KR101666169B1 - Latent heat storage material and method thereof - Google Patents
Latent heat storage material and method thereof Download PDFInfo
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- KR101666169B1 KR101666169B1 KR1020150116747A KR20150116747A KR101666169B1 KR 101666169 B1 KR101666169 B1 KR 101666169B1 KR 1020150116747 A KR1020150116747 A KR 1020150116747A KR 20150116747 A KR20150116747 A KR 20150116747A KR 101666169 B1 KR101666169 B1 KR 101666169B1
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- latent heat
- porous material
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- change material
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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
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/009—Porous or hollow ceramic granular materials, e.g. microballoons
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/81—Coating or impregnation
- C04B41/82—Coating or impregnation with organic materials
Abstract
Description
The present invention relates to a latent heat storage material having a high latent heat development amount and a method for producing the same.
Latent heat is the heat that absorbs or releases a substance when it transitions from solid to liquid phase or from liquid to solid phase, and Phase Change Material (PCM) refers to a material that uses such latent heat . Such a phase change material may be referred to as a 'latent heat storage material' or a 'latent heat storage material'. In the present specification, a material that stores heat using such a phase change material is referred to as a latent heat storage material.
Recently, a lot of research has been conducted on latent heat storage materials using latent heat of the phase change material. These materials have the advantage that the storage capacity of thermal energy per unit volume and unit weight is large, Since thermocline phenomenon is not so severe, there is an advantage that heat storage and heat radiation can be performed at a substantially constant temperature within a range suitable for the use temperature.
Currently, a method for producing a latent heat storage material prepared by a vacuum impregnation method using diatomaceous earth, silica fume or the like as a porous material has been partially disclosed. However, the latent heat storage material produced by this method has a problem that the impregnation amount of the phase change material And the amount of latent heat is as low as 50% or less.
Accordingly, the phase change material can be impregnated into the pores of the porous material as much as possible, and development of a latent heat storage material having a high latent heat development amount is required.
The present invention is to provide a latent heat storage material having a high latent heat development amount.
The present invention also provides a method of manufacturing the latent heat storage material.
The present invention relates to a porous material comprising at least one oxide selected from the group consisting of sodium oxide, iron oxide (III) and sulfur trioxide, and silicon dioxide; And a phase change material impregnated in the porous material, wherein the latent heat storage amount is 55% or more.
The present invention also relates to a method for manufacturing a semiconductor device, which comprises at least one oxide selected from the group consisting of sodium oxide, iron oxide (III) and sulfur trioxide; And impregnating the porous material containing silicon dioxide with a phase change material.
BEST MODE FOR CARRYING OUT THE INVENTION A latent heat storage material according to a specific embodiment of the present invention and a method for producing the same will be described in detail below.
According to one embodiment of the invention, there is provided a porous material comprising at least one oxide selected from the group consisting of sodium oxide, iron oxide (III) and sulfur trioxide, and silicon dioxide; And a phase change material impregnated in the porous material, wherein a latent heat storage material having an amount of latent heat of 55% or more can be provided.
The inventors of the present invention have recognized that latent heat storage materials using diatomaceous earth, silica fume and the like as porous materials have a latent heat capacity limit for use as building materials because latent heat storage amount is less than 50% It has been confirmed through experiments that a latent heat storage material exhibiting a high latent heat quantity can be prepared when a specific amount of a specific oxide other than silicon dioxide is included in a predetermined amount as a porous material, .
More specifically, the latent heat storage material of the embodiment essentially contains silicon dioxide (SiO 2 ) as a porous material, and sodium oxide (Na 2 O), iron oxide (III, Fe 2 O 3 ), and sulfur trioxide (SO 3 ) , The phase change material can be more impregnated into the pores of the porous material, so that the amount of latent heat expressed relative to the pure phase change material can be increased.
