CN106497519B - A kind of producing device of heat conduction with phase change piece and production method, porous aluminas skeleton - Google Patents
A kind of producing device of heat conduction with phase change piece and production method, porous aluminas skeleton Download PDFInfo
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- CN106497519B CN106497519B CN201610873100.4A CN201610873100A CN106497519B CN 106497519 B CN106497519 B CN 106497519B CN 201610873100 A CN201610873100 A CN 201610873100A CN 106497519 B CN106497519 B CN 106497519B
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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
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/005—Apparatus specially adapted for electrolytic conversion coating
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/12—Anodising more than once, e.g. in different baths
Abstract
The invention discloses a kind of heat conduction with phase change piece, including porous aluminas skeleton, organic phase change material is filled in the hole of the multiaperture electrode alumina backbone.Heat conduction with phase change piece according to the present invention fills organic phase change material using porous aluminas skeleton as thermally conductive skeleton inside it.Heat conduction with phase change piece of the invention is while possessing high thermal conductivity, and at relatively low temperatures, organic phase change material greatly reduces interface resistance, be a kind of highly desirable thermal interfacial material applied in radiating element etc. by phase transformation filling interface gap.The invention also discloses the preparation methods of above-mentioned heat conduction with phase change piece, and with simple process, easily operated, yield is high, reaction condition is mild, low power consumption and other advantages, are suitable for industrialized large-scale production.The invention also discloses a kind of producing device of porous aluminas skeleton, it can guarantee that the electrolytic process of porous aluminas skeleton well steadily carries out.
Description
Technical field
The invention belongs to Materials Science and Engineering technical fields, in particular, being related to a kind of heat conduction with phase change piece and production side
The producing device of method and porous aluminas skeleton.
Background technique
In recent years, environment and the resource problem such as greenhouse effects, the environmental pollution of sharp deterioration and fuel price rise,
The research for efficiently use etc. to energy storage project is greatly pushed.Energy storage can not only reduce Supply and Demand
Between imbalance, but also the Performance And Reliability of energy system can be improved, is played in terms of storage energy critically important
Effect.
Phase-change material (Phase change materials, PCMs) is a kind of new and high technology material that developed recently gets up
Material；Phase-change material can generate heat absorption and exothermic effect in its phase transition process, so as to play thermal energy storage and temperature regulation
Effect.And in phase-change material, organic phase-changing energy storage material is because having without supercooling and being precipitated, performance stabilization, non-toxic, nothing
The advantages that corrosivity, and the extensive concern by energy storage field researcher.Current most commonly used organic phase change material is paraffin,
It has the advantages that latent heat of phase change amount is big, transition temperature range is wide, price is low etc., using more wide in phase-changing energy storage material
It is general；But that there are still thermal coefficients is small for paraffin class organic phase change material, the disadvantages of cannot being formed and easily overflowing, thus effectively overcomes it
Disadvantage improves the application of phase-change material, is the research hotspot in paraffin class organic phase change material field.
Summary of the invention
To solve the above-mentioned problems of the prior art, the present invention provides a kind of heat conduction with phase change piece and preparation method thereof,
The heat conduction with phase change piece utilizes the phase for the phase-change material for being filled in its pore interior using porous aluminas skeleton as thermally conductive skeleton
Become energy-storage property, forms a kind of excellent thermal interfacial material.
In order to achieve the above object of the invention, present invention employs the following technical solutions:
A kind of heat conduction with phase change piece, including porous aluminas skeleton have in the hole of the porous aluminas skeleton
Machine phase-change material.
Further, the mass ratio of the quality of the organic phase change material and the porous aluminas skeleton be 1:10~
1:1。
Further, any one of the organic phase change material in paraffin, polyethylene glycol, fatty acid.
It further, is physical contact between the porous aluminas skeleton and the organic phase change material.
Another object of the present invention is to provide a kind of production methods of heat conduction with phase change piece as described above, comprising steps of
Porous aluminas skeleton is made using anode oxidation process；Organic phase-change material is filled into the hole of the porous aluminas skeleton
Material, obtains the heat conduction with phase change piece.
