and the service life of the coating at the same time. This is because the Si-O-Si bond contained therein has high bonding energy and high stability, and improves the stability of the internal structure of the system under high temperature conditions. In addition, the organic silicon-inorganic silicon hybrid film takes Si-O bond as a main chain, and simultaneously has various side groups, so that the performance is complementary and the advantages are made up for, the defects of a single material (such as the defects of weak strength of organic silicon, poor fire resistance, large brittleness of inorganic silicon, difficult forming and the like) are greatly overcome, the new performance which is not possessed by the single material is obtained, and the advantages of organic silicon and inorganic silicon are achieved, wherein the organic phase and the inorganic phase are silicon materials, and the all-silicon system enables the two phases to have better compatibility, so that the organic silicon-inorganic silicon hybrid material has more excellent comprehensive performance, and can obtain better effects of corrosion, high temperature resistance and the like. In addition, by the optimization, better adhesive force is obtained, and separation and local burning easily caused after a period of use are avoided; the conductive filler is easily oxidized to cause cracking of the coating.

Further, it is characterized in that: the total weight of the fullerene carbon fiber slurry is 100%, the fullerene accounts for 2%, the carbon fiber in the slurry accounts for 20-30%, the xylene accounts for 66-76%, the defoaming agent accounts for 1%, and the dispersing agent accounts for 1%. The preparation process comprises the steps of adding the defoaming agent and the dispersing agent into dimethylbenzene, stirring for 30 minutes, then slowly adding the fullerene and the carbon fiber, and continuously stirring for 1 hour to prepare the fullerene carbon fiber slurry. The length of the carbon fiber is 300-1500um, the diameter is 15-40um, and the length-diameter ratio is 9-100.

Further, it is characterized in that: the total weight of the phase-change microcapsule slurry is calculated by 100%, wherein the content of the phase-change microcapsule is 60%, the content of deionized water is 38%, the content of a defoaming agent is 1%, and the content of a dispersing agent is 1%. The preparation process comprises the steps of adding the defoaming agent and the dispersing agent into deionized water, then adding the phase-change microcapsule and continuously stirring for 30 minutes to obtain the phase-change microcapsule slurry. Wherein the phase-change microcapsule is a silicon dioxide shell-octadecane core, which is a purchased commercial product. The theoretical basis for using fullerene carbon fibers as a main heating functional raw material is that the hollow space structure of fullerene provides a premise for uniform emission of infrared rays, and the thermal, mechanical and electrical properties of carbon fibers are close to those of carbon nanotubes and graphene, but the price of the carbon fibers is much cheaper than that of the latter. The price of grounding gas is ensured while the high performance of the functional coating is ensured. The theoretical basis of the phase change microcapsule adopting the silicon dioxide shell-octadecane core is that the inorganic shell can effectively improve the fire resistance of the microcapsule, and the phase change temperature of octadecane is close to the comfortable temperature of a human body.

Further, it is characterized in that: the auxiliary agent comprises 50% of defoaming agent and dispersing agent, wherein the defoaming agent is tween, and the dispersing agent is sodium dodecyl benzene sulfonate.

Further, it is characterized in that: the pigment and filler include titanium dioxide, talcum powder and barium sulfate. The total weight of the pigment and the filler is calculated by 100 percent, 50 percent of titanium dioxide, 30 percent of talcum powder and 20 percent of barium sulfate.

Further, it is characterized in that: the sample preparation comprises the following steps: adding all pigments and fillers into deionized water, gradually increasing the stirring speed until 1000 rpm, stirring for 40 minutes, and adding an auxiliary agent to obtain a uniformly dispersed mixed solution; adding the fullerene carbon fiber slurry into the mixed solution, and stirring for 30 minutes; and adding the phase-change microcapsule slurry, reducing the stirring speed to 500 r/m, adding the film-forming resin, and stirring for 30 minutes to obtain the waterproof temperature-control heat-radiation coating.