Particularly, in the porous material, silicon dioxide (SiO 2 ) is expected to exhibit characteristics such as high thermal stability and strength even in an environment where it is diversified as an inorganic material, and sodium oxide is presumed to play a role of lowering the melting point of the porous material . The iron oxide (III) is expected to control the structure and size of the pores of the porous silica by acting as a foaming agent. In particular, the iron oxide forms an open pore, In the United States. And, it is assumed that sulfur trioxide plays a role of coloring the porous material.
As described above, the porous material can produce a latent heat storage material including an oxide having a role other than silicon dioxide and exhibiting a high latent heat development amount, and it is possible to produce a latent heat storage material containing sodium oxide, iron oxide (III) More preferable.
At this time, the amount of latent heat of the latent heat storage material may be 55% or more, preferably 58 to 99%. The amount of latent heat is expressed as the ratio of the latent heat storage amount (B) of the latent heat storage material to the latent heat amount (A) of the pure phase change material.
[Formula 1]
(%) = (B / A) * 100
The porous material may contain 0.1 to 10 parts by weight, preferably 1 to 5 parts by weight, of at least one oxide selected from the group consisting of sodium oxide, iron oxide (III) and sulfur trioxide with respect to 100 parts by weight of silicon dioxide have.
In addition, the porous material may have a particle size of 1 to 100 탆, preferably 5 to 50 탆. The particle size of the porous material is measured according to ISO 13320-1 standard. When the particle size of the porous material is too small, the density may be too small to be applied to the application field. If the particle size is too large, It can not be applied to areas such as paint.
The porous material may have a specific surface area of 10 to 1,000 m 2 / g, preferably 50 to 600 m 2 / g. The specific surface area of the porous material is measured according to ISO 5794-1, Annex D.
The porous material may exhibit an adsorption amount of 150 to 500 g / 100 g, preferably 200 to 400 g / 100 g. The adsorption amount is measured according to DIN 53601 standard.
Meanwhile, the porous material may further include carbon (C) in addition to at least one oxide selected from the group consisting of silicon dioxide, sodium oxide, iron oxide (III), and sulfur trioxide. At this time, when the carbon (C) is further included, the hydrophobicity of the porous material can be maximized, and the hydrophobic phase-change material can be impregnated into the pores of the porous material better.
The carbon (C) may be contained in an amount of 0.1 to 10 parts by weight, preferably 1 to 5 parts by weight, based on 100 parts by weight of silicon dioxide.
The latent heat storage material of one embodiment may include the phase change material impregnated in the porous material.
The phase change material (PCM) is a substance that absorbs or emits heat when it is phase-transformed from a solid phase to a liquid phase or from a liquid phase to a solid phase. The phase change material includes methoxypolyethylene glycol, hexadecane, (Heptadecane), octadecane, and paraffin.
The phase change material may be impregnated with the porous material described above. More specifically, the phase-change material may be impregnated in a form adsorbed on the pore surface of the porous material by physicochemical forces.
The latent heat storage material may contain 100 to 500 parts by weight, preferably 150 to 400 parts by weight, of the phase change material with respect to 100 parts by weight of the porous material. As described above, the porous material included in the latent heat storage material of one embodiment may contain a large amount of the phase change material as described above by further containing a predetermined amount of a specific oxide in addition to silicon dioxide.
The porous material of one embodiment may exhibit hydrophilicity or hydrophobicity. In order for the latent heat storage material to exhibit a higher latent heat development amount, a hydrophilic phase change material is used for the hydrophilic porous material and a hydrophilic phase change material is used for the hydrophobic porous material It is preferable to use a hydrophobic phase change material.
For example, the hydrophilic porous material is preferably a methoxypolyethylene glycol as a phase change material, and the hydrophobic porous material may be a phase change material such as hexadecane, heptadecane, octadecane, Or alkane or paraffin is preferably used in view of the amount of latent heat.
