CN115975506A - Phase-change energy-storage temperature-control coating and preparation method thereof - Google Patents
Phase-change energy-storage temperature-control coating and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a phase-change energy-storage temperature-control coating and a preparation method thereof, wherein the phase-change energy-storage temperature-control coating is prepared from the following raw materials in percentage by weight: 35% of a mixture of paraffin/modified fly ash shape-stabilized phase-change material and kaolin, wherein the paraffin/modified fly ash shape-stabilized phase-change material accounts for 20% -30%, and the kaolin accounts for 5% -15%; 45 to 61 percent of alkaline activator; 4% of a silane coupling agent; 0.15 to 0.25 percent of defoaming agent; 0.5 to 0.7 percent of dispersant; 0.1 to 0.2 percent of film-forming additive; 0.05 to 0.15 percent of non-ionic wetting agent. Compared with the prior art, the phase-change energy-storage temperature-control coating has good film-forming property, smooth surface and no flaking and powder falling phenomena, the phase-change temperature of the energy-storage temperature-control coating is 25.3 ℃, and the latent heat of phase change is 3.56 J.g ‑1 Specific heat of 50.08 kJ/kg ‑1 ·K ‑1 And the thermal stability is good, and the experiment of the heat storage and release performance shows that the temperature change can be delayed to a certain degree within the phase transition temperature range, and the temperature control effect is obvious.Therefore, the phase change energy storage temperature control coating has the potential of saving energy in buildings.
Description
Technical Field
The invention relates to the technical field of building coatings, in particular to a phase-change energy-storage temperature-control coating and a preparation method thereof.
Background
Building energy consumption occupies a large part of the total social energy consumption, and people aim at phase change materials in order to solve the problem of building energy consumption.
The phase-change material is a thermal function material capable of absorbing or releasing latent heat, is different from a thermal insulation wall material, is applied to a building and not only can keep warm, but also can participate in storage and utilization of building heat energy, so that the phase-change material can generate heat insulation and heat preservation effects which are several times as good as those of an equivalent traditional thermal insulation material, meanwhile, the frequency of indoor air temperature fluctuation is reduced through circulation of high-temperature heat absorption and low-temperature heat release, the temperature is kept close to the required temperature in a longer period, the comfort level of a human body is increased, the purpose of energy conservation is achieved, the trend of the current building towards the direction of a multilayer and light structure is met, and the energy-saving effect of the building is more remarkable.
The phase-change material used in the prior building is mainly concentrated in the field of interior wall coating, and the phase-change material with the heat storage function is filled in the coating, so that the purpose of adjusting the indoor temperature is achieved through the absorption and release of the phase-change material. However, the temperature-regulating performance and the heat storage performance of the existing phase-change heat-insulating coating cannot meet the requirements, and the phase-change material has volume change, so that the problems of phase-change material leakage, phase separation and the like are easy to occur, and the temperature-regulating performance of the phase-change material is influenced.
Chinese patent application No. CN201811192669.X discloses a composite phase change energy storage building coating, which comprises the following raw materials in percentage by weight: 1-5% of expanded perlite, 1-5% of ionic liquid, 2-4% of straight chain fatty acid, 5-13% of styrene-acrylic emulsion, 15-20% of pure acrylic emulsion, 8-10% of alkane and 5-7% of ethylene-propylene emulsion. However, the expanded perlite is used, so that precipitation is easily generated after the paint is prepared, and the surface of the paint is not smooth; and its thermal stability and heat storage and release properties are not good.
Disclosure of Invention
In order to solve the technical problems, the invention provides a phase-change energy-storage temperature-control coating and a preparation method thereof.
In order to achieve the purpose, the invention is implemented according to the following technical scheme:
the first purpose of the invention is to provide a phase-change energy-storage temperature-control coating, which is composed of the following raw materials in percentage by weight:
35% of a mixture of paraffin/modified fly ash shape-stabilized phase-change material and kaolin, wherein the paraffin/modified fly ash shape-stabilized phase-change material accounts for 20% -30%, and the kaolin accounts for 5% -15%;
45 to 61 percent of alkaline activator;
4% of a silane coupling agent;
0.15 to 0.25 percent of defoaming agent;
0.5 to 0.7 percent of dispersant;
0.1 to 0.2 percent of film-forming additive;
0.05-0.15% of nonionic wetting agent.