The waterproof temperature-control thermal radiation coating can be sprayed by high-pressure spraying equipment, manually brushed or rolled. Experiments show that the synergistic effect can be realized by simultaneously adopting fullerene and carbon fiber. The spherical shape of the fullerene is combined with the carbon fiber to form a special space structure, thereby avoiding the agglomeration of the carbon fiber and the stacking of the fullerene, and improving the heating efficiency of the carbon fiber and the fullerene. Compared with the prior art, the invention has the beneficial effects that: (1) the working voltage is 6-12V, the operation is safe, and the heating power reaches 500Wm^-2(ii) a (2) The normal work radiates infrared ray with wavelength range of 8-15 micrometers (called as light of human body) outwards, and has good physiotherapy effect; (3) the heating efficiency is up to 99.5%, the coating has a heat storage function, and the wall can be kept at a constant temperature (0-27 ℃) for a certain time when the coating is not electrified at ordinary times; (4) the coating has excellent waterproof and anticorrosive performance, plays the roles of a waterproof layer, a thermal radiation heat supply layer and a constant temperature layer, can be widely used for floor heating, heating walls, decorative curtains and the like, has strong adhesive force, does not crack or fall off after long-term use, and has the advantages of strong adhesive forceLong service life and the like; (5) in addition, the functional coating is water-based coating, does not contain heavy metal, is nontoxic and environment-friendly, and is friendly to human body and environment.

Drawings

The invention is further described below with reference to the accompanying drawings.

FIG. 1 is a scanning electron micrograph of the carbon fiber used in the present invention (the length of the carbon fiber is 300-1500. mu.m, and the diameter is 1.5-4. mu.m).

Detailed Description

The invention will now be further illustrated by reference to specific examples, which are intended to be illustrative of the invention and are not intended to be a further limitation of the invention.

The organic silicon-inorganic silicon film-forming resin is purchased from Changzhou coronating nano material science and technology limited company (the solid content of the resin is 52 percent, wherein the ratio of organic silicon to inorganic silicon resin is 1:1.4), the fullerene and the carbon fiber are purchased from Jiangxi Kai Laiwei company, and the phase-change microcapsule is a silicon dioxide shell-octadecane core and is provided by a new energy material subject group of the institute of Petroleum engineering of the Changzhou university (the preparation method refers to the preparation of the aryl octadecane-SiO 2 core-shell structure phase-change microcapsule and the phase-change energy storage performance research [ D ]. Shanghai: China eastern university of science and technology) in gypsum, wherein the solid content is 65 percent.

Titanium dioxide was purchased from Shunhui chemical Co., Ltd, rutile type.

Example 1

1g of an antifoaming agent and 1g of a dispersant were added to 76g of xylene and stirred for 30 minutes, and then 2g of fullerene and 20g of carbon fiber were slowly added and stirring was continued for 1 hour to prepare fullerene carbon fiber slurry. Adding all pigments and fillers (50g of titanium dioxide, 30g of talcum powder and 20g of barium sulfate) into 480g of deionized water, gradually increasing the stirring speed until 1000 revolutions per minute, stirring for 40 minutes, and adding an auxiliary agent (10g of a dispersing agent and 10g of a defoaming agent) to obtain a uniformly dispersed mixed solution; adding 100g of fullerene carbon fiber slurry into the mixed solution, and stirring for 30 minutes; and adding 150g of phase-change microcapsule slurry, reducing the stirring speed to 500 r/m, adding 200g of film-forming resin, and stirring for 30 minutes to obtain the waterproof temperature-control heat-radiation coating.