According to another embodiment of the present invention, there is provided a method for manufacturing a semiconductor device, comprising the steps of: impregnating a porous material containing a silicon dioxide and at least one oxide selected from the group consisting of sodium oxide, iron oxide (III) A method for producing a heat storage material can be provided.
The porous material and the phase change material may be applied to the latent heat storage material of the embodiment without limitation. In this way, the porous material and the phase change material may be coated with the porous silicon oxide, When a material is used, a latent heat storage material exhibiting a high latent heat quantity can be produced.
The step of impregnating the porous material with the phase change material may be performed while being fixed to a water bath at 40 to 80 ° C. That is, the porous material and the phase change material may be impregnated into the porous material by putting the porous material and the phase change material into the flask, fixing the flask to the water bath, and reacting for a predetermined time. At this time, the porous material and the phase change material may be simultaneously introduced into the flask, the respective materials may be sequentially introduced, and the flask may be fixed to the water bath at any stage. The porous material may be in the form of a solid powder, and the phase change material is preferably in a liquid state.
In addition, the step of impregnating the porous material with the phase change material may be performed for 30 to 60 minutes.
According to the present invention, a latent heat storage material having a high latent heat development amount and a method for producing the same can be provided.
1 is a graph showing a DSC analysis result of the latent heat storage material prepared in Examples 1 to 3.
FIG. 2 is a graph showing a DSC analysis result of the latent heat storage materials prepared in Examples 4 to 6. FIG.
3 is a graph showing a DSC analysis result of the latent heat storage materials prepared in Examples 7 to 8.
4 is a graph showing a DSC analysis result of the latent heat storage material prepared in Example 9. Fig.
5 is a graph showing the results of DSC analysis of the latent heat storage materials prepared in Comparative Examples 1 to 3.
The invention will be described in more detail in the following examples. However, the following examples are illustrative of the present invention, and the present invention is not limited by the following examples.
Manufacturing example : Porous material
Preparation Example 1:
Preparation Example 2:
SIPERNAT D10 from EVONIK was used as the porous material, This is a white powdery hydrophobic material in which 1.02 parts by weight of sodium oxide, 0.03 parts by weight of iron oxide (III), 0.82 part by weight of sulfur trioxide and 3.06 parts by weight of carbon are mixed with respect to 100 parts by weight of silicon dioxide.
Preparation Example 3:
As a porous material, Grace's XPO 2402 was used, It is a white powdery hydrophilic material.
Example: Production of latent heat storage material
Example 1:
10 g of the porous material of Preparation Example 1 was placed in a flask and fixed in a water bath at 60 ° C. Then, 33 g of methoxypolyethylene glycol (MPEG 750, Lotte Chemical) as a liquid phase change material was put into a water bath and stirred for 30 minutes to sufficiently impregnate the phase change material, thereby preparing a latent heat storage material.
Example 2:
A latent heat storage material was prepared in the same manner as in Example 1, except that methoxypolyethylene glycol (MPEG 1000; Lotte Chemical) was used instead of methoxypolyethylene glycol (MPEG 750; Lotte Chemical) as a phase change material.
Example 3:
A latent heat storage material was prepared in the same manner as in Example 1, except that methoxypolyethylene glycol (MPEG 1200, Lotte Chemical) was used instead of methoxypolyethylene glycol (MPEG 750; Lotte Chemical) as a phase change material.
Example 4:
10 g of the porous material of Preparation Example 2 was placed in a flask and fixed in a water bath at 40 占 폚. Then, 18 g of hexadecane (Sigma aldrich) as a liquid phase change material was put into a water bath and stirred for 30 minutes to sufficiently impregnate the phase change material to prepare a latent heat storage material.
Example 5:
A latent heat storage material was prepared in the same manner as in Example 4 except that n-heptadecane (ALFA) was used instead of hexadecane (Sigma aldrich) as a phase change material.
Example 6:
A latent heat storage material was prepared in the same manner as in Example 4 except that n-octadecane (sigma aldrich) was used instead of hexadecane (Sigma aldrich) as a phase change material.
