CN110066643A - A kind of eutectic point binary inorganic/expanded graphite phase-changing energy storage material and method - Google Patents
A kind of eutectic point binary inorganic/expanded graphite phase-changing energy storage material and method Download PDFInfo
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Abstract
The invention discloses a kind of eutectic point binary inorganic/expanded graphite phase-changing energy storage material and methods；Raw material composition: 85~95 parts of barium hydroxide, 5~15 parts of alkali metal salt, the weight summation of the two is 100 parts；5~25 parts of expanded graphite, 1~10 part of water；Preparation step includes: that barium hydroxide, potassium nitrate are sealed in vial, molten state is heated in 85~95 DEG C of water-bath, expanded graphite and water is added, 4~6h physical absorption is carried out in 85~95 DEG C of water-bath, and it is primary every 60~120min stirring in adsorption process, it is cooled to room temperature, obtains with eutectic point binary inorganic/expanded graphite phase-changing energy storage material.Binary inorganic phase-change material prepared by the present invention has eutectic point, and phase transition temperature is single, and the application range of material has been widened in the change of phase transition temperature；Not only hot property is stablized, but also phase transformation enthalpy is high, thermal conductivity is high；Preparation process of the present invention is simple, and mild condition is at low cost.
Description
Technical field
The present invention relates to composite material technical field of energy storage more particularly to a kind of eutectic point binary inorganic/expansion stones
Black phase-changing energy storage material and method.
Background technique
Using energy source in the time and space there is imbalance between supply and demand, the development of energy storage technology and application can be solved effectively
This problem improves the utilization efficiency of the energy.And in technical field of phase change energy storage, compared to organic phase-change material, inorganic water
Salt is closed to attract extensive attention because of its suitable phase transition temperature, higher energy storage density and the series of advantages such as low in cost.
Meanwhile the phase transition temperature of such phase-change material is fixed, and temperature can also be kept constant during latent heat stores and discharges, but
Because of the relationship of temperature range, corresponding application is also relatively fixed, is limited in practical application by a certain extent.
Therefore under conditions of guaranteeing that material still has higher potential heat value, fusing point is suitably reduced, changes hydrous salt phase transition temperature, for phase
Become material many-sided use, expands its application range and be of great significance.
Summary of the invention
It is inorganic to provide a kind of eutectic point binary for the shortcomings that it is an object of the invention to overcome the above-mentioned prior art and deficiency
Class/expanded graphite phase-changing energy storage material and method.The present invention prepares expanded graphite sizing composite material and improves thermal conductivity reinforcing biography
Heat, obtain long-term hot property stabilization, long service life, significant, the good application performance of energy-saving effect material, to realize build
There are significant contribution in sustainable development, utilization of resources, the good economical society of environmental protection.
The present invention is achieved through the following technical solutions:
A kind of preparation method of eutectic point binary inorganic/expanded graphite phase-changing energy storage material, raw material form (with weight
Number calculates): 85~95 parts of barium hydroxide, 5~15 parts of alkali metal salt, the weight summation of the two is 100 parts；Expanded graphite
5~25 parts, 1~10 part of water；
Preparation step includes: that barium hydroxide, potassium nitrate are sealed in vial, in 85~95 DEG C of water-bath
It is heated to molten state, expanded graphite and water is added, 4~6h physical absorption is carried out in 85~95 DEG C of water-bath, and adsorbing
It is primary every 60~120min stirring in the process, it is cooled to room temperature, obtains with eutectic point binary inorganic/expanded graphite phase
Change energy-storage material.
To further realize the object of the invention, it is preferable that the alkali metal salt is potassium nitrate, potassium chloride, sodium nitrate and chlorine
Change one of sodium or a variety of.
Preferably, the water is the pure water removed after ionic species
Preferably, above-mentioned water-bath heating temperature is 85~95 DEG C.
Preferably, the magnetic agitation time is 40~90min.
Preferably, physical absorption heating time is 4~6h in water-bath, in adsorption process stirring interval time be 60~
120min。
Eutectic point binary inorganic/expanded graphite phase-changing energy storage material is obtained using above-mentioned preparation method.
