CN117447737A - Phase-change energy-storage flexible film based on green building materials and preparation method thereof - Google Patents
Phase-change energy-storage flexible film based on green building materials and preparation method thereof Download PDFInfo
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- 238000004146 energy storage Methods 0.000 title claims abstract description 141
- 239000004566 building material Substances 0.000 title claims abstract description 23
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 239000002202 Polyethylene glycol Substances 0.000 claims abstract description 13
- 229920001223 polyethylene glycol Polymers 0.000 claims abstract description 13
- 238000002156 mixing Methods 0.000 claims abstract description 11
- 238000001291 vacuum drying Methods 0.000 claims abstract description 11
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims description 42
- 238000003756 stirring Methods 0.000 claims description 42
- 239000010881 fly ash Substances 0.000 claims description 41
- 238000005303 weighing Methods 0.000 claims description 16
- 238000001035 drying Methods 0.000 claims description 15
- PTBDIHRZYDMNKB-UHFFFAOYSA-N 2,2-Bis(hydroxymethyl)propionic acid Chemical compound OCC(C)(CO)C(O)=O PTBDIHRZYDMNKB-UHFFFAOYSA-N 0.000 claims description 14
- KXBFLNPZHXDQLV-UHFFFAOYSA-N [cyclohexyl(diisocyanato)methyl]cyclohexane Chemical compound C1CCCCC1C(N=C=O)(N=C=O)C1CCCCC1 KXBFLNPZHXDQLV-UHFFFAOYSA-N 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
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- 239000003054 catalyst Substances 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 239000012153 distilled water Substances 0.000 claims description 12
- OMIGHNLMNHATMP-UHFFFAOYSA-N 2-hydroxyethyl prop-2-enoate Chemical compound OCCOC(=O)C=C OMIGHNLMNHATMP-UHFFFAOYSA-N 0.000 claims description 10
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 10
- 235000010489 acacia gum Nutrition 0.000 claims description 10
- 239000002041 carbon nanotube Substances 0.000 claims description 10
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 10
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- 229920005862 polyol Polymers 0.000 claims description 10
- 150000003077 polyols Chemical class 0.000 claims description 10
- 239000000843 powder Substances 0.000 claims description 10
- 229920002545 silicone oil Polymers 0.000 claims description 10
- 239000001785 acacia senegal l. willd gum Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 238000010992 reflux Methods 0.000 claims description 8
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical group CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 claims description 7
- 239000012975 dibutyltin dilaurate Substances 0.000 claims description 7
- 238000005485 electric heating Methods 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 2
- 239000002904 solvent Substances 0.000 claims description 2
- 229920000084 Gum arabic Polymers 0.000 claims 1
- 239000000205 acacia gum Substances 0.000 claims 1
- 238000005338 heat storage Methods 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 8
- 238000005265 energy consumption Methods 0.000 abstract description 7
- 239000012782 phase change material Substances 0.000 abstract description 5
- 238000004064 recycling Methods 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract description 2
- 238000005452 bending Methods 0.000 abstract description 2
- 230000007797 corrosion Effects 0.000 abstract description 2
- 238000005260 corrosion Methods 0.000 abstract description 2
- 238000009776 industrial production Methods 0.000 abstract description 2
- 231100000956 nontoxicity Toxicity 0.000 abstract description 2
- 229910052710 silicon Inorganic materials 0.000 abstract description 2
- 239000010703 silicon Substances 0.000 abstract description 2
- 230000008859 change Effects 0.000 description 15
- 230000000052 comparative effect Effects 0.000 description 13
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- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
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- 238000006386 neutralization reaction Methods 0.000 description 1
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Abstract
The invention discloses a phase-change energy-storage flexible film based on green building materials and a preparation method thereof, wherein a phase-change energy-storage carrier is added into a solution containing a phase-change energy-storage framework, the phase-change energy-storage solution is obtained by mixing, polyethylene glycol is added into the phase-change energy-storage solution, and the phase-change energy-storage flexible film is obtained by placing the solution into a vacuum drying oven, so that the problems of large energy waste in a heat energy form, low energy recycling efficiency and poor corrosion resistance and stability of the phase-change material in use are solved; the silicon element is successfully introduced into the phase-change energy storage skeleton molecule, so that the heat resistance of the wall material is improved, and the self-emulsifying capacity is utilized, so that the compactness is improved, the phase-change heat storage performance is also greatly improved, the flexible film has excellent foldable bending performance, good heat storage performance, simple preparation process, convenient operation, low product cost, less energy consumption, no toxicity and no pollution, and is easy to realize large-scale industrial production.
