CN112358851A - Shape-stabilized phase change material with alumina hollow sphere as carrier and preparation method thereof - Google Patents
Shape-stabilized phase change material with alumina hollow sphere as carrier and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a shape-stabilized phase change material taking an alumina hollow sphere as a carrier, which comprises the following raw material components in percentage by mass: 38.39 to 39.18 percent of paraffin, 46.07 to 46.67 percent of alumina hollow spheres and 14.74 to 14.94 percent of styrene-acrylic emulsion, wherein the sum of the mass percentages of the components is 100 percent. The shape-stabilized phase change material solves the problems of poor thermal property, low strength and the like of the existing shape-stabilized phase change material, and has the characteristics of excellent heat storage property, high heat exchange efficiency and good strength. The preparation method solves the problems of poor thermal performance, complex preparation process and high cost of the existing shape-stabilized phase-change material.
Description
Technical Field
The invention belongs to the technical field of civil engineering materials, and particularly relates to a shape-stabilized phase change material taking an alumina hollow sphere as a carrier, and a preparation method of the shape-stabilized phase change material taking the alumina hollow sphere as the carrier.
Background
With the continuous improvement of the requirement of people on the comfort level of the indoor thermal environment, the total energy consumption generated by building refrigeration and heating is gradually increased year by year. The Phase Change Material (PCM) and the conventional building material are compounded to prepare the building energy storage material, and the building energy storage material is applied to the envelope structure of the solar building, so that the heat storage and heat regulation capacity of the building can be improved, the indoor heat environment quality of the building is improved, and the building energy consumption is reduced. The solid-liquid phase change material is recognized as an energy storage material most suitable for buildings because of the advantages of wide phase change temperature, high energy storage density and the like. However, when the solid-liquid phase change material is compounded with a building material, leakage is likely to occur during use, which seriously affects the performance and applicability of the energy storage material. In this regard, the scholars have proposed some creative solutions to this problem, such as developing a shape-stabilized phase change material by a microencapsulation method, a melt copolymerization method and a porous material adsorption method, to solve the leakage problem of the solid-liquid phase change material. It is known that shaped phase change materials which can be used in building materials should have the following advantages: the phase change material has good heat storage performance, namely, has high content of the phase change material. And secondly, the material has certain mechanical strength so as to reduce the influence on the mechanical property of the building material when the material is applied to the building material. Thirdly, the material cost is low and the preparation process is simple. However, the existing shape-stabilized phase-change materials have the following technical defects:
(1) the preparation process of the shape-stabilized phase-change material is complex and the manufacturing cost of the matrix material is high
The use of shaped phase change materials for building materials tends to be very costly, and it is therefore desirable to control the cost of raw materials and simplify the manufacturing process. Document 1, "chinese patent No. CN 110272724A", discloses a method for preparing a carbon-based high thermal conductivity shape-stabilized phase change material, in which polyethylene glycol is adsorbed into a carbon-based adsorbent containing copper microspheres to prepare a shape-stabilized phase change material with high thermal conductivity. However, the method has complex preparation process, high equipment requirement and expensive raw materials, and the application of the method in building materials is greatly limited. Document 2, "chinese patent No. CN 106939156B", discloses a microcapsule-like shape-stabilized phase change material prepared by mixing Hexamethylene Diisocyanate (HDI) and low-melting paraffin wax with urea resin capsule wall by in-situ polymerization method, using Graphene Oxide (GO) and carbon nanotubes as heat conductive filler. The shape-stabilized phase change material prepared by the method has good heat storage performance, but the preparation process of the shape-stabilized phase change material not only needs a certain acid environment and electric field environment, but also needs ultrasonic action. The complex preparation process will seriously increase the manufacturing cost of the shape-stabilized phase-change material, and is not beneficial to the marketization application of the shape-stabilized phase-change material. Document 3, chinese patent No. CN103131395A, discloses a composite shape-stabilized phase change material and a preparation method thereof, wherein paraffin is encapsulated in graphite foam by high density polyethylene and SEBS. Although the shape-stabilized phase change material prepared by the method has good heat storage capacity and excellent heat exchange efficiency, the high cost of the matrix and the high temperature requirement on the preparation process are difficult to apply to the building materials in large quantity.