Further, the method for making the porous aluminas skeleton specifically includes: S1, carrying out at surface polishing to aluminium flake
Reason；S2, in acidic electrolysis bath, using the aluminium flake as anode, under the voltage of 30V~40V to the aluminium flake carry out anodic oxygen
Change 4h~6h, obtains the first oxide；S3, first oxide is dipped in the first acid solution, it is molten to carry out a hypo acid, obtains the
Dioxide；S4, the technique referring to step S2 carry out two-step anodization processing to second oxide, obtain third oxygen
Compound；S5, the third oxide is dipped in the second acid solution, progress quadratic acid is molten, obtains the porous aluminas skeleton.
Further, the acidic electrolysis bath is acid, acid and the mixed solution of alcohol or the mixed solution of acid and salt；It is described
The concentration of acid is 0.3mol/L~1mol/L, and the acid is in sulfuric acid, oxalic acid, phosphoric acid, malonic acid, malic acid, citric acid
It is at least one；The alcohol is selected from least one of methanol, ethyl alcohol, propyl alcohol；The salt in aluminum sulfate, oxalic acid aluminium at least
It is a kind of.
Further, first acid solution is the phosphate aqueous solution and mass percent that mass percent is 6%~10%
For the mixed solution of 1.8% chromic acid aqueous solution；Second acid solution is that the phosphoric acid that mass percent is 5%~10% is water-soluble
Liquid.
Further, an acid dissolution time is 6h~8h；The secondary acid dissolution time is 10h~20h.
Another object of the present invention, which also resides in, provides a kind of producing device of porous aluminas skeleton as described above, packet
Include: electrolytic cell is loaded with acidic electrolysis in the electrolytic cell including major trough and the slot that divides that is set on the side wall of the major trough
The liquid level of liquid, the acidic electrolysis bath divides open top end of the slot on the major trough side wall higher than described；Wherein, the slot of dividing
Free end passes through conductive slide glass sealing；And power supply, the anode of the power supply are connected on the conductive slide glass, the power supply
Electrolysis cathode is connected on cathode, the electrolysis cathode immerses in the acidic electrolysis bath；Wherein, aluminium flake is attached at described lead
On the inside of electric slide glass, after the power supply is connected, anodic oxidation reactions occur for the aluminium flake, and the aluminium flake becomes described porous
Alumina backbone.
The present invention is by production porous aluminas skeleton, then using the porous aluminas skeleton as thermally conductive skeleton, at it
Pore interior fills organic phase change material, final to obtain heat conduction with phase change piece.For example, the thermal coefficient of paraffin is 0.429W/ (m
K), and in the technical solution of the application, with the increase of porous aluminas skeleton quality ratio, the heat conduction with phase change piece it is thermally conductive
Coefficient gradually increases, and when the mass ratio of paraffin and porous aluminas skeleton is no more than 0.9, does not occur in test process bright
Aobvious atoleine overflows, and illustrates that the heat conduction with phase change piece can increase substantially heating conduction and can well be adsorbed in paraffin
Porous aluminas skeletal internal, and thermal coefficient reaches as high as 7W/ (mK), phase transition temperature is controllably between 50 DEG C~60 DEG C.
For heat conduction with phase change piece of the invention while possessing high thermal conductivity, at relatively low temperatures, organic phase change material passes through phase transformation
Filling interface gap, other phase-change materials compared to the prior art, greatly reduces interface resistance, is a kind of applied to scattered
Highly desirable thermal interfacial material in thermal device etc..Meanwhile the preparation method technique letter of heat conduction with phase change piece according to the present invention
It is single, easily operated, yield is high, reaction condition is mild, low energy consumption, be suitable for industrialized large-scale production.In addition, institute of the present invention
The producing device of disclosed porous aluminas skeleton compares general electrolysis unit, avoids passing through the fixation kits such as clip to consolidate
Determine aluminium flake, it is ensured that electrolytic process continuously and stably carries out.