Description
Technical Field
The invention relates to the field of green building materials, in particular to a phase-change energy-storage flexible film based on a green building material and a preparation method thereof.
Background
In recent years, in the situation of increasing global energy consumption each year, carbon neutralization promise is added in more and more countries, in order to enable the energy consumption to reach the low carbon level, heat energy is one of the most commonly used energy sources, about 90% of energy loss in the world is mainly concentrated in heat conversion, transmission and storage because of the heat energy storage problem, heat energy is also often wasted in a plurality of products produced in industry, about 50% of energy consumption in the world exists in the form of heat energy, therefore, the heat storage is an effective method for solving the energy problem, the heat storage technology is a passive process for adjusting the stored heat energy of the phase change material according to the change of the ambient temperature, and the heat storage technology not only can effectively adjust the heat energy storage, but also can improve the recycling efficiency of the energy sources and reduce the waste of the energy sources;
at present, heat storage is widely applied, such as passive heat/cold buffering in the food industry, overheat protection in electronic products, indoor heat insulation and heat preservation in building materials, the thermal comfort level of a human body is always kept by utilizing the heat storage of phase-change materials to the fabric textiles, and the like, especially, the building energy consumption is more than 40% of the total energy consumption in China, so that energy conservation and safety are important problems faced by sustainable development of society, and the phase-change energy storage technology is taken as a novel green energy-saving building material, has obvious energy-saving effect and good heat stability, is a novel green material with great application prospect, and is an important technology for improving the energy utilization efficiency and protecting the environment, but has a plurality of fatal defects (such as corrosiveness, instability, supercooling, poor heat transfer performance and the like) particularly has poor heat transfer performance, so that the application effect is greatly reduced.
Disclosure of Invention
In order to overcome the technical problems, the invention aims to provide a phase-change energy-storage flexible film based on green building materials and a preparation method thereof:
(1) Adding a phase-change energy storage carrier into a solution containing a phase-change energy storage framework, mixing to obtain a phase-change energy storage solution, adding polyethylene glycol into the phase-change energy storage solution, and putting the solution into a vacuum drying oven to obtain the phase-change energy storage flexible film, so that the problems of waste of a large amount of energy sources in a heat energy form and low energy recycling efficiency are solved;
(2) Adding dicyclohexylmethane diisocyanate, hydroxyl-terminated silicone oil and polyether polyol into a four-neck flask provided with a stirring device and a reflux condenser, adding a catalyst to obtain an intermediate A, adding dimethylolpropionic acid into the four-neck flask where the intermediate A is positioned for reaction, adding hydroxyethyl acrylate for end sealing to obtain an intermediate B, adding triethylamine into the intermediate B, stirring, and adding distilled water to obtain a phase-change energy storage skeleton, thereby solving the problems of low molding rate and poor thermal stability of a phase-change material;
(3) The method comprises the steps of weighing fly ash by a culture dish, putting the fly ash into an electric heating constant temperature drying oven, drying to constant weight, obtaining dry fly ash, weighing the dry fly ash in a beaker, adding carbon nano tube powder, stirring, and dripping Arabic gum to obtain the phase change energy storage carrier, thereby solving the problems of poor corrosion resistance and poor stability of the phase change material in use.
The aim of the invention can be achieved by the following technical scheme:
the preparation method of the phase-change energy-storage flexible film based on the green building material comprises the following steps:
s1: adding a phase-change energy storage carrier into the solution containing the phase-change energy storage skeleton, and mixing to obtain a phase-change energy storage solution;
s2: adding polyethylene glycol into the phase-change energy storage solution, stirring, placing into a vacuum drying oven, setting the temperature of the oven body to be 60-80 ℃, the adsorption vacuum degree to be 0.06-0.08MPa, and the time length to be 4-8h, taking out, and cooling to room temperature to obtain the phase-change energy storage flexible film.
