CN104496544A - Phase change energy storage ceramsite and preparation method thereof - Google Patents
Phase change energy storage ceramsite and preparation method thereof Download PDFInfo
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Abstract
The invention provides phase change energy storage ceramsite and a preparation method thereof. The preparation method comprises the following steps: taking light porous ceramisite as a base material, adsorbing a liquid phase change energy storage material inside the base material, taking a modified epoxy resin as an encapsulating material, thereby obtaining the product; particularly, the modified epoxy resin is formed by uniformly mixing an epoxy resin adhesive, an epoxy hardener and heat-conducting powder; and the heat-conducting powder refers to graphite powder with high heat conductivity coefficient. Therefore, the heat conductivity coefficient of the modified epoxy resin is obviously increased, so that the heat exchange efficiency of the phase change energy storage ceramsite is improved, and the phase change energy storage temperature regulation function of the phase change energy storage ceramsite is realized.
Description
Technical field
The present invention relates to building material field, a kind of method of in particular Phasochange energy storage ceramic particle and preparation thereof.
Background technology
In recent years, building energy conservation has caused the concern of the different research field scholars such as the domestic and international energy, material, building.Phase change material (Phase Change Material, PCM) with compared with the absorption of macro-energy or release, has broad application prospects in the process undergone phase transition in Solar use, building energy conservation and air-conditioning heating.Utilize the latent heat of phase change of phase change material to store the technology of heat energy, have energy storage density large, store exothermic process and be similar to the advantages such as isothermal, process be easy to control.Phase change material is applied to building field-there is heat transfer efficiency in architectural employing high; latent heat of phase change is large; the phase-changing energy storage material that transformation temperature is suitable; just accumulation of heat can lower the temperature when room temperature is higher; exotherm when room temperature is lower, maintains room temperature all the time in OK range, can improve energy use efficiency; reduce building energy consumption, for entire society's save energy and protection of the environment, all there is significant active effect.
Solid-liquid phase change material is current application phase change material the most widely.At present, phase change material application is under construction all be used in the non-structural elements such as building enclosure substantially, as phase change material is put into plasterboard, makes the non bearing structures such as the ceiling with phase change energy storage function.From phase change material and building energy conservation discipline development, the investigation and application of " structure-function " integrated composite is inexorable trend, following phase change material building field application mode mainly, the phase-changing energy storage material of porous material base is made with the porous material absorption phase change material of good mechanical performance, then by itself and cement-based material compound, the structure-function material that existing phase change energy storage function has again excellent mechanical property is made.This " structure-function " integrated material can be directly used in production building structural element, and this will simplify the application of phase change material at building field to a great extent.
At present, investigator is had to select cement, pitch etc. as packaged material, surface parcel is carried out to the porous material being adsorbed with solid-liquid phase change material, but effect is unsatisfactory, after repeatedly phase transformation circulates, can there is seepage in liquid phase change material, finally cause above-mentioned porous material phase change energy storage function to lose efficacy.Wrap up the porous material being adsorbed with phase-changing energy storage material as packaged material with resin, effect is better, can prevent from becoming liquid phase change material generation seepage mutually; But, with resin, surface encapsulation is carried out to phase-change accumulation energy porous material, then, prepares composite functional material with this phase-change accumulation energy porous material and cement-based material, have the following disadvantages:
(1) resin has viscosity, and it can make phase-change accumulation energy porous material mutually adhere as packaged material; And it has mobility before the hardening, phase-change accumulation energy porous material surface can be caused to encapsulate uneven, affect packaging effect.
(2) thermal conductivity of resin is low.Because the thermal conductivity of resin is lower, it can cause the heat exchange efficiency of described phase-change accumulation energy porous material low as packaged material, phase change material can not be undergone phase transition completely, or impel it to complete needed for phase transformation chronic, cause described phase change material utilization ratio on the low side, thus reduce its phase-change energy-storage temperature adjustment effect.
(3) resin can make the interfacial adhesion of phase-change accumulation energy porous material and cement matrix poor as packaged material.Resin belongs to organic materials, and cement-based material belongs to inorganic materials, organic materials and inorganic materials consistency poor; The cohesive force of phase-change accumulation energy porous material and cement matrix can be caused with resin poor as packaged material, finally affect the intensity of this composite functional material of cement based phase-change accumulation energy porous material.