Furthermore, the paraffin/modified fly ash shaping phase change material is prepared by taking paraffin as a phase change core material and modified fly ash treated by an acid leaching method as a packaging substrate and adopting a vacuum impregnation process.
Further, the alkaline activator is obtained by adding analytically pure NaOH into liquid sodium silicate with the modulus of 3.26 to adjust the modulus to 1.5, sealing and standing for 24 hours.
Preferably, the defoamer is a silicone defoamer.
Preferably, the dispersant is a sodium salt dispersant.
Preferably, the coalescent is an alcohol ester twelve.
The second purpose of the invention is to provide a preparation method of the phase-change energy-storage temperature-control coating, which comprises the following steps:
placing the paraffin/modified fly ash shape-stabilized phase change material, kaolin and an alkaline activator in a beaker, placing the beaker in a constant-temperature water bath kettle at 60 ℃, stirring at a high speed for 20min by using a six-linkage electric stirrer, then sequentially adding a silane coupling agent, a defoaming agent, a dispersing agent, a film-forming auxiliary agent and a non-ionic wetting agent, and continuously stirring for 10min to obtain the phase-change energy-storage temperature-control coating.
Compared with the prior art, the phase-change energy-storage temperature-control coating has good film-forming property, smooth surface and no flaking and powder falling phenomena, the phase-change temperature of the energy-storage temperature-control coating is 29.8 ℃, and the latent heat of phase change is 3.56 J.g -1 Specific heat of 50.08 kJ/kg -1 ·K -1 And the thermal stability is good, and the experiment of the heat accumulation and release performance shows that the temperature change can be delayed to a certain degree within the phase change temperature range, and the temperature control effect is obvious. Therefore, the phase change energy storage temperature control coating has the potential of energy conservation in buildings.
Drawings
FIG. 1 is a flow chart of a preparation method of the phase-change energy-storage temperature-control coating of the invention.
FIG. 2 is a form diagram of phase change energy storage temperature control coating with different silane coupling agent contents: (a) 2% of a silane coupling agent; (b) 3% of a silane coupling agent; and (c) 4% of a silane coupling agent.
FIG. 3 is a form diagram of the phase change energy storage temperature control coating with different silane coupling agent contents after 60 d: (a) 2% of a silane coupling agent; (b) 3% of a silane coupling agent; and (c) 4% of silane coupling agent.
FIG. 4 is a shape chart of phase change energy storage temperature control coating with different paraffin/modified fly ash shape-stabilized phase change material contents: 30% of paraffin/modified fly ash shape-stabilized phase change material; (b) 20% paraffin/modified fly ash shape-stabilized phase change material; and (c) 10% of paraffin/modified fly ash shape-stabilized phase change material.
FIG. 5 is a shape diagram of the phase change energy storage temperature control coating with different paraffin/modified fly ash shaping phase change material contents after 60 d: 30% of paraffin/modified fly ash shape-stabilized phase change material; (b) 20% paraffin/modified fly ash shape-stabilized phase change material; and (c) 10% of paraffin/modified fly ash shape-stabilized phase change material.
FIG. 6 is a diagram of the thermal conductivity of the phase change energy storage temperature control coating plate with different paraffin/modified fly ash shape-stabilized phase change material contents.
FIG. 7 is a DSC curve of the phase change energy storage temperature control coating.
FIG. 8 is the specific heat capacity of the phase change energy storage temperature control coating.
FIG. 9 is a fitted curve of the specific heat capacity of the phase change energy storage temperature control coating.
FIG. 10 is a TG curve of a phase change energy storage temperature control coating.
FIG. 11 is a heat storage characteristic curve of the phase-change energy-storage temperature-control coating.
FIG. 12 is the exothermic performance curve of the phase change energy storage temperature control coating.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. The specific embodiments described herein are merely illustrative of the invention and do not delimit the invention.
The following examples used the following raw materials and equipment:
experimental materials: phase change paraffin wax, shanghai Joule wax industries, inc.; fly ash (F class, I grade), a certain coal gangue power generation limited liability company in Liaoning province, and is dried before use; citric acid, analytically pure, tianjin Yongcheng Fine chemical Co., ltd; calcined kaolin, henan New materials, inc.; adding analytically pure NaOH to adjust the modulus to 1.5 by using liquid sodium silicate (modulus 3.26) and Kanjian Youkou refractory material Co., ltd, and sealing and standing for 24h to obtain an alkaline activator; silane coupling agent, lugwei plastic products ltd, eastern aster; silicone-acrylic emulsion, zhengzhou yuzhu biotechnology limited; defoaming agent, dispersant, film forming assistant, nonionic wetting agent, beijing elephant science and technology Limited.