Detailed description of the invention
What is carried out in conjunction with the accompanying drawings is described below, above and other aspect, features and advantages of the embodiment of the present invention
It will become clearer, in attached drawing:
Fig. 1 is the structural schematic diagram of the heat conduction with phase change piece of embodiment according to the present invention.
Fig. 2 is the structural schematic diagram of the porous aluminas skeleton of embodiment according to the present invention.
Fig. 3 is the SEM picture of the heat conduction with phase change piece of embodiment according to the present invention.
Fig. 4 is the structural schematic diagram of the producing device of the porous aluminas skeleton of embodiment according to the present invention.
Fig. 5 is the SEM picture of the porous aluminas skeleton of embodiment according to the present invention.
Specific embodiment
Hereinafter, with reference to the accompanying drawings to detailed description of the present invention embodiment.However, it is possible to come in many different forms real
The present invention is applied, and the present invention should not be construed as limited to the specific embodiment illustrated here.On the contrary, providing these implementations
Example is in order to explain the principle of the present invention and its practical application, to make others skilled in the art it will be appreciated that the present invention
Various embodiments and be suitable for the various modifications of specific intended application.In the accompanying drawings, for the sake of clarity, element can be exaggerated
Shape and size, and identical label will be used to indicate the same or similar element always.
Term " first ", " second " etc. herein can be used to describe various substances although will be appreciated that, these
Substance should not be limited by these terms.These terms are only used to distinguish a substance with another substance.
Fig. 1 is the structural schematic diagram of the heat conduction with phase change piece of embodiment according to the present invention；Fig. 2 is implementation according to the present invention
The structural schematic diagram of the porous aluminas skeleton of example.
Shown in referring to Figures 1 and 2, according to the heat conduction with phase change piece of the present embodiment comprising porous aluminas skeleton 100, it should
There are several through-holes 110 on porous aluminas skeleton 100；Organic phase change material 200 is filled in these through-holes 110；Namely
It says, organic phase change material 200 is filled in the hole of the porous aluminas skeleton 100.
Specifically, any one of organic phase change material 200 in paraffin, polyethylene glycol, fatty acid；Organic phase-change
The quality of material 200 and the mass ratio of porous aluminas skeleton 100 are preferably 1:10~1:1, so that the heat conduction with phase change
Piece has good heating conduction and phase transition performance.
Preferably, end of the organic phase change material 200 without departing from through-hole 110；In other words, it is filled in inside through-hole 110
Organic phase change material 200 maximum loading be the organic phase change material 200 two ends and the porous aluminas bone
The flush of frame 100.At the same time, the organic phase change material 200 and the porous aluminas skeleton being filled in inside through-hole 110
In physical contact between 100, that is to say, that organic phase change material 200 does not occur with porous aluminas skeleton 100 chemical anti-
It answers, does not generate any chemical bond.
Sem test (abbreviation SEM) is carried out to photograph thermally conductive sheet of the invention, as a result as shown in Figure 3.
The present invention also provides the production methods of above-mentioned heat conduction with phase change piece, specifically comprise the following steps:
Step 1: porous aluminas skeleton 100 is made using anode oxidation process.
Specifically, when making porous aluminas skeleton 100, surface polishing treatment is carried out to aluminium flake first.
For example, the round aluminium flake that diameter is 1.5cm will be cut into a thickness of the aluminium foil of 1mm first, through acetone and anhydrous second
It is dry after alcohol cleaning；Then perchloric acid and dehydrated alcohol that volume ratio is 1:4 are hybridly prepared into polishing fluid, are yin with graphite
Pole, round aluminium flake are anode, and electrochemical polish 90s is carried out under the polishing voltage of 20V.
Secondly final to obtain third oxidation to the aluminium flake Jing Guo polishing treatment by the molten process of anodic oxidation-acid twice
Object.
