CN1369537A - Process for preparing shaped phase change material - Google Patents
Process for preparing shaped phase change material Download PDFInfo
- Publication number
- CN1369537A CN1369537A CN 02104340 CN02104340A CN1369537A CN 1369537 A CN1369537 A CN 1369537A CN 02104340 CN02104340 CN 02104340 CN 02104340 A CN02104340 A CN 02104340A CN 1369537 A CN1369537 A CN 1369537A
- Authority
- CN
- China
- Prior art keywords
- paraffin
- change material
- phase change
- phase
- heating temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000012782 phase change material Substances 0.000 title claims abstract description 38
- 238000004519 manufacturing process Methods 0.000 title abstract 2
- 239000000463 material Substances 0.000 claims abstract description 20
- 238000001816 cooling Methods 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000004743 Polypropylene Substances 0.000 claims abstract description 5
- 229920001155 polypropylene Polymers 0.000 claims abstract description 5
- 229920001083 polybutene Polymers 0.000 claims abstract description 4
- 229920000573 polyethylene Polymers 0.000 claims abstract description 3
- 239000012188 paraffin wax Substances 0.000 claims description 41
- 238000010438 heat treatment Methods 0.000 claims description 17
- 238000007493 shaping process Methods 0.000 claims description 17
- 239000000203 mixture Substances 0.000 claims description 14
- 238000002360 preparation method Methods 0.000 claims description 12
- 229920003023 plastic Polymers 0.000 claims description 11
- 239000004033 plastic Substances 0.000 claims description 11
- 229920000098 polyolefin Polymers 0.000 claims description 8
- -1 polyethylene Polymers 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 5
- 238000010298 pulverizing process Methods 0.000 claims description 5
- 238000010074 rubber mixing Methods 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 3
- 239000004698 Polyethylene Substances 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 abstract 2
- 239000012071 phase Substances 0.000 description 20
- 229920001903 high density polyethylene Polymers 0.000 description 14
- 239000004700 high-density polyethylene Substances 0.000 description 14
- 230000009466 transformation Effects 0.000 description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 229910002804 graphite Inorganic materials 0.000 description 6
- 239000010439 graphite Substances 0.000 description 6
- 229920000468 styrene butadiene styrene block copolymer Polymers 0.000 description 4
- 239000002775 capsule Substances 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 229920001684 low density polyethylene Polymers 0.000 description 2
- 239000004702 low-density polyethylene Substances 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 239000001993 wax Substances 0.000 description 2
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910001960 metal nitrate Inorganic materials 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Abstract
A process for preparing a form-fixed phase change material includes plasticizing olefine polymer (10-50 wt.%) to become chips, gradually adding paraffine until its content is 90-50 wt%, breaking, smelting-extruding out, water cooling and baking. The said polymer may be at least one of polyethene, polypropene, polybutene, etc. The resultant material features 25-70 deg.c for phase-changing temp, high phase-changing enthalpy up to 175 KJ/kg and no molecular leakage.
Description
Technical field
The present invention relates to a kind of preparation method of phase change material, particularly a kind of is the preparation method of the shaping phase-change material of raw material with paraffin and olefin polymer.
Background technology
Utilize the latent heat of phase change material to carry out the storage or the release of heat energy, can produce the facility of various raising energy utilization rates, simultaneously, utilize the characteristic of phase change material temperature approximately constant when phase transformation, can reach the purpose of controlled temperature.Therefore in energy resource supply gradually nervous today, the application of phase change material can be alleviated the contradiction of energy availability and demand greatly.This class material has been widely used in civil and military fields such as sun power utilization, waste heat waste heat recovery, intelligent automatic air-conditioning and construction thing, glasshouse, phase-changing energy-storing type air-conditioning, electrical equipment constant temperature, insulation clothes, energy storage cooker at present, and range of application constantly enlarges.
Phase change material commonly used is to carry out the storage of energy and release by solid-liquid phase change, because material is liquid during energy storage, the container sealing encapsulation must be arranged, not only leak easily, but also increased thermal resistance between heat-transfer medium and phase change material, and cost also can correspondingly improve, and makes traditional phase change material have certain difficulty applying of sun power utilization and building field.
In 0-100 degree centigrade of scope, traditional solid-liquid phase change material mostly is the crystalline hydrate salt, as CaCl
26H
2O, Na
2SO
410H
2O.As patent " phase change material and its preparation method with inhibitor " (publication number 1270201) employing is the composition of metal nitrate and water.This class phase change material needs encapsulation when using, not only leak easily, but also increased thermal resistance between heat-transfer medium and phase change material, and cost also has corresponding raising.