A kind of preparation method of eutectic point binary inorganic/expanded graphite phase-changing energy storage material, raw material composition: eight water hydrogen
88 parts of barium monoxide, 12 parts of potassium nitrate, 5 parts of expanded graphite, 4 parts of deionized water；
Specific step is as follows:
1) 26.4g barium hydroxide at room temperature, is added into sealed glass jars, is placed in heating water bath in 90 DEG C of water-baths
Set molten state；
2) 3.6g potassium nitrate is added into step 1) molten state barium hydroxide, is placed in magnetic agitation in 90 DEG C of water-baths
60min obtains the binary inorganic phase-change material with eutectic point；
3) 1.5g expanded graphite, 1.2g is added into the binary inorganic phase-change material obtained by step 2) with eutectic point
Deionized water, side edged are stirred with glass bar, are subsequently placed in heating water bath 6h in 90 DEG C of water-baths, primary every 90min stirring,
It mixes them thoroughly；
4) the resulting composite phase-change energy storage material of step 3) is taken out, is cooled to room temperature to get to eutectic point two
First inorganic/expanded graphite composite phase-changing energy storage material.
A kind of preparation method of eutectic point binary inorganic/expanded graphite phase-changing energy storage material, raw material composition: eight water hydrogen
88 parts of barium monoxide, 12 parts of potassium nitrate, 10 parts of expanded graphite, 6 parts of deionized water；
Specific step is as follows:
1) 26.4g barium hydroxide at room temperature, is added into sealed glass jars, is placed in heating water bath in 90 DEG C of water-baths
Set molten state；
2) 3.6g potassium nitrate is added into step 1) molten state barium hydroxide, is placed in magnetic agitation in 90 DEG C of water-baths
60min obtains the binary inorganic phase-change material with eutectic point；
3) 3.0g expanded graphite, 1.8g is added into the binary inorganic phase-change material obtained by step 2) with eutectic point
Deionized water, side edged are stirred with glass bar, are subsequently placed in heating water bath 6h in 90 DEG C of water-baths, primary every 90min stirring,
It mixes them thoroughly；
4) the resulting composite phase-change energy storage material of step 3) is taken out, is cooled to room temperature to get to eutectic point two
First inorganic/expanded graphite composite phase-changing energy storage material.
A kind of preparation method of eutectic point binary inorganic/expanded graphite phase-changing energy storage material, raw material composition: eight water hydrogen
90 parts of barium monoxide, 10 parts of potassium chloride, 15 parts of expanded graphite, 8 parts of deionized water；
Specific step is as follows:
1) 27.0g barium hydroxide at room temperature, is added into sealed glass jars, is placed in heating water bath in 90 DEG C of water-baths
Set molten state；
2) 3.0g potassium nitrate is added into step 1) molten state barium hydroxide, is placed in magnetic agitation in 90 DEG C of water-baths
60min obtains the binary inorganic phase-change material with eutectic point；
3) 4.5g expanded graphite, 2.4g is added into the binary inorganic phase-change material obtained by step 2) with eutectic point
Deionized water, side edged are stirred with glass bar, are subsequently placed in heating water bath 6h in 90 DEG C of water-baths, primary every 90min stirring,
It mixes them thoroughly；
4) the resulting composite phase-change energy storage material of step 3) is taken out, is cooled to room temperature to get to eutectic point two
First inorganic/expanded graphite composite phase-changing energy storage material.
A kind of preparation method of eutectic point binary inorganic/expanded graphite phase-changing energy storage material, raw material composition: eight water hydrogen
90 parts of barium monoxide, 10 parts of potassium chloride, 20 parts of expanded graphite, 8 parts of deionized water；
Specific step is as follows:
1) 27.0g barium hydroxide at room temperature, is added into sealed glass jars, is placed in heating water bath in 90 DEG C of water-baths
Set molten state；
2) 3.0g potassium nitrate is added into step 1) molten state barium hydroxide, is placed in magnetic agitation in 90 DEG C of water-baths
60min obtains the binary inorganic phase-change material with eutectic point；
3) 6.0g expanded graphite, 2.4g is added into the binary inorganic phase-change material obtained by step 2) with eutectic point
Deionized water, side edged are stirred with glass bar, are subsequently placed in heating water bath 6h in 90 DEG C of water-baths, primary every 90min stirring,
It mixes them thoroughly；
4) the resulting composite phase-change energy storage material of step 3) is taken out, is cooled to room temperature to get to eutectic point two
First inorganic/expanded graphite composite phase-changing energy storage material.
Compared with the prior art, the present invention has the following advantages and effect:
The present invention can obtain by adjusting the quality proportioning of barium hydroxide and alkali metal salt with single-phase alternating temperature
The eutectic binary inorganic phase-change material of degree, shows the property of pure material.