As a further scheme of the invention: the phase-change energy storage framework is prepared by the following steps:
s21: adding dicyclohexylmethane diisocyanate, hydroxyl-terminated silicone oil and polyether polyol into a four-neck flask provided with a stirring device and a reflux condenser, adding catalyst dibutyltin dilaurate, heating to 60-70 ℃ under the protection of nitrogen, and reacting for 3-5h to obtain an intermediate A;
the chemical reaction formula is as follows:
s22: adding dimethylolpropionic acid into a four-neck flask where the intermediate A is positioned, reacting for 2-3h, adding hydroxyethyl acrylate for end sealing, controlling the temperature to be 66-75 ℃, reacting for 3-5h, and cooling to 25-30 ℃ to obtain an intermediate B;
the chemical reaction formula is as follows:
s23: adding triethylamine into the intermediate B, stirring for 10-20min, adding distilled water, and stirring uniformly to obtain the phase-change energy storage skeleton.
The chemical reaction formula is as follows:
as a further scheme of the invention: the dosage ratio of dicyclohexylmethane diisocyanate, hydroxyl terminated silicone oil and polyether polyol in the step S21 is 1049.2g:2000g:204.2g, wherein the catalyst is dibutyl tin dilaurate, and the dosage ratio of the catalyst is 3% of the mass of dicyclohexylmethane diisocyanate.
As a further scheme of the invention: the ratio of the dimethylolpropionic acid in step S22 to the dicyclohexylmethane diisocyanate in step S21 was 134.1g:1049.2g, the dosage ratio of dimethylolpropionic acid to hydroxyethyl acrylate is 134.1g:232.2g.
As a further scheme of the invention: the dosage ratio of the triethylamine in the step S23 to the dimethylolpropionic acid in the step S22 was 202.4g:134.1g of triethylamine and distilled water, wherein the dosage ratio of the triethylamine to the distilled water is 202.4g:20mL.
As a further scheme of the invention: the phase-change energy storage carrier is prepared by the following steps:
s61: weighing fly ash by using a culture dish, putting the fly ash into an electric heating constant temperature drying oven at 100-110 ℃ for drying to constant weight, and opening a pore structure to evaporate moisture in pores of the fly ash to obtain dry fly ash;
s62: weighing dry fly ash in a beaker, adding carbon nano tube powder, stirring, dripping Arabic gum, controlling the dripping speed to be 1-2 drops/s, and stirring for 6-8h at 30-40 ℃ to obtain the phase change energy storage carrier.
As a further scheme of the invention: the dosage ratio of the dry fly ash to the carbon nano tube powder to the Arabic gum in the step S62 is 10g:5g:3g.
As a further scheme of the invention: the solution of the phase-change energy storage framework takes methyl pyrrolidone as a solvent, wherein the dosage ratio of the phase-change energy storage framework to the methyl pyrrolidone is 1g:50g, the dosage ratio of the phase-change energy storage solution to the polyethylene glycol is 20g:1g.
A preparation method of a phase-change energy storage flexible film based on green building materials comprises the following steps:
s1: adding a phase-change energy storage carrier into the solution containing the phase-change energy storage skeleton, and mixing to obtain a phase-change energy storage solution;
s2: adding polyethylene glycol into the phase-change energy storage solution, stirring, placing into a vacuum drying oven, setting the temperature of the oven body to be 60-80 ℃, the adsorption vacuum degree to be 0.06-0.08MPa, and the time length to be 4-8h, taking out, and cooling to room temperature to obtain the phase-change energy storage flexible film.