Japan has carried out research earlier aspect shaping phase-change material, professor Inaba of day own job mountain university wait (Heat andMass Transfer, 32 (1997), p307) studied the heat physical properties of paraffin and high density polyethylene(HDPE) system.In the shaping phase-change material that they adopted, the content of paraffin is 74wt%, and fusing point is 54 ℃, and enthalpy of phase change is 121.4kJ/kg (enthalpy of phase change of paraffin refined wax is 164kJ/kg).
France people such as Xavier Py (Inter.J.Heat and Transfer, 44 (2001), p2727) with expanded graphite as propping material, prepared paraffin-expanded graphite shaping phase-change material, and studied the heat physical properties of system.The paraffin melting point that they adopted is respectively 70-80 ℃, and 18.1 ℃ and-9 ℃, content is 65-95wt%.They put into the aluminum cube mold with expanded graphite, are pressed onto different densities (50-350kg/m with different pressures
3), then the graphite block that presses is immersed in the fused paraffin, no longer increase until weight.The thermal conductivity of the shaping phase-change material that makes like this can reach 4-70Wm
-1K
-1Result to enthalpy of phase change does not report.
Grand and Ge Xinshi (the Solar Evergy Materials and Solar Cells of leaf of heat energy system of Chinese University of Science and Technology, 64 (2000), p37) prepared paraffin-high density polyethylene(HDPE) shaping phase-change material, the content of paraffin is 70-75wt%, fusing point is 58-62 ℃, and enthalpy of phase change can reach 157kJ/kg (enthalpy of phase change of paraffin refined wax is 199kJ/kg).They are at first with paraffin and high density polyethylene(HDPE) fusion, then after under the temperature that is higher than the high density polyethylene(HDPE) fusing point the two being mixed, allow the mixture cooling.
The Xiao Min of South China Science ﹠ Engineering University and Gong Kecheng (solar energy journal, 22 (2001), p247) prepared paraffin-SBS (styrene-butadiene-styrene triblock copolymer) shaping phase-change material, the content of paraffin is 20-80wt%, fusing point 56-58 ℃, enthalpy of phase change can reach 165.2kJ/kg.Concrete grammar is on two roller warm-up mills, under 100 ℃ paraffin is slowly added among the SBS, mixes heat refining and forms.In order to improve the heat conductivility of material, also add the expanded graphite after handling on a small quantity.
In prior art, a class is to adopt paraffin and high density polyethylene(HDPE) to prepare shaping phase-change material, and wherein the transformation temperature of paraffin is single, and paraffinicity is no more than 75%, and enthalpy of phase change is up to 157kJ/kg; Second class is to be phase change material with paraffin, adopts SBS as propping material, and the transformation temperature of paraffin is single, and content can reach 80%, and enthalpy of phase change also has corresponding raising, reaches 165.2kJ/kg; The 3rd class is phase change material with paraffin, and the employing expanded graphite is a propping material, its objective is the thermal conductivity that improves shaping phase-change material.
Summary of the invention
The purpose of this invention is to provide a kind of difficult leakage, nontoxic, need not to encapsulate the preparation method of the shaping phase-change material that can directly use, reach the adjustable of transformation temperature by the paraffin of selecting to have different melting points.
The preparation method of a kind of shaping phase-change material that the present invention proposes is a raw material with phase change material paraffin and propping material, and it is characterized in that: this method may further comprise the steps successively:
(1) 10-50wt% propping material olefin polymer is plasticated in rubber mixing machine in flakes, between room temperature-40 ℃, add paraffin gradually, content until paraffin reaches 90-50wt%, and is mixing to evenly, and wherein olefin polymer is at least a in polyethylene, polypropylene, the polybutene;
(2) mixture is pulverized in plastic crusher;
(3) mixture after will pulverizing joins in the plastics extruder, and it is 90-150 ℃ that Heating temperature is set at the barrel Heating temperature respectively, and the screw portion Heating temperature is 100-160 ℃, and a mouthful mould Heating temperature is 90-150 ℃, melt extrudes;
(4) melt of extruding is dried after water cooling be shaping phase-change material.
In above-mentioned preparation method, described phase change material paraffin is any in paraffin wax, SEMI-REFINED PARAFFIN WAX or the paraffin wax fully refined.
In above-mentioned preparation method, described phase change material is the paraffin of fusing point between 25-70 ℃.