Therefore, prior art awaits further improvement.
Summary of the invention
In view of above-mentioned weak point of the prior art, the object of the invention is to for user provides a kind of method of Phasochange energy storage ceramic particle and preparation thereof, with the problem such as to solve in prior art that the encapsulation of phase-change accumulation energy porous material surface is uneven, phase change material utilization ratio is on the low side and the cohesive force of porous material and cement matrix is poor.
The technical scheme that technical solution problem of the present invention adopts is as follows:
A kind of Phasochange energy storage ceramic particle, wherein, with the phase-changing energy storage material that light porous haydite absorption is liquid, and adopts modified epoxy as packaged material;
Described modified epoxy is uniformly mixed to form by epoxy resin glue, epoxy hardener and heat conduction powder.
Described Phasochange energy storage ceramic particle, is characterized in that, described Phasochange energy storage ceramic particle also comprises: Additive upper layer;
Described Additive upper layer by: the outside surface of the Phasochange energy storage ceramic particle encapsulated wraps up one deck mineral admixture and is formed.
Described Phasochange energy storage ceramic particle, wherein, in described modified epoxy, the add-on of heat conduction powder is 15% of epoxy resin glue and epoxy hardener quality sum.
Described Phasochange energy storage ceramic particle, wherein, described heat conduction powder is Graphite Powder 99.
Described Phasochange energy storage ceramic particle, wherein, described mineral admixture is wollastonite powder.
A preparation method for Phasochange energy storage ceramic particle, wherein, comprising:
Light porous haydite inside is adsorbed with liquid phase-changing energy storage material by A, use vacuum suck method;
B, use and by the modified epoxy of epoxy resin glue, epoxy hardener and heat conduction powder Homogeneous phase mixing, the light porous haydite that inside is adsorbed with phase-changing energy storage material is encapsulated.
The preparation method of described Phasochange energy storage ceramic particle, wherein, described method also comprises:
C, use mineral admixture wrap up the Phasochange energy storage ceramic particle encapsulated, and make described Phasochange energy storage ceramic particle have Additive upper layer.
The preparation method of described Phasochange energy storage ceramic particle, wherein, also comprised before steps A:
A0, carry out pre-treatment to described light porous haydite, described pre-treatment comprises: clean and drying treatment light porous haydite.
The preparation method of described Phasochange energy storage ceramic particle, wherein, comprises in described steps A:
A1, phase-changing energy storage material is placed in vessel, after described pretreated light porous haydite is mixed with phase-changing energy storage material, places in an oven together with vessel;
A2, arranges Multi-hole steel silk screen above light porous haydite, and light porous haydite is immersed in phase-changing energy storage material completely.
The preparation method of described Phasochange energy storage ceramic particle, wherein, described steps A also comprises:
A3, when phase-changing energy storage material being adsorbed under vacuum conditions after in light porous haydite, filtering out from phase-changing energy storage material from by light porous haydite, and cooling.
Beneficial effect, the method for a kind of Phasochange energy storage ceramic particle provided by the present invention and preparation thereof, by with light porous haydite for base material, adsorb liquid phase-changing energy storage material therein, and adopt modified epoxy to make as packaged material; Especially, described modified epoxy is uniformly mixed to form by epoxy resin glue, epoxy hardener and heat conduction powder; Described heat conduction powder is the Graphite Powder 99 with high thermal conductivity coefficient, therefore considerably increases the thermal conductivity of modified epoxy, to improve the heat exchange efficiency of Phasochange energy storage ceramic particle, plays Phasochange energy storage ceramic particle phase-change energy-storage temperature adjustment function.
Accompanying drawing explanation
Fig. 1 is the flow chart of steps of the preparation method of a kind of Phasochange energy storage ceramic particle provided by the present invention.
Fig. 2 is the device structure schematic diagram that in method described in the present invention, vacuum suck method uses.
Embodiment
For making object of the present invention, technical scheme and advantage clearly, clearly, developing simultaneously referring to accompanying drawing, the present invention is described in more detail for embodiment.Should be appreciated that specific embodiment described herein only for explaining the present invention, being not intended to limit the present invention.
