CN107541106A - A kind of solar energy hot coating and preparation method thereof and the Solar wall based on coating - Google Patents
A kind of solar energy hot coating and preparation method thereof and the Solar wall based on coating Download PDFInfo
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- CN107541106A CN107541106A CN201710777466.6A CN201710777466A CN107541106A CN 107541106 A CN107541106 A CN 107541106A CN 201710777466 A CN201710777466 A CN 201710777466A CN 107541106 A CN107541106 A CN 107541106A
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Abstract
It is made up of successively substrate, solar energy thermal transition coating for selective absorption, tack coat and super-hydrophobic coat from bottom to up with the Solar wall based on coating, solar energy hot coating the invention discloses a kind of solar energy hot coating and preparation method thereof.The compounding method of coating includes：One layer of organic silica gel is coated as tack coat；Coat one layer of super-hydrophobic coat；Super-hydrophobic solar energy hot coating is dried to obtain at a temperature of normal temperature.Solar wall based on coating includes：Solar energy hot coating, rack shell, inlet of cold air and hot air outlet；Inlet of cold air is arranged on solar energy hot coating；Hot air outlet is arranged on wall；Solar energy hot coating is arranged on exterior wall by rack shell；The advantage of the invention is that：With self-cleaning function, collecting efficiency when Solar wall is long-term use of out of doors ensure that；Improve coating adhesion, the wearability on surface, performance and used life.
Description
Technical field
The present invention relates to application of solar energy field, more particularly to a kind of solar energy hot coating and preparation method thereof further relates to
Solar wall based on the coating.
Background technology
Sun wall system is a kind of new type solar collecting system to be combined together with building structure, and it can be by the sun
The air of heating is in an organized way transported to interior, replaces foul indoor air, the dual-use function with heating and ventilation.Solar wall
System core component is solar wallboard, and it is to plate solar energy hot coating in steel plate or surface of aluminum plate, and is onboard installed with perhaps
More small slit, by made of particular design and working process, heat energy can be converted solar energy into greatest extent.
Research of the China earliest to Solar wall is based on traditional flat plate collector, and what is studied later is Trombe walls, but
It is that these collecting systems all be present, i.e., on wall face plus glass cover-plate not only adds cost, and exists easy
It is broken, not easy cleaning, influence it is attractive in appearance the problems such as；Meanwhile absorption and reflection of the glass cover-plate to incident sunshine are to a certain extent
It has impact on collecting efficiency.The refractive index of glass is 1.5, and 8% reflection loss is had in air/glass interface, meanwhile, glass sheet
Body can have certain absorption to sunshine.Therefore, how to reduce or eliminate absorption of the transparent cover plate to incident sunshine and
Reflection is one of to need to solve the problems, such as.Based on this, people attempt the directly use of removal glass cover-plate and are coated with solar energy optical-thermal
The steel plate or aluminium sheet of coating, however, in actual applications, outdoor environment is very severe, it is coated with the steel of solar energy hot coating
Can constantly there are dust accretions on plate or aluminium sheet so that the photo-thermal conversion efficiency of solar energy hot coating reduces, and then have impact on
The collecting efficiency of system, therefore, the accumulation of surface dirt how is reduced, realize the self-cleaning function of Solar wall, be to need badly at present
One of problem of solution.
The content of the invention
A kind of present invention the defects of being directed to prior art, there is provided solar energy hot coating and preparation method thereof and based on painting
The Solar wall of layer, can effectively solve the problem that the above-mentioned problems of the prior art.
