CN111303840A - Preparation method of inorganic hydrous salt phase-change material - Google Patents
Preparation method of inorganic hydrous salt phase-change material Download PDFInfo
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- CN111303840A CN111303840A CN202010227720.7A CN202010227720A CN111303840A CN 111303840 A CN111303840 A CN 111303840A CN 202010227720 A CN202010227720 A CN 202010227720A CN 111303840 A CN111303840 A CN 111303840A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/02—Materials undergoing a change of physical state when used
- C09K5/06—Materials undergoing a change of physical state when used the change of state being from liquid to solid or vice versa
- C09K5/063—Materials absorbing or liberating heat during crystallisation; Heat storage materials
Abstract
The invention relates to the technical field of phase-change materials, in particular to a preparation method of an inorganic hydrous salt phase-change material. A preparation method of an inorganic hydrous salt phase change material comprises the following steps: and determining a discharge gap in the mirabilite-based phase-change nano fluid material solution, and connecting two ends of the discharge gap by using a liquid electric effect device to discharge. A method for setting inorganic hydrated salt phase-change material fibers comprises the following steps: (1) uniformly mixing the liquid phase-change material with the carbon fiber material; (2) determining the position of a discharge gap and a discharge electrode column, and applying high-definition pulses to two ends of the discharge gap in the solution; (3) repeating the step (2) for a plurality of times. The technical scheme provided by the invention can better solve the problem of performance reduction of the inorganic hydrated salt phase-change material caused by supercooling and phase layering in the long-term use process.
Description
Technical Field
The invention relates to the technical field of phase-change materials, in particular to a preparation method of an inorganic hydrous salt phase-change material.
Background
The phase change energy storage technology of inorganic hydrated salt achieves the purpose of improving the ambient temperature by absorbing and releasing a large amount of heat in the phase change process of the phase change material. The inorganic hydrated salt phase change energy storage material cannot be popularized and applied due to the fact that the inorganic hydrated salt phase change energy storage material is over-cooled, layered and low in heat conductivity coefficient, and therefore the preparation of the high-performance inorganic hydrated salt phase change energy storage material is particularly important. The material with high heat conductivity coefficient is added into the phase-change material, so that the performance of the heat storage material can be enhanced, but the specific gravity of the granular material with high heat conductivity coefficient is difficult to match with the liquid inorganic hydrated salt solution, such as some metal powder, the density is large; the activated carbon powder has low density, is not floated on the surface of the solution in a liquid solution, but is settled at the bottom of the solution, and cannot be uniformly dispersed in the solution, so that the requirement of the heat storage material on multiple solid-liquid phase changes in practical engineering is difficult to meet.
Disclosure of Invention
The invention provides a method for preparing a low-temperature hydrated salt phase-change material, which can better solve the problem of performance reduction caused by supercooling and phase layering in the long-term use process of the low-temperature hydrated salt phase-change material. In order to achieve the purpose, the invention adopts the following technical scheme:
a preparation method of an inorganic hydrous salt phase-change material is characterized by comprising the following steps: and determining a reasonable discharge gap in the mirabilite-based phase-change nano fluid material solution, and connecting two ends of the discharge gap by using a liquid electric effect device to discharge.
The mirabilite-based phase-change nano fluid material is prepared by mixing nano particles and a mirabilite phase-change material according to a mass ratio, firstly, carrying out ball milling on the mixture in a ball mill to fully mix the mixture, then heating the mixture to dissolve the mixture, controlling the temperature to be between 40 and 80 ℃, supplementing a certain amount of water to fully dissolve solids, and keeping the temperature at 40 to 80 ℃.
The nanoparticles are carbon-based nanoparticles. The technical scheme adopted by the invention can effectively disperse the carbon nanoparticles in the mirabilite-based phase-change material, remarkably improve the surface activity of the carbon nanoparticles, and effectively solve the phenomena of phase delamination and supercooling of the phase-change material caused by long-term use.
The invention provides another technical scheme: a method for setting inorganic hydrated salt phase-change material fibers comprises the following steps:
(1) uniformly mixing the liquid phase-change material with the carbon fiber material;
(2) determining the position of a discharge gap and a discharge electrode column, and applying high-definition pulses to two ends of the discharge gap in the solution;
(3) repeating the step (2) for a plurality of times.
The inorganic hydrated salt phase-change material is a mirabilite-based phase-change material.