The invention provides a kind of Phasochange energy storage ceramic particle, it for base material with light porous haydite, adsorbs liquid phase-changing energy storage material therein, and adopts modified epoxy as packaged material; Described modified epoxy is uniformly mixed to form by epoxy resin glue, epoxy hardener and heat conduction powder.
Concrete, described Phasochange energy storage ceramic particle uses the phase-changing energy storage material of the light porous haydite adsorptive liquid shape of good mechanical performance; Then, modified epoxy is adopted to carry out surface encapsulation as packaged material to above-mentioned Phasochange energy storage ceramic particle, thus can effectively prevent from becoming liquid phase-changing energy storage material generation seepage mutually, described modified epoxy adds the appropriate powder mass with high thermal conductivity coefficient and enhances its heat conductivility, to improve the heat exchange efficiency of described phase-changing energy storage material.
Haydite selected by the present invention is light porous haydite, and it is fired at about 1200 DEG C and forms, and main mineral constituent is SiO
2and Al
2o
3, have higher porosity (open porosity can reach more than 50%, and overall porosity can reach 70% ~ 80%), have again good mechanical property, be desirable phase-changing energy storage material carrier simultaneously.
Phase-changing energy storage material selected by the present invention is phase change paraffin, and it is a kind of organic phase change material, and transformation temperature is suitably 25 DEG C, having higher latent heat of phase change is 153.1J/g, stable chemical nature, nontoxic non-corrosiveness, and without crossing cold and separating out phenomenon, be desirable phase-changing energy storage material.
Preferably, select modified epoxy as packaged material.Described modified epoxy is by epoxy resin glue, epoxy hardener and heat conduction powder constituent.In use need to heat epoxy resin glue and epoxy hardener, then 1:1 carries out Homogeneous phase mixing in mass ratio.Practice draws, epoxy resin glue and epoxy hardener are heated to 45 DEG C ~ 55 DEG C when encapsulating and are advisable, now epoxy resin glue and epoxy hardener have comparatively high workability, and setting rate is also comparatively slow, is convenient to carrying out smoothly of encapsulation process.Described heat conduction powder is the Graphite Powder 99 of high thermal conductivity coefficient.It can be used as modified material evenly to add in packaged material, to improve the capacity of heat transmission of packaged material, and then improve the heat exchange efficiency of described Phasochange energy storage ceramic particle.
It should be noted that, described heat conduction powder can also be metal-powder, such as copper powder.
In order to improve the cohesive force at the interface of Phasochange energy storage ceramic particle and cement matrix, further, the Phasochange energy storage ceramic particle having wrapped up modified epoxy with mineral admixture effects on surface evenly wraps up, and what make Phasochange energy storage ceramic particle is uniformly coated with mineral admixture.Its effect is: on the one hand, make modified epoxy wrap up Phasochange energy storage ceramic particle equably, on the other hand, strengthens the cohesive force of Phasochange energy storage ceramic particle and cement matrix.Preferably, described mineral admixture selects silicon ash.
Under the prerequisite of the described Phasochange energy storage ceramic particle provided is provided on the invention, present invention also offers a kind of preparation method of Phasochange energy storage ceramic particle, as shown in Figure 1, comprising:
S1, use vacuum suck method are by phase-changing energy storage material liquid for light porous haydite inside absorption.
In order to obtain preferably adsorption effect, before phase-changing energy storage material is adsorbed onto light porous haydite inside by use vacuum suck method, also comprise step:
Carry out pre-treatment to described light porous haydite, described pre-treatment comprises: clean and drying treatment light porous haydite.Concrete pretreated process explanation is as follows:
The first step, cleans described light porous haydite, washes away the residue on haydite surface, and using afterwards slips through the net filters light porous haydite, till it no longer includes under water droplet.
Second step, the light porous haydite filtered is put into baking oven and carries out drying and processing, the temperature of baking oven is set as 105 DEG C, first time weighs and record to it before putting into light porous haydite, every one hour, it is weighed and record afterwards, till double weighing results is consistent, to guarantee that light porous haydite is in absolute dry condition.Why described light porous haydite will be in absolute dry condition, be because: on the one hand, if containing moisture in light porous haydite, the absorbed dose of its liquid towards phase change paraffin can be reduced, on the other hand, phase change paraffin belongs to organic materials, and it is incompatible with water, if can affect the distribution of phase change paraffin in light porous haydite containing moisture in light porous haydite; The energy-saving and temperature-regulating effect of described Phasochange energy storage ceramic particle can be reduced both this.