In order to realize above goal of the invention, the technical scheme that the present invention takes is as follows：
A kind of super-hydrophobic solar energy hot coating, from bottom to up successively by substrate, solar energy thermal transition selective absorbing
Coating, tack coat and super-hydrophobic coat composition；
Described solar energy thermal transition coating for selective absorption can to the absorptivity of the sun in 300~2500nm wave bands
Up to more than 0.9；Described super-hydrophobic coat is not less than 150 ° to the contact angle of water, and it uses silicon fluoride or silicon with low-surface-energy
The silica sol coating of oxygen alkane modified forms；
Described super-hydrophobic coat from tetraethyl orthosilicate as presoma, ammoniacal liquor as catalyst, ethanol as solvent,
The colloidal sol of silica nanosphere is obtained, is modified afterwards with the silicon fluoride or siloxanes of low-surface-energy, obtains super-hydrophobic
Colloidal sol；
Preferably, the percent by volume of tetraethyl orthosilicate is about 1%~10%, the volume of the ammonia spirit containing ammonia 30%
Percentage is 1%~15%, and the percent by volume of absolute ethyl alcohol is 70~95%.
Preferably, the particle size of the silica sol of described super-hydrophobic coat is 5nm~500nm.
Preferably, carbon number >=4 of the fluoro-containing group of the described silicon fluoride with low-surface-energy, the branch of siloxanes
Carbon atom quantity >=4 of chain length.
Preferably, the thickness of described tack coat is 1nm~30nm.
The invention also discloses the preparation process of super-hydrophobic solar energy hot coating is as follows：
S1：Spraying, blade coating, spin coating are used on the aluminium substrate solar energy hot-cast socket coating for selective absorption of cleaning or is carried
The mode of drawing coats one layer of organic silica gel as tack coat, stands 1 minute~1 hour；
S2：The SiO of one layer of super-hydrophobic is coated by the way of spraying, blade coating, spin coating or lifting again2Colloidal sol is as super thin
Water coating；
S3：Finally dried 1 minute~2 hours at a temperature of normal temperature~80 DEG C, you can obtain super-hydrophobic solar energy optical-thermal
Coating.
Further, the hydrophobic type SiO2The preparation method of colloidal sol is as follows：By tetraethyl orthosilicate and ammonia containing ammonia 30%
Water is separately added into absolute ethyl alcohol, and ultrasonic 10min makes it be sufficiently mixed uniformly respectively, and finely dispersed tetraethyl orthosilicate is anhydrous
Alcohol mixed solution is added in ammoniacal liquor absolute ethyl alcohol mixed solution, at normal temperatures magnetic agitation 1h；Obtained colloidal sol is poured into
In beaker, normal temperature lower open mouth magnetic agitation, eliminate the ammonia in colloidal sol, to ensure the stability of colloidal sol.To obtained colloidal sol
The middle mass ratio that adds is 1% 1H, 1H, 2H, 2H- perfluoro capryl triethoxysilanes, magnetic agitation 2h under normal temperature, obtains hydrophobic
The SiO of type2Colloidal sol.
Further, the percent by volume of the tetraethyl orthosilicate and ammoniacal liquor is 5.83%.
The invention also discloses a kind of Solar wall based on super-hydrophobic solar energy hot coating, including：Super-hydrophobic solar energy
Photo-thermal coating, rack shell, inlet of cold air and hot air outlet；Described inlet of cold air is arranged on super-hydrophobic solar energy
On hot coating；Described hot air outlet is arranged on wall；Super-hydrophobic solar energy hot coating is arranged on by rack shell
On exterior wall；The Solar wall is indoor offer hot-air by wind endless form, and air is passed into by inlet of cold air
Super-hydrophobic solar energy hot coating heats air, is got in from hot air outlet.
Further, its wind endless form can be passive type and active two kinds.
Further, the passive type Solar wall includes：Super-hydrophobic solar energy hot coating, wall, inlet of cold air, heat
Air outlet slit, rack shell；Super-hydrophobic solar energy hot coating is fixed on towards on the wall in south by rack shell, and super thin
There are many apertures on water solar photo-thermal coating, as inlet of cold air, have hole as hot air outlet on wall.
Further, the active Solar wall mainly includes：Super-hydrophobic solar energy hot coating, wall, cold air enter
Mouth, hot air outlet, rack shell, blower fan；Super-hydrophobic solar energy hot coating is fixed on the wall towards south by rack shell
On, and have many narrow slots on super-hydrophobic solar energy hot coating, as inlet of cold air, there is hole as hot-air on wall
Outlet, blower fan are located in hot air outlet.