(2) Experimental equipment: an electric heating constant temperature air blast drying oven, LG-50, shanghai Huitai Instrument manufacturing Co., ltd; electronic balance, YH-A, huizhou City Yingheng electronics technology, inc.; magnetic stirrer, 85-1, manufactured by nabobism instruments ltd, jintan city, jiangsu province; circulating water vacuum pumps, SHZ-D (III), instruments and technology (Shanghai) Inc., bancey; an electric heating constant temperature water bath, HH-2, shanghai Lichen instruments science and technology Limited; ultrasonic oscillator, KQ-100DB, ultrasonic instruments Inc. of Kunshan; temperature and pressure paperless recorder for blue screen furnace, KT500R, hangzhou American automation technology, inc.; six gang electric mixer, JJ-6AB, changzhou gold farm Liangyou Instrument Co., ltd.
Example 1
Referring to fig. 1, 30% of paraffin/modified fly ash shape-stabilized phase change material, 5% of kaolin, 45% -61% of alkaline activator are placed in a beaker, the beaker is placed in a constant-temperature water bath kettle at 60 ℃, a six-unit electric stirrer is used for high-speed stirring for 20min, then 2%, 3%, 4% of silane coupling agent, 0.15% -0.25% of defoaming agent, 0.5% -0.7% of dispersing agent, 0.1% -0.2% of film forming additive and 0.05% -0.15% of nonionic wetting agent are respectively added, and the stirring is continued for 10min to obtain the phase change energy storage temperature control coating.
FIG. 2 shows a phase change energy storage and temperature control coating with paraffin/modified fly ash shape-stabilized phase change material of 30% and silane coupling agent content of 2%, 3% and 4%, respectively. FIG. 3 is a sample of the phase change energy storage temperature control coating after standing for 60 days. As can be seen from fig. 2 and 3, when the doping amounts of the silane coupling agent are 2% and 3%, the peeling and powder dropping phenomena of the sample are accompanied, and the peeling and powder dropping phenomena of the sample surface are gradually relieved along with the increase of the proportion of the silane coupling agent, which indicates that the peeling and powder dropping phenomena of the phase-change energy-storage temperature-control coating and the like can be effectively improved by adding the silane coupling agent. When the doping amount of the silane coupling agent is 4%, the surface of the sample is smooth and viscous, so that the phase-change energy-storage temperature-control coating is prepared by selecting the silane coupling agent with the content of 4% in the subsequent examples.
Example 2
Referring to fig. 1, respectively placing 30%,20% and 10% of paraffin/modified fly ash shaping phase change material, 5% -25% of kaolin, 45% -61% of alkaline activator in a beaker, placing the beaker in a constant-temperature water bath kettle at 60 ℃, stirring at high speed for 20min by using a six-linkage electric stirrer, and then sequentially adding 4% of silane coupling agent, 0.15% -0.25% of defoaming agent, 0.5% -0.7% of dispersing agent, 0.1% -0.2% of film forming assistant, and 0.05% -0.15% of nonionic wetting agent, and continuously stirring for 10min to obtain the phase change energy storage temperature control coating.
Fig. 4 shows a phase change energy storage temperature control coating with 4% of silane coupling agent, 30% of paraffin/modified fly ash shaping phase change material, 20% of paraffin/modified fly ash shaping phase change material and 10% of paraffin/modified fly ash shaping phase change material, and fig. 5 shows a phase change energy storage temperature control coating sample after standing for 60 d. As can be seen from fig. 4 and 5, when the paraffin/modified fly ash shape-changing material content is 10%, the distribution of the coating surface is not uniform, probably because the main filler of the formula is kaolin and the compatibility with the water glass is low, but when the paraffin/modified fly ash shape-changing material content is 20% -30%, the coating surface is smooth and sticky, probably because the residual phase-changing material on the surface of the paraffin/modified fly ash shape-changing material improves the compatibility between the kaolin and the water glass.
