CN100467565C - Method of preparing organic molecular alloy phase change energy storage material - Google Patents
Method of preparing organic molecular alloy phase change energy storage material Download PDFInfo
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- CN100467565C CN100467565C CNB200510026226XA CN200510026226A CN100467565C CN 100467565 C CN100467565 C CN 100467565C CN B200510026226X A CNB200510026226X A CN B200510026226XA CN 200510026226 A CN200510026226 A CN 200510026226A CN 100467565 C CN100467565 C CN 100467565C
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Abstract
The invention relates to phase change energy storage material manufacturing method field. The method includes the following steps: preparing proper mixture; keeping it at 80-100 centigrade degree for 1-4 hours; shaking for 1-5 minutes with 40-50 kHz ultrasonic; controlling the temperature at 50-80 centigrade degree; and testing the phase change temperature and heat. The formed material has adjustable phase change temperature and high phase change heat.
Description
Technical field
The invention belongs to the thermal energy storage technical field, particularly the preparation method field of phase-changing energy storage material.
Background technology
Phase-changing energy storage material utilizes material neither endothermic nor exothermic in phase transition process to come storage power or releases energy, and has characteristics such as the approximate isothermal of storage density height, heat accumulation heat release, process be easy to control.The kind of phase-changing energy storage material is a lot, can be divided into by the mode of phase transformation that solid-solid phase transition material, solid-liquid phase change material, solid-gas phase become material, liquid-gas phase becomes material etc.; Moiety by material can be divided into mineral-type and organic class (comprising the high score subclass) phase-changing energy storage material.
Organic class phase change material is commonly used paraffin, lipid acid or its ester class, alcohols, arene, fragrant ketone, amides etc.The advantage of organic class phase change material is that formability better, generally is not easy to occur surfusion and is separated when solid state, and the corrodibility of material is less, and performance is more stable, and toxicity is little, cost is low; Energy storage capacity little, the less unit volume of density is less thereby shortcoming is a thermal conductivity, and fusing point is lower, be unsuitable for using in the high temperature occasion, and volatile, easy firing even blast or worn out by airborne oxygen slow oxidation.
Summary of the invention
The objective of the invention is to propose the preparation method of a kind of transformation temperature organic molecular alloy phase change energy storage material adjustable, that heat of phase transformation is bigger.
Because the phase transformation performance of organic molecule alloy is different with the phase transformation performance of single component, therefore, can be by regulating different components and proportioning to obtain the phase change material of a series of different transformation temperatures and heat of phase transformation.The method that the present invention adopts soak to combine with vibration of ultrasonic wave, and utilize modern thermoanalysis technology, by a series of examination proportioning mixtures are carried out hot analytical test, study the thermal characteristics of different proportioning organic molecular alloy phase change materials, get examination proportioning, thereby prepare the satisfactory organic molecular alloy phase change energy storage material of performance with single-phase alternating temperature degree and maximal phase heating.
The preparation method of organic molecular alloy phase change energy storage material of the present invention, its step is as follows:
A, the preparation of examination proportioning mixture: set a series of examination proportionings by suitable proportioning spacing,, make examination proportioning mixture by setting examination proportioning weighing organic phase change material;
B, soak: the examination proportioning mixture that step a is obtained kept 1～4 hour in 80～100 ℃ of constant temperature;
C, vibration of ultrasonic wave: the product vibration of ultrasonic wave that step b is obtained 1～5 minute, ultrasonic frequency 40～50 kilohertzs, temperature is controlled at 50～80 ℃;
D, utilize the transformation temperature and the heat of phase transformation of the organic phase change material of the different examination of thermoanalysis technology test proportionings, getting the organic molecular alloy phase change energy storage material with single-phase alternating temperature degree and maximal phase heating examination proportioning is target product.
The preparation method of organic molecular alloy phase change energy storage material of the present invention, wherein the described thermoanalysis technology of step a is meant differential scanning calorimetric (DSC) analytical technology; Organic phase change material can be two or more the material in alkane, lipid acid and the derivative thereof, as tetradecanoic acid, palmitinic acid, stearic acid, butyl stearate, lauryl alcohol, and tetradecyl alcohol, hexadecanol, docosane, hexacosane etc.
Beneficial effect of the present invention: the preparation method who utilizes organic molecular alloy phase change energy storage material of the present invention, multiple different organic phase change material can be combined, the different proportionings of regulating the different components of molecular alloy and identical component by modern thermoanalysis technology can obtain the phase change material of different transformation temperatures, the method that adopts soak to combine with vibration of ultrasonic wave is again prepared organic molecular alloy phase change energy storage material that occurring in nature does not have, that transformation temperature is adjustable, heat of phase transformation is bigger.
Description of drawings
Fig. 1 is the DSC curve of the machine molecular alloy phase-changing energy storage material that makes of embodiment 1.
Fig. 2 is the DSC curve of the machine molecular alloy phase-changing energy storage material that makes of embodiment 2.
Fig. 3 is the DSC curve of the machine molecular alloy phase-changing energy storage material that makes of embodiment 3.
Embodiment
Embodiment 1
With chemical pure n-caprylic acid, lauric acid as raw material.Setting examination proportioning (mol ratio) series is n-caprylic acid: lauric acid=5:95,10:90,15:85,20:80,25:75,30:70,35:65,40:60,45:55,50:50,55:45,60:40,65:35,70:30,75:25,80:20,85:15,90:10,95:5.Examination proportioning mixture is incubated 4 hours in 80 ℃ constant temperature insulating container, the water-bath of then test tube being put into ultrasonic generator, the temperature of control water-bath is 60 ℃, and the ultrasonic vibration time is 3 minutes, and ultrasonic frequency is 40～50 kilohertzs.Through above-mentioned series examination proportioning mixture is carried out hot analytical test, get examination proportioning with single-phase alternating temperature degree and maximal phase heating, determine that the target proportioning is n-caprylic acid: lauric acid=80:20 (mol ratio), the DSC test result of this molecular alloy is seen Fig. 1.