Binary inorganic phase-change material prepared by the present invention has eutectic point, and phase transition temperature is single, and phase transition temperature
Change widened the application range of material；
There is binary inorganic/expanded graphite phase-changing energy storage material of eutectic point, hot property is steady prepared by the present invention
Fixed, phase transformation enthalpy height, thermal conductivity are high；
Preparation flow of the present invention and technological operation are simple, and melt stage temperature is low, avoid using oil bath heating, required item
Part is mild, reduces the risk of operating process；
Instrument and equipment involved in present invention preparation, the inorganic prices of raw materials are cheap, at low cost.
Being mutually mixed for material in preparation process of the present invention, is simple mechanical mixture, is grasped without additional instrument
Make.
Detailed description of the invention
Fig. 1 be in the embodiment of the present invention 1 have eutectic point binary inorganic/expanded graphite composite phase-changing energy storage material and
Its unidirectional differential scanning calorimetry figure with eutectic point binary inorganic phase-change material compareed.
Fig. 2 is that have eutectic point binary inorganic/expanded graphite composite phase-changing energy storage material in the embodiment of the present invention 3
Unidirectional differential scanning calorimetry figure.
Specific embodiment
The present invention is more specifically described in detail combined with specific embodiments below.
Embodiment 1:
One kind having eutectic point binary inorganic/expanded graphite phase-changing energy storage material, by the raw material of following parts by weight
Composition: 88 parts of barium hydroxide, 12 parts of potassium nitrate, 5 parts of expanded graphite, 4 parts of deionized water.
Specific step is as follows:
1) 26.4g barium hydroxide at room temperature, is added into sealed glass jars, is placed in heating water bath in 90 DEG C of water-baths
Set molten state；
2) 3.6g potassium nitrate is added into step 1) molten state barium hydroxide, is placed in magnetic agitation in 90 DEG C of water-baths
60min obtains the binary inorganic phase-change material with eutectic point；
3) 1.5g expanded graphite, 1.2g is added into the binary inorganic phase-change material obtained by step 2) with eutectic point
Deionized water, side edged are stirred with glass bar, are subsequently placed in heating water bath 6h in 90 DEG C of water-baths, primary every 90min stirring,
It mixes them thoroughly；
4) the resulting composite phase-change energy storage material of step 3) is taken out, is cooled to room temperature to get to eutectic point two
First inorganic/expanded graphite composite phase-changing energy storage material.
To above-mentioned acquired with eutectic point binary inorganic/expanded graphite composite phase-changing energy storage material progress associated hot
The test of physical property, fusion temperature are 66.42 DEG C, latent heat of fusion 201.6J/g, thermal conductivity 1.231W/m/K.
The tool with eutectic point binary inorganic/expanded graphite composite phase-changing energy storage material and its control of the present embodiment
There is the unidirectional differential scanning calorimetry figure of eutectic point binary inorganic phase-change material as shown in Figure 1.
Embodiment 2:
One kind having eutectic point binary inorganic/expanded graphite phase-changing energy storage material, by the raw material of following parts by weight
Composition: 88 parts of barium hydroxide, 12 parts of potassium nitrate, 10 parts of expanded graphite, 6 parts of deionized water.
Specific step is as follows:
1) 26.4g barium hydroxide at room temperature, is added into sealed glass jars, is placed in heating water bath in 90 DEG C of water-baths
Set molten state；
2) 3.6g potassium nitrate is added into step 1) molten state barium hydroxide, is placed in magnetic agitation in 90 DEG C of water-baths
60min obtains the binary inorganic phase-change material with eutectic point；
3) 3.0g expanded graphite, 1.8g is added into the binary inorganic phase-change material obtained by step 2) with eutectic point
Deionized water, side edged are stirred with glass bar, are subsequently placed in heating water bath 6h in 90 DEG C of water-baths, primary every 90min stirring,
It mixes them thoroughly；
4) the resulting composite phase-change energy storage material of step 3) is taken out, is cooled to room temperature to get to eutectic point two
First inorganic/expanded graphite composite phase-changing energy storage material.
To above-mentioned acquired with eutectic point binary inorganic/expanded graphite composite phase-changing energy storage material progress associated hot
The test of physical property, fusion temperature are 66.46 DEG C, latent heat of fusion 198.3J/g, thermal conductivity 2.81W/m/K.
