CN102241963B - Shape-stabilized phase change energy storage material with high-thermal conductivity and preparation method thereof - Google Patents
Shape-stabilized phase change energy storage material with high-thermal conductivity and preparation method thereof Download PDFInfo
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- CN102241963B CN102241963B CN 201110132925 CN201110132925A CN102241963B CN 102241963 B CN102241963 B CN 102241963B CN 201110132925 CN201110132925 CN 201110132925 CN 201110132925 A CN201110132925 A CN 201110132925A CN 102241963 B CN102241963 B CN 102241963B
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Abstract
The invention discloses a shape-stabilized phase change energy storage material with high-thermal conductivity, and the material comprises the following components by weight percentage: 80% - 90% of phase change material microcapsule, 1% - 10% of high heat conduction material and 0 % - 15% of adhesive. The invention also discloses a method for producing the shape-stabilized phase change energy storage material with high-thermal conductivity which comprises the following steps: (1) selecting the phase change material with high heat storage capability, producing the phase change material or purchasing the phase change material microcapsule to take as raw materials for processing in the next step; (2) fully and uniformly mixing the phase change material microcapsule and the high heat conduction material according to a formula proportion in a feed mixer; when the high heat conduction material selects the metal powder, nitrogen is filled in the feed mixer for preventing the dust blast of metal powder; (3) putting the uniformly mixed powder in a tablet press for compacting and molding under the pressure of 15 - 400 MPa. The shape-stabilized phase change energy storage material with high-thermal conductivity of the invention is a favorable heat storage medium, and has a wide application prospect in the fields of building energy saving and industrial energy saving.
Description
Technical field
The present invention relates to the phase-change accumulation energy field, be specifically related to a kind of take phase-change material micro-capsule as major ingredient and add setting phase change energy storage material with high-thermal conductivity and the manufacture method thereof that highly heat-conductive material is produced.
Background technology
Phase change material has high heat storage ability and stable working temperature, these advantages so that phase change material have broad application prospects in fields such as building heating and refrigeration, solar energy heating and semi-conductor coolings.Yet phase change material also exists two main drawbacks: namely thermal conductivity is low and have a leakage problem when being used with other materials.There have been at present many patented technologies to propose respectively solution for these two problems.Aspect the increase thermal conductivity, patent CN200710012102.5 has adopted nanofiber, and patent CN200820035123.9 has adopted metal fin and honeycomb structure, and patent CN200480041392.0 has adopted foam metal material; And for leakage problem some terms of settlement are arranged also, patent CN200810157553.2 adopts situ aggregation method to prepare phase-change material micro-capsule, patent CN200810154238.4 is with paraffin (massfraction 81-99.5%), high density polyethylene(HDPE) (massfraction 0-9%) and polyvalent alcohol acetal compound (massfraction 0.5-10%) carry out melt compounding and then cool off the preparation shaping phase-change material, also have patent CN200410101555.1 with paraffin (massfraction 70-80%), crosslinked high density polyethylene(HDPE) (massfraction 2-15%), expanded graphite (massfraction 4-6%) prepares shaping phase-change material with the melting of SBS (SBS) Hybrid Heating.
Although present phase-change material micro-capsule technology and shaping phase-change material technology can address the leakage concern, and still have other problem in these production technologies:
Because shaping phase-change material need to mix with macromolecular material at present, so that wherein the phase change material massfraction reduces, thereby cause the heat storage capacity of product to descend.
When the preparation shaping phase-change material, need to all material be melted by high temperature, but the viscosity of various materials is different, and viscosity is higher, therefore be difficult to mix, and the production cycle is longer.
Phase-change material micro-capsule because it is lower to produce the tap density that causes in a large amount of spaces between the microcapsule granule, has caused the unit volume energy storage density lower in application process thus.
Summary of the invention
The present invention is directed to the above-mentioned deficiency of prior art, in conjunction with the advantage of phase-change material micro-capsule, provide a kind of and have high heat storage density and high thermal conductivity, and the low setting phase change energy storage material with high-thermal conductivity of production cost.