Compared with prior art the advantage of the invention is that：
1. there is self-cleaning function；Super-hydrophobic coat is applied on selectively absorbing layers so that falls the dust on its surface
It can easily be disposed by rainwater or natural wind, thereby may be ensured that collection thermal effect when Solar wall is long-term use of out of doors
Rate.
2. the addition of tack coat, improve attached between super-hydrophobic coat and solar energy thermal transition coating for selective absorption
Put forth effort, and add the wearability on surface, improve the mechanical performance of coating on the whole, extend super-hydrophobic solar energy optical-thermal
The service life of coating.
Brief description of the drawings
Fig. 1 is the structural representation of the super-hydrophobic solar energy hot coating of the embodiment of the present invention；
Fig. 2 is the surface surface sweeping Electronic Speculum schematic diagram of the super-hydrophobic solar energy hot coating of the embodiment of the present invention；
Fig. 3 is the contact angle schematic diagram of 5 μ L water droplets of the super-hydrophobic solar energy hot coating of the embodiment of the present invention；
Fig. 4 is the schematic diagram for exempting from clean type passive type Solar wall in the embodiment of the present invention；
Fig. 5 is the schematic diagram for exempting from the active Solar wall of clean type in the embodiment of the present invention.
Description of reference numerals：
1st, super-hydrophobic solar energy hot coating, 2, substrate, 3, solar energy thermal transition coating for selective absorption, 4, bond
Layer, 5, super-hydrophobic coat, 6, wall, 7, inlet of cold air, 8, hot air outlet, 9, rack shell, 10, blower fan.
Embodiment
For the objects, technical solutions and advantages of the present invention are more clearly understood, develop simultaneously embodiment referring to the drawings, right
The present invention is described in further details.
As shown in figure 1, a kind of super-hydrophobic solar energy hot coating, from bottom to up successively by substrate 2, solar energy thermal transition
Coating for selective absorption 3, tack coat 4 and super-hydrophobic coat 5 form；
The preparation process of shown super-hydrophobic solar energy hot coating is as follows：
S1：On the aluminium substrate solar energy hot-cast socket coating for selective absorption of cleaning one layer is coated by the way of spraying
Organic silica gel stands 10 minutes as tack coat；
S2：The SiO of one layer of super-hydrophobic is coated by the way of spraying again2Colloidal sol is as super-hydrophobic coat；
S3：Finally dry 30 minutes at normal temperatures, you can obtain super-hydrophobic solar energy hot coating.
Wherein hydrophobic type SiO2The preparation method of colloidal sol is as follows：By a certain amount of tetraethyl orthosilicate and ammoniacal liquor containing ammonia 30%
It is separately added into a certain amount of absolute ethyl alcohol, ultrasonic 10min makes it be sufficiently mixed uniformly respectively, by finely dispersed positive silicic acid second
Ester waterless alcohol mixed solution is added in ammoniacal liquor absolute ethyl alcohol mixed solution, at normal temperatures magnetic agitation 1h；It is molten by made from
Glue is poured into beaker, normal temperature lower open mouth magnetic agitation, eliminates the ammonia in colloidal sol, to ensure the stability of colloidal sol.To obtaining
Colloidal sol in add the 1H, 1H, 2H that mass ratio is 1%, 2H- perfluoro capryl triethoxysilanes, magnetic agitation 2h under normal temperature, obtain
To the SiO of hydrophobic type2Colloidal sol.
The percent by volume of the tetraethyl orthosilicate and ammoniacal liquor is 5.83%.
As shown in Fig. 2 the surface surface sweeping electromicroscopic photograph of super-hydrophobic solar energy hot coating；
As shown in figure 3, the contact angle of the 5 μ L water droplets for its surface, contact angle is up to 157 °, i.e., surface is super-hydrophobic shape
State.
