Application of phase change energy storage temperature control composition
A phase-change energy storage composition with paraffin/modified fly ash material and additives improves thermal stability and heat storage in building coatings, addressing leakage and separation issues, achieving efficient temperature regulation and energy savings.
Patent Information
- Application Number
- CN202411406312.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-02-16
- Publication Date
- 2024-12-06
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Existing phase change materials in building coatings suffer from poor thermal stability, heat storage and release performance, and issues like phase change material leakage and phase separation, which affect temperature regulation performance.
A phase-change energy storage temperature control composition comprising 30% paraffin/modified fly ash shaped phase change material, 5% kaolin, 45%-61% alkaline activator, 4% silane coupling agent, 0.15%-0.25% defoamer, 0.5%-0.7% dispersant, 0.1%-0.2% film-forming aid, and 0.05%-0.15% non-ionic wetting agent, prepared by a vacuum impregnation process, to enhance thermal stability and heat storage performance.
The composition results in a coating with good film-forming properties, smooth surface, and improved thermal stability, with a phase change temperature of 29.8°C, phase change latent heat of 3.56 J·g⁻¹, and specific heat of 50.08 kJ·kg⁻¹·K⁻¹, effectively delaying temperature changes and enhancing energy-saving potential in buildings.
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Figure CN119081554A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of temperature control coating preparation, in particular to the application of a phase change energy storage temperature control composition in the preparation of a temperature control coating and a method for preparing the temperature control coating. Background Art
[0002] Building energy consumption accounts for a large part of the total social energy consumption. In order to solve the problem of building energy consumption, people have turned their attention to phase change materials.
[0003] Phase change material is a thermal functional material that can absorb or release latent heat. Unlike thermal insulation wall materials, phase change materials are used in buildings for more than just thermal insulation. They can also participate in the storage and utilization of building thermal energy, allowing phase change materials to produce several times the insulation and heat preservation effects of the same amount of traditional insulation materials. At the same time, through the cycle of high-temperature heat absorption and low-temperature heat release, the frequency of indoor air temperature fluctuations is reduced, the temperature is kept close to the required temperature for a long period of time, human comfort is increased, and energy saving is achieved at the same time. This is in line with the current trend of buildings developing towards multi-story and lightweight structures, making the energy-saving effect of buildings more significant.
[0004] At present, the use of phase change materials in buildings is mainly concentrated in the field of interior wall coatings. By filling phase change materials with heat storage function into the coating, the phase change materials absorb and release heat to achieve the purpose of regulating indoor temperature. However, the temperature regulation and heat storage performance of existing phase change insulation coatings do not meet the requirements, and the phase change materials themselves have volume changes, which are prone to phase change material leakage, phase separation and other problems, thus affecting the temperature regulation performance of the phase change materials.
[0005] Chinese patent application number CN201811192669.X discloses a composite phase-change energy storage architectural coating, the raw materials in the formula are composed of 1-5% expanded perlite, 1-5% ionic liquid, 2-4% straight-chain fatty acid, 5-13% styrene-acrylic emulsion, 15-20% pure acrylic emulsion, 8-10% alkane, and 5-7% ethylene-propylene emulsion. However, the expanded perlite used in the coating is prone to precipitation after being made, which will make the coating surface rough; and its thermal stability and heat storage and release performance are poor.
[0006] Therefore, how to increase the energy storage and temperature control performance of the coating is a technical problem that technical personnel in this field urgently need to solve. Summary of the invention
[0007] In order to solve the above technical problems, the present invention provides an application of a phase change energy storage temperature control composition 。
[0008] To achieve the above object, the present invention is implemented according to the following technical solutions:
[0009] The embodiment of the present invention provides, on the one hand, the use of a phase-change energy storage temperature control composition in the preparation of a temperature control coating with good thermal stability, good temperature control effect and excellent heat storage performance; wherein the phase-change energy storage temperature control composition comprises the following components by mass fraction: 30% paraffin / modified fly ash shaped phase change material, 5% kaolin, 45%-61% alkaline activator, 4% silane coupling agent, 0.15%-0.25% defoamer, 0.5%-0.7% dispersant, Membrane aid 0.1%-0.2%; non-ionic wetting agent 0.05%-0.15%; the paraffin / modified fly ash shaped phase change material is a paraffin / modified fly ash shaped phase change material prepared by a vacuum impregnation process with paraffin as the phase change core material and modified fly ash treated by acid leaching as the encapsulation matrix; the alkaline activator is obtained by adding analytical pure NaOH to liquid sodium silicate with a modulus of 3.26 to adjust the modulus to 1.5, and sealing and standing for 24 hours.