Example 7:
10 g of the porous material of Preparation Example 2 was placed in a flask and fixed in a water bath at 80 ° C. Then, 18 g of paraffin I (Paraffin solid (P0076); Samchun) as a liquid phase change material was put into a water bath and stirred for 30 minutes to sufficiently impregnate the phase change material to prepare a latent heat storage material. The paraffin I means paraffin having a melting point of 46 to 48 ° C.
Example 8:
A latent heat storage material was prepared in the same manner as in Example 7, except that paraffin II (Paraffin solid (P0079); Samchun) was used as a phase change material instead of Paraffin I (Paraffin solid (P0076); Samchun). Paraffin II means paraffin having a melting point of 56 to 58 ° C.
Example 9:
A latent heat storage material was prepared in the same manner as in Example 7 except that paraffin III (Paraffin wax (411663); Sigma aldrich) was used as a phase change material instead of paraffin I (Paraffin solid (P0076); Samchun). Paraffin III means paraffin having a melting point of 65 ° C or higher.
Comparative Example 1:
A latent heat storage material was prepared in the same manner as in Example 1 except that the porous material of Production Example 3 was used and 16 g of the phase change material was added.
Comparative Example 2:
A latent heat storage material was prepared in the same manner as in Example 2 except that the porous material of Production Example 3 was used and 16 g of the phase change material was added.
Comparative Example 3:
A latent heat storage material was prepared in the same manner as in Example 3 except that the porous material of Production Example 3 was used and 16 g of the phase change material was added.
EXPERIMENTAL EXAMPLE 1 Measurement of Physical Properties of Porous Material
Physical properties of the porous materials of Production Examples 1 and 2 were measured in the following manner, and the results are shown in Table 1 below.
Experimental Example 2: Latent heat storage material Property measurement
The latent heat storage materials prepared in Examples 1 to 9 and Comparative Examples 1 to 3 were subjected to differential scanning calorimetry (DSC) analysis and are shown in Figs. 1 to 5.
In the graphs of FIGS. 1 to 5, the graph of a section with a positive heat flow means a latent heat amount that releases heat upon phase change from liquid to solid, and a graph with a negative heat flow indicates a column (Melting heat) that absorbs the heat of fusion.
Generally, when referring to the amount of latent heat of a substance, most of it means melting heat. Therefore, in the following graph analysis and in the present specification, the amount of latent heat is calculated as the heat value of the heat flow in the negative range.
1 is a graph showing DSC analysis results of the latent heat storage materials of Examples 1 to 3 prepared using methoxy polyethylene glycol (MPEG 750, MPEG 1000, MPEG 1200) as a porous material and a phase change material of Production Example 1. The latent heat amounts of pure MPEG 750, MPEG 1000 and MPEG 1200 are 162.8 J / g, 174.0 J / g and 173.5 J / g, respectively. Referring to FIG. 1, the amounts of latent heat of Examples 1 to 3 are 113.2 J / g, 121.7 J / g, and 121.0 J / g, respectively, it can be seen that the latent heat storage materials of Examples 1 to 3 exhibited an average latent heat development amount of 70% on the average of the pure phase change materials. At this time, 750, 1000 and 1200 in MPEG 750, MPEG 1000 and MPEG 1200 mean molecular weight.
2 shows a graph of DSC analysis results of the latent heat storage materials of Examples 4 to 6 prepared by using hexadecane, heptadecane, and octadecane as the porous material and the phase change material of Production Example 2. FIG. The latent heat amounts of pure hexadecane, heptadecane and octadecane were 244.7 J / g, 227.7 J / g and 245.4 J / g, respectively. Referring to FIG. 2, the amounts of latent heat of Examples 4 to 6 were 149.6 J / g, 137.8 J / g, and 147.4 J / g, respectively, it can be seen that the latent heat storage materials of Examples 4 to 6 exhibited an average latent heat of 60% compared to pure phase change materials.