Specifically, which is the producing device based on a kind of special porous aluminas skeleton.Referring in particular to Fig. 4,
The producing device of the porous aluminas skeleton includes electrolytic cell 1 and power supply 2.Wherein, electrolytic cell 1 includes major trough 11 and setting
In dividing slot 12 on the side wall of the major trough 11, acidic electrolysis bath 3 is loaded in electrolytic cell 1, while guaranteeing the acidic electrolysis bath 3
Liquid level is higher than the top of opening of point slot 12 on 11 side wall of major trough, that is to say, that guarantee that acidic electrolysis bath 3 did not had completely
Divide the top of slot 12 slot 12 will be divided to be filled up completely.Divide the free end of slot 12 to seal by a conductive slide glass 13, is used for shape
It is attached on the inside of conductive slide glass 13 at the aluminium flake 4 of the multiaperture electrode alumina backbone 100.Power supply 2 has positive 21 Hes
Cathode 22, anode 21 are connected on conductive slide glass 13, to be powered to the aluminium flake 4；Electrolysis cathode 6 is connected on cathode 22, it should
Electrolysis cathode 6 immerses in electrolyte 3, to form current loop.After power supply 2 is connected, anodic oxidation reactions occur on aluminium flake 4,
It is accordingly changed into porous aluminas skeleton 100.
In order to guarantee that aluminium flake 4 can be firmly attached on conductive slide glass 13 dividing in slot 12, aluminium flake 4 can be cut into
This divides the cross sectional shape of slot 12 consistent shape, is provided as using in this way, dividing the inner wall of slot 12 that can play certain card to aluminium flake 4.Together
When, a rubber ring 5 preferably also is assembled in the inside of aluminium flake 4, so that aluminium flake 4 is more securely attached on conductive slide glass 13,
Anodic oxidation reactions are interrupted to prevent aluminium flake 4 to be detached from from conductive slide glass 13.Rubber ring 5 is preferably in hollow structure, so i.e.
Acidic electrolysis bath 6 can be made to form good contact with aluminium flake 4.
Conductive slide glass 13 can not make concrete regulation herein, with its materials conductive and not influence selected from copper sheet, graphite flake etc.
The anodic oxidation reactions on aluminium flake 4 occur.Meanwhile electrolysis cathode 6 generally can form electrolytic cell and work with aluminium flake 4
For the material of cathode, such as graphite electrode.
The molten process of above-mentioned anodic oxidation-acid twice is referring in particular to following methods: (1) in acidic electrolysis bath, with aluminium flake
4 be anode, carries out an anodic oxidation 4h~6h to aluminium flake 4 under the voltage of 30V~40V, obtains the first oxide；(2) will
First oxide is dipped in the first acid solution, is carried out the molten 6h~8h of a hypo acid, is obtained the second oxide；(3) in the acidic electrolysis
In liquid, using by the second oxide as anode, under the voltage of 30V~40V to the second oxide into two-step anodization 4h~
6h obtains third oxide；(4) third oxide is dipped in the second acid solution, carries out the molten 10h~20h of quadratic acid, obtained porous
Alumina backbone 100.
Specifically, the acidic electrolysis bath is acid, acid and the mixed solution of alcohol or the mixed solution of acid and salt；Sour is dense
Degree is 0.3mol/L~1mol/L, and acid is selected from least one of sulfuric acid, oxalic acid, phosphoric acid, malonic acid, malic acid, citric acid；Alcohol
Selected from least one of methanol, ethyl alcohol, propyl alcohol；Salt is selected from least one of aluminum sulfate, oxalic acid aluminium.First acid solution is quality
The mixed solution for the chromic acid aqueous solution that the phosphate aqueous solution and mass percent that percentage is 6%~10% are 1.8%；Second acid
Liquid is the phosphate aqueous solution that mass percent is 5%~10%.
Preferably, the preparation process of the first acid solution can carry out in the producing device of above-mentioned porous aluminas skeleton, matter
The side of ultrasound can be used in the chromic acid aqueous solution that the phosphate aqueous solution and mass percent that amount percentage is 6%~10% are 1.8%
Formula is to be uniformly mixed, in this way, can guarantee that aluminium flake 4 is securely solid using the producing device of above-mentioned porous aluminas skeleton of the invention
It is fixed, avoid the medium mode that aluminium flake is fixed using clip of the prior art, easily caused when being operated using ultrasound etc. aluminium flake from
The problem of falling off on clip.
