CN1903781A - Phase change anticracking grout and preparation method of used phase change material particulate - Google Patents
Phase change anticracking grout and preparation method of used phase change material particulate Download PDFInfo
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- CN1903781A CN1903781A CN 200610099192 CN200610099192A CN1903781A CN 1903781 A CN1903781 A CN 1903781A CN 200610099192 CN200610099192 CN 200610099192 CN 200610099192 A CN200610099192 A CN 200610099192A CN 1903781 A CN1903781 A CN 1903781A
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- phase change
- change material
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- anticracking grout
- butyl stearate
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Abstract
The present invention provides a kind of phase change anticrack mortar and preparation method of its granular phase change material. Said mortar is mainly used for external wall protection and heat insulation of building. Said invention includes uniformly-mixed polymer adhesive powder, low alkali cement, inorganic filling material and natural fibre. Besides, in the above-mentioned materials 10%-50% of granular phase change material can be mixed. The described phase change material uses porous medium as matrix material, and in the micropores of the described porous medium the phase change material is filled respectively, and said invention utilizes polymer covering material as surface-packaging material.
Description
Technical field
The present invention relates to a kind of mortar for building, particularly a kind of phase change anticracking grout that mixes phase change material.The invention still further relates to a kind of preparation method who is applied to the phase change material in the described phase change anticracking grout.
Background technology
Along with the enhancing of people's energy-conserving and environment-protective consciousness, building energy conservation is had higher requirement.How to improve utilization efficiency of energy and become the focus that everybody pays close attention to.Aspect building energy conservation, mainly concentrate on construction wall accumulation of heat and heat insulation on.The little styrofoam of present stage general employing thermal conductivity, the heat preservation slurry of polyurethane sheet or admixture granular polystyrene are as the external-wall exterior insulation material, to reduce the influence of external environment to room temp.The newer heat insulation way of wall thermal insulating also has the phase change material of employing as main energy-saving material of heat-insulation system or auxiliary energy-saving material now.
Because existing heat-insulation system surface strength is poor, so need do the protection of anticracking grout layer.But common anticracking grout only plays a protective role, and itself does not have any effect to system's heat insulating effect.
Traditional phase change material, solid～liquid mutual conversion can take place during use, so must use special container to be encapsulated, this not only can increase the thermal resistance between heat-transfer medium and the phase change material, reduce heat transfer efficiency, and cost also can correspondingly improve, and solid-liquid phase change material, particularly salt hydrate easily took place coldly, and problem such as be separated and easily wear out.
Summary of the invention
For overcoming the defective of prior art, the invention provides a kind of phase change anticracking grout that is mixed with phase change material particulate, can cracking resistance can be incubated again, can also regulate room temp.The present invention also provides the preparation method who is applied to the phase change material particulate in this phase change anticracking grout, and manufacturing process is simple, can produce the phase change material particulate that is fit to be blended in the above-mentioned phase change anticracking grout.
For achieving the above object, the invention provides a kind of phase change anticracking grout, comprise mixed uniformly polymer glue powder, low alkali cement, mineral filler and natural fiber, also be mixed with weight ratio and be 10%～50% phase change material particulate, described phase change material particulate is body material with the porous medium, phase change material is filled in the micropore of described porous medium, and with the polymer overmold material as the package surface material.
Use this phase change anticracking grout, compare with existing mortar, owing in known mortar, mix the phase change material particulate of certain weight ratio, phase change material particulate has thermal storage effect, when raising, temperature undergoes phase transition the absorption heat, and when reducing, temperature emits heat, so just can be implemented in abundant storage power on daytime, release energy night, be used for all or part of burden peak load on daytime, building heating or air-conditioning are used no or little, also can reduce the capacity of required air treatment facility, reduce the operation and maintenance cost of air-conditioning or heating system, and utilize the energy more rationally and effectively.Also can reduce the temperature fluctuation in the buildings simultaneously, improve indoor comfort level.Thereby mortar is promptly played a protective role, play the effect of insulation and attemperation again.
Described phase change material is the mixture of Octadecane acid or n-hexadecane acid and n-butyl stearate.
Described porous medium is glass microballon, activated carbon or pearlstone.