3 and 4 show graphs of DSC analysis results of the latent heat storage materials of Examples 7 to 9 prepared by using paraffin (paraffin I, paraffin II, paraffin III) as the porous material and the phase change material of Production Example 2 . The latent heat amounts of pure paraffin I, paraffin II and paraffin III are 205.1 J / g, 210.6 J / g and 211.4 J / g, respectively. Referring to FIGS. 3 and 4, 128.4 J / g, 130.9 J / g, and 137.2 J / g, it can be seen that the latent heat storage materials of Examples 7 to 9 exhibited an average latency of 64% over the pure phase change material. Paraffin I has a melting point of 46 to 48 ° C., paraffin II has a melting point of 56 to 58 ° C., paraffin Ⅲ has a melting point of 65 ° C. Or more.
5 shows a graph of DSC analysis results of the latent heat storage materials of Comparative Examples 1 to 3 prepared using methoxy polyethylene glycol (MPEG 750, MPEG 1000, MPEG 1200) as the porous material and the phase change material of Production Example 3 . The latent heat amounts of pure MPEG 750, MPEG 1000 and MPEG 1200 are 162.8 J / g, 174.0 J / g and 173.5 J / g, respectively. Referring to FIG. 5, the latent heat amounts of Comparative Examples 1 to 3 are 85.2 J / g, 80.2 J / g, and 84.8 J / g, respectively, it can be seen that the latent heat storage materials of Comparative Examples 1 to 3 exhibited an average latency of 48% on the average of the pure phase change materials.
In other words, when the porous material includes a specific oxide such as sodium oxide, iron oxide (III), or sulfur trioxide together with silicon dioxide as in the above embodiment, it can be confirmed that the amount of latent heat is high. These latent heat storage materials are excellent in thermal efficiency, so they can be used for concrete, building roof and ceiling, floor heating system, Can be applied.
Claims (13)
And a phase change material impregnated in the porous material, wherein the amount of latent heat is 55% or more.
Wherein the porous material comprises 0.1 to 10 parts by weight of an oxide containing sodium oxide, iron oxide (III) and sulfur trioxide per 100 parts by weight of silicon dioxide.
Wherein the porous material has a particle size of 1 to 100 mu m.
Wherein the porous material has a specific surface area of 10 to 1,000 m < 2 > / g.
Wherein the porous material has an adsorption amount of 150 to 500 g / 100 g.
Wherein the porous material further comprises carbon (C).
Wherein the carbon (C) is contained in an amount of 0.1 to 10 parts by weight based on 100 parts by weight of the silicon dioxide.
Wherein the phase change material comprises at least one selected from the group consisting of methoxypolyethylene glycol, hexadecane, heptadecane, octadecane, and paraffin.
Wherein the phase change material comprises 100 to 500 parts by weight based on 100 parts by weight of the porous material.
Wherein the step of impregnating the porous material with the phase change material is performed while being fixed to a water bath at 40 to 80 ° C.
Wherein the step of impregnating the porous material with the phase change material is performed for 30 to 60 minutes.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109437768A (en) * | 2018-12-25 | 2019-03-08 | 成都宏基建材股份有限公司 | Using high-titanium slag as C40 phase-change accumulation energy concrete of phase transformation carrier and preparation method thereof |
| CN109825254A (en) * | 2019-03-14 | 2019-05-31 | 华南农业大学 | A kind of polyethylene glycol wood powder composite phase-change energy storage material and its preparation method and application |
| KR20190111657A (en) * | 2018-03-23 | 2019-10-02 | 한국신발피혁연구원 | Method for manufacturing porous latent heat storage material comprising phase-change material |
| CN112851403A (en) * | 2021-02-04 | 2021-05-28 | 西安建筑科技大学 | Hollow phase change energy storage ceramsite and preparation method thereof |
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