The invention has the beneficial effects that:
(1) According to the invention, the phase-change energy storage carrier is added into the solution containing the phase-change energy storage skeleton, the phase-change energy storage solution is obtained by mixing, the polyethylene glycol is added into the phase-change energy storage solution, and the phase-change energy storage flexible film is obtained by placing the phase-change energy storage solution into a vacuum drying oven, so that the flexible film has excellent foldable bending performance and good heat storage performance, can be widely applied to various energy storage fields, and has the advantages of simple preparation process, convenient operation, low product cost, less energy consumption, no toxicity, no pollution and easy realization of large-scale industrial production;
(2) Adding dicyclohexylmethane diisocyanate, hydroxyl-terminated silicone oil and polyether polyol into a four-neck flask provided with a stirring device and a reflux condenser, adding a catalyst to obtain an intermediate A, adding dimethylolpropionic acid into the four-neck flask where the intermediate A is positioned for reaction, adding hydroxyethyl acrylate for end sealing to obtain an intermediate B, adding triethylamine into the intermediate B, stirring and adding distilled water to obtain a phase-change energy storage skeleton, storing part of heat through a phase transformation process, then releasing energy under proper conditions, and obtaining a phase-change energy storage skeleton which has high energy storage density, small volume and easy design, wherein the large molecular chain has good designability, is an ideal wall material for energy storage, can achieve the aim of improving the toughness and mechanical strength of the wall material through compounding with a phase-change energy storage carrier, obtains more excellent heat resistance and compactness, has high phase-change energy storage, successfully introduces silicon element into molecules of the energy storage skeleton, improves the heat resistance of the wall material, simultaneously utilizes self-emulsifying capacity, improves the uniformity of particle size distribution, and thus the degree of compactness is greatly improved;
(3) The method comprises the steps of weighing fly ash by a culture dish, putting the fly ash into an electric heating constant temperature drying oven, drying to constant weight, obtaining dry fly ash, weighing the dry fly ash in a beaker, adding carbon nano tube powder, stirring, dropwise adding Arabic gum, obtaining a phase-change energy storage carrier, wherein the phase-change energy storage carrier inhibits the desorption process of the fly ash while delaying the temperature rise, and the low heat release process of the fly ash for adsorbing water molecules can help the phase-change energy storage carrier molecules to delay the reduction of indoor temperature when cooling, so that the temperature and the humidity are mutually promoted, the phase-change energy storage carrier can effectively regulate the temperature and humidity, when the temperature difference of the outside of the phase-change energy storage carrier is larger, the phase-change energy storage can reduce the indoor temperature fluctuation, maintain longer temperature time of a comfort zone, and the mechanical ventilation can obviously improve the heat storage efficiency of the energy storage wallboard under the ventilation condition, thereby achieving the purpose of improving the conversion efficiency of the phase-change energy storage.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1:
the embodiment is a phase-change energy-storage flexible film based on green building materials, and the preparation method of the phase-change energy-storage flexible film comprises the following steps:
s1: adding a phase-change energy storage carrier into the solution containing the phase-change energy storage skeleton, and mixing to obtain a phase-change energy storage solution;
s2: adding polyethylene glycol into the phase-change energy storage solution, stirring, placing into a vacuum drying oven, setting the temperature of the oven body to 60 ℃, the adsorption vacuum degree to 0.06MPa, and the duration to 4 hours, taking out, and cooling to room temperature to obtain the phase-change energy storage flexible film;
the phase-change energy storage framework is prepared by the following steps:
s21: 1049.2g of dicyclohexylmethane diisocyanate, 2000g of hydroxyl-terminated silicone oil and 204.2g of polyether polyol are added into a four-neck flask provided with a stirring device and a reflux condenser, a catalyst dibutyltin dilaurate is added, and the temperature is raised to 60 ℃ under the protection of nitrogen, and the reaction is carried out for 3 hours to obtain an intermediate A;
s22: adding 134.1g of dimethylolpropionic acid into a four-neck flask where the intermediate A is positioned, reacting for 2 hours, adding 232.2g of hydroxyethyl acrylate for end capping, controlling the temperature to 66 ℃, reacting for 3 hours, and cooling to 25 ℃ to obtain an intermediate B;
s23: adding 202.4g of triethylamine into the intermediate B, stirring for 10min, adding 20mL of distilled water, and stirring uniformly to obtain a phase-change energy storage framework;
the phase change energy storage carrier is prepared by the following steps:
s61: weighing fly ash by using a culture dish, putting the fly ash into an electrothermal constant-temperature drying oven at 100 ℃ for drying to constant weight, and opening a pore structure to evaporate moisture in pores of the fly ash to obtain dry fly ash;
s62: weighing 10g of dry fly ash in a beaker, adding 5g of carbon nano tube powder, stirring, dripping 3g of Arabic gum, controlling the dripping speed to be 1 drop/s, and stirring for 6 hours at 30 ℃ to obtain the phase-change energy storage carrier.