When dust falls on its surface, dust can be disposed by the method for rainwater or natural wind, it is achieved thereby that super
The self-cleaning function on the surface of hydrophobic solar energy hot coating, it ensure that collecting efficiency during its long-term application out of doors.In addition,
Tack coat is added in the coating of this structure, improves super-hydrophobic coat and solar energy thermal transition selectivity to a certain extent
Adhesive force between absorber coatings, and the wearability on surface is added, the mechanical performance of coating is improved on the whole, is extended
The service life of super-hydrophobic solar energy hot coating.
As shown in figure 4, a kind of exempt from clean type passive type Solar wall based on super-hydrophobic solar energy hot coating, it is mainly wrapped
Include super-hydrophobic solar energy hot coating 1, wall 6, inlet of cold air 7, hot air outlet 8, rack shell 9；Super-hydrophobic solar energy
Photo-thermal coating 1 is fixed on towards on the wall 6 in south by rack shell, and is had on super-hydrophobic solar energy hot coating 1 many small
Hole, as inlet of cold air 7, there is hole on wall as hot air outlet 8.
Its course of work is that outdoor cold air enters from inlet of cold air 7, in the presence of solar radiation, by super
Hydrophobic solar energy hot coating heats air, and obtained hot-air leads to interior by the hot air outlet 8 on wall 6, from
And it can be indoor offer hot-air.
As shown in figure 5, a kind of exempt from the active Solar wall of clean type based on super-hydrophobic solar energy hot coating, it is mainly wrapped
Include super-hydrophobic solar energy hot coating 1, wall 6, inlet of cold air 7, hot air outlet 8, rack shell 9, blower fan 10；It is super-hydrophobic
Solar energy hot coating 1 is fixed on towards on the wall 6 in south by rack shell, and is had on super-hydrophobic solar energy hot coating 1
Many narrow slots, as inlet of cold air 7, there is hole to be located at as hot air outlet 8, blower fan 10 8 in hot air outlet on wall.
Its course of work is, in the presence of solar radiation, the temperature of super-hydrophobic solar energy hot coating 1 raises rapidly,
Under the swabbing action of blower fan 10, negative pressure is formed in cavity, outdoor fresh cold air enters from inlet of cold air 7, by super thin
Water solar photo-thermal coating heats air, and the hot-air after heating is aspirated through on wall 6 on the top of cavity by blower fan 10
Hot air outlet 8 lead to interior, so as to be indoor offer hot-air.
One of ordinary skill in the art will be appreciated that embodiment described here is to aid in reader and understands this hair
Bright implementation, it should be understood that protection scope of the present invention is not limited to such especially statement and embodiment.Ability
The those of ordinary skill in domain can be made according to these technical inspirations disclosed by the invention it is various do not depart from essence of the invention its
Its various specific deformations and combination, these deformations and combination are still within the scope of the present invention.
Claims (10)
- A kind of 1. super-hydrophobic solar energy hot coating, it is characterised in that：Selected successively by substrate, solar energy thermal transition from bottom to up Selecting property absorber coatings, tack coat and super-hydrophobic coat composition；Described solar energy thermal transition coating for selective absorption is in 300~2500nm wave bands to the absorptivity of the sun up to 0.9 More than；Described super-hydrophobic coat is not less than 150 ° to the contact angle of water, and super-hydrophobic coat is from tetraethyl orthosilicate as forerunner Body, ammoniacal liquor obtain the colloidal sol of silica nanosphere, afterwards with the fluorine silicon of low-surface-energy as catalyst, ethanol as solvent Alkane or siloxanes are modified, and obtain the colloidal sol of super-hydrophobic；The particle size of the colloidal sol is 5nm~500nm.
- A kind of 2. super-hydrophobic solar energy hot coating according to claim 1, it is characterised in that：The tetraethyl orthosilicate Percent by volume is about 1%~10%, and the percent by volume of the ammonia spirit containing ammonia 30% is 1%~15%, absolute ethyl alcohol Percent by volume is 70~95%.
- A kind of 3. super-hydrophobic solar energy hot coating according to claim 1, it is characterised in that：It is described that there is low-surface-energy Silicon fluoride fluoro-containing group carbon number >=4, carbon atom quantity >=4 of the branch lengths of siloxanes.