[0010] In a preferred embodiment, the defoaming agent is a silicone defoaming agent.
[0011] In a preferred embodiment, the dispersant is a sodium salt dispersant.
[0012] In a preferred embodiment, the film-forming aid is alcohol ester dodecaned.
[0013] In a preferred embodiment, the nonionic wetting agent is PE100.
[0014] A second aspect of an embodiment of the present invention provides a method for preparing a phase-change energy storage temperature control coating, comprising the following steps:
[0015] Place paraffin / modified fly ash shaped phase change material, kaolin, and alkaline activator in a beaker, place the beaker in a constant temperature water bath at 60°C, use a six-link electric stirrer to stir at high speed for 20 minutes, then add silane coupling agent, defoaming agent, dispersant, film-forming aid, and non-ionic wetting agent in sequence, and continue stirring for 10 minutes to obtain a phase change energy storage temperature control coating.
[0016] Compared with the prior art, the present invention provides an application of a phase-change energy storage composition in the preparation of a phase-change energy storage temperature control coating. The coating prepared by the composition has good film-forming properties, a smooth surface, and no peeling or powdering. The phase change temperature of the energy storage temperature control coating is 29.8°C, and the phase change latent heat is 3.56 J·g -1 , specific heat is 50.08 kJ·kg -1 ·K -1, and has good thermal stability. The heat storage and release performance experiment shows that the temperature change can be delayed to a certain extent within the phase change temperature range, and the temperature control effect is obvious. Therefore, the phase change energy storage temperature control coating of the present invention has the potential to save energy in buildings. Therefore, the present invention applies the phase change energy storage composition to the coating, and compared with the prior art, it has achieved unexpected technical effects. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] 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, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.
[0018] Figure 1 The present invention is a flow chart of the preparation method of the phase-change energy storage temperature control coating.
[0019] Figure 2 The morphology diagrams of phase change energy storage temperature control coatings with different silane coupling agent contents: (a) 2% silane coupling agent; (b) 3% silane coupling agent; (c) 4% silane coupling agent.
[0020] Figure 3 The morphology of phase change energy storage temperature control coatings with different silane coupling agent contents after 60 days: (a) silane coupling agent; (b) 3% silane coupling agent; (c) 4% silane coupling agent.
[0021] Figure 4 The morphology diagrams of phase change energy storage temperature control coatings with different contents of paraffin / modified fly ash shaped phase change materials: (a) 30% paraffin / modified fly ash shaped phase change material; (b) 20% paraffin / modified fly ash shaped phase change material; (c) 10% paraffin / modified fly ash shaped phase change material.
[0022] Figure 5 These are the morphology diagrams of phase change energy storage and temperature control coatings with different contents of paraffin wax / modified fly ash shaped phase change materials after 60 days: (a) 30% paraffin wax / modified fly ash shaped phase change material; (b) 20% paraffin wax / modified fly ash shaped phase change material; (c) 10% paraffin wax / modified fly ash shaped phase change material.
[0023] Figure 6 This is the thermal conductivity diagram of phase change energy storage temperature control coating plates with different paraffin / modified fly ash shaped phase change material contents.
[0024] Figure 7 This is the DSC curve of phase change energy storage temperature control coating.
[0025] Figure 8 is the specific heat capacity of the phase change energy storage temperature control coating.
[0026] Fig. 9 This is the specific heat capacity fitting curve of phase change energy storage temperature control coating.
[0027] Fig.10 This is the TG curve of phase change energy storage temperature control coating.
[0028] Fig.11 This is the heat storage characteristic curve of phase change energy storage temperature control coating.