And testing the heat conductivity coefficient of the phase change energy storage temperature control coating prepared from the paraffin/modified fly ash shape-stabilized phase change materials with different contents by adopting a steady state method. A phase-change coating sample with a diameter of 13cm and a thickness of 0.5cm was prepared, and the shape, size and mass of the heat dissipation plate and the phase-change energy-storage temperature-control coating sample are shown in Table 1.
TABLE 1
Uniformly coating heat-conducting silicone grease on a sample to reduce errors, placing a phase-change coating sample between an upper copper plate and a lower copper plate of a heat conductivity coefficient tester, fixing the copper plates and the phase-change coating, placing one end of a thermocouple into a central small hole of the upper copper plate and the lower copper plate, placing the other end of the thermocouple into an ice-water mixture at 0 ℃, turning on a power supply to enable the upper-layer high-temperature copper plate to transfer heat to the lower-layer copper plate through the phase-change coating, observing readings, and recording corresponding voltage readings V after the readings are stabilized T1 、V T2 And is converted into a temperature T 1 、T 2 Removing the phase change coating, and continuing heating until the temperature of the lower copper plate is higher than T 2 Stopping heating at 10 deg.C, naturally cooling and recording V T1 、V T2 The value is obtained.
Fig. 6 shows the thermal conductivity of samples 1 to 3, and it can be seen from fig. 6 that the thermal conductivity gradually decreases with the increase of the content of the paraffin/modified fly ash shape-changing phase-changing material, which is mainly caused by the increase of the content of the paraffin/modified fly ash shape-changing phase-changing material and the decrease of the content of kaolin, the lower the thermal conductivity, the higher the thermal resistance, and the better the thermal insulation performance, and meanwhile, the content of the paraffin/modified fly ash shape-changing phase-changing material increases, the latent heat increases, and the temperature control effect is more obvious. Therefore, the paraffin/modified fly ash shaping phase-change material with the content of 30% is selected to prepare the phase-change energy-storage temperature-control coating in the subsequent embodiment.
Example 3
Referring to fig. 1, 30% of paraffin/modified fly ash shape-stabilized phase change material, 5% of kaolin, 45% -61% of alkaline activator are placed in a beaker, the beaker is placed in a constant-temperature water bath kettle at 60 ℃, a six-linkage electric stirrer is used for high-speed stirring for 20min, then 4% of silane coupling agent, 0.15% -0.25% of defoaming agent, 0.5% -0.7% of dispersing agent, 0.1% -0.2% of film forming additive and 0.05% -0.15% of nonionic wetting agent are sequentially added, and stirring is continued for 10min to obtain the phase-change energy-storage temperature-control coating.
Uniformly coating the prepared energy storage temperature control coating on a hard board by using a wire rod film coater, putting the hard board into a 70 ℃ oven after coating to be solidified into a film, coating the film again after solidification, putting the film into the oven to be continuously solidified for many times, finally obtaining a phase change coating with the film thickness of about 2mm after solidification, standing for 60 days, and observing the surface performance of the phase change coating; testing the thermal performance of the energy storage temperature control coating by adopting a differential scanning calorimeter (DSC, SDT-Q600), wherein the temperature measurement range is 0-80 ℃, the temperature rise rate is 2 ℃/min, and the temperature is in a static nitrogen atmosphere; measuring the thermal stability of the energy storage temperature control coating by adopting a thermogravimetric analysis (TG);
FIG. 7 is a DSC curve of the phase change energy storage temperature control coating, and it can be seen from FIG. 7 that the phase change temperature of the phase change energy storage temperature control coating is 29.8 ℃, which is substantially the same as the phase change temperature of the paraffin/modified fly ash shape-stabilized phase change material, and the latent heat of phase change is 3.56 J.g -1 And paraffin/modified fly ash shape-stabilized phase change material (potential heat value of 41.32 J.g) -1 ) Compared with the phase-change energy-storage temperature-control coating, the phase-change energy-storage temperature-control coating has larger attenuation due to the fact that the content of the paraffin/modified fly ash shape-stabilized phase-change material in the phase-change energy-storage temperature-control coating is less and is only 30% of that of the phase-change coating, and the content of the shape-stabilized phase-change material in a coating sample subjected to sampling test is less due to the fact that the distribution is not uniform due to insufficient stirring in the preparation process of the phase-change energy-storage temperature-control coating.