Embodiment 3:
One kind having eutectic point binary inorganic/expanded graphite phase-changing energy storage material, by the raw material of following parts by weight
Composition: 90 parts of barium hydroxide, 10 parts of potassium chloride, 15 parts of expanded graphite, 8 parts of deionized water.
Specific step is as follows:
1) 27.0g barium hydroxide at room temperature, is added into sealed glass jars, is placed in heating water bath in 90 DEG C of water-baths
Set molten state；
2) 3.0g potassium nitrate is added into step 1) molten state barium hydroxide, is placed in magnetic agitation in 90 DEG C of water-baths
60min obtains the binary inorganic phase-change material with eutectic point；
3) 4.5g expanded graphite, 2.4g is added into the binary inorganic phase-change material obtained by step 2) with eutectic point
Deionized water, side edged are stirred with glass bar, are subsequently placed in heating water bath 6h in 90 DEG C of water-baths, primary every 90min stirring,
It mixes them thoroughly；
4) the resulting composite phase-change energy storage material of step 3) is taken out, is cooled to room temperature to get to eutectic point two
First inorganic/expanded graphite composite phase-changing energy storage material.
To above-mentioned acquired with eutectic point binary inorganic/expanded graphite composite phase-changing energy storage material progress associated hot
The test of physical property, fusion temperature are 66.13 DEG C, latent heat of fusion 180.6J/g, thermal conductivity 5.307W/m/K.
There is the present embodiment the unidirectional differential of eutectic point binary inorganic/expanded graphite composite phase-changing energy storage material to sweep
It is as shown in Figure 2 to retouch calorimetric figure.
Embodiment 4:
One kind having eutectic point binary inorganic/expanded graphite phase-changing energy storage material, by the raw material of following parts by weight
Composition: 90 parts of barium hydroxide, 10 parts of potassium chloride, 20 parts of expanded graphite, 8 parts of deionized water.
Specific step is as follows:
1) 27.0g barium hydroxide at room temperature, is added into sealed glass jars, is placed in heating water bath in 90 DEG C of water-baths
Set molten state；
2) 3.0g potassium nitrate is added into step 1) molten state barium hydroxide, is placed in magnetic agitation in 90 DEG C of water-baths
60min obtains the binary inorganic phase-change material with eutectic point；
3) 6.0g expanded graphite, 2.4g is added into the binary inorganic phase-change material obtained by step 2) with eutectic point
Deionized water, side edged are stirred with glass bar, are subsequently placed in heating water bath 6h in 90 DEG C of water-baths, primary every 90min stirring,
It mixes them thoroughly；
4) the resulting composite phase-change energy storage material of step 3) is taken out, is cooled to room temperature to get to eutectic point two
First inorganic/expanded graphite composite phase-changing energy storage material.
To above-mentioned acquired with eutectic point binary inorganic/expanded graphite composite phase-changing energy storage material progress associated hot
The test of physical property, fusion temperature are 66.32 DEG C, latent heat of fusion 175.3J/g, thermal conductivity 6.544W/m/K.
As described above, the present invention can be better realized.
Embodiment of the present invention are not limited by the above embodiments, other are any without departing from Spirit Essence of the invention
With changes, modifications, substitutions, combinations, simplifications made under principle, equivalent substitute mode should be, be included in of the invention
Within protection scope.
Claims (6)
1. a kind of preparation method of eutectic point binary inorganic/expanded graphite phase-changing energy storage material, it is characterised in that raw material group
At: 85~95 parts of barium hydroxide, 5~15 parts of alkali metal salt, the weight summation of the two is 100 parts；Expanded graphite 5~25
Part, 1~10 part of water；
Preparation step includes: that barium hydroxide, potassium nitrate are sealed in vial, is heated in 85~95 DEG C of water-bath
To molten state, expanded graphite and water is added, 4~6h physical absorption is carried out in 85~95 DEG C of water-bath, and in adsorption process
In it is primary every 60~120min stirring, be cooled to room temperature, obtain with eutectic point binary inorganic/expanded graphite phase transformation storage
It can material.
2. the eutectic point binary inorganic/expanded graphite phase-changing energy storage material obtained using preparation method described in claim 1.