3rd step, closes baking oven, allows above-mentioned light porous haydite temperature be down to normal temperature.
After light porous haydite is carried out pre-treatment by above-mentioned steps, described step S1 also comprises:
Multi-hole steel silk screen is set above light porous haydite, light porous haydite is immersed in phase-changing energy storage material completely.
Phase-changing energy storage material is placed in vessel, after described pretreated light porous haydite is mixed with phase-changing energy storage material, places in an oven together with vessel.
Concrete, liquid phase change paraffin is poured in vessel, higher than the Multi-hole steel silk screen of the appropriate position on the surface of haydite in vessel, light porous haydite is fully mixed with liquid phase change paraffin; The effect of Multi-hole steel silk screen stops light porous haydite to float over liquid phase change paraffin surface, and make it be immersed in completely all the time in liquid phase change paraffin, makes the two fully contact, thus make light porous haydite adsorptive liquid shape phase change paraffin in large quantities.
Because phase change paraffin is likely solid-state, therefore also comprise before using it: phase change paraffin being positioned over temperature is constant temperature 24 hours in the baking oven of 40 DEG C, phase change paraffin is absorbed heat undergo phase transition and become liquid state up hill and dale, simultaneously, above-mentioned light porous haydite is positioned in steel vessel, these steel vessel are diameters is 30cm, be highly 15cm, and the airtight impervious cylindrical vessel in bottom, the quality of light porous haydite is 640.69g, is arranging one Multi-hole steel silk screen higher than appropriate position, haydite surface; It is in the baking oven of 40 DEG C 24 hours that these vessel filling light porous haydite are positioned over temperature with phase change paraffin, light porous haydite and vessel are made to have the temperature identical with phase change paraffin, like this, would not be different because of three's temperature in light porous haydite adsorptive liquid shape phase change paraffin process, and make the liquid too fast reduction of phase change paraffin temperature, accelerate it and undergo phase transition the process becoming solid state.
After have passed through the pre-treatment of above-mentioned steps, next the vessel being loaded with light porous haydite and phase change paraffin are put into reactor, use vacuum suck method liquid phase-change paraffin to be adsorbed onto light porous haydite inner.
Figure 2 shows that in this step and adopt vacuum suck method to make light porous haydite inside be adsorbed with the equipment connection schematic diagram of liquid phase-change energy storage material, as shown in Figure 2, the vessel 3 filling liquid phase-changing energy storage material 2 and light porous haydite 1 are positioned in the space in reactor, build top cover, this reactor connects the filtration unit 7 with pressure warning unit 5, and filtration unit 7 is connected with vacuum pump 4.
Preferably, in specific implementation process, phase-changing energy storage material is phase change paraffin.
Make experimental situation temperature remain on 28 DEG C, the transformation temperature of a little higher than phase change paraffin of experimental situation temperature, makes phase change paraffin be in liquid state all the time, ensures that light porous haydite 1 adsorptive liquid shape phase change paraffin can carry out constantly.Air valve switch on closed reaction still, makes space and extraneous air in it completely cut off, opens vacuum pump 4, make the Pressure Drop in space in reactor to-0.1MPa, keep 40 minutes under this negative pressure; Like this, reactor is in vacuum state, and light porous haydite 1 just can the phase change paraffin of adsorptive liquid shape in large quantities.Close vacuum pump 4, open the air valve switch on glass reaction still, space in it is allowed to be connected with extraneous air, normal atmosphere is reached at leisure to make its internal pressure, interior space pressure is equal with normal atmosphere, just can take off the top cover of glass reaction still, take out the vessel filling liquid phase change paraffin and light porous haydite.
When phase-changing energy storage material being adsorbed under vacuum conditions after in light porous haydite, light porous haydite is filtered out from phase-changing energy storage material, and cool, such as be placed in refrigerator, phase change paraffin undergone phase transition transfer to solid-state to prevent liquid phase-change paraffin generation seepage.