(2) The strength of the shape-stabilized phase change material is low
The shape-stabilized phase change material used for the building material should have certain mechanical strength so as to meet the mechanical property requirement during construction and reduce the adverse effect on the mechanical strength of the building material after the shape-stabilized phase change material is compounded into the building material. Document 4 "phase change perlite process research and phase change mortar temperature control simulation" (qian liqiao, zhang xiong, songzhi, silicate academic report, 2013(7): 987-. The chinese patent No. CN110964486A in document 5 discloses that an alkylamine functionalized graphene and paraffin wax are compounded to prepare a shape-stabilized phase change material, and a strong three-dimensional network supporting structure is formed in the shape-stabilized phase change material, but the mechanical properties of the shape-stabilized phase change material are still not satisfactory for being used in a large amount in building materials. Document 6 "sepiolite-based shape-stabilized phase change material preparation and hot-wet performance research" (jiang dawa, zhangxinlin, lao shao 29856, feihua, kuoqingjun. nonmetallic mine, 2019,42(02):72-75) discloses a shape-stabilized phase change material prepared by using sepiolite and a solid-liquid phase change material, and although the shape-stabilized phase change material has good chemical stability and thermal stability, the shape-stabilized phase change material prepared by using the method has poor mechanical properties due to the characteristics of fragile and fragile texture of sepiolite.
(3) The thermal properties of the shaped phase change material are poor.
The thermal performance of the shape-stabilized phase-change material comprises two aspects of heat storage performance and heat exchange performance. The heat storage performance is mainly determined by the content of the phase-change material, and the heat exchange performance is mainly determined by the heat conductivity of the support material. Document 7 "research on EVA for a low-melting-point paraffin-based shaping support material" (jin he, cao li, fear. chemical engineering new material, 2011,39(S2):82-84) discloses a method for preparing a shaping phase change material with good thermal stability by using EVA resin as a support material. However, such organic polymers have high thermal resistance and low thermal conductivity, and the thermal energy exchange of the phase change material can be seriously influenced when the organic polymers are used as a support material of the phase change material. Document 8 "preparation of paraffin/ethylene propylene diene monomer shaping phase change material by emulsification method and properties thereof" (Dingze, Chenhong, Zhang Kai, Yangxin, Jinghui, Wujuying Ying, where's prescription. polymer material science and engineering, 2019,35(02): 171-. The shape-stabilized phase change material has good thermal temperature property and tensile resistance, but the heat exchange efficiency is low and the preparation process is complex. Document 9 "preparation and thermal property research of diatomite-based shaped phase change composite material" (king of committee, song of seifra, cai of soldiers, wei fu, liu wei. novel chemical materials, 2019,47(10):228 yi 231.) discloses a shaped phase change material prepared by using diatomite, which has good thermal stability, but the potential heat value of the material is low as can be seen through a test result, and the thermal conductivity coefficient of diatomite as a supporting material is low, so that the heat exchange of the phase change material is not facilitated. Document 10 research on preparation of attapulgite shaped phase change materials and application thereof in cement-based materials (zhanheaf. Hubei university of Industrial science 2020.) discloses a shaped phase change material prepared by high temperature adsorption of a solid-liquid phase change material using attapulgite. Although the shape-stabilized phase change material prepared by the method has good thermal stability, the test result shows that the shape-stabilized phase change material has lower latent heat value and poorer heat storage performance.
Disclosure of Invention
The invention aims to provide a shape-stabilized phase change material taking alumina hollow spheres as a carrier, and aims to solve the problems of low strength, poor thermal property and high manufacturing cost of a base material of the existing shape-stabilized phase change material.
The invention also aims to provide a preparation method of the shape-stabilized phase change material taking the alumina hollow spheres as the carriers.
The first technical scheme adopted by the invention is that the shape-stabilized phase change material with the alumina hollow spheres as the carriers comprises the following raw material components in percentage by mass: 38.39 to 39.18 percent of paraffin, 46.07 to 46.67 percent of alumina hollow spheres and 14.74 to 14.94 percent of styrene-acrylic emulsion. The sum of the mass percentages of the components is 100 percent.
The first technical solution of the present invention is also characterized in that,
the porosity of the alumina hollow sphere is not lower than 82%.
The solid content in the styrene-acrylic emulsion is not less than 40 percent.
The paraffin is low-temperature phase-change paraffin, the phase-change temperature is 20 ℃, and the latent heat value is not less than 172J/g.