Preferably, the porous aluminas skeleton 100 of acquisition is cleaned and is dried with deionized water, it is spare.
It is worth noting that can be set on the side wall of major trough 11 to improve the producing efficiency of porous aluminas skeleton 100
Multiple points of slots 12 are set, are illustrated for two points of slots 12 are set in the embodiment of the present invention,
The structural schematic diagram of the porous aluminas skeleton 100 of acquisition is shown in Fig. 2.To the porous aluminas bone of acquisition
Frame 100 has carried out sem test (abbreviation SEM), as a result as shown in Figure 5.From fig. 5, it can be seen that white portion is porous oxygen
Change aluminium skeleton 100, and the black color dots of array arrangement are several through-holes 110 formed.
Step 2: filling organic phase change material 200 in Xiang Tongkong 110, obtains heat conduction with phase change piece.
Specifically, any one of organic phase change material 200 in paraffin, polyethylene glycol, fatty acid；Organic phase-change
The quality of material 200 and the mass ratio of porous aluminas skeleton 100 are preferably 1:10~1:1.
Preferably, the organic phase on 100 surface of porous aluminas skeleton is attached to hot iron piece and the removal of plasma etching method
Become material 200, so that the table of the end for the organic phase change material 200 being filled in through-hole 110 and porous aluminas skeleton column 100
Face flush.
Above-mentioned production method of the invention will be embodied by specific embodiment below；In order to compare in each embodiment not
Same condition lists the conditional parameter of embodiment 1-5 in table form.
The conditional parameter of 1 embodiment 1-5 of table compares
In table 1, the dosage of organic phase change material indicate the organic phase change material and porous aluminas skeleton quality it
Than as " 10% paraffin " indicates that the paraffin filled in porous aluminas skeleton accounts for the matter of porous aluminas skeleton in embodiment 1
Amount 10%, that is to say, that as organic phase change material paraffin and porous aluminas skeleton mass ratio be 1:10；Together
It manages, the mass ratio of organic phase change material and porous aluminas skeleton is respectively 3:10,1:2,7:10 and 1:1 in embodiment 2-5.
Although the present invention has shown and described referring to specific embodiment, it should be appreciated by those skilled in the art that:
In the case where not departing from the spirit and scope of the present invention being defined by the claims and their equivalents, can carry out herein form and
Various change in details.
Claims (9)
1. a kind of heat conduction with phase change piece, which is characterized in that including porous aluminas skeleton, in the hole of the porous aluminas skeleton
Filled with organic phase change material；The quality of the organic phase change material and the mass ratio of the porous aluminas skeleton are 1:10
~1:1.
2. heat conduction with phase change piece according to claim 1, which is characterized in that the organic phase change material is selected from paraffin, poly- second
Any one in glycol, fatty acid.
3. heat conduction with phase change piece according to claim 1, which is characterized in that the porous aluminas skeleton and the organic phase
Become between material as physical contact.
4. a kind of production method of heat conduction with phase change piece a method according to any one of claims 1-3, which is characterized in that comprising steps of
Porous aluminas skeleton is made using anode oxidation process；
Organic phase change material is filled into the hole of the porous aluminas skeleton, obtains the heat conduction with phase change piece；It is described organic
The quality of phase-change material and the mass ratio of the porous aluminas skeleton are 1:10~1:1.
5. production method according to claim 4, which is characterized in that the method for making the porous aluminas skeleton is specific
Include:
S1, surface polishing treatment is carried out to aluminium flake；
S2, in acidic electrolysis bath, using the aluminium flake as anode, under the voltage of 30V~40V to the aluminium flake carry out anodic oxygen
Change 4h~6h, obtains the first oxide；
S3, first oxide is dipped in the first acid solution, one hypo acid of progress is molten, obtains the second oxide；
S4, the technique referring to step S2 carry out two-step anodization processing to second oxide, obtain third oxide；
S5, the third oxide is dipped in the second acid solution, progress quadratic acid is molten, obtains the porous aluminas skeleton.