The preparation method of described phase change material particulate is:
A, phase change material is made the phase change material liquation 65 ℃ of following fusions;
B, porous medium is poured in the described phase change material liquation, and carried out mechanical stirring, described phase change material liquation is fully entered in the micropore of described porous medium, then porous medium is taken out;
C, the rapid resulting porous medium of previous step is put into polymer overmold material slurries, soak after 4～8 hours and take out;
D, the porous medium of polymer overmold material coating is at room temperature dry makes the polymer overmold material filming;
E, become single-size, sieve then, obtain uniform phase change material particulate through mechanical mill.
Wherein said a step in the aforesaid method and b step can replace with following two steps:
A, phase change material mechanical mill is become the nano-scale phase-changing material powder;
B, with described phase change material powder and porous medium mechanically mixing, described phase change material powder is fully entered in the micropore of described porous medium, then porous medium is taken out.
By aforesaid method, phase change material is fully entered in the micropore of porous medium, the c～e step through aforesaid method can obtain uniform phase change material again.Manufacture craft is simple.
Porous mediums such as phase change material particulate employing hollow glass micropearl are as the matrix of phase change material, and the butyl stearate mixture is as phase change material, and coating materials such as fluoropolymer resin are as the package surface material.Adopt the method for blend, the butyl stearate of modification is mixed with porous medium, cooling off afterwards, butyl stearate is embedded in the hollow glass micropearl.To stir in the adding of the material after the processing fluoropolymer resin glue, the cooling back coats the one layer of polymeric resin film.This phase change material particulate directly and import redispersible polymer rubber powder, high-quality low alkali cement, mineral filler and natural fiber mix according to a certain percentage, make phase change anticracking grout.Be applied in the heat-insulation system, utilize the latent heat of phase change of phase change material to carry out the storage of energy, the heat of absorbing environmental (cold) amount in the process that undergoes phase transition, when variation of ambient temperature, emit heat (cold) amount, reach the control outdoor environment temperature, reduce outdoor environment temperature to indoor influence, further reduce the heat transfer capacity of body of wall, thus the purpose of interior homo(io)thermism of holding chamber and saving air conditioning energy consumption.
This phase change anticracking grout mainly contains following advantage:
1, the phase change material particulate that is adopted all can be kept original solid shape before and after phase transformation, requirement to container is very low, greatly reduce the cost of phase-transition heat-storage, and the phase change material of this excellent performance can directly contact with heat-transfer medium, heat exchange efficiency is greatly improved.Can reduce simultaneously the body of wall deadweight, make the body of wall attenuation, increase the usable floor area in house.
2, the insulation heat-insulating property is good.Common bonding and plastering mortar since thermal conductivity greater than 0.9W/mk, so the heat insulation effect contribution to heat-insulation system is little, the hollow glass micropearl that will contain phase change material adds in the mortar, has reduced thermal conductivity on the one hand, and thermal conductivity can be reduced to 0.07W/mk.Utilize the latent heat of phase change of phase change material to carry out the storage of energy on the other hand, maximum latent heat of phase change is 170J/K, and being delivered to of making that heat can not be very fast is indoor, has reduced the influence to room temp.
3, add phase change material particulate in the mortar, utilize the thermal storage effect of phase change material to come the temperature of the hierarchy of control, store and the process that releases energy is almost carried out under constant temp.The transformation temperature of this phase change material is in 24～50 ℃ of scopes, when raising fusing, temperature absorbs heat, and emit heat when condensing when temperature reduces, outdoor temperature variation is regulated, add the buffer action of warming plate, played of the influence of further isolated external temperature, thereby utilized the energy more rationally and effectively indoor environment.Also can reduce the temperature fluctuation in the buildings simultaneously, improve indoor comfort level.The energy storage density and the thermo-efficiency of heat-insulation system have been improved.
4, nontoxic, harmless, environmental protection.
5, compare with traditional chemical energy storage, phase change material is added in the anticracking grout, energy storage technology is simple, easy to use.
6, this phase transformation mortar is applied widely, can combine with styrofoam, granular polystyrene, polyurethane sheet etc. to be applied in the energy-saving heat preserving system, also can be applied in energy-saving heat preserving system inner, external wall separately.