The second technical scheme adopted by the invention is that the preparation method of the shape-stabilized phase change material with the alumina hollow spheres as the carriers is implemented according to the following steps:
step 1, weighing the following raw materials in percentage by mass: 38.39 to 39.18 percent of paraffin, 46.07 to 46.67 percent of alumina hollow spheres and 14.74 to 14.94 percent of styrene-acrylic emulsion, wherein the sum of the mass percentages of the components is 100 percent;
step 2, putting the alumina hollow spheres and paraffin into a container and putting the container and the paraffin into a vacuum reaction kettle, fastening the vacuum reaction kettle, starting a vacuum pump, and vacuumizing the vacuum reaction kettle;
step 3, after the vacuumizing treatment in the step 2, opening a pressure release valve to restore the pressure in the vacuum reaction kettle to normal pressure, taking out the aluminum oxide hollow ball adsorbed with the paraffin, and putting the aluminum oxide hollow ball into a refrigerator for refrigeration to completely solidify the liquid paraffin in the aluminum oxide hollow ball to obtain a solidified aluminum oxide hollow ball;
step 4, taking out the cured alumina hollow spheres obtained in the step 3, pouring the alumina hollow spheres into styrene-acrylic emulsion, and stirring the mixture with the assistance of hand to fully mix the cured alumina hollow spheres with the styrene-acrylic emulsion to obtain the alumina hollow spheres with the styrene-acrylic emulsion adhered to the surfaces;
and 5, taking out the alumina hollow spheres with the styrene-acrylic emulsion adhered to the surfaces obtained in the step 4, paving the alumina hollow spheres on an iron screen, and placing the alumina hollow spheres in a dry environment to dry, solidify and form a film by the styrene-acrylic emulsion adhered to the surfaces of the alumina hollow spheres, so as to obtain the shape-stabilized phase change material.
The second technical solution of the present invention is also characterized in that,
the relative vacuum pressure of the vacuumizing treatment in the step 2 is not more than-0.1 MPa, and the holding time is not less than 30 min.
And 3, the temperature of the refrigerator is not higher than 5 ℃, and the refrigerating time is not lower than 2 hours.
The standing time in the step 5 is not less than 48 hours.
The beneficial effect of the invention is that,
(1) the shape-stabilized phase change material taking the alumina hollow spheres as the carrier has higher latent heat value and more obvious heat capacity advantage per unit volume;
(2) the shape-stabilized phase change material taking the alumina hollow spheres as the carrier has high heat exchange efficiency and faster thermal response.
(3) The matrix material of the shape-stabilized phase change material taking the alumina hollow spheres as the carrier has high strength, is not easy to be damaged in the using process, and has small adverse effect on the mechanical property of a building material when being applied to the building material;
(4) the preparation method of the shape-stabilized phase change material with the alumina hollow spheres as the carriers has the advantages of simple preparation process, mature production technology of raw materials, wide source and low price.
Detailed Description
The present invention will be described in detail with reference to the following embodiments.
The invention provides a shape-stabilized phase change material taking an alumina hollow sphere as a carrier, which comprises the following raw material components in percentage by mass: 38.39 to 39.18 percent of paraffin, 46.07 to 46.67 percent of alumina hollow spheres and 14.74 to 14.94 percent of styrene-acrylic emulsion, wherein the sum of the mass percentages of the components is 100 percent;
wherein, the porosity of the alumina hollow sphere is not lower than 82%; the solid content in the styrene-acrylic emulsion is not lower than 40 percent; the paraffin is low-temperature phase-change paraffin, the phase-change temperature is 20 ℃, and the latent heat value is not less than 172J/g.
The invention also provides a preparation method of the shape-stabilized phase change material with the alumina hollow spheres as the carriers, which is implemented according to the following steps:
step 1, weighing the following raw materials in percentage by mass: 38.39 to 39.18 percent of paraffin, 46.07 to 46.67 percent of alumina hollow spheres and 14.74 to 14.94 percent of styrene-acrylic emulsion, wherein the sum of the mass percentages of the components is 100 percent;
step 2, putting the alumina hollow spheres and paraffin into a container and putting the container and the paraffin into a vacuum reaction kettle, fastening the vacuum reaction kettle, starting a vacuum pump, vacuumizing the vacuum reaction kettle, wherein the relative vacuum pressure in the vacuum reaction kettle is-0.1 MPa, and the keeping time is not less than 30 min;
step 3, after the vacuumizing treatment in the step 2, opening a pressure release valve to restore the pressure in the vacuum reaction kettle to normal pressure, taking out the alumina hollow ball adsorbed with the paraffin, putting the alumina hollow ball into a refrigerator with the temperature of not higher than 5 ℃ for refrigerating for not less than 2 hours, and completely solidifying the liquid paraffin in the alumina hollow ball to obtain a solidified alumina hollow ball;
step 4, taking out the cured alumina hollow spheres obtained in the step 3, pouring the alumina hollow spheres into styrene-acrylic emulsion, and stirring the mixture with the assistance of hand to fully mix the cured alumina hollow spheres with the styrene-acrylic emulsion to obtain the alumina hollow spheres with the styrene-acrylic emulsion adhered to the surfaces;
and 5, taking out the alumina hollow spheres with the styrene-acrylic emulsion adhered to the surfaces obtained in the step 4, paving the alumina hollow spheres on an iron screen, and standing the alumina hollow spheres in a dry environment for more than 48 hours to dry, solidify and form the styrene-acrylic emulsion adhered to the surfaces of the alumina hollow spheres into a film, thereby obtaining the shape-stabilized phase change material.