Example 2

4g of a defoaming agent and 4g of a dispersing agent were added to 264g of xylene and stirred for 30 minutes, and then 8g of fullerene and 120g of carbon fiber were slowly added and stirring was continued for 1 hour to prepare fullerene carbon fiber slurry. Adding all pigments and fillers (25g of titanium dioxide, 15g of talcum powder and 15g of barium sulfate) into 180g of deionized water, gradually increasing the stirring speed until 1000 revolutions per minute, stirring for 40 minutes, and adding an auxiliary agent (10g of a dispersing agent and 10g of a defoaming agent) to obtain a uniformly dispersed mixed solution; adding 400g of fullerene carbon fiber slurry into the mixed solution, and stirring for 30 minutes; and then 200g of phase-change microcapsule slurry is added, the stirring speed is reduced to 500 r/m, 150g of film-forming resin is added, and the mixture is stirred for 30 minutes, so that the waterproof temperature-control thermal radiation coating is obtained.

Example 3

4g of a defoaming agent and 4g of a dispersing agent were added to 264g of xylene and stirred for 30 minutes, and then 8g of fullerene and 120g of carbon fiber were slowly added and stirring was continued for 1 hour to prepare fullerene carbon fiber slurry. Adding all pigments and fillers (25g of titanium dioxide, 15g of talcum powder and 15g of barium sulfate) into 280g of deionized water, gradually increasing the stirring speed until 1000 revolutions per minute, stirring for 40 minutes, and adding an auxiliary agent (10g of a dispersing agent and 10g of a defoaming agent) to obtain a uniformly dispersed mixed solution; adding 400g of fullerene carbon fiber slurry into the mixed solution, and stirring for 30 minutes; and adding 150g of phase-change microcapsule slurry, reducing the stirring speed to 500 r/m, adding 150g of film-forming resin, and stirring for 30 minutes to obtain the waterproof temperature-control heat-radiation coating.

Example 4

2g of an antifoaming agent and 2g of a dispersant were added to 152g of xylene and stirred for 30 minutes, and then 4g of fullerene and 40g of carbon fiber were slowly added and stirring was continued for 1 hour to prepare fullerene carbon fiber slurry. Adding all pigments and fillers (50g of titanium dioxide, 30g of talcum powder and 20g of barium sulfate) into 300g of deionized water, gradually increasing the stirring speed until 1000 revolutions per minute, stirring for 40 minutes, and adding an auxiliary agent (10g of a dispersing agent and 10g of a defoaming agent) to obtain a uniformly dispersed mixed solution; adding 200g of fullerene carbon fiber slurry into the mixed solution, and stirring for 30 minutes; and adding 200g of phase-change microcapsule slurry, reducing the stirring speed to 500 r/m, adding 200g of film-forming resin, and stirring for 30 minutes to obtain the waterproof temperature-control heat-radiation coating.

The performance test results of the waterproof temperature-control heat-radiation coating prepared in the above embodiment are shown in tables 1 to 7:

table 1 the results of the performance tests of the conductive exothermic paint prepared in the different examples are as follows:

sample (I)	Hemispherical emissivity
		Example 1	0.86
Example 2	0.91
		Example 3	0.93
Example 4	0.87

Table 2 correlation of temperature and wavelength of radiation at different temperatures for samples prepared in example 3

Temperature of	The strongest wavelength
		100℃	7.71um
200℃	6.22um
		300℃	5.16um
400℃	4.38um
		500℃	3.79um
600℃	3.42um
		700℃	2.98um

Table 3 viscosity and adhesion of samples prepared in different examples

TABLE 4 impact resistance of samples prepared in different examples

Sample (I)	Impact strength
		Example 1	≥50cm·Kg
Example 2	≥50cm·Kg
		Example 3	≥50cm·Kg
Example 4	≥50cm·Kg

Table 5 resistivity of samples prepared in different examples

Sample (I)	Resistivity of
		Example 1	～31Ω
Example 2	～20Ω
		Example 3	～18Ω
Example 4	～27Ω

TABLE 6 high and Low temperature cycling stability of samples prepared in different examples

Sample (I)	High and low temperature cycle test	Temperature range
			Example 1	By passing	Minus 50 ℃ to minus 500 DEG C
Example 2	By passing	Minus 50 ℃ to minus 500 DEG C
			Example 3	By passing	Minus 50 ℃ to minus 500 DEG C
Example 4	By passing	Minus 50 ℃ to minus 500 DEG C