Embodiment
The preparation of phase change material:
Select Octadecane acid C for use
18H
36O
2Or n-hexadecane acid C
16H
32O
2With n-butyl stearate C
22H
44O
2Mixture as phase change material, described phase change material also can adopt lauryl alcohol separately, hexalin, the trimethyl carbinol, the mixture of beeswax etc. or this different materials is as phase change material.Gac, hollow glass micropearl, porous materials such as pearlstone be as body material, polymer cement, and Resins, epoxy, urethane resin, acrylic resin, silicone resin, polymer latexs etc. are as coating material.With the Octadecane acid of certain proportion cooperation or the mixture fusion at a certain temperature of n-hexadecane acid and butyl stearate, body material is poured into, pour out after stirring; Perhaps adopt phase change material powder and body material mechanically mixing, the phase change material powder is entered in the micropore of body material fully; Then the phase transformation particle is immersed in the polymer overmold material slurries and stirs, fully soak after 4-8 hour and take out.After being placed on following 24 hours polymer film forming dryings of room temperature environment, after mechanical mill, sieving, thereby make evengranular phase change material particulate.
Embodiment 1
With the Octadecane acid of certain proportion cooperation, the mixture of butyl stearate, Octadecane acid: butyl stearate=20: 80, after 80 ℃ of fusions, gac is poured into, pour out after mechanical stirring is even.Then finely dispersed phase transformation particle is immersed in polymeric compositions (epoxy glue, acrylate glue, polyurethane adhesive, the vinyl acetate between to for plastic glue etc.) slurries and stirs, fully soak after 4 hours and take out.After being placed on following 24 hours polymer film forming dryings of room temperature environment, after mechanical mill becomes single-size, sieving, thereby make evengranular phase change material particulate.The transformation temperature of this kind phase change material is 30 ℃～40 ℃, is applicable to the outer body of wall of cold district residential building.
Embodiment 2: with the n-hexadecane acid that certain proportion cooperates, the mixture of butyl stearate, n-hexadecane acid: butyl stearate=20: 80.After 65 ℃ of fusions, gac is poured into, pour out after mechanical stirring is even.Then finely dispersed phase transformation particle is immersed in the polymeric compositions slurries and stirs, fully soak after 4 hours and take out.After being placed on following 24 hours polymer film forming dryings of room temperature environment, after mechanical mill becomes single-size, sieving again, thereby make evengranular phase change material particulate.The transformation temperature of this kind phase change material is 20 ℃～30 ℃, is applicable to outer body of wall of severe cold area residential building or residential building indoor wall.
Embodiment 3: with the Octadecane acid that certain proportion cooperates, the mixture of butyl stearate, Octadecane acid: butyl stearate=80: 20.After mechanical mill becomes the nano-scale phase-changing material powder, with the pearlstone mechanically mixing, mix powder is fully entered in the micropore of pearlstone, finely dispersed phase transformation particle is immersed in the polymkeric substance glue stirs then, fully soak after 8 hours and take out.After treating the dry film forming of polymkeric substance, after mechanical mill becomes single-size, sieve again, thereby make phase change material particulate.The transformation temperature of this kind phase change material is 40 ℃～50 ℃, is applicable to the outer body of wall of hot summer and warm winter region residential building.
Embodiment 4: with the n-hexadecane acid that certain proportion cooperates, the mixture of butyl stearate, n-hexadecane acid: butyl stearate=80: 20.After mechanical mill becomes the nano-scale phase-changing material powder, with the hollow glass micropearl mechanically mixing, mix powder is fully entered in the micropore of hollow glass micropearl, finely dispersed phase transformation particle is immersed in the polymkeric substance glue stirs then, fully soak after 8 hours and take out.After treating the dry film forming of polymkeric substance, after mechanical mill becomes single-size, sieve again, thereby make phase change material.The transformation temperature of this kind phase change material is 35 ℃～45 ℃, is applicable to the outer body of wall of Xia Redong cryogenic region residential building.