Example 2:
the embodiment is a phase-change energy-storage flexible film based on green building materials, and the preparation method of the phase-change energy-storage flexible film comprises the following steps:
s1: adding a phase-change energy storage carrier into the solution containing the phase-change energy storage skeleton, and mixing to obtain a phase-change energy storage solution;
s2: adding polyethylene glycol into the phase-change energy storage solution, stirring, placing into a vacuum drying oven, setting the temperature of the oven body to 60 ℃, the adsorption vacuum degree to 0.06MPa, and the duration to 4 hours, taking out, and cooling to room temperature to obtain the phase-change energy storage flexible film;
the phase-change energy storage framework is prepared by the following steps:
s21: 1049.2g of dicyclohexylmethane diisocyanate, 2000g of hydroxyl-terminated silicone oil and 204.2g of polyether polyol are added into a four-neck flask provided with a stirring device and a reflux condenser, a catalyst dibutyltin dilaurate is added, and the temperature is raised to 70 ℃ under the protection of nitrogen, and the reaction is carried out for 5 hours, so as to obtain an intermediate A;
s22: adding 134.1g of dimethylolpropionic acid into a four-neck flask where the intermediate A is positioned, reacting for 3 hours, adding 232.2g of hydroxyethyl acrylate for end capping, controlling the temperature to be 75 ℃, reacting for 5 hours, and cooling to 30 ℃ to obtain an intermediate B;
s23: adding 202.4g of triethylamine into the intermediate B, stirring for 10min, adding 20mL of distilled water, and stirring uniformly to obtain a phase-change energy storage framework;
the phase change energy storage carrier is prepared by the following steps:
s61: weighing fly ash by using a culture dish, putting the fly ash into an electrothermal constant-temperature drying oven at 100 ℃ for drying to constant weight, and opening a pore structure to evaporate moisture in pores of the fly ash to obtain dry fly ash;
s62: weighing 10g of dry fly ash in a beaker, adding 5g of carbon nano tube powder, stirring, dripping 3g of Arabic gum, controlling the dripping speed to be 1 drop/s, and stirring for 6 hours at 30 ℃ to obtain the phase-change energy storage carrier.
Example 3:
the embodiment is a phase-change energy-storage flexible film based on green building materials, and the preparation method of the phase-change energy-storage flexible film comprises the following steps:
s1: adding a phase-change energy storage carrier into the solution containing the phase-change energy storage skeleton, and mixing to obtain a phase-change energy storage solution;
s2: adding polyethylene glycol into the phase-change energy storage solution, stirring, placing into a vacuum drying oven, setting the temperature of the oven body to 80 ℃, the adsorption vacuum degree to 0.08MPa, and the duration to 8 hours, taking out, and cooling to room temperature to obtain the phase-change energy storage flexible film;
the phase-change energy storage framework is prepared by the following steps:
s21: 1049.2g of dicyclohexylmethane diisocyanate, 2000g of hydroxyl-terminated silicone oil and 204.2g of polyether polyol are added into a four-neck flask provided with a stirring device and a reflux condenser, a catalyst dibutyltin dilaurate is added, and the temperature is raised to 70 ℃ under the protection of nitrogen, and the reaction is carried out for 5 hours, so as to obtain an intermediate A;
s22: adding 134.1g of dimethylolpropionic acid into a four-neck flask where the intermediate A is positioned, reacting for 3 hours, adding 232.2g of hydroxyethyl acrylate for end capping, controlling the temperature to be 75 ℃, reacting for 5 hours, and cooling to 30 ℃ to obtain an intermediate B;
s23: adding 202.4g of triethylamine into the intermediate B, stirring for 20min, adding 20mL of distilled water, and stirring uniformly to obtain a phase-change energy storage framework;
the phase change energy storage carrier is prepared by the following steps:
s61: weighing fly ash by using a culture dish, putting the fly ash into an electric heating constant temperature drying oven at 110 ℃ for drying to constant weight, and opening a pore structure to evaporate moisture in pores of the fly ash to obtain dry fly ash;
s62: weighing 10g of dry fly ash in a beaker, adding 5g of carbon nano tube powder, stirring, dripping 3g of Arabic gum, controlling the dripping speed to be 1 drop/s, and stirring for 8 hours at 40 ℃ to obtain a phase-change energy storage carrier;
example 4:
the embodiment is a phase-change energy-storage flexible film based on green building materials, and the preparation method of the phase-change energy-storage flexible film comprises the following steps:
s1: adding a phase-change energy storage carrier into the solution containing the phase-change energy storage skeleton, and mixing to obtain a phase-change energy storage solution;
s2: adding polyethylene glycol into the phase-change energy storage solution, stirring, placing into a vacuum drying oven, setting the temperature of the oven body to 70 ℃, the adsorption vacuum degree to 0.07MPa, and the duration to 6 hours, taking out, and cooling to room temperature to obtain the phase-change energy storage flexible film;
the phase-change energy storage framework is prepared by the following steps:
s21: 1049.2g of dicyclohexylmethane diisocyanate, 2000g of hydroxyl-terminated silicone oil and 204.2g of polyether polyol are added into a four-neck flask provided with a stirring device and a reflux condenser, a catalyst dibutyltin dilaurate is added, and the temperature is raised to 60 ℃ under the protection of nitrogen, and the reaction is carried out for 4 hours, so as to obtain an intermediate A;
s22: adding 134.1g of dimethylolpropionic acid into a four-neck flask where the intermediate A is positioned, reacting for 2 hours, adding 232.2g of hydroxyethyl acrylate for end capping, controlling the temperature to be 75 ℃, reacting for 4 hours, and cooling to 30 ℃ to obtain an intermediate B;
s23: adding 202.4g of triethylamine into the intermediate B, stirring for 15min, adding 20mL of distilled water, and stirring uniformly to obtain a phase-change energy storage framework;
the phase change energy storage carrier is prepared by the following steps:
s61: weighing fly ash by using a culture dish, putting the fly ash into an electric heating constant temperature drying oven at 110 ℃ for drying to constant weight, and opening a pore structure to evaporate moisture in pores of the fly ash to obtain dry fly ash;
s62: weighing 10g of dry fly ash in a beaker, adding 5g of carbon nano tube powder, stirring, dripping 3g of Arabic gum, controlling the dripping speed to be 1 drop/s, and stirring for 8 hours at 30 ℃ to obtain the phase-change energy storage carrier.
Comparative example 1:
comparative example 1 differs from example 1 in that no phase change energy storage carrier was added,
comparative example 2:
comparative example 2 a commercially available flexible film was used.
Performance testing
The flexible films of examples 1-3 and comparative examples 1-2 were tested for simulated solar irradiation, time-temperature values were obtained for testing, and thermal conductivity was measured;
the test results are shown in the following table:
as is clear from the above table, the thermal conductivity of the examples reaches 1.01 to 1.03 W.m -1 ·K -1 Comparative example 2 without the addition of a phase change energy storage carrier has a thermal conductivity of 0.1 W.multidot.m -1 ·K -1 Comparative example 2, a commercially available flexible film, has a thermal conductivity of 0.3 W.m -1 ·K -1 The temperature of the example was 37-38deg.C when the simulated solar light was irradiated for 500s, the temperature of the comparative example 2 without the phase change energy storage carrier was 27 deg.C, the temperature of the commercially available flexible film was 36 deg.C, the temperature of the example was 58-59deg.C when the simulated solar light was irradiated for 1000s, the temperature of the comparative example 2 without the phase change energy storage carrier was 34 deg.C, the temperature of the commercially available flexible film was 48 deg.C, the temperature of the example was 64-65deg.C when the simulated solar light was irradiated for 1500s, the temperature of the comparative example 2 without the phase change energy storage carrier was 40 deg.C, the temperature of the example was 53 deg.C, the temperature of the comparative example 2 without the phase change energy storage carrier was 68-69 deg.C when the simulated solar light was irradiated for 2000s, the temperature of the comparative example 2 without the phase change energy storage carrier was 42 deg.C, the temperature of the commercially available flexible film was 55 deg.C, and the various data of the example were superior to the comparative example, indicating that the flexible film material prepared by the present invention has more excellent phase change energy storage ability.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is merely illustrative and explanatory of the invention, as various modifications and additions may be made to the particular embodiments described, or in a similar manner, by those skilled in the art, without departing from the scope of the invention or exceeding the scope of the invention as defined in the claims.