In order to solve the problems of the technologies described above, technical scheme of the present invention is summarized as follows: a kind of setting phase change energy storage material with high-thermal conductivity, this material is comprised of by the different mass mark following composition: phase-change material micro-capsule 80%～99%, high conductivity material 1%～10%, tackiness agent 0%～15%.
Phase change material in the phase-change material micro-capsule of the present invention is organic materials (such as n-Hexadecane, octadecane etc.), also can be inorganic materials (such as salt hydrate etc.).
Highly heat-conductive material of the present invention is metal powder, steel fiber or scrap metal etc., and metal can be aluminium or copper etc.
Tackiness agent of the present invention can be one or more in latex, heat conductive silica gel, epoxy resin glue, the hot melt adhesive etc.
In addition, the present invention also provides a kind of manufacture method of described setting phase change energy storage material with high-thermal conductivity, and concrete manufacturing step is as follows:
(1) selects phase change material with high heat storage ability, preparation phase-change material micro-capsule (adopting the preparation of industry common process) or from manufacturer's purchase phase-change material micro-capsule, as the raw material of next step processing;
(2) when highly heat-conductive material is selected metal powder, will be filled with nitrogen in the mixer to prevent metal powder generation dust explosion.Then according to formula rate phase-change material micro-capsule and highly heat-conductive material being put into mixer fully mixes;
(3) powder that mixes is put into tabletting machine, press forming under 15～400Mpa pressure.
Generally form setting operation pressure according to product strength demand and material, pressure range is generally 15～400MPa, can obtain the product of different stacking densities by adjusting pressure.
As preferably, in the process of step (2) batch mixing, when needs increase product tensile strength, in mixing process, add the tackiness agent of suitable proportion, it and phase-change material micro-capsule and highly heat-conductive material are mixed.
Advantage of the present invention:
1, easily manufactured, form easily large-scale production;
2, unit volume storage density high (suppress so that product density raises by high pressure, thereby the unit volume storage density is also raise);
3, thermal conductivity high (added the highly heat-conductive materials such as metal powder, steel fiber or scrap metal, improved the thermal conductivity of product);
Leakage problem (owing to adopt microcapsule that low-melting material is coated in the resistant to elevated temperatures capsule wall, when the phase change material of microcapsule inside melts, can not leak) can not occur in 4, product Heat stability is good;
5, the adaptation of product is good, can be applicable to various occasions;
6, the cost of material is low, as adopting the aluminium scrap bits as the material of increased thermal conductivity;
Therefore 7, product recoverable has reduced waste and on the impact of environment.
Description of drawings
Fig. 1 be in the embodiments of the invention 1 the phase-change material micro-capsule tap density with pressure history.
Fig. 2 is the sample drawing of embodiments of the invention 1 preparation.
Embodiment
Below by specific embodiment the present invention is described in further detail, but the present invention is not limited only to following examples.
Embodiment 1
The first step, the preparation phase-change material micro-capsule: the phase change material in the described phase-change material micro-capsule is octadecane, and the transformation temperature of this material is 28～31 ℃, and latent heat of phase change is 241.2kJ/kg, and thermal conductivity is 0.15W/mK, and density is 773kg/m
3It is prepared into the phase-change material micro-capsule that diameter is 100 nanometers～100 micron, and its latent heat of phase change is 160～210kJ/kg, and thermal conductivity is 0.15～0.2W/mK, and its loose bulk density is 350kg/m
3
Second step, combined phase-change material microcapsule and metal powder: described metal powder is aluminium powder (thermal conductivity is 202.4W/mK, and the aluminium powder particle diameter is 100 nanometers～20 micron).Take by weighing 5% aluminium powder and 95% phase-change material micro-capsule by massfraction, in the forward direction mixer that feeds intake, be filled with nitrogen and prevent dust explosion, then put it into shake in the mixer mixed; The control mixer shake frequency and mixing time, mix to two kinds of batchings.The batching sealing that mixes is saved backup.
In the 3rd step, by high-pressure forming device fabrication setting phase change energy storage material: the batching that will mix is carried out portioning according to the quality of product requirement, and puts into mould and carry out compressing tablet.Form setting operation pressure according to strength demand and material, present embodiment adopts the working pressure of 40MPa to carry out compressing tablet.Matrix material behind the compressing tablet is carried out the demoulding, make the composite shape-stabilized phase change energy storage material that dimensionally stable, heat storage capacity are high, thermal conductivity is good.