3. a kind of preparation method of eutectic point binary inorganic/expanded graphite phase-changing energy storage material, it is characterised in that raw material group
At: 88 parts of barium hydroxide, 12 parts of potassium nitrate, 5 parts of expanded graphite, 4 parts of deionized water；
Specific step is as follows:
1) at room temperature, into sealed glass jars be added 26.4g barium hydroxide, be placed in heating water bath in 90 DEG C of water-baths set it is molten
Melt state；
2) 3.6g potassium nitrate is added into step 1) molten state barium hydroxide, is placed in magnetic agitation in 90 DEG C of water-baths
60min obtains the binary inorganic phase-change material with eutectic point；
3) be added 1.5g expanded graphite into the binary inorganic phase-change material obtained by step 2) with eutectic point, 1.2g go from
Sub- water, side edged are stirred with glass bar, are subsequently placed in heating water bath 6h in 90 DEG C of water-baths, primary every 90min stirring, make it
It is sufficiently mixed；
4) the resulting composite phase-change energy storage material of step 3) is taken out, be cooled to room temperature to get to have eutectic point binary without
Machine class/expanded graphite composite phase-changing energy storage material.
4. a kind of preparation method of eutectic point binary inorganic/expanded graphite phase-changing energy storage material, it is characterised in that raw material group
At: 88 parts of barium hydroxide, 12 parts of potassium nitrate, 10 parts of expanded graphite, 6 parts of deionized water；
Specific step is as follows:
1) at room temperature, into sealed glass jars be added 26.4g barium hydroxide, be placed in heating water bath in 90 DEG C of water-baths set it is molten
Melt state；
2) 3.6g potassium nitrate is added into step 1) molten state barium hydroxide, is placed in magnetic agitation in 90 DEG C of water-baths
60min obtains the binary inorganic phase-change material with eutectic point；
3) be added 3.0g expanded graphite into the binary inorganic phase-change material obtained by step 2) with eutectic point, 1.8g go from
Sub- water, side edged are stirred with glass bar, are subsequently placed in heating water bath 6h in 90 DEG C of water-baths, primary every 90min stirring, make it
It is sufficiently mixed；
4) the resulting composite phase-change energy storage material of step 3) is taken out, be cooled to room temperature to get to have eutectic point binary without
Machine class/expanded graphite composite phase-changing energy storage material.
5. a kind of preparation method of eutectic point binary inorganic/expanded graphite phase-changing energy storage material, it is characterised in that raw material group
At: 90 parts of barium hydroxide, 10 parts of potassium chloride, 15 parts of expanded graphite, 8 parts of deionized water；
Specific step is as follows:
1) at room temperature, into sealed glass jars be added 27.0g barium hydroxide, be placed in heating water bath in 90 DEG C of water-baths set it is molten
Melt state；
2) 3.0g potassium nitrate is added into step 1) molten state barium hydroxide, is placed in magnetic agitation in 90 DEG C of water-baths
60min obtains the binary inorganic phase-change material with eutectic point；
3) be added 4.5g expanded graphite into the binary inorganic phase-change material obtained by step 2) with eutectic point, 2.4g go from
Sub- water, side edged are stirred with glass bar, are subsequently placed in heating water bath 6h in 90 DEG C of water-baths, primary every 90min stirring, make it
It is sufficiently mixed；
4) the resulting composite phase-change energy storage material of step 3) is taken out, be cooled to room temperature to get to have eutectic point binary without
Machine class/expanded graphite composite phase-changing energy storage material.
6. a kind of preparation method of eutectic point binary inorganic/expanded graphite phase-changing energy storage material, it is characterised in that raw material group
At: 90 parts of barium hydroxide, 10 parts of potassium chloride, 20 parts of expanded graphite, 8 parts of deionized water；
Specific step is as follows:
1) at room temperature, into sealed glass jars be added 27.0g barium hydroxide, be placed in heating water bath in 90 DEG C of water-baths set it is molten
Melt state；
2) 3.0g potassium nitrate is added into step 1) molten state barium hydroxide, is placed in magnetic agitation in 90 DEG C of water-baths
60min obtains the binary inorganic phase-change material with eutectic point；
3) be added 6.0g expanded graphite into the binary inorganic phase-change material obtained by step 2) with eutectic point, 2.4g go from
Sub- water, side edged are stirred with glass bar, are subsequently placed in heating water bath 6h in 90 DEG C of water-baths, primary every 90min stirring, make it
It is sufficiently mixed；
4) the resulting composite phase-change energy storage material of step 3) is taken out, be cooled to room temperature to get to have eutectic point binary without
Machine class/expanded graphite composite phase-changing energy storage material.
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