Example 1
The invention also provides a preparation method of the shape-stabilized phase change material with the alumina hollow spheres as the carriers, which is implemented according to the following steps:
step 1, weighing the following raw materials in percentage by mass: 38.39% of paraffin, 46.67% of alumina hollow spheres and 14.94% of styrene-acrylic emulsion, wherein the sum of the mass percentages of the components is 100%;
step 2, putting the alumina hollow spheres and paraffin into a container and then putting the container and the paraffin into a vacuum reaction kettle, fastening the vacuum reaction kettle, starting a vacuum pump, vacuumizing the vacuum reaction kettle until the relative vacuum pressure reaches-0.1 MPa, and keeping the relative vacuum pressure for 30 min;
step 3, after the vacuumizing treatment in the step 2, opening a pressure release valve to restore the pressure in the vacuum reaction kettle to normal pressure, taking out the alumina hollow ball adsorbed with the paraffin, and putting the alumina hollow ball into a refrigerator with the temperature of not higher than 5 ℃ for refrigerating for 2 hours to completely solidify the liquid paraffin in the alumina hollow ball to obtain a solidified alumina hollow ball;
step 4, taking out the cured alumina hollow spheres obtained in the step 3, pouring the alumina hollow spheres into styrene-acrylic emulsion, and stirring the mixture with the assistance of hand to fully mix the cured alumina hollow spheres with the styrene-acrylic emulsion to obtain the alumina hollow spheres with the styrene-acrylic emulsion adhered to the surfaces;
and 5, taking out the alumina hollow spheres with the styrene-acrylic emulsion adhered to the surfaces obtained in the step 4, paving the alumina hollow spheres on an iron screen, and standing the alumina hollow spheres in a dry environment for more than 48 hours to dry, solidify and form the styrene-acrylic emulsion adhered to the surfaces of the alumina hollow spheres into a film, thereby obtaining the shape-stabilized phase change material.
Example 2
The invention also provides a preparation method of the shape-stabilized phase change material with the alumina hollow spheres as the carriers, which is implemented according to the following steps:
step 1, weighing the following raw materials in percentage by mass: 39.18 percent of paraffin, 46.07 percent of alumina hollow spheres and 14.74 percent of styrene-acrylic emulsion, wherein the sum of the mass percentages of the components is 100 percent;
step 2, putting the alumina hollow spheres and paraffin into a container and then putting the container and the paraffin into a vacuum reaction kettle, fastening the vacuum reaction kettle, starting a vacuum pump, vacuumizing the vacuum reaction kettle to enable the relative vacuum pressure in the vacuum reaction kettle to be-0.1 MPa, and keeping the relative vacuum pressure for 60 min;
step 3, after the vacuumizing treatment in the step 2, opening a pressure release valve to restore the pressure in the vacuum reaction kettle to normal pressure, taking out the alumina hollow sphere adsorbed with the paraffin, and putting the alumina hollow sphere into a refrigerator at the temperature of not higher than 5 ℃ for refrigerating for 2.5 hours to completely solidify the liquid paraffin in the alumina hollow sphere to obtain a solidified alumina hollow sphere;
step 4, taking out the cured alumina hollow spheres obtained in the step 3, pouring the alumina hollow spheres into styrene-acrylic emulsion, and stirring the mixture with the assistance of hand to fully mix the cured alumina hollow spheres with the styrene-acrylic emulsion to obtain the alumina hollow spheres with the styrene-acrylic emulsion adhered to the surfaces;
and 5, taking out the alumina hollow spheres with the styrene-acrylic emulsion adhered to the surfaces obtained in the step 4, paving the alumina hollow spheres on an iron screen, and standing the alumina hollow spheres in a dry environment for more than 48 hours to dry, solidify and form the styrene-acrylic emulsion adhered to the surfaces of the alumina hollow spheres into a film, thereby obtaining the shape-stabilized phase change material.