TABLE 7 physicochemical Properties of the functional coatings prepared in the above examples

The table shows that the coating disclosed by the invention has excellent performances, completely meets the relevant national standards, and is energy-saving and environment-friendly.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A waterproof temperature-control heat radiation coating is characterized in that: the composite material comprises the following raw materials in parts by weight: the phase-change microcapsule slurry comprises 10-20 parts of deionized water, 15-20 parts of film-forming resin, 5-10 parts of pigment and filler, 2 parts of auxiliary agent, 10-40 parts of fullerene carbon fiber slurry and 15-20 parts of phase-change microcapsule slurry.

2. The waterproof temperature-control heat-radiation coating material as claimed in claim 1, which is characterized in that: the film-forming resin is organic silicon-inorganic silicon composite emulsion, wherein the content of organic silicon resin is 20 +/-5%, the content of inorganic silicon resin is 25 +/-3%, the solid content of the emulsion is 45 +/-5%, and the glass transition temperature is 0 +/-5 ℃.

3. The waterproof temperature-control heat-radiation coating material as claimed in claim 1, which is characterized in that: the total weight of the fullerene carbon fiber slurry is calculated by 100 percent, the fullerene accounts for 2 +/-1 percent, the carbon fiber accounts for 20-30 percent of the slurry, the defoaming agent accounts for 1 +/-0.3 percent, the dispersing agent accounts for 1 +/-0.5 percent, and the balance is dimethylbenzene; the preparation process comprises the steps of adding the defoaming agent and the dispersing agent into dimethylbenzene, stirring for 30 +/-10 minutes, then slowly adding the fullerene and the carbon fiber, and continuously stirring for 1 +/-0.5 hours to prepare the fullerene carbon fiber slurry. The length of the carbon fiber is 300-1500um, and the diameter is 1.5-4 um.

4. The waterproof temperature-control heat-radiation coating material as claimed in claim 3, which is characterized in that: the total weight of the phase-change microcapsule slurry is calculated by 100%, wherein the content of the phase-change microcapsule is 60 +/-5%, the content of deionized water is 38 +/-2%, the content of a defoaming agent is 1 +/-0.3%, and the content of a dispersing agent is 1 +/-0.2%; the preparation process comprises the steps of adding the defoaming agent and the dispersing agent into deionized water, then adding the phase-change microcapsule and continuously stirring for 30 +/-10 minutes to obtain phase-change microcapsule slurry, wherein the phase-change microcapsule is a silicon dioxide shell-octadecane core.

5. The waterproof temperature-control heat-radiation coating material as claimed in claim 3, which is characterized in that: the auxiliary agent comprises 50% of defoaming agent and dispersing agent, wherein the defoaming agent is tween, and the dispersing agent is sodium dodecyl benzene sulfonate.

6. The waterproof temperature-control heat-radiation coating material as claimed in claim 1, which is characterized in that: the pigment and filler comprises titanium dioxide, talcum powder and barium sulfate; the total weight of the pigment and filler is calculated by 100 percent, 50 plus or minus 5 percent of titanium dioxide, 30 plus or minus 3 percent of talcum powder and 20 plus or minus 2 percent of barium sulfate.

7. The waterproof temperature-control heat-radiation coating material of claim 1, which is characterized in that: the sample preparation comprises the following steps: adding all pigments and fillers into deionized water, gradually increasing the stirring speed until 1000 rpm, stirring for 40 minutes, and adding an auxiliary agent to obtain a uniformly dispersed mixed solution; adding the fullerene carbon fiber slurry into the mixed solution, and stirring for 30 minutes; and adding the phase-change microcapsule slurry, reducing the stirring speed to 500 r/m, adding the film-forming resin, and stirring for 30 minutes to obtain the waterproof temperature-control heat-radiation coating.