The phase change material that aforesaid method is prepared mixes evenly with import redispersible polymer rubber powder, high-quality low alkali cement, mineral filler and natural fiber, prepare the phase transformation mortar by weight, ratio is as follows: phase change material 10～50%, import redispersible polymer rubber powder 1～3%, high-quality low alkali cement 20～30%, mineral filler 50～70%, natural fiber 2～10% can obtain phase change anticracking grout.
Constructional method
Adopt packing technology, the method for on-the-spot preparation is poured phase change anticracking grout and water in stirred vessel mixing and stirring in 1.25～2.5 ratio during construction, can construct.
Particular product performance parameters
The performance perameter of phase change material particulate
| Test subject | Performance index |
| Transformation temperature (operating temperature range) ℃ | 20～50 |
| Latent heat of phase change J/g | 100～170 |
| Charge and discharge heat cycle (inferior) | ＞4000 |
The phase change anticracking grout performance perameter
| Test subject | Performance index | |
| Stretching bonding strength (with warming plate) | Former intensity | 〉=0.1MPa destroys the interface on warming plate |
| Water-fast | 〉=0.1MPa destroys the interface on warming plate | |
| Freeze-thawing resistant | 〉=0.1MPa destroys the interface on warming plate | |
| Snappiness | Backfin is than (cement based) | ≤3.0 |
| Cracking strain (non-cement based) | ≥1.5 | |
| Operable time | 1.5～4.0h | |
Claims (10)
1, a kind of phase change anticracking grout, comprise mixed uniformly polymer glue powder, low alkali cement, mineral filler and natural fiber, it is characterized in that, also be mixed with weight ratio and be 10%～50% phase change material particulate, described phase change material particulate is body material with the porous medium, be filled with phase change material in the micropore of described porous medium, the outside surface of described porous medium is provided with the polymer overmold material.
2, phase change anticracking grout according to claim 1 is characterized in that, described phase change material is Octadecane acid/n-hexadecane acid and the mixture of n-butyl stearate.
3, as phase change anticracking grout as described in the claim 2, it is characterized in that described Octadecane acid/n-hexadecane acid: the proportioning of n-butyl stearate is 20～80: 80～20.
4, phase change anticracking grout according to claim 1 is characterized in that described porous medium is glass microballon, activated carbon or pearlstone.
5, a kind of method for preparing the phase change material particulate in the claim 1,
A, the phase change material heating and melting is made the phase change material liquation;
B, porous medium is poured in the described phase change material liquation, and carried out mechanical stirring, described phase change material liquation is fully entered in the micropore of described porous medium, then porous medium is taken out;
C, the rapid resulting porous medium of previous step is put into the polymer overmold material solution, soak after 4～8 hours and take out;
D, the porous medium of polymer overmold material coating is at room temperature dry makes the polymer overmold material filming;
E, become single-size, sieve then, obtain uniform phase change material particulate through mechanical mill.
6, method as claimed in claim 5 is characterized in that, described a, and the b step can replace with following method, and a step is for to become the nano phase change material powder with phase change material mechanical mill; The b step is with described phase change material powder and porous medium mechanically mixing, and described phase change material powder is fully entered in the micropore of described porous medium, then porous medium is taken out.
As claim 5 or 6 described methods, it is characterized in that 7, the phase change material in the described a step is the mixture of Octadecane acid or n-hexadecane acid and n-butyl stearate.
8, method as claimed in claim 7 is characterized in that, described Octadecane acid is 20～80: 80～20 with n-butyl stearate/n-hexadecane acid with the proportioning of n-butyl stearate.
As claim 5 or 6 described methods, it is characterized in that 9, the porous medium in the described b step is glass microballon, activated carbon or pearlstone.
As claim 5 or 6 described methods, it is characterized in that 10, described polymer overmold material comprises polymer cement, Resins, epoxy, urethane resin, acrylic resin, silicone resin or polymer latex.
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| CNB2006100991921A CN100387544C (en) | 2006-08-02 | 2006-08-02 | Phase change anticracking grout and preparation method of used phase change material particulate |
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| CN1903781A true CN1903781A (en) | 2007-01-31 |
| CN100387544C CN100387544C (en) | 2008-05-14 |
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