Example 3
The invention also provides a preparation method of the shape-stabilized phase change material with the alumina hollow spheres as the carriers, which is implemented according to the following steps:
step 1, weighing the following raw materials in percentage by mass: 38.75 percent of paraffin, 46.40 percent of alumina hollow spheres and 14.85 percent of styrene-acrylic emulsion, wherein the sum of the mass percentages of the components is 100 percent;
step 2, putting the alumina hollow spheres and paraffin into a container and putting the container and the paraffin into a vacuum reaction kettle, fastening the vacuum reaction kettle, starting a vacuum pump, vacuumizing the vacuum reaction kettle until the relative vacuum pressure reaches-0.1 MPa, and keeping the relative vacuum pressure for 120 min;
step 3, after the vacuumizing treatment in the step 2, opening a pressure release valve to restore the pressure in the vacuum reaction kettle to normal pressure, taking out the alumina hollow ball adsorbed with the paraffin, and putting the alumina hollow ball into a refrigerator at the temperature of not higher than 5 ℃ for refrigerating for 3 hours to completely solidify the liquid paraffin in the alumina hollow ball to obtain a solidified alumina hollow ball;
step 4, taking out the cured alumina hollow spheres obtained in the step 3, pouring the alumina hollow spheres into styrene-acrylic emulsion, and stirring the mixture with the assistance of hand to fully mix the cured alumina hollow spheres with the styrene-acrylic emulsion to obtain the alumina hollow spheres with the styrene-acrylic emulsion adhered to the surfaces;
and 5, taking out the alumina hollow spheres with the styrene-acrylic emulsion adhered to the surfaces obtained in the step 4, paving the alumina hollow spheres on an iron screen, and standing the alumina hollow spheres in a dry environment for more than 48 hours to dry, solidify and form the styrene-acrylic emulsion adhered to the surfaces of the alumina hollow spheres into a film, thereby obtaining the shape-stabilized phase change material.
The shaped phase change materials prepared in examples 1 to 3 were subjected to performance tests, and the specific results are shown in table 1:
TABLE 1 Properties of the shaped phase Change materials prepared
As can be seen from Table 1, the phase-change latent heat value of the shape-stabilized phase-change material taking the alumina hollow spheres as the carriers can reach 73.53J/g, and the heat storage performance is excellent. The invention relates to a preparation method of a shape-stabilized phase-change material taking an alumina hollow sphere as a carrier, which compounds phase-change paraffin and the alumina hollow sphere, wherein a styrene-acrylic emulsion is used as a surface packaging material, and the low-temperature phase-change paraffin has the advantages of wide phase-change temperature, high energy storage density, good chemical stability, no supercooling and phase separation, wide raw material source, low price and the like; the alumina hollow ball is formed by melting and blowing industrial alumina in an electric furnace, and has the following characteristics: (1) the spherical structure enables the material to have larger cavity volume, and phase-change paraffin with larger volume can be loaded; (2) the thermal conductivity of the compact alumina spherical shell is as high as 30.00 W.m < -1 >. K < -1 >; (3) the alumina hollow sphere has proper mechanical strength; (4) alumina is a material with good chemical stability. In consideration of four aspects of porosity, thermal conductivity, mechanical strength and chemical stability, the alumina hollow sphere can be used as a matrix support material of the phase change material; the styrene-acrylic emulsion is obtained by emulsion copolymerization of styrene and acrylic ester monomers, has wide application in various fields, and has the advantages of good adhesive force, transparent adhesive film, water resistance, oil resistance, heat resistance and good aging resistance.
Based on the description above, the shape-stabilized phase change material using the alumina hollow spheres as the carrier has the characteristics of excellent heat storage performance, high heat exchange efficiency and good strength. The preparation method of the shape-stabilized phase change material taking the alumina hollow sphere as the carrier is simple and has low equipment requirement.
Claims (8)
1. The shape-stabilized phase change material taking the alumina hollow spheres as the carriers is characterized by comprising the following raw material components in percentage by mass: 38.39 to 39.18 percent of paraffin, 46.07 to 46.67 percent of alumina hollow spheres and 14.74 to 14.94 percent of styrene-acrylic emulsion, wherein the sum of the mass percentages of the components is 100 percent.