The material sample characteristic of present embodiment preparation: latent heat of phase change is 152～199.5kJ/kg, and thermal conductivity is 3.63W/mK, and tap density is 900kg/m
3Through 5000 storage/heat release loop tests, the shape of this sizing phase-change material still remains unchanged and does not leak, and heat storage capacity does not significantly reduce yet.
Embodiment 2
The first step, choose phase-change material micro-capsule suitable on the market: the phase-change material micro-capsule that present embodiment adopts is commercially available salt hydrate microcapsule (available from RUBITHERM technology company limited, Germany).The transformation temperature of these microcapsule is 29 ℃, and thermal conductivity is 0.5W/mK, and latent heat of phase change is 200～310kJ/kg, and loose bulk density is 525kg/m
3
Second step, combined phase-change material microcapsule, scrap metal and hot melt adhesive: described scrap metal is that (thermal conductivity is 387.6W/mK to copper scale, out-of-shape), take by weighing 5% copper scale, 80% phase-change material micro-capsule and 15% hot-melt adhesive powder by massfraction, put it into shake in the mixer mixed.The control mixer shake frequency and mixing time, mix to three kinds of batchings.The batching sealing that mixes is saved backup.
In the 3rd step, by high-pressure forming device fabrication setting phase change energy storage material: the batching that will mix is carried out portioning according to the quality of product requirement, and puts into mould and carry out compressing tablet.Form setting operation pressure according to strength demand and material, present embodiment adopts the working pressure of 16MPa to carry out compressing tablet.Matrix material behind the compressing tablet is carried out the demoulding, make the composite shape-stabilized phase change energy storage material that dimensionally stable, heat storage capacity are high, thermal conductivity is good.
The material sample characteristic of present embodiment preparation: latent heat of phase change is 160～248kJ/kg, and thermal conductivity is 2.52W/mK, and tap density is 1200kg/m
3Through 5000 storage/heat release loop tests, the shape of this sizing phase-change material still remains unchanged and does not leak, and heat storage capacity does not significantly reduce yet.
Embodiment 3
The first step, choose phase-change material micro-capsule suitable on the market: the phase-change material micro-capsule that present embodiment adopts is commercially available organic materials microcapsule (available from ShangHai WuJi Spinning Science Co., Ltd).The transformation temperature of these microcapsule is 22-25 ℃, and latent heat of phase change is 160kJ/kg, and thermal conductivity is 0.2W/mK, and loose bulk density is 355kg/m
3
Second step, combined phase-change material microcapsule and steel fiber: described steel fiber is that (thermal conductivity is 387.6W/mK to copper cash, and length is 5～10mm).Take by weighing 5% copper cash, 95% phase-change material micro-capsule by massfraction, put it into shake in the mixer mixed.The control mixer shake frequency and mixing time, mix to two kinds of batchings.The batching sealing that mixes is saved backup.
In the 3rd step, by high-pressure forming device fabrication setting phase change energy storage material: the batching that will mix is carried out portioning according to the quality of product requirement, and puts into mould and carry out compressing tablet.Form setting operation pressure according to strength demand and material, present embodiment adopts the working pressure of 18MPa to carry out compressing tablet.Matrix material behind the compressing tablet is carried out the demoulding, make the composite shape-stabilized phase change energy storage material that dimensionally stable, heat storage capacity are high, thermal conductivity is good.
The material sample characteristic of present embodiment preparation: latent heat of phase change is 152kJ/kg, and thermal conductivity is 2.22W/mK, and tap density is 814kg/m
3Through 5000 storage/heat release loop tests, the shape of this sizing phase-change material still remains unchanged and does not leak, and heat storage capacity does not significantly reduce yet.