In order to examine the heat storage effect of the phase-change energy-storage temperature-control coating, the heat storage capacity of the phase-change energy-storage temperature-control coating must be estimated. The heat storage capacity of the phase-change energy-storage temperature-control coating is composed of two parts, one part is phase-change latent heat which is measured by a DSC curve, and the other part is self sensible heat which is obtained by a specific heat curve. As can be seen from FIG. 8, the curve of the specific heat capacity with temperature is approximated to a cubic curve, and in order to obtain the exact specific heat, the curve is fitted as shown in FIG. 9, and the fitting formula is:
Cp(t)＝8.23×10 -5 t 3 -0.00677t 2 +0.19782t-0.40954；
calculating the average value thereof by integration
Wherein t is 1 ＝10℃，t 2 ＝60℃；
To obtain
Therefore, after the paraffin/modified fly ash shape-stabilized phase change material is added, the specific heat of the coating is obviously increased, and the specific heat value is far greater than the latent heat of phase change, so that the heat storage is a main source.
The thermal decomposition measurement of the phase change energy storage temperature control coating was performed by thermogravimetric analysis (TG) as shown in fig. 10. As can be seen from the TG curve, the phase-change energy-storage temperature-control coating has obvious mass loss at 50 ℃, when the temperature is 90 ℃, the mass loss is 10%, when the temperature is 200 ℃, the total mass loss is 33%, the initial mass loss is caused by the thermal volatilization of redundant paraffin attached to the surface of the modified fly ash, the paraffin adsorbed in the pore structure of the modified fly ash can be thermally decomposed along with the continuous increase of the temperature, and meanwhile, the organic components and volatile components in the coating also generate loss in the temperature range of 100-200 ℃. Thereafter, as the temperature rises, the rate of weight loss begins to slow, with a mass loss of 12% at 200-800 ℃. The phase-change energy-storage temperature-control coating is mainly used on the surface of an inner wall, and the temperature of the working environment is maintained below 50 ℃, so that the problem of thermal function attenuation of the coating caused by material quality loss does not exist, and the phase-change energy-storage temperature-control coating has good working thermal stability.
Test of Heat and radiation Properties
A self-made temperature control performance test box is a hollow cube made of two polystyrene plastic plates, the thickness of each plate is 2cm, the length, the width and the height of each plate are 30cm, one plate is an experiment box and is coated with a phase change coating with the thickness of 2mm, the other plate is a blank box and is coated with a coating which is not doped with paraffin/modified fly ash shaping phase change materials, the temperature sensor is fixed and sealed in the box during testing, the experiment box and the blank box are respectively placed in a constant-temperature drying box, the drying box is opened to enable the temperature to rise to 60 ℃, data is recorded, the drying box is closed after the temperature is constant, the experiment box and the blank box are naturally cooled at room temperature, the data is recorded, and the experiment is completed after the temperature is constant. The temperature rise curve is shown in FIG. 11, and the heat release curve is shown in FIG. 12. As can be seen from the figure, when the temperature rises, the temperature of the drying box, the temperature of the blank box and the temperature of the experimental box are all in a rising ladder shape, wherein when the temperature is lower than 35 ℃, the temperature change slope of the experimental box is obviously lower than that of the blank box, the temperature hysteresis phenomenon is obvious, and when the temperature is higher than 35 ℃, the temperature rise rate of the experimental box is accelerated. The heating rate of the blank box is almost kept unchanged, the time required for the temperature in the blank box and the experimental box to rise from 20 ℃ to 35 ℃ is 960s and 1800s respectively, and the slow heating rate in the experimental box can be seen, and the heat storage performance of the paraffin/fly ash-based shaping phase-change material plays a heat insulation role. The temperature is increased from 35 ℃ to 42 ℃, and the time required by the blank box and the experimental box is 400s and 440s respectively, because the thermal conductivity of the phase change coating is smaller than that of the common coating without using the shape-stabilized phase change material. When the temperature is reduced, the temperatures of the drying box, the blank box and the experimental box are all in a descending stair shape, the cooling rate of the blank box is almost kept unchanged, and the cooling rate of the experimental box is obviously reduced after the temperature is reduced to 35 ℃, so that the paraffin/modified fly ash shaping phase change material releases heat.