With chemical pure n-caprylic acid, palmitinic acid as raw material.Setting examination proportioning (mol ratio) series is n-caprylic acid: palmitinic acid=5:95,10:90,15:85,20:80,25:75,30:70,35; 65,40:60,45:55,50:50,55:45,60:40,65:35,70:30,75:25,80:20,85:15,90:10,95:5.Examination proportioning mixture is incubated 2.5 hours in 90 ℃ constant temperature insulating container, the water-bath of then test tube being put into ultrasonic generator, the temperature of control water-bath is 50 ℃, and the ultrasonic vibration time is 5 minutes, and ultrasonic frequency is 40～50 kilohertzs.Through above-mentioned series examination proportioning mixture is carried out hot analytical test, get examination proportioning with single-phase alternating temperature degree and maximal phase heating, determine that the target proportioning is n-caprylic acid: palmitinic acid=95:5 (mol ratio), the DSC test result of this molecular alloy is seen Fig. 2.
Embodiment 3
With chemical pure capric acid, tetradecanoic acid as raw material.Setting examination proportioning (mol ratio) series is capric acid: tetradecanoic acid=5:95,10:90,15:85,20:80,25:75,30:70,35:65,40:60,45:55,50:50,55:45,60:40,65:35,70:30,75:25,80:20,85:15,90:10,95:5.Examination proportioning mixture is incubated 1 hour in 100 ℃ constant temperature insulating container, the water-bath of then test tube being put into ultrasonic generator, the temperature of control water-bath is 80 ℃, and the ultrasonic vibration time is 1 minute, and ultrasonic frequency is 40～50 kilohertzs.Through above-mentioned series examination proportioning mixture is carried out hot analytical test, get examination proportioning with single-phase alternating temperature degree and maximal phase heating, determine that the target proportioning is capric acid: tetradecanoic acid=75:25 (mol ratio), the DSC test result of this molecular alloy is seen Fig. 3.
By the DSC test result of above embodiment and organic molecule alloy as seen, utilize the preparation method of organic molecular alloy phase change energy storage material of the present invention can obtain the original non-existent phase change material of occurring in nature, and can obtain the phase change material of needed specified temp in the practical application, also guarantee to have higher heat of phase transformation simultaneously.
Claims (5)
1, a kind of preparation method of organic molecular alloy phase change energy storage material, its step is as follows:
A, the preparation of examination proportioning mixture: set a series of examination proportionings, by setting examination proportioning weighing organic phase change material, make examination proportioning mixture, wherein, organic phase change material is selected from two kinds in tetradecanoic acid, palmitinic acid, capric acid, n-caprylic acid or the lauric acid;
B, soak: the examination proportioning mixture that step a is obtained kept 1～4 hour in 80～100 ℃ of constant temperature;
C, vibration of ultrasonic wave: the product vibration of ultrasonic wave that step b is obtained 1～5 minute, ultrasonic frequency 40～50 kilohertzs, temperature is controlled at 50～80 ℃;
D, utilize the transformation temperature and the heat of phase transformation of the organic phase change material of the different examination of thermoanalysis technology test proportionings, getting the organic molecular alloy phase change energy storage material with single-phase alternating temperature degree and maximal phase heating examination proportioning is target product.
2, the preparation method of organic molecular alloy phase change energy storage material as claimed in claim 1 is characterized in that the said thermoanalysis technology of steps d is meant the differential scanning calorimetric analysis technology.
3, the organic molecular alloy phase change energy storage material that makes by the described preparation method of claim 1 is made up of n-caprylic acid and lauric acid, and wherein, n-caprylic acid: lauric mol ratio is 80:20.
4, the organic molecular alloy phase change energy storage material that makes by the described preparation method of claim 1 is made up of n-caprylic acid and palmitinic acid, and wherein, n-caprylic acid: the mol ratio of palmitinic acid is 95:5.
5, the organic molecular alloy phase change energy storage material that makes by the described preparation method of claim 1 is made up of capric acid and tetradecanoic acid, and wherein, capric acid: the mol ratio of tetradecanoic acid is 75:25.
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| CN103031114A (en) * | 2012-05-03 | 2013-04-10 | 华东理工大学 | High-thermal-conductivity composite phase change energy storage microcapsules used at normal temperature and preparation method thereof |
| CN104644323A (en) * | 2015-01-27 | 2015-05-27 | 广州医科大学附属第一医院 | Cooling head sleeve |
| CN105838332A (en) * | 2016-03-31 | 2016-08-10 | 中国民航大学 | Low-temperature phase-change energy-storage material and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19813562A1 (en) * | 1997-05-21 | 1998-11-26 | Schuemann Sasol Gmbh & Co Kg | Latent heat body |
| CN1429261A (en) * | 2000-05-19 | 2003-07-09 | 法国石油研究所 | Method for making quasi-incompressible phase-change material with low thermal conductivity, and resulting product |
| CN1594192A (en) * | 2004-07-15 | 2005-03-16 | 南京大学 | Energy storage building material and preparing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19813562A1 (en) * | 1997-05-21 | 1998-11-26 | Schuemann Sasol Gmbh & Co Kg | Latent heat body |
| CN1429261A (en) * | 2000-05-19 | 2003-07-09 | 法国石油研究所 | Method for making quasi-incompressible phase-change material with low thermal conductivity, and resulting product |
| CN1594192A (en) * | 2004-07-15 | 2005-03-16 | 南京大学 | Energy storage building material and preparing method thereof |
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