Adopt the shaping phase-change material of the present invention's preparation, phase transition process is reversible, transformation temperature 25-70 ℃ adjustable, the enthalpy of phase change maximum can reach 175kJ/kg, material keeps solid state before and after phase transformation, no small molecules leaks, and need not to encapsulate, and can directly use.
Because the present invention selects a series of paraffin with different melting points for use, thereby transformation temperature is adjustable.The present invention is when adopting high density polyethylene(HDPE) to be propping material, and the content of paraffin can reach 90%, and enthalpy of phase change can reach 174.8kJ/kg; In addition, the present invention has also adopted multiple propping materials such as new LDPE (film grade), polypropylene, polybutene, provides multiple choices from cost and the angle that is easy to get, and the possibility of selecting is provided for the requirement that adapts to different purposes.
Embodiment
The present invention is a raw material with paraffin and olefin polymer, mixes with certain mass ratio 50-90wt% phase change material paraffin and 50-10wt% propping material olefin polymer.Wherein olefin polymer plays setting and sealing function for the capsule material, paraffin is core, the capsule material is encapsulated in wherein core is little, because it is solid-state that working temperature section capsule material keeps, core undergoes phase transition, though therefore the core phase transformation can absorb or emit a large amount of heat in the whole mixture, the mixture shape remains unchanged.
The transformation temperature of shaping phase-change material and enthalpy of phase change are measured can adopt differential scanning calorimeter (DSC), at N
2Protection down; 5 ℃/min of temperature rise rate, the measurement temperature range is a room temperature-200 ℃, the temperature that records the summit correspondence of main endotherm(ic)peak is transformation temperature; between the starting temperature and final temperature at peak, the endotherm(ic)peak heat corresponding with the area that baseline surrounds is enthalpy of phase change.
Embodiment 1
(1) two roll rubber mixing mill is heated to about 80 ℃, earlier new LDPE (film grade) is plasticated in flakes, between room temperature-40 ℃, add the #60 SEMI-REFINED PARAFFIN WAX gradually again, reach 20/80 until the two ratio, mixing even.
(2) mixture is pulverized in plastic crusher.
(3) mixture after will pulverizing joins in the plastics extruder, sets the barrel Heating temperature and is respectively 90 ℃, and the screw portion Heating temperature is 100 ℃, and a mouthful mould Heating temperature is 90 ℃, and screw speed is 25-30r/min.
(4) melt of extruding is dried after water cooling.
Recording transformation temperature is 60.18 ℃, and enthalpy of phase change is 144.4kJ/kg.
Embodiment 2
(1) two roll rubber mixing mill is heated to about 100 ℃, earlier polypropylene plastics is smelt sheet, between room temperature-40 ℃, add the #48 paraffin wax gradually again, reach 50/50 until the two ratio, mixing evenly.
(2) mixture is pulverized in plastic crusher.
(3) mixture after will pulverizing joins in the plastics extruder, sets the barrel Heating temperature and is respectively 150 ℃, and the screw portion Heating temperature is 160 ℃, and a mouthful mould Heating temperature is 150 ℃, and screw speed is 25-30r/min.
(4) melt of extruding is dried after water cooling.
Recording transformation temperature is 50.72 ℃, and enthalpy of phase change is 79.57kJ/kg.
Embodiment 3
(1) two roll rubber mixing mill is heated to about 80 ℃, earlier high density polyethylene(HDPE) is plasticated in flakes, between room temperature-40 ℃, add the #60 SEMI-REFINED PARAFFIN WAX gradually again, reach 10/90 until the two ratio, mixing even.
(2) mixture is pulverized in plastic crusher.
(3) mixture after will pulverizing joins in the plastics extruder, sets the barrel Heating temperature and is respectively 120 ℃, and the screw portion Heating temperature is 130 ℃, and a mouthful mould Heating temperature is 120 ℃, and screw speed is 25-30r/min.
(4) melt of extruding is dried after water cooling.
Recording transformation temperature is 60.54 ℃, and enthalpy of phase change is 174.8kJ/kg.
Claims (3)
1, a kind of preparation method of shaping phase-change material is a raw material with phase change material paraffin and propping material, and it is characterized in that: this method may further comprise the steps successively:
(1) 10-50wt% propping material olefin polymer is plasticated in rubber mixing machine in flakes, between room temperature-40 ℃, add paraffin gradually, content until paraffin reaches 90-50wt%, and is mixing to evenly, and wherein olefin polymer is at least a in polyethylene, polypropylene, the polybutene;
(2) mixture is pulverized in plastic crusher;
(3) mixture after will pulverizing joins in the plastics extruder, and it is 90-150 ℃ that Heating temperature is set at the barrel Heating temperature respectively, and the screw portion Heating temperature is 100-160 ℃, and a mouthful mould Heating temperature is 90-150 ℃, melt extrudes;
(4) melt of extruding is dried after water cooling be shaping phase-change material.