From the test results of the above examples, it can be seen that:
(1) When the content of the silane coupling agent is 4%, the surface of the phase-change energy-storage temperature-control coating sample is smooth and sticky; when the content of the paraffin/modified fly ash shape-stabilized phase change material is 30%, the surface of the coating is uniformly distributed.
(2) The heat conductivity coefficient of the phase change energy storage temperature control coating prepared from the paraffin/modified fly ash shape-stabilized phase change materials with different contents is tested by adopting a steady state method, and the result shows that the heat conductivity coefficient is gradually reduced along with the increase of the content of the paraffin/modified fly ash shape-stabilized phase change materials, the lower the heat conductivity coefficient is, the higher the heat resistance is, the better the heat insulation performance is, and meanwhile, the content of the paraffin/modified fly ash shape-stabilized phase change materials is increased, the latent heat is increased, and the temperature control effect is more obvious.
(3) The phase-change energy-storage temperature-control coating with the paraffin/modified fly ash shape-stabilized phase-change material content of 30 percent has the phase-change temperature of 29.8 ℃ and the phase-change latent heat of 3.56 J.g -1 (ii) a The specific heat of the phase change energy storage temperature control coating is 50.08 kJ.kg through specific heat curve fitting -1 ·K -1 . The phase change energy storage temperature control coating is subjected to thermal decomposition measurement by thermogravimetric analysis (TG), the phase change energy storage temperature control coating has obvious mass loss at 50 ℃, the mass loss is 10% at 90 ℃, the total mass loss is 33% at 200 ℃, the weight loss rate begins to slow along with the rise of temperature, and the mass loss is 12% at 200-800 ℃, so that the phase change energy storage temperature control coating has good thermal stability when being used in the interior wall of a building.
(4) The phase-change energy storage temperature control coating has obvious heat storage and release effects, the temperature change of the experimental box is obviously lagged behind that of a blank box, the temperature change can be delayed to a certain degree within the phase-change temperature range, and the temperature control effect is obvious.
The technical solution of the present invention is not limited to the limitations of the above specific embodiments, and all technical modifications made according to the technical solution of the present invention fall within the protection scope of the present invention.
Claims (8)
1. A phase-change energy-storage temperature-control coating is characterized in that: the phase change energy storage temperature control coating is composed of the following raw materials in percentage by weight:
35% of a mixture of paraffin/modified fly ash shape-stabilized phase-change material and kaolin, wherein the paraffin/modified fly ash shape-stabilized phase-change material accounts for 20% -30%, and the kaolin accounts for 5% -15%;
45 to 61 percent of alkaline activator;
4% of a silane coupling agent;
0.15 to 0.25 percent of defoaming agent;
0.5 to 0.7 percent of dispersant;
0.1 to 0.2 percent of film-forming additive;
0.05 to 0.15 percent of non-ionic wetting agent.
2. The phase-change energy-storage temperature-control coating according to claim 1, characterized in that: the paraffin/modified fly ash shape-stabilized phase change material is prepared by taking paraffin as a phase change core material and modified fly ash treated by an acid leaching method as a packaging substrate and adopting a vacuum impregnation process.
3. The phase-change energy-storage temperature-control coating according to claim 1, characterized in that: the alkaline activator is prepared by adding analytically pure NaOH into liquid sodium silicate with the modulus of 3.26 to adjust the modulus to 1.5, sealing and standing for 24 hours.
4. The phase change energy storage temperature control coating according to claim 1, characterized in that: the defoaming agent is an organic silicon defoaming agent.
5. The phase change energy storage temperature control coating according to claim 1, characterized in that: the dispersant is a sodium salt dispersant.
6. The phase-change energy-storage temperature-control coating according to claim 1, characterized in that: the film-forming aid is alcohol ester twelve.
7. The phase-change energy-storage temperature-control coating according to claim 1, characterized in that: the non-ionic wetting agent is PE100.
8. The preparation method of the phase-change energy-storage temperature-control coating according to claim 1, characterized by comprising the following steps:
placing the paraffin/modified fly ash shape-stabilized phase change material, kaolin and an alkaline activator in a beaker, placing the beaker in a constant-temperature water bath kettle at 60 ℃, stirring at a high speed for 20min by using a six-linkage electric stirrer, then sequentially adding a silane coupling agent, a defoaming agent, a dispersing agent, a film-forming auxiliary agent and a non-ionic wetting agent, and continuously stirring for 10min to obtain the phase-change energy-storage temperature-control coating.
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