- A kind of 4. super-hydrophobic solar energy hot coating according to claim 1, it is characterised in that：The thickness of described tack coat Spend for 1nm~30nm.
- 5. a kind of preparation method of super-hydrophobic solar energy hot coating, it is characterised in that comprise the following steps：S1：Using spraying, blade coating, spin coating or lifting on the aluminium substrate solar energy hot-cast socket coating for selective absorption of cleaning Mode coats one layer of organic silica gel as tack coat, stands 1 minute~1 hour；S2：The SiO of one layer of super-hydrophobic is coated by the way of spraying, blade coating, spin coating or lifting again2Colloidal sol is as super-hydrophobic painting Layer；S3：Finally dried 1 minute~2 hours at a temperature of normal temperature~80 DEG C, you can obtain super-hydrophobic solar energy hot coating.
- 6. the preparation method of a kind of super-hydrophobic solar energy hot coating according to claim 5, it is characterised in that described to dredge Water type SiO2The preparation method of colloidal sol is as follows：Tetraethyl orthosilicate and the ammoniacal liquor containing ammonia 30% are separately added into absolute ethyl alcohol, point Not ultrasonic 10min makes it be sufficiently mixed uniformly, and finely dispersed tetraethyl orthosilicate absolute ethyl alcohol mixed solution is added into ammoniacal liquor In absolute ethyl alcohol mixed solution, magnetic agitation 1h at normal temperatures；Obtained colloidal sol is poured into beaker, normal temperature lower open mouth magnetic force stirs Mix, eliminate the ammonia in colloidal sol, to ensure the stability of colloidal sol；The 1H that mass ratio is 1% is added into obtained colloidal sol, 1H, 2H, 2H- perfluoro capryl triethoxysilane, magnetic agitation 2h under normal temperature, obtain the SiO of hydrophobic type2Colloidal sol；The positive silicon The percent by volume of acetoacetic ester and ammoniacal liquor is 5.83%.
- A kind of 7. Solar wall based on super-hydrophobic solar energy hot coating, it is characterised in that including：Super-hydrophobic solar energy optical-thermal applies Layer, rack shell, inlet of cold air and hot air outlet；Described inlet of cold air is arranged on super-hydrophobic solar energy hot coating On；Described hot air outlet is arranged on wall；Super-hydrophobic solar energy hot coating is arranged on exterior wall by rack shell On；The Solar wall is indoor offer hot-air by wind endless form, and air is passed into super-hydrophobic by inlet of cold air Solar energy hot coating heats air, is got in from hot air outlet.
- A kind of 8. Solar wall based on super-hydrophobic solar energy hot coating according to claim 7, it is characterised in that：It is described Wind endless form is passive type and active two kinds.
- A kind of 9. Solar wall based on super-hydrophobic solar energy hot coating according to claim 8, it is characterised in that：It is described Passive type Solar wall includes：Super-hydrophobic solar energy hot coating, wall, inlet of cold air, hot air outlet, rack shell；It is super Hydrophobic solar energy hot coating is fixed on towards on the wall in south by rack shell, and is had on super-hydrophobic solar energy hot coating Many apertures, as inlet of cold air, there is hole as hot air outlet on wall.
- A kind of 10. Solar wall based on super-hydrophobic solar energy hot coating according to claim 9, it is characterised in that：Institute Stating active Solar wall mainly includes：Super-hydrophobic solar energy hot coating, wall, inlet of cold air, hot air outlet, outside support Shell, blower fan；Super-hydrophobic solar energy hot coating is fixed on towards on the wall in south by rack shell, and super-hydrophobic solar energy There are many narrow slots on hot coating, as inlet of cold air, there is hole to go out as hot air outlet, blower fan positioned at hot-air on wall In mouthful.