2. The shape-stabilized phase change material taking the alumina hollow spheres as the carriers of claim 1, wherein the porosity of the alumina hollow spheres is not lower than 82%.
3. The shape-stabilized phase change material taking alumina hollow spheres as carriers as claimed in claim 1, wherein the solid content in the styrene-acrylic emulsion is not less than 40%.
4. The shape-stabilized phase change material taking the alumina hollow spheres as the carriers as claimed in claim 1, wherein the paraffin is low-temperature phase change paraffin, the phase change temperature is 20 ℃, and the latent heat value is not less than 172J/g.
5. A preparation method of a shape-stabilized phase change material taking an alumina hollow sphere as a carrier is characterized by comprising the following steps:
step 1, weighing the following raw materials in percentage by mass: 38.39 to 39.18 percent of paraffin, 46.07 to 46.67 percent of alumina hollow spheres and 14.74 to 14.94 percent of styrene-acrylic emulsion, wherein the sum of the mass percentages of the components is 100 percent;
step 2, putting the alumina hollow spheres and paraffin into a container and putting the container and the paraffin into a vacuum reaction kettle, fastening the vacuum reaction kettle, starting a vacuum pump, and vacuumizing the vacuum reaction kettle;
step 3, after the vacuumizing treatment in the step 2, opening a pressure release valve to restore the pressure in the vacuum reaction kettle to normal pressure, taking out the aluminum oxide hollow ball adsorbed with the paraffin, and putting the aluminum oxide hollow ball into a refrigerator for refrigeration to completely solidify the liquid paraffin in the aluminum oxide hollow ball to obtain a solidified aluminum oxide hollow ball;
step 4, taking out the cured alumina hollow spheres obtained in the step 3, pouring the alumina hollow spheres into styrene-acrylic emulsion, and stirring the mixture with the assistance of hand to fully mix the cured alumina hollow spheres with the styrene-acrylic emulsion to obtain the alumina hollow spheres with the styrene-acrylic emulsion adhered to the surfaces;
and 5, taking out the alumina hollow spheres with the styrene-acrylic emulsion adhered to the surfaces obtained in the step 4, paving the alumina hollow spheres on an iron screen, and placing the alumina hollow spheres in a dry environment to dry, solidify and form a film by the styrene-acrylic emulsion adhered to the surfaces of the alumina hollow spheres, so as to obtain the shape-stabilized phase change material.
6. The method for preparing the shape-stabilized phase change material with the alumina hollow spheres as the carriers according to claim 5, wherein the relative vacuum pressure of the vacuumizing treatment in the step 2 is not more than-0.1 MPa, and the holding time is not less than 30 min.
7. The method for preparing the shape-stabilized phase change material with the alumina hollow spheres as the carriers according to claim 5, wherein the temperature of a refrigerator in the step 3 is not higher than 5 ℃, and the refrigerating time is not lower than 2 hours.
8. The method for preparing the shape-stabilized phase change material with the alumina hollow spheres as the carriers according to claim 5, wherein the standing time in the step 5 is not less than 48 hours.
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| CN115433424A (en) * | 2022-09-13 | 2022-12-06 | 华中科技大学 | Low-oil-permeability phase-change heat conducting fin and preparation method thereof |
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| CN103509526A (en) * | 2012-06-17 | 2014-01-15 | 曹雪娟 | Porous substrate phase-changing heat storage particles and preparation method thereof |
| CN103525373A (en) * | 2012-07-05 | 2014-01-22 | 中国科学院大连化学物理研究所 | Composite amorphous phase-change heat storage material and preparation method thereof |
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| US20130298991A1 (en) * | 2012-05-11 | 2013-11-14 | Pcm Innovations Llc | Phase change aggregates including particulate phase change material |
| CN103509526A (en) * | 2012-06-17 | 2014-01-15 | 曹雪娟 | Porous substrate phase-changing heat storage particles and preparation method thereof |
| CN103525373A (en) * | 2012-07-05 | 2014-01-22 | 中国科学院大连化学物理研究所 | Composite amorphous phase-change heat storage material and preparation method thereof |
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| CN115433424A (en) * | 2022-09-13 | 2022-12-06 | 华中科技大学 | Low-oil-permeability phase-change heat conducting fin and preparation method thereof |
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