S2, use and by the modified epoxy of epoxy resin glue, epoxy hardener and heat conduction powder Homogeneous phase mixing, the light porous haydite that inside is adsorbed with phase-changing energy storage material is encapsulated.
The cooled light porous haydite being adsorbed with phase change paraffin is taken out, uses modified epoxy to carry out surface encapsulation to it.Concrete, Phasochange energy storage ceramic particle is added in the above-mentioned modified epoxy mixed, then stir, make this modified epoxy fully wrap up described Phasochange energy storage ceramic particle, wrapped up the Phasochange energy storage ceramic particle of modified epoxy with filtering surface of slipping through the net.
In order to increase the cohesive force of Phasochange energy storage ceramic particle and cement matrix, described method also comprises step:
Use mineral admixture to wrap up the Phasochange energy storage ceramic particle encapsulated, make described Phasochange energy storage ceramic particle have Additive upper layer.
In a particular embodiment, preferably, the Phasochange energy storage ceramic particle selecting silicon ash effects on surface to encapsulate modified epoxy evenly wraps up, surface encapsulation modified epoxy and the Phasochange energy storage ceramic particle of mutually adhering are separated because of the parcel of silicon ash and are become separate, after epoxy cure to be modified, with the silicon ash that screen filtration is unnecessary, just obtained modification Phasochange energy storage ceramic particle, be positioned in cryogenic refrigerator, absorption phase change paraffin is within it undergone phase transition as solid.
Before experiment, the quality of light porous haydite is 640.69g, and after experiment, the quality of light porous haydite is 1102.67g, it can thus be appreciated that light porous haydite under vacuum conditions, can the phase change paraffin of adsorptive liquid shape in large quantities, and adsorptive capacity is 72.1%.Weight before adsorptive capacity=(weight before the weight after light porous haydite absorption phase change paraffin-light porous haydite absorption phase change paraffin)/light porous haydite absorption phase change paraffin) × 100%, i.e. 72.1%=(1102.67-640.69)/640.69) × 100%.
In order to prove to add the heat conductivility that Graphite Powder 99 can strengthen the epoxy resin as packaged material, respectively Determination of conductive coefficients is carried out to pure epoxy resin and the modified epoxy of the Graphite Powder 99 that with the addition of different deal, the addition of Graphite Powder 99 is 5%, 10%, 15% and 20% of epoxy resin quality, and test result is as shown in table 1.
As shown in Table 1, add the thermal conductivity that Graphite Powder 99 can increase epoxy resin, and increasing along with Graphite Powder 99 content, epoxy resin heat conduction coefficient also increases accordingly, illustrates and adds the capacity of heat transmission that Graphite Powder 99 can improve epoxy resin.Although when Graphite Powder 99 addition is 20% of epoxy resin quality, the thermal conductivity of modified epoxy is 0.654 w/(mk to the maximum), but the addition now due to Graphite Powder 99 is comparatively large, causes modified epoxy to become feeding-up, be unfavorable for wrapping up Phasochange energy storage ceramic particle, packaging effect is poor; So preferred Graphite Powder 99 addition is 15% of epoxy resin quality, now the thermal conductivity of modified epoxy is 0.528 w/ (mk), 2.3 times of thermal conductivity 0.227 w/ (mk) of the chances are pure epoxy resin.
Phasochange energy storage ceramic particle of the present invention and preparation method thereof compared with prior art has following characteristics:
(1) as carrier light porous haydite mechanical property better and overall porosity and open porosity are all higher.Mechanical property is an important indicator of " structure-function " integrated composite, and the haydite as phase change material carrier must have good mechanical property and just can meet the demands; The light porous haydite that the application's patent uses is fired at about 1200 DEG C and is formed, and main component is SiO
2and Al
2o
3, mechanical property is better, for " structure-function " integrated composite mechanical property aspect provides guarantee.The overall porosity of light porous haydite and open porosity determine the capacity of its adsorptive liquid shape phase change paraffin, and then affect phase-change accumulation energy effect; Light porous haydite overall porosity or open porosity higher, the liquid phase change material of absorption is more, and phase-change accumulation energy effect is better; Otherwise overall porosity or the open porosity of haydite are lower, the liquid phase change material of absorption is fewer, and phase-change accumulation energy effect is poorer; The light porous haydite that the application's patent uses has higher porosity (overall porosity reaches 70% ~ 80%, and open porosity reaches more than 50%), can adsorptive liquid shape phase change material in large quantities.The light porous haydite mechanical property that the application's patent uses is better, and having again higher overall porosity and open porosity, is desirable phase-changing energy storage material carrier.