[0029] Fig.12 This is the heat release performance curve of phase change energy storage temperature control coating. DETAILED DESCRIPTION
[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0031] The raw materials and equipment used in the following examples are as follows:
[0032] Experimental materials: phase change paraffin, Shanghai Joule Wax Co., Ltd.; fly ash (Class F, Level I), a coal gangue power generation limited liability company in Liaoning Province, dried before use; citric acid, analytical grade, Tianjin Yongsheng Fine Chemical Co., Ltd.; calcined kaolin, Henan Hengyuan New Materials Co., Ltd.; liquid sodium silicate (modulus 3.26), Jiashan Youqiang Refractory Materials Co., Ltd., add analytical grade NaOH to adjust the modulus to 1.5, seal and let stand for 24 hours to obtain an alkaline activator; silane coupling agent, Dongwan Lvwei Plastic Products Co., Ltd.; silicone acrylic emulsion, Zhengzhou Yuzhu Biotechnology Co., Ltd.; defoaming agent, dispersant, film-forming aid, non-ionic wetting agent, Beijing Xiangshang Technology Co., Ltd.
[0033] (2) Experimental equipment: Electric constant temperature air drying oven, LG-50, Shanghai Huitai Instrument Manufacturing Co., Ltd.; electronic balance, YH-A, Huizhou Yingheng Electronic Technology Co., Ltd.; magnetic stirrer, 85-1, Jiangsu Jintan Ronghua Instrument Manufacturing Co., Ltd.; circulating water vacuum pump, SHZ-D (Ⅲ), Bangxi Instrument Technology (Shanghai) Co., Ltd.; electric constant temperature water bath, HH-2,
[0034] Shanghai Lichen Bangxi Instrument Technology Co., Ltd.; Ultrasonic oscillator, KQ-100DB, Kunshan Ultrasonic Instrument Co., Ltd.; Blue screen furnace temperature and pressure paperless recorder, KT500R, Hangzhou Meikong Automation Technology Co., Ltd.; Six-link electric mixer, JJ-6AB, Changzhou Jinchang Liangyou Instrument Co., Ltd.
[0035] Example 1
[0036] Reference Figure 1 , place 30% paraffin / modified fly ash shaped phase change material, 5% kaolin, and 45%-61% alkaline activator in a beaker, place the beaker in a constant temperature water bath at 60°C, use a six-link electric mixer to stir at high speed for 20 minutes, then add 2%, 3%, and 4% of silane coupling agent, 0.15%-0.25% of defoaming agent, 0.5%-0.7% of dispersant, 0.1%-0.2% of film-forming aid, and 0.05%-0.15% of non-ionic wetting agent respectively, and continue stirring for 10 minutes to obtain a phase change energy storage temperature control coating.
[0037] Figure 2 The invention is a phase change energy storage temperature control coating with 30% paraffin / modified fly ash shaped phase change material and 2%, 3% and 4% silane coupling agent contents respectively. Figure 3 This is a phase change energy storage temperature control coating sample after standing for 60 days. Figure 2 , Figure 3 It can be seen that when the silane coupling agent dosage is 2% and 3%, the samples are accompanied by peeling and powdering. As the proportion of silane coupling agent increases, the peeling and powdering of the sample surface gradually ease, indicating that the addition of silane coupling agent can effectively improve the peeling and powdering of phase change energy storage temperature control coatings. When the silane coupling agent dosage is 4%, the sample surface is smooth and sticky, so the silane coupling agent content of 4% is selected in the subsequent examples to prepare phase change energy storage temperature control coatings.
[0038] Example 2
[0039] Reference Figure 1 , 30%, 20%, and 10% of paraffin / modified fly ash shaped phase change material, 5%-25% kaolin, and 45%-61% alkaline activator are placed in a beaker respectively, and the beaker is placed in a constant temperature water bath at 60°C. A six-link electric stirrer is used to stir at high speed for 20 minutes, and then 4% of silane coupling agent, 0.15%-0.25% of defoaming agent, 0.5%-0.7% of dispersant, 0.1%-0.2% of film-forming aid, and 0.05%-0.15% of non-ionic wetting agent are added in sequence and stirring is continued for 10 minutes to obtain a phase change energy storage temperature control coating.