Embodiment 4
The first step, choose phase-change material micro-capsule suitable on the market: the phase-change material micro-capsule that present embodiment adopts is commercially available organic materials microcapsule (available from ShangHai WuJi Spinning Science Co., Ltd).The transformation temperature of these microcapsule is 22-25 ℃, and thermal conductivity is 0.2W/mK, and latent heat of phase change is 160kJ/kg, and loose bulk density is 355kg/m
3
Second step, combined phase-change material microcapsule, steel fiber and latex powder: described steel fiber is that (thermal conductivity is 202.4W/mK to aluminum fiber, length is 6～8mm), take by weighing 8% aluminum fiber, 82% phase-change material micro-capsule and 10% latex powder by massfraction, put it into shake in the mixer mixed.The control mixer shake frequency and mixing time, mix to three kinds of batchings.The batching sealing that mixes is saved backup.
In the 3rd step, by high-pressure forming device fabrication setting phase change energy storage material: the batching that will mix is carried out portioning according to the quality of product requirement, and puts into mould and carry out compressing tablet.Form setting operation pressure according to strength demand and material, present embodiment adopts the working pressure of 20MPa to carry out compressing tablet.Matrix material behind the compressing tablet is carried out the demoulding, make the composite shape-stabilized phase change energy storage material that dimensionally stable, heat storage capacity are high, thermal conductivity is good.
The material sample characteristic of present embodiment preparation: latent heat of phase change is 131.2kJ/kg, and thermal conductivity is 5.81W/mK, and tap density is 830kg/m
3Through 5000 storage/heat release loop tests, the shape of this sizing phase-change material still remains unchanged and does not leak, and heat storage capacity does not significantly reduce yet.
As can be seen from the above embodiments, setting phase change energy storage material of the present invention has higher thermal conductivity than existing phase change material.The thermal conductivity of existing inorganic or organic phase change material is generally between 0.15～0.5W/mK, and the thermal conductivity of phase change material of the present invention is between 2.22～5.81W/mK, so relatively existing above-mentioned phase change material phase change material thermal conductivity of the present invention is high.High conductive fixed phase change heat material of the present invention is a kind of good heat-storage medium, has broad application prospects in fields such as building energy conservation and industrial energy savings.
Claims (2)
1. setting phase change energy storage material with high-thermal conductivity, it is characterized in that: this material is comprised of by the different mass mark following composition: phase-change material micro-capsule 80%～82%, highly heat-conductive material 5%～10%, tackiness agent 10%～15%, phase change material in the described phase-change material micro-capsule is organic materials or inorganic materials, and described highly heat-conductive material is steel fiber or scrap metal; Described tackiness agent is powdery, and tackiness agent is one or more in latex, the hot melt adhesive.
2. the manufacture method of setting phase change energy storage material with high-thermal conductivity according to claim 1, it is characterized in that: preparation process is as follows:
(1) selects phase change material with high heat storage ability, make phase-change material micro-capsule or from manufacturer's purchase phase-change material micro-capsule, as the raw material of next step processing;
(2) according to formula rate phase-change material micro-capsule and highly heat-conductive material steel fiber or scrap metal, tackiness agent are put into mixer and fully mixed;
(3) powder of step (2) gained that mixes is put into tabletting machine, press forming under 15～400MPa pressure.
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| CN102877553B (en) * | 2012-10-17 | 2014-05-07 | 肖和平 | Energy storage thermal insulation building material |
| CN103773322A (en) * | 2014-02-08 | 2014-05-07 | 中国电子科技集团公司第三十三研究所 | Phase change microcapsule heat conduction material and preparation method thereof |
| CN103849356A (en) * | 2014-03-20 | 2014-06-11 | 中国电子科技集团公司第三十三研究所 | Electrical insulating phase-change heat conducting material and preparation method thereof |
| CN105916350B (en) * | 2016-04-29 | 2018-05-29 | 广东欧珀移动通信有限公司 | A kind of terminal device and associated method |
| CN105873357B (en) * | 2016-04-29 | 2019-03-01 | Oppo广东移动通信有限公司 | Circuit board and mobile terminal |
| CN108553243A (en) * | 2017-12-29 | 2018-09-21 | 珠海富伊特科技有限公司 | A kind of medical child-bearing thermostatic protectiving incubator |
| CN112442337A (en) * | 2019-08-29 | 2021-03-05 | 张立强 | Resin type phase change energy storage material and preparation method thereof |
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