The technical scheme adopted by the invention has the following beneficial effects: the carbon nanoparticles in the phase-change material are dispersed through the liquid-electric effect, the surface activity of the carbon nanoparticles is improved, and the supercooling and phase layering performance of the inorganic hydrous salt phase-change material can be effectively improved.
Detailed Description
The technical solution of the present invention is further explained below with reference to the specific embodiments. The invention provides a method for preparing an inorganic hydrated salt phase-change material, which can better solve the problem of performance reduction caused by supercooling and phase delamination of the inorganic hydrated salt phase-change material in the long-term use process. In order to achieve the purpose, the invention adopts the following technical scheme:
example 1:
a preparation method of an inorganic hydrous salt phase-change material is characterized by comprising the following steps: and determining a reasonable discharge gap in the mirabilite-based phase-change nano fluid material solution, and connecting two ends of the discharge gap by using a liquid electric effect device to discharge.
The mirabilite-based phase-change nano fluid material is prepared by mixing nano particles and a mirabilite phase-change material according to a mass ratio, firstly, carrying out ball milling on the mixture in a ball mill to fully mix the mixture, then heating the mixture to dissolve the mixture, controlling the temperature to be between 40 and 80 ℃, supplementing a certain amount of water to fully dissolve solids, and keeping the temperature at 40 to 80 ℃.
The nanoparticles are carbon-based nanoparticles.
Example 2;
the invention provides another technical scheme: a method for setting inorganic hydrated salt phase-change material fibers comprises the following steps:
(1) uniformly mixing the liquid phase-change material with the carbon fiber material;
(2) determining the position of a discharge gap and a discharge electrode column, and applying high-definition pulses to two ends of the discharge gap in the solution;
(3) repeating the step (2) for a plurality of times.
The phase-change material is a mirabilite-based phase-change material. The carbon fiber material is carbon fiber particles, the diameter of the carbon fiber particles is nano-scale, and the length of the carbon fiber particles is micron-scale.
It should be noted that the final product states of the embodiment 1 and the embodiment 2 are different, the product obtained in the embodiment 1 is the phase-change nano fluid material solution, and the embodiment 2 is the phase-change material after fiber shaping, which is a substance between solid and liquid.
Example 3:
the phase change material obtained in example 2 is degraded after long-term use, the positions of the discharge gap and the discharge electrode column are determined in the inorganic hydrous salt phase change material solution, and high-definition pulses are applied to both ends of the discharge gap in the solution or a liquid electric effect device is used for reaction, which is beneficial to improving the performance of the phase change material.
In summary, the technical scheme adopted by the invention has the following beneficial effects: the carbon nanoparticles in the inorganic hydrous salt phase-change material are dispersed through the liquid-electric effect, the surface activity of the carbon nanoparticles is improved, and the supercooling and phase layering performance of the inorganic hydrous salt phase-change material can be effectively improved.
Claims (5)
1. A preparation method of an inorganic hydrous salt phase-change material is characterized by comprising the following steps: and determining a discharge gap in the inorganic hydrated saltcake-based phase-change nano fluid material solution, and connecting two ends of the discharge gap by using a liquid electric effect device to discharge.
2. The method for preparing the mango nitro phase change nano fluid material as claimed in claim 1, wherein: the mirabilite-based phase-change nano fluid material is prepared by mixing nano particles and a mirabilite phase-change material according to a mass ratio, firstly, carrying out ball milling on the mixture in a ball mill to fully mix the mixture, then heating the mixture to dissolve the mixture, controlling the temperature to be between 40 and 80 ℃, supplementing a certain amount of water to fully dissolve solids, and keeping the temperature at 40 to 80 ℃.
3. The method for preparing the mango nitro phase change nano fluid material as claimed in claim 1, wherein: the nanoparticles are carbon-based nanoparticles.
4. A method for setting inorganic hydrated salt phase-change material fibers is characterized by comprising the following steps:
(1) uniformly mixing the liquid phase-change material with the carbon fiber material;
(2) determining the position of a discharge gap and a discharge electrode column, and applying high-definition pulses to two ends of the discharge gap in the solution;
(3) repeating the step (2) for a plurality of times.
5. The method according to claim 4, wherein the inorganic hydrated salt phase change material is a salt cake based phase change material.
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| CN202010227720.7A CN111303840A (en) | 2020-03-27 | 2020-03-27 | Preparation method of inorganic hydrous salt phase-change material |
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| CN202010227720.7A CN111303840A (en) | 2020-03-27 | 2020-03-27 | Preparation method of inorganic hydrous salt phase-change material |
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