6. production method according to claim 5, which is characterized in that the acidic electrolysis bath is the mixing of acid, acid and alcohol
The mixed solution of solution or acid and salt；The concentration of the acid is 0.3mol/L~1mol/L, and the acid is selected from sulfuric acid, oxalic acid, phosphorus
At least one of acid, malonic acid, malic acid, citric acid；The alcohol is selected from least one of methanol, ethyl alcohol, propyl alcohol；It is described
Salt is selected from least one of aluminum sulfate, oxalic acid aluminium.
7. production method according to claim 5, which is characterized in that first acid solution be mass percent be 6%~
The mixed solution for the chromic acid aqueous solution that 10% phosphate aqueous solution and mass percent is 1.8%；Second acid solution is quality
The phosphate aqueous solution that percentage is 5%~10%.
8. the production method according to claim 5 or 7, which is characterized in that an acid dissolution time is 6h~8h；It is described
Secondary acid dissolution time is 10h~20h.
9. a kind of producing device of porous aluminas skeleton a method according to any one of claims 1-3 characterized by comprising
Electrolytic cell is loaded with acid electricity in the electrolytic cell including major trough and the slot that divides that is set on the side wall of the major trough
Liquid is solved, the liquid level of the acidic electrolysis bath divides open top end of the slot on the major trough side wall higher than described；Wherein, described to divide slot
Free end pass through conductive slide glass sealing；
And power supply, the anode of the power supply are connected on the conductive slide glass, and electrolysis yin is connected on the cathode of the power supply
Pole, the electrolysis cathode immerse in the acidic electrolysis bath；
Wherein, aluminium flake is attached on the inside of the conductive slide glass, after the power supply is connected, anodic oxygen occurs for the aluminium flake
Change reaction, the aluminium flake becomes the porous aluminas skeleton.
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| WO2018069772A1 (en) * | 2016-10-12 | 2018-04-19 | The Hong Kong University Of Science And Technology | Lightweight and highly tough aluminum composite with ceramic matrix |
| WO2019010565A1 (en) | 2017-07-10 | 2019-01-17 | Noel John Alexander | Phase-change material and method for producing same |
| CN108531141B (en) * | 2018-06-11 | 2021-03-02 | 哈尔滨工业大学 | Preparation method of composite phase change energy storage material with organic matter filled with ordered pore alumina template |
| CN109600964A (en) * | 2018-11-13 | 2019-04-09 | 武汉华星光电半导体显示技术有限公司 | The film layer that radiates and the display device with the heat dissipation film layer |
| CN112955521B (en) * | 2021-01-19 | 2022-05-17 | 香港应用科技研究院有限公司 | Thermal conditioning module for cooling energy packs |
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| CN1690256A (en) * | 2004-04-20 | 2005-11-02 | 中国科学院理化技术研究所 | Process for preparing aperture-controllable alumina template |
| CN104449589A (en) * | 2014-12-03 | 2015-03-25 | 北京科技大学 | Preparation method of porous matrix composite phase change materials for recycling wide-temperature range afterheat |
| CN105296898A (en) * | 2015-09-23 | 2016-02-03 | 华南理工大学 | Composite phase change material heat sink of metal fiber porous skeleton and manufacturing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1690256A (en) * | 2004-04-20 | 2005-11-02 | 中国科学院理化技术研究所 | Process for preparing aperture-controllable alumina template |
| CN104449589A (en) * | 2014-12-03 | 2015-03-25 | 北京科技大学 | Preparation method of porous matrix composite phase change materials for recycling wide-temperature range afterheat |
| CN105296898A (en) * | 2015-09-23 | 2016-02-03 | 华南理工大学 | Composite phase change material heat sink of metal fiber porous skeleton and manufacturing method thereof |
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