Claims (9)
1. The phase-change energy-storage flexible film based on the green building material is characterized in that the preparation method of the phase-change energy-storage flexible film comprises the following steps:
s1: adding a phase-change energy storage carrier into the solution containing the phase-change energy storage skeleton, and mixing to obtain a phase-change energy storage solution;
s2: adding polyethylene glycol into the phase-change energy storage solution, stirring, placing into a vacuum drying oven, taking out, and cooling to room temperature to obtain the phase-change energy storage flexible film.
2. The phase-change energy storage flexible film based on the green building material according to claim 1, wherein the phase-change energy storage skeleton is prepared by the following steps:
s21: adding dicyclohexylmethane diisocyanate, hydroxyl-terminated silicone oil and polyether polyol into a four-neck flask provided with a stirring device and a reflux condenser, adding a catalyst, and heating to react under the protection of nitrogen to obtain an intermediate A;
s22: adding dimethylolpropionic acid into a four-neck flask where the intermediate A is positioned for reaction, and adding hydroxyethyl acrylate for end sealing to obtain an intermediate B;
s23: and adding triethylamine into the intermediate B, stirring, and adding distilled water to obtain the phase-change energy storage framework.
3. The green building material-based phase-change energy storage flexible film according to claim 2, wherein the dosage ratio of dicyclohexylmethane diisocyanate, hydroxyl-terminated silicone oil and polyether polyol in the step S21 is 1049.2g:2000g:204.2g, wherein the catalyst is dibutyl tin dilaurate, and the dosage ratio of the catalyst is 3% of the mass of dicyclohexylmethane diisocyanate.
4. The green building material-based phase-change energy storage flexible film according to claim 2, wherein the dosage ratio of dimethylolpropionic acid in step S22 to dicyclohexylmethane diisocyanate in step S21 is 134.1g:1049.2g, the dosage ratio of dimethylolpropionic acid to hydroxyethyl acrylate is 134.1g:232.2g.
5. The green building material-based phase-change energy storage flexible film according to claim 2, wherein the dosage ratio of the triethylamine in the step S23 to the dimethylolpropionic acid in the step S22 is 202.4g:134.1g of triethylamine and distilled water, wherein the dosage ratio of the triethylamine to the distilled water is 202.4g:20mL.
6. The phase-change energy storage flexible film based on the green building material according to claim 1, wherein the phase-change energy storage carrier is prepared by the following steps:
s61: weighing fly ash by using a culture dish, and putting the fly ash into an electric heating constant temperature drying oven to be dried to constant weight, thereby obtaining dried fly ash;
s62: weighing dry fly ash in a beaker, adding carbon nano tube powder, stirring, dripping Arabic gum, and controlling dripping speed to obtain the phase-change energy storage carrier.
7. The flexible phase-change energy storage film based on green building materials according to claim 6, wherein the dosage ratio of the dry fly ash, the carbon nanotube powder and the acacia gum in the step S62 is 10g:5g:3g.
8. The phase-change energy-storage flexible film based on the green building material according to claim 1, wherein the solution of the phase-change energy-storage skeleton uses methyl pyrrolidone as a solvent, and the dosage ratio of the phase-change energy-storage skeleton to the methyl pyrrolidone is 1g:50g, the dosage ratio of the phase-change energy storage solution to the polyethylene glycol is 20g:1g.
9. The method for preparing the phase-change energy-storage flexible film based on the green building material according to any one of claims 1 to 8, which is characterized by comprising the following steps:
s1: adding a phase-change energy storage carrier into the solution containing the phase-change energy storage skeleton, and mixing to obtain a phase-change energy storage solution;
s2: adding polyethylene glycol into the phase-change energy storage solution, stirring, placing into a vacuum drying oven, taking out, and cooling to room temperature to obtain the phase-change energy storage flexible film.
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