(2) as the phase change material better performances of energy storage material.Functional is another important indicator of " structure-function " integrated composite, and phase change material, as energy storage material, is that " structure-function " integrated composite plays a functional key factor.The stability of transformation temperature, latent heat of phase change, chemical property, whether poisonous or corrodibility and whether had cold or to separate out phenomenon be weigh the important indicator of phase change material performance.Transformation temperature can affect the phase change material absorption of energy or release in actual applications, if transformation temperature is too high or too low, cause actual environment temperature cannot reach the transformation temperature of phase change material, phase change material will be in liquid or solid-state always, can not undergo phase transition, thus the temperature adjustment function of its energy storage materials of phase change was lost efficacy; The capacity storing when latent heat of phase change determines that phase change material undergoes phase transition or release energy, latent heat of phase change is comparatively large, and store when phase change material undergoes phase transition or release energy just many, on the contrary, latent heat of phase change is less, stores or release energy just few when phase change material undergoes phase transition; The stability of chemical property also can affect phase change material phase-change accumulation energy or release the performance of energy function, stable chemical nature, its phase transition process can be made to continue, successfully carry out, ensure phase-change accumulation energy or release completing of energy, otherwise, phase change material unstable chemcial property, after there is phase transformation for several times, its chemical composition will be decomposed, and its follow-up phase transition process cannot be carried out, and causes its phase-change accumulation energy or releases energy disabler; Similarly, the whether poisonous or corrodibility of phase change material and whether had cold or separated out phenomenon and also can have an impact in actual applications to it, if phase change material is poisonous or corrodibility, had cold or separated out phenomenon, just can not apply in practice.The phase change paraffin used in the present invention is a kind of organic phase change material, and its transformation temperature is suitably 25 DEG C, and having higher latent heat of phase change is 153.1J/g, stable chemical nature, nontoxic non-corrosiveness, and without crossing cold and separating out phenomenon, is desirable phase-changing energy storage material.
(3) pre-treatment has been done to light porous haydite.Before light porous haydite adsorptive liquid shape phase change paraffin, light porous haydite is cleaned, then, dries, ensure that it is in drying regime.This measure is conducive to light porous haydite adsorptive liquid shape phase change paraffin.
(4) the vessel inherence filling light porous haydite is provided with one Multi-hole steel silk screen higher than appropriate position, light porous haydite surface.Porous ceramic grain lighter weight, liquid phase change paraffin is poured in steel vessel, light porous haydite can be made to float on liquid phase change paraffin surface, make its part be exposed in air, and can not contact completely with liquid phase change paraffin, thus reduce its adsorptive capacity to liquid phase change paraffin, the effect being provided with one Multi-hole steel silk screen higher than the surperficial appropriate position of haydite in steel vessel is: on the one hand, light porous haydite is prevented to float over phase change paraffin surface, and make it intactly be immersed in all the time in liquid phase change paraffin, thus make it contact completely with phase change paraffin, on the other hand, suitable space has been reserved between light porous haydite and Multi-hole steel silk screen, the effect in this space pours steel vessel at liquid phase change paraffin, when light porous haydite floats, this space provides enough positions that light porous haydite is spread out for light porous haydite, keep relatively independent to each other, thus make every light porous haydite can be intactly, fully be immersed in liquid phase change paraffin, it is made to be able to fully, adsorptive liquid shape phase change paraffin in large quantities.