[0040] Figure 4 The phase change energy storage temperature control coating is composed of 4% silane coupling agent, 30%, 20% and 10% paraffin wax / modified fly ash shaped phase change materials respectively. Figure 5 This is a phase change energy storage temperature control coating sample after 60 days of static standing. Figure 4 Figure 5It can be seen that when the content of paraffin / modified fly ash shaped phase change material is 10%, the coating surface is unevenly distributed, which may be because the main filler of this formula is kaolin, which has low compatibility with water glass. However, when the content of paraffin / modified fly ash shaped phase change material is 20%-30%, the coating surface is smooth and sticky, which may be because the phase change material residual on the surface of the paraffin / modified fly ash shaped phase change material improves the compatibility between kaolin and water glass.
[0041] The thermal conductivity of the phase change energy storage temperature control coating prepared by the phase change material with different contents of paraffin wax / modified fly ash was tested by the steady-state method. Phase change coating samples with a diameter of 13 cm and a thickness of 0.5 cm were prepared. The shape, size and mass of the heat sink and phase change energy storage temperature control coating samples are shown in Table 1.
[0042] Table 1
[0043]
[0044] Apply thermal grease evenly on the sample to reduce the error, place the phase change coating sample between the upper and lower copper plates of the thermal conductivity tester, fix the copper plates and the phase change coating, put one end of the thermocouple into the small hole in the center of the upper and lower copper plates, and the other end into a 0°C ice-water mixture, turn on the power to allow the upper high-temperature copper plate to transfer heat to the lower copper plate through the phase change coating, observe the readings, record the corresponding voltage readings VT1 and VT2 after they stabilize, and convert them into temperatures T1 and T2, remove the phase change coating, continue heating, and stop heating when the temperature of the lower copper plate is higher than T210°C, cool naturally and record the VT1 and VT2 values.
[0045] Figure 6 is the thermal conductivity of sample 1-sample 3, given by Figure 6 It can be seen that as the content of paraffin wax / modified fly ash shaped phase change material increases, the thermal conductivity gradually decreases. This is mainly due to the increase in the content of paraffin wax / modified fly ash shaped phase change material and the decrease in the content of kaolin. The lower the thermal conductivity, the higher the thermal resistance and the better the thermal insulation performance. At the same time, the content of paraffin wax / modified fly ash shaped phase change material increases, the latent heat increases, and the temperature control effect is more obvious. Therefore, the subsequent examples select a paraffin wax / modified fly ash shaped phase change material content of 30% to prepare a phase change energy storage temperature control coating.
[0046] Example 3
[0047] Reference Figure 1, place 30% paraffin / modified fly ash shaped phase change material, 5% kaolin, and 45%-61% alkaline activator in a beaker, place the beaker in a constant temperature water bath at 60°C, use a six-link electric stirrer to stir at high speed for 20 minutes, then add 4% silane coupling agent, 0.15%-0.25% defoaming agent, 0.5%-0.7% dispersant, 0.1%-0.2% film-forming aid, 0.05%-0.15% non-ionic wetting agent in sequence, and continue stirring for 10 minutes to obtain a phase change energy storage temperature control coating.
[0048] The prepared energy storage temperature control coating was evenly applied on the cardboard using a wire rod applicator. After coating, the cardboard was placed in a 70°C oven to solidify into a film. After solidification, the film was coated again and placed in an oven to continue solidification. This was repeated several times to finally obtain a phase change coating with a film thickness of about 2 mm after solidification. The coating was allowed to stand for 60 days to observe its surface properties. The thermal properties of the energy storage temperature control coating were tested using a differential scanning calorimeter (DSC, SDT-Q600) with a temperature range of 0°C to 80°C, a heating rate of 2°C / min, and a static nitrogen atmosphere. The thermal stability of the energy storage temperature control coating was determined using thermogravimetric analysis (TG).
[0049] Figure 7 is the DSC curve of phase change energy storage temperature control coating, Figure 7 It can be seen that the phase change temperature of the phase change energy storage temperature control coating is 29.8℃, which is basically the same as the phase change temperature of the paraffin / modified fly ash shaped phase change material, and the phase change latent heat is 3.56J·g -1 , and paraffin / modified fly ash shaped phase change material (latent heat value is 41.32J·g -1 ) showed a larger attenuation compared with the previous one. On the one hand, the reason is that the content of paraffin / modified fly ash shaped phase change material in the phase change energy storage temperature control coating is relatively small, only 30% of the phase change coating. On the other hand, it may be caused by insufficient stirring during the preparation process of the phase change energy storage temperature control coating, resulting in uneven distribution. The content of shaped phase change material in the coating samples tested is relatively small.
[0050] In order to investigate the heat storage effect of phase change energy storage temperature control coating, it is necessary to estimate the heat storage capacity of phase change energy storage temperature control coating. The heat storage capacity of phase change energy storage temperature control coating consists of two parts, one is the latent heat of phase change, which is measured by DSC curve, and the other is its own sensible heat, which is obtained by specific heat curve. Figure 8 It can be seen that the curve of specific heat capacity changing with temperature is approximately a cubic curve.
[0051] In order to obtain the exact specific heat, the curve is fitted as follows Fig. 9 , the fitting formula is:
[0052] Cp(t)=8.23×10 -5 t 3-0.00677t 2 +0.19782t-0.40954;
[0053] Calculate the average value by integrating
[0054]
[0055] Where t1 = 10°C, t2 = 60°C;
[0056] It can be seen that after adding paraffin / modified fly ash shaped phase change material, the specific heat of the coating has been significantly increased, and the specific heat value is much larger than the latent heat of phase change, which is the main source of heat storage.
[0057] The thermal decomposition of the phase change energy storage temperature control coating was determined by thermogravimetric analysis (TG), such as Fig.10 As shown. It can be seen from the TG curve that the phase change energy storage temperature control coating begins to have obvious mass loss at 50°C, and the mass loss is 10% at 90°C, and the total mass loss is 33% at 200°C. The initial mass loss is caused by the thermal volatilization of excess paraffin attached to the surface of the modified fly ash. As the temperature continues to rise, the paraffin adsorbed in the pore structure of the modified fly ash will also undergo thermal decomposition. At the same time, the organic components and volatile components in the coating are also lost in the temperature range of 100°C-200°C. Thereafter, as the temperature increases, the weight loss rate begins to slow down, and the mass loss at 200°C-800°C is 12%. The phase change energy storage temperature control coating of the present invention is mainly used for interior wall surfaces, and the working environment temperature is maintained below 50°C. Therefore, there is no problem of thermal functional attenuation of the coating due to material mass loss, and it has good working thermal stability.
[0058] Heat storage and release performance test
[0059] The self-made temperature control performance test box is a hollow cube made of two polystyrene plastic plates with a thickness of 2 cm and a length, width and height of 30 cm. One is an experimental box with a 2 mm thick phase change coating, and the other is a blank box with a 2 mm coating of the paraffin wax / modified fly ash shaped phase change material. During the test, the temperature sensor is fixed in the box and sealed. The experimental box and the blank box are placed in a constant temperature drying box respectively. The drying box is turned on to heat it to 60 ° C and record the data. After the temperature is constant, the drying box is turned off to allow the experimental box and the blank box to cool naturally at room temperature and record the data. The experiment is completed after the temperature is constant. The heating curve is as follows: Fig.11 As shown, the exothermic curve is Fig.12As shown in the figure. 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 all rise in a step-like shape. When the temperature is less than 35°C, the temperature change slope of the experimental box is significantly smaller than that of the blank box, and the temperature hysteresis phenomenon is more obvious. When the temperature is higher than 35°C, the heating rate of the experimental box accelerates. The heating rate of the blank box remains almost unchanged. The time required for the temperature in the blank box and the experimental box to increase from 20°C to 35°C is 960s and 1800s respectively. It can be seen that the heating rate inside the experimental box is slow, and the thermal storage performance of the paraffin / fly ash-based shaped phase change material plays a role in heat insulation. The time required for the blank box and the experimental box to increase from 35°C to 42°C is 400s and 440s respectively. This is because the thermal conductivity of the phase change coating is smaller than that of the ordinary coating without the use of shaped phase change material. When the temperature decreases, the temperatures of the drying box, blank box and experimental box all decrease in a step-like manner. The cooling rate of the blank box remains almost unchanged, while the cooling rate of the experimental box decreases significantly after the temperature drops to 35°C. This is the result of the heat release of the paraffin / modified fly ash shaped phase change material.