2, according to the described preparation method of claim 1, it is characterized in that: described phase change material paraffin is any in paraffin wax, SEMI-REFINED PARAFFIN WAX or the paraffin wax fully refined.
3,, it is characterized in that described phase change material is the paraffin of fusing point between 25-70 ℃ according to the described preparation method of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02104340 CN1369537A (en) | 2002-03-01 | 2002-03-01 | Process for preparing shaped phase change material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02104340 CN1369537A (en) | 2002-03-01 | 2002-03-01 | Process for preparing shaped phase change material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1369537A true CN1369537A (en) | 2002-09-18 |
Family
ID=4740073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02104340 Pending CN1369537A (en) | 2002-03-01 | 2002-03-01 | Process for preparing shaped phase change material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1369537A (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100341973C (en) * | 2004-09-28 | 2007-10-10 | 北京巨龙博方科学技术研究院 | Process for preparing phase change energy-storage material(PCM) |
| CN101278029A (en) * | 2005-10-06 | 2008-10-01 | 卡普佐国际有限公司 | Polymer composition containing a heat accumulating phase change material, a process for producing such a composition and a product in which such a composition included |
| CN101943505A (en) * | 2009-12-22 | 2011-01-12 | 中国科学技术大学 | Heat-accumulating condenser using shape-stabilized phase change material |
| CN102040948A (en) * | 2010-11-24 | 2011-05-04 | 北京精诚博桑科技有限公司 | Temperature control material, thermal-insulation device made thereof, and production method of device |
| CN101423749B (en) * | 2007-11-01 | 2011-06-01 | 中国人民解放军军事医学科学院野战输血研究所 | Fixed shape phase-change material based on tetradecane and method for producing the same |
| CN104036866A (en) * | 2014-06-27 | 2014-09-10 | 国家电网公司 | Phase-change temperature-control type high-voltage cable |
| CN104163930A (en) * | 2013-05-20 | 2014-11-26 | 北京化工大学 | Preparation method of phase change energy storage composite material |
| CN104848451A (en) * | 2015-05-14 | 2015-08-19 | 北京化工大学 | Novel indoor solar phase-change temperature regulating system |
| CN106905927A (en) * | 2015-12-23 | 2017-06-30 | 上海邦中高分子材料有限公司 | A kind of composite shape-setting phase-change material and preparation method |
| CN107936930A (en) * | 2017-11-30 | 2018-04-20 | 中国科学院大连化学物理研究所 | A kind of preparation method of organic polymer shaped composite phase-change material |
| CN108570177A (en) * | 2018-04-04 | 2018-09-25 | 上海六立纳米材料科技有限公司 | With the self-temperature-regulating polyolefin particles and preparation method thereof of expanded graphite supporting jelly phase change paraffin |
| CN109124865A (en) * | 2018-10-09 | 2019-01-04 | 上海暖友实业有限公司 | A kind of constant temperature phase transformation sheet type spontaneous heating body and preparation method thereof |
| CN110903516A (en) * | 2019-11-29 | 2020-03-24 | 福建俊榕能源有限公司 | High-strength high-toughness flame-retardant polypropylene composite material and preparation method thereof |
| CN113414869A (en) * | 2021-06-07 | 2021-09-21 | 中建材创新科技研究院有限公司 | Phase-change building material product with temperature control performance and preparation method thereof |
-
2002
- 2002-03-01 CN CN 02104340 patent/CN1369537A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100341973C (en) * | 2004-09-28 | 2007-10-10 | 北京巨龙博方科学技术研究院 | Process for preparing phase change energy-storage material(PCM) |
| CN101278029A (en) * | 2005-10-06 | 2008-10-01 | 卡普佐国际有限公司 | Polymer composition containing a heat accumulating phase change material, a process for producing such a composition and a product in which such a composition included |
| CN101423749B (en) * | 2007-11-01 | 2011-06-01 | 中国人民解放军军事医学科学院野战输血研究所 | Fixed shape phase-change material based on tetradecane and method for producing the same |
| CN101943505A (en) * | 2009-12-22 | 2011-01-12 | 中国科学技术大学 | Heat-accumulating condenser using shape-stabilized phase change material |
| CN102040948A (en) * | 2010-11-24 | 2011-05-04 | 北京精诚博桑科技有限公司 | Temperature control material, thermal-insulation device made thereof, and production method of device |
| CN102040948B (en) * | 2010-11-24 | 2013-11-06 | 北京精诚博桑科技有限公司 | Temperature control material, thermal-insulation device made thereof, and production method of device |