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Cited By (11)
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| CN109161241A (en) * | 2018-08-21 | 2019-01-08 | 哈尔滨工业大学（威海） | A kind of radiative cooling coating and preparation method thereof with self-cleaning function |
| CN109630996A (en) * | 2019-01-25 | 2019-04-16 | 上海交通大学 | A kind of high-efficiency solar steam generator based on interface evaporation |
| CN109630995A (en) * | 2019-01-25 | 2019-04-16 | 上海交通大学 | A kind of device generating high-temperature steam based on Driven by Solar Energy under environmental pressure |
| CN109651853A (en) * | 2018-12-04 | 2019-04-19 | 哈尔滨工业大学（深圳） | Stable MoSi in a kind of high temperature air2-SiO2Compound photo-thermal coating and preparation method thereof |
| CN109705645A (en) * | 2018-12-10 | 2019-05-03 | 上海卫星装备研究所 | Satellite sun substrate surface glass mould second surface mirror thermal control coating and preparation method |
| CN110105871A (en) * | 2019-06-04 | 2019-08-09 | 东北林业大学 | A kind of preparation method pressing down ice coating using iron copper manganese Metal salt and nano silica as the super-hydrophobic photo-thermal of raw material |
| CN110903684A (en) * | 2018-09-18 | 2020-03-24 | 广东美的白色家电技术创新中心有限公司 | Dustproof coating composition and preparation method and application thereof |
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| CN112592690A (en) * | 2020-12-30 | 2021-04-02 | 南京健翔新材料科技有限公司 | Preparation method of ethyl orthosilicate binder |
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| CN109161241A (en) * | 2018-08-21 | 2019-01-08 | 哈尔滨工业大学（威海） | A kind of radiative cooling coating and preparation method thereof with self-cleaning function |
| CN110903684A (en) * | 2018-09-18 | 2020-03-24 | 广东美的白色家电技术创新中心有限公司 | Dustproof coating composition and preparation method and application thereof |
| CN110928166B (en) * | 2018-09-20 | 2021-05-04 | Eta瑞士钟表制造股份有限公司 | Component for high quality factor resonator made of micro-machinable material |
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| CN109651853A (en) * | 2018-12-04 | 2019-04-19 | 哈尔滨工业大学（深圳） | Stable MoSi in a kind of high temperature air2-SiO2Compound photo-thermal coating and preparation method thereof |
| CN109705645A (en) * | 2018-12-10 | 2019-05-03 | 上海卫星装备研究所 | Satellite sun substrate surface glass mould second surface mirror thermal control coating and preparation method |
| CN109630995A (en) * | 2019-01-25 | 2019-04-16 | 上海交通大学 | A kind of device generating high-temperature steam based on Driven by Solar Energy under environmental pressure |
| CN109630996A (en) * | 2019-01-25 | 2019-04-16 | 上海交通大学 | A kind of high-efficiency solar steam generator based on interface evaporation |
| CN110105871A (en) * | 2019-06-04 | 2019-08-09 | 东北林业大学 | A kind of preparation method pressing down ice coating using iron copper manganese Metal salt and nano silica as the super-hydrophobic photo-thermal of raw material |
| CN114479656A (en) * | 2020-11-11 | 2022-05-13 | 杭州三花研究院有限公司 | Coating, preparation method of coating, heat exchanger containing coating and preparation method of heat exchanger |
| CN114479656B (en) * | 2020-11-11 | 2024-05-03 | 杭州三花研究院有限公司 | Heat exchanger and preparation method thereof |
| CN112592690A (en) * | 2020-12-30 | 2021-04-02 | 南京健翔新材料科技有限公司 | Preparation method of ethyl orthosilicate binder |
| CN112592690B (en) * | 2020-12-30 | 2022-03-22 | 长盈新材料(烟台)有限公司 | Preparation method of ethyl orthosilicate binder |
| CN114226190A (en) * | 2021-12-29 | 2022-03-25 | 电子科技大学 | Photo-thermal condensation failure resistant super-hydrophobic surface with multi-layer structure and preparation method thereof |
| CN114226190B (en) * | 2021-12-29 | 2023-01-03 | 电子科技大学 | Photo-thermal condensation failure resistant super-hydrophobic surface with multi-layer structure and preparation method thereof |
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Application publication date: 20180105 |