[0060] From the test results of the above embodiments, it can be seen that:
[0061] (1) When the silane coupling agent content is 4%, the surface of the phase change energy storage temperature control coating sample is smooth and sticky; when the paraffin / modified fly ash shaped phase change material content is 30%, the coating surface is evenly distributed.
[0062] (2) The thermal conductivity of phase change energy storage temperature control coatings prepared with different contents of paraffin / modified fly ash shaped phase change materials was tested by the steady-state method. The results showed that the thermal conductivity gradually decreased with the increase of the content of paraffin / modified fly ash shaped phase change materials. The lower the thermal conductivity, the higher the thermal resistance and the better the thermal insulation performance. At the same time, as the content of paraffin / modified fly ash shaped phase change materials increased, the latent heat increased and the temperature control effect became more obvious.
[0063] (3) The phase change temperature of the phase change energy storage temperature control coating with a paraffin / modified fly ash shaped phase change material content of 30% is 29.8°C, and the phase change latent heat is 3.56 J·g -1 ; The specific heat of the phase change energy storage temperature control coating is 50.08 kJ·kg -1 ·K -1 The thermal decomposition of the phase change energy storage temperature control coating was measured by thermogravimetric analysis (TG). The phase change energy storage temperature control coating began to have obvious mass loss at 50°C, and the mass loss was 10% at 90°C. At 200°C, the total mass loss was 33%. After that, as the temperature increased, the weight loss rate began to slow down, and the mass loss was 12% at 200°C-800°C. Therefore, the phase change energy storage temperature control coating has good thermal stability when used in the interior walls of buildings.
[0064] (4) The heat storage and release effect of the phase change energy storage temperature control coating is obvious. The temperature change of the experimental box lags significantly behind that of the blank box. Within the phase change temperature range, it can delay the temperature change to a certain extent, and the temperature control effect is obvious.
[0065] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the embodiments can be referred to each other. The above description of the disclosed embodiments enables professionals and technicians in this field to implement or use the present invention. Various modifications to these embodiments will be obvious to professionals and technicians in this field, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown in this article, but will comply with the widest range consistent with the principles and novel features disclosed herein.
Claims
1. Application of phase-change energy storage temperature control composition in the preparation of temperature control coatings with good thermal stability, good temperature control effect and excellent heat storage performance; wherein, The phase-change energy storage temperature control composition comprises the following components in mass fraction: 30% paraffin / modified fly ash shaped phase-change material, 5% kaolin, 45%-61% alkaline activator, 4% silane coupling agent, 0.15%-0.25% defoamer, 0.5%-0.7% dispersant, 0.1%-0.2% film-forming aid; 0.05%-0.15% non-ionic wetting agent; the paraffin / modified fly ash shaped phase-change material is a paraffin / modified fly ash shaped phase-change material prepared by a vacuum impregnation process, with paraffin as the phase-change core material and modified fly ash treated by acid leaching as the encapsulation matrix; the alkaline activator is obtained by adding analytical pure NaOH to liquid sodium silicate with a modulus of 3.26 to adjust the modulus to 1.5, and sealing and standing for 24 hours.
2. The use according to claim 1, characterized in that: The defoamer is an organosilicon defoamer.
3. The use according to claim 1, characterized in that: The dispersant is a sodium salt dispersant.
4. The use according to claim 1, characterized in that: The film-forming aid is alcohol ester dodecahydrate.
5. The use according to claim 1, characterized in that: The nonionic wetting agent is PE100.
6. A method for preparing a phase-change energy storage temperature control coating, characterized in that: The following steps are involved: Place paraffin / modified fly ash shaped phase change material, kaolin, and alkaline activator in a beaker, place the beaker in a constant temperature water bath at 60°C, use a six-link electric stirrer to stir at high speed for 20 minutes, then add silane coupling agent, defoaming agent, dispersant, film-forming aid, and non-ionic wetting agent in sequence, and continue stirring for 10 minutes to obtain a phase change energy storage temperature control coating.