| CN104163930A (en) * | 2013-05-20 | 2014-11-26 | 北京化工大学 | Preparation method of phase change energy storage composite material |
| CN104036866A (en) * | 2014-06-27 | 2014-09-10 | 国家电网公司 | Phase-change temperature-control type high-voltage cable |
| CN104848451A (en) * | 2015-05-14 | 2015-08-19 | 北京化工大学 | Novel indoor solar phase-change temperature regulating system |
| CN106905927A (en) * | 2015-12-23 | 2017-06-30 | 上海邦中高分子材料有限公司 | A kind of composite shape-setting phase-change material and preparation method |
| CN107936930A (en) * | 2017-11-30 | 2018-04-20 | 中国科学院大连化学物理研究所 | A kind of preparation method of organic polymer shaped composite phase-change material |
| CN108570177A (en) * | 2018-04-04 | 2018-09-25 | 上海六立纳米材料科技有限公司 | With the self-temperature-regulating polyolefin particles and preparation method thereof of expanded graphite supporting jelly phase change paraffin |
| CN109124865A (en) * | 2018-10-09 | 2019-01-04 | 上海暖友实业有限公司 | A kind of constant temperature phase transformation sheet type spontaneous heating body and preparation method thereof |
| CN110903516A (en) * | 2019-11-29 | 2020-03-24 | 福建俊榕能源有限公司 | High-strength high-toughness flame-retardant polypropylene composite material and preparation method thereof |
| CN113414869A (en) * | 2021-06-07 | 2021-09-21 | 中建材创新科技研究院有限公司 | Phase-change building material product with temperature control performance and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1269932C (en) | Mineral wax composite shape-setting phase-change material and process for preparation | |
| CN1369537A (en) | Process for preparing shaped phase change material | |
| Lu et al. | Bio-based poly (lactic acid)/high-density polyethylene blends as shape-stabilized phase change material for thermal energy storage applications | |
| US5565132A (en) | Thermoplastic, moldable, non-exuding phase change materials | |
| CN101709104B (en) | Three-dimensional gel network carrier and form-stable phase change composite material | |
| CN104371666A (en) | Preparation method of high-thermal-conductivity low-leakage phase-change composite | |
| IL292652A (en) | Flexible multi-level phase change material having cross-linked network structure and preparation method therefor | |
| CN103980863B (en) | A kind of side chain liquid crystalline polymer composite shape-setting phase-change material and preparation method thereof | |
| CN1228101A (en) | High density polyethylene films with improved barrier | |
| CN102020859A (en) | Modified asphalt composition with creeping characteristic and preparation method thereof | |
| CN102492396B (en) | Multi-element composite solid-solid phase-change material and preparation method thereof | |
| CN102070845A (en) | Phase change energy storage thermoplastic composite material and preparation method thereof | |
| CN1462787A (en) | Material for storing heat and supplying heat for building generated shaped phase change by heating and its preparation method | |
| CN100573738C (en) | The preparation method of layered polymer matrix PTC material | |
| CN101565606A (en) | Polymer solid-solid phase transition energy storage material and preparation method thereof | |
| CN109503926A (en) | A kind of preparation method of composite barrier material | |
| CN1482204A (en) | Energy-accumulating temp-controlled thermoplastic cross-link high-molecular composite material with solid-solid phase change and its preparing process | |
| CN107267122A (en) | A kind of production technology for phase-change accumulation energy module of shaping | |
| CN104645907B (en) | A kind of preparation method of heat cross-linked type nanometer wax phase change energy storage capsule | |
| CN112778979A (en) | High-thermal-conductivity polymer-shaped composite phase-change material and preparation method thereof | |
| CN106905927A (en) | A kind of composite shape-setting phase-change material and preparation method | |
| CN102516951B (en) | Photopolymerization solid-solid energy storage phase-change material and preparation method thereof | |
| CN107987370A (en) | A kind of high intensity rotational moulding polyethylene mixture and preparation method thereof | |
| CN101402765A (en) | Method for producing polythene/polystyrene alloy with capacity increasing of reaction in-situ | |
| CN100341973C (en) | Process for preparing phase change energy-storage material(PCM) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |