CN112055429B - Infrared heating furred ceiling - Google Patents
Infrared heating furred ceiling Download PDFInfo
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- CN112055429B CN112055429B CN202010837284.5A CN202010837284A CN112055429B CN 112055429 B CN112055429 B CN 112055429B CN 202010837284 A CN202010837284 A CN 202010837284A CN 112055429 B CN112055429 B CN 112055429B
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 103
- 239000010410 layer Substances 0.000 claims abstract description 156
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 80
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 70
- 239000011247 coating layer Substances 0.000 claims abstract description 36
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 18
- 238000005507 spraying Methods 0.000 claims abstract description 16
- 239000010408 film Substances 0.000 claims abstract description 13
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 11
- 229920000642 polymer Polymers 0.000 claims abstract description 9
- 229910021383 artificial graphite Inorganic materials 0.000 claims abstract description 6
- 239000000835 fiber Substances 0.000 claims abstract description 5
- 239000003973 paint Substances 0.000 claims abstract description 5
- 239000004020 conductor Substances 0.000 claims abstract description 4
- 239000010409 thin film Substances 0.000 claims abstract description 4
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 3
- 239000004917 carbon fiber Substances 0.000 claims abstract description 3
- 238000004321 preservation Methods 0.000 claims description 8
- 238000007493 shaping process Methods 0.000 claims description 7
- -1 benzoic acid peroxide Chemical class 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 6
- 238000006722 reduction reaction Methods 0.000 claims description 6
- 239000003431 cross linking reagent Substances 0.000 claims description 4
- 150000002978 peroxides Chemical class 0.000 claims description 4
- 229920002239 polyacrylonitrile Polymers 0.000 claims description 4
- DMWVYCCGCQPJEA-UHFFFAOYSA-N 2,5-bis(tert-butylperoxy)-2,5-dimethylhexane Chemical compound CC(C)(C)OOC(C)(C)CCC(C)(C)OOC(C)(C)C DMWVYCCGCQPJEA-UHFFFAOYSA-N 0.000 claims description 3
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 claims description 3
- WFUGQJXVXHBTEM-UHFFFAOYSA-N 2-hydroperoxy-2-(2-hydroperoxybutan-2-ylperoxy)butane Chemical compound CCC(C)(OO)OOC(C)(CC)OO WFUGQJXVXHBTEM-UHFFFAOYSA-N 0.000 claims description 3
- 239000005995 Aluminium silicate Substances 0.000 claims description 3
- 239000004642 Polyimide Substances 0.000 claims description 3
- 235000012211 aluminium silicate Nutrition 0.000 claims description 3
- 239000010426 asphalt Substances 0.000 claims description 3
- 239000010433 feldspar Substances 0.000 claims description 3
- 239000002223 garnet Substances 0.000 claims description 3
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 239000010445 mica Substances 0.000 claims description 3
- 229910052618 mica group Inorganic materials 0.000 claims description 3
- 229920001721 polyimide Polymers 0.000 claims description 3
- 239000005711 Benzoic acid Substances 0.000 claims description 2
- WPYMKLBDIGXBTP-UHFFFAOYSA-N Benzoic acid Natural products OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 claims description 2
- 229910021536 Zeolite Inorganic materials 0.000 claims description 2
- 235000010233 benzoic acid Nutrition 0.000 claims description 2
- 239000003638 chemical reducing agent Substances 0.000 claims description 2
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 2
- 239000010457 zeolite Substances 0.000 claims description 2
- 238000001723 curing Methods 0.000 claims 2
- 230000005855 radiation Effects 0.000 abstract description 32
- 241000282414 Homo sapiens Species 0.000 abstract description 9
- 238000005265 energy consumption Methods 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 13
- 230000000694 effects Effects 0.000 description 12
- 239000011248 coating agent Substances 0.000 description 11
- 238000000576 coating method Methods 0.000 description 11
- 239000000463 material Substances 0.000 description 11
- 238000001069 Raman spectroscopy Methods 0.000 description 4
- 229910002804 graphite Inorganic materials 0.000 description 4
- 239000010439 graphite Substances 0.000 description 4
- 239000002052 molecular layer Substances 0.000 description 4
- 239000011858 nanopowder Substances 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 238000001931 thermography Methods 0.000 description 4
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000004134 energy conservation Methods 0.000 description 3
- 230000004927 fusion Effects 0.000 description 3
- 238000004528 spin coating Methods 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000004005 microsphere Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000009998 heat setting Methods 0.000 description 1
- 239000002120 nanofilm Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- XCRBXWCUXJNEFX-UHFFFAOYSA-N peroxybenzoic acid Chemical compound OOC(=O)C1=CC=CC=C1 XCRBXWCUXJNEFX-UHFFFAOYSA-N 0.000 description 1
- 230000000191 radiation effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
- H05B3/12—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material
- H05B3/14—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material the material being non-metallic
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D13/00—Electric heating systems
- F24D13/02—Electric heating systems solely using resistance heating, e.g. underfloor heating
- F24D13/022—Electric heating systems solely using resistance heating, e.g. underfloor heating resistances incorporated in construction elements
- F24D13/024—Electric heating systems solely using resistance heating, e.g. underfloor heating resistances incorporated in construction elements in walls, floors, ceilings
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
- H05B3/34—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs
- H05B3/36—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs heating conductor embedded in insulating material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2200/00—Heat sources or energy sources
- F24D2200/08—Electric heater
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Resistance Heating (AREA)
Abstract
The invention discloses an infrared heating ceiling which is composed of a conductive layer and an infrared coating layer; the conducting layer is a carbon-based conducting material and comprises a thin film formed by spraying graphene conducting paint, an artificial graphite film, a carbon tube film, carbon fibers, graphene fibers and the like. The infrared coating layer is assembled on the surface of the conductive layer through the centrifugal spiral coating layer, and the infrared heating suspended ceiling is obtained through curing. The infrared coating layer takes a polysilicate layer as a bottom insulating layer, a silicon carbide layer as a middle layer and an insulating layer, a graphitizable polymer layer as an upper layer and a rivet fixing layer, and spherical graphene penetrates through the three-layer structure. The size of the spherical graphene is 2-8 mu m, and the total thickness of a three-layer structure consisting of a bottom layer, a middle layer and an upper layer is not more than 1/3 of the size of the spherical graphene; the thickness of the upper layer is less than 10nm. The infrared heating ceiling greatly improves the heating efficiency, increases the comfort of a human body in the field of infrared radiation heating, and greatly reduces the energy consumption.
Description
Technical Field
The invention belongs to the technical field of infrared radiation, and particularly relates to an infrared heating ceiling.
Background
Along with the development of society, the dependence of human beings on energy is higher and higher, but along with the gradual consumption of fossil energy, the cost of energy is higher and higher, and for this reason, the more efficient utilization of energy in human life production activities is urgent. Meanwhile, the quality requirements of people on production and life are higher and higher, and the comfort becomes the first choice under the same energy source condition.
At present, electric heating equipment in life is mainly heat conduction type heating equipment such as hot filaments and hot oil, so that the electric power consumption is huge, and the heating range is small; meanwhile, the infrared radiation wavelength is short, and the human body comfort is poor.
The interface heating is mainly surface heating of high radiation materials, such as pure silicon carbide, carbon tubes, etc. But the emissivity has reached the conventional heating limit (infrared emissivity 95%). To further enhance heating, the heating principle of heat conduction and convection, etc. must be introduced and well applied.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an infrared heating ceiling which has a multi-stage heating structure, realizes infrared radiation heating by reasonably designing a material stacking structure of an infrared coating, provides a feasible scheme for reducing the temperature of an interface material, and has the advantages of high energy conversion efficiency, rapid large-area heating, strong human body comfort and the like by spraying the infrared heating ceiling on the surface of a carbon-based conductive material.
The purpose of the invention is realized by the following technical scheme: the infrared heating suspended ceiling is composed of a conductive layer and an infrared coating layer; the conducting layer is a carbon-based conducting material and comprises a thin film, an artificial graphite film, a carbon tube film, carbon fibers, graphene fibers and the like which are formed by spraying graphene conducting paint. The infrared coating layer is assembled on the surface of the conductive layer through a centrifugal spin coating layer, and the infrared heating ceiling is obtained through curing. The infrared coating layer takes a polysilicate layer as a bottom insulating layer, a silicon carbide layer as a middle layer and an insulating layer, a graphitizable polymer layer as an upper layer and a rivet fixing layer, and spherical graphene penetrates through the three-layer structure. The size of the spherical graphene is 2-8 mu m, and the total thickness of a three-layer structure consisting of a bottom layer, a middle layer and an upper layer is not more than 1/3 of the size of the spherical graphene; the thickness of the upper layer is less than 10nm.
Further, the graphitizable polymer layer is composed of graphitizable polymer selected from polyimide, asphalt, or polyacrylonitrile with a molecular weight of 1000-8000.
Further, the polysilicate layer is feldspar (K) 2 O·Al 2 O 3 ·6SiO 2 ) Layer, mica (K) 2 O·2Al 2 O 3 ·6SiO 2 ·2H 2 O) layer, kaolin (Al) 2 O 3 ·2SiO 2 ·22H 2 O) layer, zeolite (Na) 2 O·Al 2 O 3 ·3SiO 2 ·22H 2 O) layer or garnet (3 CaO. Al) 2 O 3 ·3SiO 2 ) And (3) a layer.
Further, the silicon carbide layer is composed of hyperbranched carbosilane, the molecular weight of the silicon carbide layer is less than 7000, and the branching degree is 1.2-1.7.
Further, the preparation method of the infrared heating suspended ceiling comprises the following steps: uniformly mixing 1 part by weight of spherical graphene, 0.02-0.07 part by weight of graphitizable high-molecular oligomer, 2-4 parts by weight of polyaluminosilicate, 1-2 parts by weight of hyperbranched carbosilane and 0.01-0.2 part by weight of peroxide cross-linking agent, centrifugally spraying on the surface of the conductive layer, and heating and shaping after ultraviolet curing to obtain the infrared heating suspended ceiling. The temperature of the ultraviolet curing is 60-120 ℃, and the time is 1-6h.
Further, the peroxide crosslinking agents include, but are not limited to: dicumyl peroxide, methyl ethyl ketone peroxide, benzoic acid peroxide, 2, 5-dimethyl-2, 5 bis (t-butylperoxy) hexane.
Further, the spherical graphene is formed by spraying graphene oxide solution with the concentration of 0.1mg/mL-1mg/mL, and is obtained after chemical reduction and heat treatment at 1600-2000 ℃ for 0.1-4 hours. I of the spherical graphene D /I G The value is not higher than 0.05 and the wall thickness is less than 4 atomic layers.
Further, the centrifugal force of the centrifugation ranges from 2000 to 7000rcf.
Further, the specific method for heat setting is as follows: at the temperature of 0-250 ℃, the heating speed is less than 5 ℃/min, and the heat preservation is controlled for 1-2h; then heating to 500 ℃, wherein the heating speed is less than 5 ℃/min, and keeping the temperature for 1-2h; then the temperature is quickly raised to 1300 ℃, the temperature raising speed is higher than 50 ℃/min, and the temperature is controlled for 1-5min.
Compared with the prior art, the invention has the following beneficial effects: firstly, the layer-by-layer directional assembly of the coating material is realized by a centrifugal spraying mode according to different material densities, and finally, infrared radiation heating is realized; secondly, the polyaluminosilicate layer plays a role in isolating the conductive heating material, so that the conductive heating material is protected, the external damage and electric leakage are isolated, and the safety is enhanced; on the other hand, heat is transferred to the high-emissivity silicon carbide layer. The silicon carbide layer plays an insulating role to protect the conductive heating material, and on the other hand, the silicon carbide layer quickly radiates heat to the outside in a radiation mode. The graphitizable high molecular layer is a carbonizable nano film actually, and the spherical graphene and the silicon carbide are linked to play a role of a rivet; spherical graphene has three functions: firstly, heat is guided out from an interface to spherical graphene with a high specific surface area, secondly, the spherical graphene has high radiance and can radiate heat quickly and efficiently, the radiation effect of silicon carbide is greatly enhanced, thirdly, the surface of the spherical graphene has a small number of defect state structures, and moreover, the temperature gradient of the surface of a heating material is enhanced by an external suspension structure, so that the spherical graphene can have a good heat convection effect with gas, and the heating effect of the material interface is further enhanced. In addition, the materials such as the high-temperature repaired graphene microspheres have excellent air oxidation resistance and can work for a long time at full power within 500 ℃, so that the high-temperature repaired graphene microspheres have good stability.
Due to the thickness design of the graphene ball and the three-layer structure, the thermal resistance effect of the interface layer is weakened as much as possible, the position of the graphene ball as a heat dissipation main body is increased, and the radiation, convection and heat conduction effects are improved. The thickness of the upper layer is less than 10nm, and the upper layer plays a role of a rivet and does not have excessive thermal resistance effect on the silicon carbide radiation layer. Therefore, the infrared radiation and suspended ceiling has the characteristics of energy conservation, high radiation and uniform heat dissipation. Simultaneously, because be the reason of furred ceiling, its radiation scope is wider, and heating efficiency is higher, can integrate to intelligent home systems.
Detailed Description
In order that the objects and effects of the invention will become more apparent, the invention will be further described with reference to specific examples.
Example 1
The invention provides an infrared heating ceiling which is composed of a conductive layer and an infrared coating layer; the conducting layer is a thin film formed by spraying graphene conductive paint. The infrared coating layer is assembled on the surface of the conductive layer through the centrifugal spiral coating layer, and the infrared heating suspended ceiling is obtained through curing. The preparation method comprises the following steps:
(1) Carrying out spray treatment on a graphene oxide solution with the concentration of 0.1mg/mL at 200 ℃, and carrying out HI reduction for 8h at 80 ℃ and reduction for 4h at 1600 ℃ to prepare the spherical graphene.
The detection of a scanning electron microscope proves that the spherical graphene is finally obtained, and the detection of Raman detection proves that the spherical grapheneI D /I G The value is 0.04 and its dimensions are 2 μm, with a spherical graphene wall thickness of 2 atomic layers.
(2) Uniformly mixing 1 part by weight of spherical graphene, 0.02 part by weight of polyimide with the molecular weight of 1000, 4 parts by weight of feldspar nano powder, 1 part by weight of hyperbranched carbosilane with the molecular weight of 6800 and the branching degree of 1.2 and 0.01 part by weight of dicumyl peroxide to obtain the infrared coating.
(3) And (3) centrifugally spraying the infrared coating obtained in the step (2) on the surface of a film formed by spraying the graphene conductive coating, setting the centrifugal force to be 2000rcf, and simultaneously carrying out ultraviolet curing at the temperature of 60 ℃ for 6h.
(4) Then adopting a microwave heating and shaping process, namely controlling the temperature to be kept for 1h at 250 ℃ and at the temperature rising speed of 4 ℃/min; then heating to 500 ℃, wherein the heating speed is 3 ℃/min, and keeping the temperature for 1h; and then heating to 1300 ℃, wherein the heating speed is 53 ℃/min, and the temperature is controlled for 1min to obtain the infrared heating ceiling.
The structure of the infrared heating suspended ceiling prepared by the method is as follows: a film formed by spraying graphene conductive paint is used as a conductive layer, and a polysilicate layer is used as an insulating layer and a heat input layer of a bottom layer; the silicon carbide layer is used as an insulating layer and an infrared radiation layer of the middle layer and is a main radiation layer, the rough surface area and the high radiation rate (95%) are added, and the radiation heating efficiency is greatly improved; the polymer layer is used as an upper layer for linking silicon carbide and spherical graphene, and the thickness of the polymer layer is 1nm; spherical graphite alkene runs through three layer construction and as outer radiation layer, and three layer construction's thickness is 30% of spherical graphite alkene thickness, and spherical graphite alkene's specific surface area is huge, and the radiance reaches up to 98%, has greatly improved infrared radiation heating, and high specific surface area defect state graphite alkene has fabulous heat-conduction effect simultaneously, can form splendid thermal convection interface with external gas, the reinforcing heating.
The infrared heating ceiling is 50m away from the thermal imaging system 2 Taking the temperature of the heat preservation room of (1) as a reference temperature for heating detection, wherein the room temperature rises to 26 ℃ in about 10 minutes, and the temperature difference is 3 ℃; after the suspended ceiling without the infrared coating layer consumes the same powerThe room temperature is only 21 degrees, and the temperature difference is 7 degrees. Therefore, the infrared heating ceiling can widely supply heat uniformly with high quality in rooms and has the effect of energy conservation. Through the feedback of comfort research, the radiation wavelength of the suspended ceiling with the infrared coating layer is about 8-16 mu m, and the wavelength is easily absorbed by a human body, so that the comfort is enhanced. The suspended ceiling without the infrared coating layer has short radiation wavelength and high energy, and easily burns clothes and even skin, so that the body feeling is poor.
Example 2
The invention provides an infrared heating ceiling which is composed of a conductive layer and an infrared coating layer; the conducting layer is an artificial graphite film. The infrared coating layer is assembled on the surface of the conductive layer through the centrifugal spiral coating layer, and the infrared heating suspended ceiling is obtained through curing. The preparation method comprises the following steps:
(1) Carrying out spray treatment on a graphene oxide solution with the concentration of 1mg/mL at 180 ℃, reducing the graphene oxide solution for 2h at 100 ℃ through HI, and reducing the graphene oxide solution for 2h at 1800 ℃ to prepare the spherical graphene.
SEM detection proves that spherical high-fold graphene is finally obtained, and Raman detection proves that I of the spherical graphene D /I G The value is 0.04 and its dimensions are 5 μm, the spherical graphene wall thickness is 3 atomic layers.
(2) Uniformly mixing 1 part by weight of spherical graphene, 0.07 part by weight of asphalt with the molecular weight of 7000, 2 parts by weight of mica nano powder, 2 parts by weight of hyperbranched carbosilane with the molecular weight of 5000 and the branching degree of 1.7 and 0.2 part by weight of peroxybenzoic acid to obtain the infrared coating.
(3) And (3) centrifugally spraying the mixed coating obtained in the step (2) on an artificial graphite film, setting the centrifugal force to be 7000rcf, and simultaneously carrying out ultraviolet curing at the temperature of 120 ℃ for 3h.
(4) And then adopting a high-temperature heating and shaping process: at the temperature of 0 ℃, the heating rate is 4 ℃/min, and the temperature is controlled to be kept for 2h; then heating to 500 ℃, wherein the heating speed is 3 ℃/min, and keeping the temperature for 2h; and then heating to 1300 ℃, wherein the heating speed is 55 ℃/min, and controlling the temperature for 5min to obtain the infrared heating ceiling.
The infrared suspended ceiling takes an artificial graphite film as a conducting layer, a polyaluminium silicate layer as a bottom interface fusion layer, a silicon carbide layer as a middle layer and an infrared radiation layer, a graphitizable high molecular layer as an upper layer and a rivet fixing layer, and spherical graphene penetrates through a three-layer structure and serves as an infrared radiation layer and a convection layer. The total thickness of a three-layer structure consisting of the bottom layer, the middle layer and the upper layer is 27% of the size of the spherical graphene; the thickness of the upper layer was 7nm.
The infrared heating ceiling is 50m away from the thermal imaging system 2 The temperature of the heat preservation room is 10 ℃ as a reference temperature for heating detection, the temperature of the room rises to 28 ℃ in about 10 minutes, and the temperature difference is 4 ℃; and after the suspended ceiling without the infrared coating layer consumes the same power, the room temperature of the suspended ceiling is only 22 degrees, and the temperature difference is 8 degrees. Therefore, the infrared heating ceiling can widely supply heat uniformly with high quality in rooms and has the effect of energy conservation. Through the feedback of comfort research, the radiation wavelength of the suspended ceiling with the infrared coating layer is about 8-16 mu m, and the wavelength is easily absorbed by a human body, so that the comfort is enhanced. The suspended ceiling without the infrared coating layer has short radiation wavelength and high energy, and easily burns clothes and even skin, so that the body feeling is poor.
Example 3
The invention provides an infrared heating ceiling which is composed of a conducting layer and an infrared coating layer; the conducting layer is a carbon tube film. The infrared coating layer is assembled on the surface of the conductive layer through a centrifugal spin coating layer, and the infrared heating ceiling is obtained through curing. The preparation method comprises the following steps:
(1) Carrying out spray treatment on graphene oxide with the concentration of 0.1mg/mL at 220 ℃, and carrying out HI reduction for 4h at 90 ℃ and reduction for 0.1h at 2000 ℃ to prepare the spherical graphene.
SEM detection proves that multi-fold spherical graphene is finally obtained, and Raman detection proves that I of the spherical graphene D /I G The value is 0.01 and its scale is 6 μm, with a spherical graphene wall thickness of 3 atomic layers.
(2) Uniformly mixing 1 part by weight of spherical graphene, 0.04 part by weight of polyacrylonitrile with the molecular weight of 8000, 3 parts by weight of kaolin nano powder, 1.5 parts by weight of hyperbranched carbosilane with the molecular weight of 4000 and the branching degree of 1.6 and 0.1 part by weight of 2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexane to obtain the infrared coating.
(3) And (3) centrifugally spraying the infrared coating obtained in the step (2), setting the centrifugal force to be 4000rcf, and simultaneously carrying out ultraviolet curing at the temperature of 120 ℃ for 2h.
(4) And then adopting a high-temperature heating and shaping process: at 250 ℃, the temperature rise speed is 2 ℃/min, and the heat preservation is controlled for 1h; then heating to 500 ℃, wherein the heating speed is 4.5 ℃/min, and keeping the temperature for 2h; and then heating to 1300 ℃, wherein the heating speed is 60 ℃/min, and the temperature is controlled for 2min, so that the infrared heating ceiling is obtained.
The infrared heating suspended ceiling takes the carbon tube film as a conducting layer, takes the polyaluminium silicate layer as a bottom interface fusion layer, takes the silicon carbide layer as a middle layer and an infrared radiation layer, takes the graphitizable high molecular layer as an upper layer and a rivet fixing layer, and takes the spherical graphene as an infrared radiation and convection layer after penetrating through the three-layer structure. The total thickness of a three-layer structure consisting of the bottom layer, the middle layer and the upper layer is 25% of the size of the spherical graphene; the thickness of the upper layer was 4nm.
The infrared heating ceiling is 50m away from the thermal imaging system 2 The temperature of the heat preservation room is 10 ℃ as a reference temperature for heating detection, the temperature of the room rises to 26 ℃ in about 10 minutes, and the temperature difference is 4 ℃; and after the suspended ceiling without the infrared coating layer consumes the same power, the room temperature is only 20 degrees, and the temperature difference is 8 degrees. Therefore, the infrared heating ceiling can widely supply heat uniformly with high quality in rooms, and has an energy-saving effect. Through the feedback of comfort research, the radiation wavelength of the suspended ceiling with the infrared coating layer is about 8-16 mu m, and the wavelength is easily absorbed by a human body, so that the comfort is enhanced. The suspended ceiling without the infrared coating layer has short radiation wavelength and high energy, and easily burns clothes and even skin, so that the body feeling is poor.
Example 4
The invention provides an infrared heating ceiling which is composed of a conducting layer and an infrared coating layer; the conducting layer is graphene fiber. The infrared coating layer is assembled on the surface of the conductive layer through a centrifugal spin coating layer, and the infrared heating ceiling is obtained through curing. The preparation method comprises the following steps:
(1) Carrying out spray treatment on graphene oxide with the concentration of 0.4mg/mL at 300 ℃, reducing for 5h at 90 ℃ through HI, and reducing for 4h at 1800 ℃ to prepare the spherical graphene.
SEM detection proves that multi-fold spherical graphene is finally obtained, and Raman detection proves that I of the spherical graphene D /I G The value is 0.02 and its dimensions are 3 μm, with a spherical graphene wall thickness of 2 atomic layers.
(2) Uniformly mixing 1 part by weight of spherical graphene, 0.07 part by weight of polyacrylonitrile with the molecular weight of 5000, 2 parts by weight of garnet nano powder, 2 parts by weight of hyperbranched carbosilane with the molecular weight of 6000 and the branching degree of 1.3 and 0.016 part by weight of methyl ethyl ketone peroxide to obtain the infrared coating.
(3) And (3) centrifugally spraying the infrared coating obtained in the step (2), setting the centrifugal force to be 6000rcf, and simultaneously carrying out ultraviolet curing at the temperature of 80 ℃ for 4h.
(4) And then adopting a high-temperature heating and shaping process: at 250 ℃, the temperature rise speed is 4 ℃/min, and the heat preservation is controlled for 1h; then heating to 500 ℃, wherein the heating speed is 3 ℃/min, and keeping the temperature for 1h; and then heating to 1300 ℃, wherein the heating speed is 55 ℃/min, and the temperature is controlled for 5min to obtain the infrared heating ceiling.