(5) steel vessel have the temperature identical with liquid phase change paraffin with light porous haydite.When pouring liquid phase change paraffin into fill light porous haydite vessel, if the temperature of light porous haydite and vessel is lower than the temperature of liquid phase change paraffin, light porous haydite and vessel will the heats of absorbing fluid shape phase change paraffin, accelerate its temperature to reduce, thus accelerate it and undergo phase transition the process becoming solid state, decrease it and keep the liquid time, be unfavorable for light porous haydite adsorptive liquid shape phase change paraffin.It is in the baking oven of 40 DEG C 24 hours that the vessel filling light porous haydite are positioned over temperature with phase change paraffin, phase change paraffin is absorbed heat undergo phase transition and while thoroughly liquefying, light porous haydite and vessel are made to have the temperature identical with liquid phase change paraffin, thus avoid because light porous haydite and pot temperature absorb its heat lower than liquid phase change paraffin, slow down liquid phase change paraffin temperature to reduce, thus slowed down that it undergoes phase transition the process becoming solid state, add it and keep the liquid time, ensure that light porous haydite adsorptive liquid shape phase change paraffin in large quantities.
(6) a little higher than phase change paraffin transformation temperature of experimental situation temperature.Experimental situation temperature is lower than phase change paraffin transformation temperature, and it will absorb the heat of phase change paraffin, causes phase change paraffin temperature to reduce, and undergoing phase transition lower than transformation temperature 25 DEG C becomes solid-state, is unfavorable for light porous haydite adsorptive liquid shape phase change paraffin.The experimental situation temperature of the application's patent remains on 28 DEG C, the transformation temperature of a little higher than phase change paraffin 25 DEG C, thus avoid the generation of above-mentioned phenomenon, phase change paraffin is made to be in liquid state all the time, ensure that light porous haydite adsorptive liquid shape phase change paraffin can carry out constantly, thus make light porous haydite be adsorbed liquid phase change paraffin in large quantities.
(7) Phasochange energy storage ceramic particle is with after modified epoxy encapsulation, then has wrapped up the uniform silicon ash of one deck.The effect of this silicon ash is: on the one hand, Phasochange energy storage ceramic particle is with after modified epoxy parcel, Phasochange energy storage ceramic particle can be made mutually to adhere because modified epoxy has viscosity, and it has mobility before the hardening, Phasochange energy storage ceramic particle surface encapsulation can be caused uneven, cause packaging effect undesirable; The introducing of silicon ash, the Phasochange energy storage ceramic particle of mutually having adhered because having wrapped up modified epoxy is made to separate and become separate, and make epoxy resin lose mobility, make modified epoxy evenly be wrapped up Phasochange energy storage ceramic particle both this, strengthen packaging effect; On the other hand, modified epoxy belongs to organic materials, and cement-based material belongs to inorganic materials, and the two consistency is poor, causes the two cohesive force poor; Silicon ash can improve surface and wrap up the Phasochange energy storage ceramic particle of modified epoxy and the bonding interface of cement-based material, to strengthen the cohesive force of the two.
The method of a kind of Phasochange energy storage ceramic particle provided by the present invention and preparation thereof, by with light porous haydite for base material, adsorb liquid phase-changing energy storage material therein, and adopt modified epoxy to make as packaged material; Especially, described modified epoxy is uniformly mixed to form by epoxy resin glue, epoxy hardener and heat conduction powder; Described heat conduction powder is the Graphite Powder 99 with high thermal conductivity coefficient, therefore considerably increases the thermal conductivity of modified epoxy, to improve the heat exchange efficiency of Phasochange energy storage ceramic particle, plays Phasochange energy storage ceramic particle phase-change energy-storage temperature adjustment function.
Be understandable that, for those of ordinary skills, can be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, and all these change or replace the protection domain that all should belong to the claim appended by the present invention.
Claims (10)
1. a Phasochange energy storage ceramic particle, is characterized in that, with the phase-changing energy storage material that light porous haydite absorption is liquid, and adopts modified epoxy as packaged material;
Described modified epoxy is uniformly mixed to form by epoxy resin glue, epoxy hardener and heat conduction powder.
2. Phasochange energy storage ceramic particle according to claim 1, it is characterized in that, described Phasochange energy storage ceramic particle also comprises: Additive upper layer;
Described Additive upper layer by: the outside surface of the Phasochange energy storage ceramic particle encapsulated wraps up one deck mineral admixture and is formed.
3. Phasochange energy storage ceramic particle according to claim 1, it is characterized in that, in described modified epoxy, the add-on of heat conduction powder is 15% of epoxy resin glue and epoxy hardener quality sum.
4. Phasochange energy storage ceramic particle according to any one of claim 1-3, is characterized in that, described heat conduction powder is Graphite Powder 99.
5. Phasochange energy storage ceramic particle according to claim 2, it is characterized in that, described mineral admixture is wollastonite powder.
6. a preparation method for Phasochange energy storage ceramic particle, is characterized in that, comprising:
A, use vacuum suck method are by phase-changing energy storage material liquid for light porous haydite inside absorption;
B, use and by the modified epoxy of epoxy resin glue, epoxy hardener and heat conduction powder Homogeneous phase mixing, the light porous haydite that inside is adsorbed with phase-changing energy storage material is encapsulated.
7. the preparation method of Phasochange energy storage ceramic particle according to claim 6, it is characterized in that, described method also comprises:
C, use mineral admixture wrap up the Phasochange energy storage ceramic particle encapsulated, and make described Phasochange energy storage ceramic particle have Additive upper layer.
8. the preparation method of Phasochange energy storage ceramic particle according to claim 6, is characterized in that, also comprised before steps A:
A0, carry out pre-treatment to described light porous haydite, described pre-treatment comprises: clean and drying treatment light porous haydite.
9. the preparation method of Phasochange energy storage ceramic particle according to claim 7, is characterized in that, comprise in described steps A:
A1, phase-changing energy storage material is placed in vessel, after described pretreated light porous haydite is mixed with phase-changing energy storage material, places in an oven together with vessel;
A2, arranges Multi-hole steel silk screen above light porous haydite, and light porous haydite is immersed in phase-changing energy storage material completely.
10. the preparation method of Phasochange energy storage ceramic particle according to claim 9, it is characterized in that, described steps A also comprises:
A3, when phase-changing energy storage material being adsorbed under vacuum conditions after in light porous haydite, light porous haydite being filtered out from phase-changing energy storage material, and it is cooled.
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| CN106120014A (en) * | 2016-06-29 | 2016-11-16 | 北京宇田相变储能科技有限公司 | A kind of temperature sensitive compositions and non-solvent preparation thereof |
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| CN107200530A (en) * | 2017-05-27 | 2017-09-26 | 苏州混凝土水泥制品研究院检测中心有限公司 | A kind of preparation method of Phasochange energy storage ceramic particle and its application in fiber concrete structure |
| CN107270756A (en) * | 2017-04-28 | 2017-10-20 | 北京中集精新相能科技有限公司 | Phase-changing energy storage material carrier |
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| CN102303958A (en) * | 2011-05-17 | 2012-01-04 | 武汉理工大学 | Rice hull ash-paraffin wax phase-change aggregate and preparation method thereof |
| CN103509526A (en) * | 2012-06-17 | 2014-01-15 | 曹雪娟 | Porous substrate phase-changing heat storage particles and preparation method thereof |
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| CN107200530A (en) * | 2017-05-27 | 2017-09-26 | 苏州混凝土水泥制品研究院检测中心有限公司 | A kind of preparation method of Phasochange energy storage ceramic particle and its application in fiber concrete structure |
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| CN109370539B (en) * | 2018-12-11 | 2021-04-20 | 安徽纳微技术研发中心有限公司 | Phase-change energy-storage microsphere and preparation method thereof |
| CN111393096A (en) * | 2019-08-12 | 2020-07-10 | 华北理工大学 | Core-shell type light heat-insulating material and preparation method and application thereof |
| CN112442337A (en) * | 2019-08-29 | 2021-03-05 | 张立强 | Resin type phase change energy storage material and preparation method thereof |
| CN110451895A (en) * | 2019-09-12 | 2019-11-15 | 深圳市奇信集团股份有限公司 | A kind of phase-changing wall slurry and preparation method thereof |
| CN111171793A (en) * | 2020-01-06 | 2020-05-19 | 西安建筑科技大学 | Inorganic heat-storage unfired ceramsite and preparation method thereof |
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| CN112892507A (en) * | 2021-01-19 | 2021-06-04 | 深圳大学 | Device and method for preparing film-covered self-healing material |
| CN112892507B (en) * | 2021-01-19 | 2024-06-14 | 深圳大学 | Device and method for preparing laminated self-healing material |
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