The infrared heating suspended ceiling takes graphene fiber as a conducting layer, takes a polyaluminium silicate layer as a bottom interface fusion layer, takes a silicon carbide layer as an intermediate layer and an infrared radiation layer, takes a graphitizable high molecular layer as an upper layer and a rivet fixing layer, and takes spherical graphene as an infrared radiation and convection layer after penetrating through a three-layer structure. The total thickness of a three-layer structure consisting of the bottom layer, the middle layer and the upper layer is 33% of the size of the spherical graphene; the thickness of the upper layer was 9nm.
The infrared heating ceiling is 50m away from the thermal imaging system 2 The temperature of the heat preservation room is 10 ℃ as a reference temperature for heating detection, the temperature of the room rises to 27 ℃ in about 10 minutes, and the temperature difference is 2.8 ℃; after the suspended ceiling without the infrared coating layer consumes the same powerThe room temperature is only 21.8 degrees, and the temperature difference is 7.2 degrees. Therefore, the infrared heating ceiling can widely supply heat uniformly with high quality in rooms, and has an energy-saving effect. Through the feedback of comfort research, the radiation wavelength of the suspended ceiling with the infrared coating layer is about 8-16 microns, and the wavelength is easily absorbed by a human body, so that the comfort is enhanced. The suspended ceiling without the infrared coating layer has short radiation wavelength and high energy, and easily burns clothes and even skin, so that the body feeling is poor.
Claims (8)
1. An infrared heating ceiling is characterized by comprising a conductive layer and an infrared coating layer; the conductive layer is a carbon-based conductive material and comprises a thin film formed by spraying graphene conductive paint, an artificial graphite film, a carbon tube film, carbon fibers and graphene fibers; the infrared coating layer is assembled on the surface of the conductive layer through the centrifugal spiral coating layer and is cured to obtain the infrared heating suspended ceiling; the infrared coating layer takes a polysilicate layer as a bottom insulating layer, a silicon carbide layer as a middle layer and an insulating layer, a graphitizable polymer layer as an upper layer and a rivet fixing layer, and spherical graphene penetrates through the three-layer structure; the size of the spherical graphene is 2-8 mu m, and the total thickness of a three-layer structure consisting of a bottom layer, a middle layer and an upper layer is not more than 1/3 of the size of the spherical graphene; the thickness of the upper layer is less than 10nm; the graphitizable polymer layer is composed of graphitizable polymers selected from polyimide, asphalt and polyacrylonitrile with the molecular weight of 1000-8000.
2. The infrared heating suspended ceiling of claim 1, wherein the polysilicate layer is a layer of feldspar, mica, kaolin, zeolite, or garnet.
3. The infrared heated suspended ceiling of claim 1, wherein the silicon carbide layer is comprised of hyperbranched carbosilanes having a molecular weight of less than 7000 and a degree of branching of 1.2 to 1.7.
4. The infrared heating ceiling as claimed in claim 1, wherein the preparation method of the infrared heating ceiling comprises the following steps: uniformly mixing 1 part by weight of spherical graphene, 0.02-0.07 part by weight of graphitizable high-molecular oligomer, 2-4 parts by weight of polyaluminosilicate, 1-2 parts by weight of hyperbranched carbosilane and 0.01-0.2 part by weight of peroxide cross-linking agent, centrifugally spraying on the surface of a conductive layer, and after ultraviolet curing, heating and shaping to obtain the infrared heating suspended ceiling; the temperature of the ultraviolet curing is 60-120 ℃, and the time is 1-6h.
5. The infrared heated drop ceiling of claim 4, wherein the peroxide crosslinking agent comprises dicumyl peroxide, methyl ethyl ketone peroxide, benzoic acid peroxide, 2, 5-dimethyl-2, 5 bis (t-butylperoxy) hexane.
6. The infrared heating suspended ceiling of claim 4, wherein the spherical graphene is formed by spraying a graphene oxide solution with a concentration of 0.1mg/mL-1mg/mL, and is obtained by chemical reduction and heat treatment at 1600-2000 ℃ for 0.1-4 hours; i of the spherical graphene D /I G The value is not higher than 0.05 and the wall thickness is less than 4 atomic layers.
7. An infrared heated suspended ceiling as claimed in claim 4 wherein the centrifugal force of the centrifuge is in the range of 2000-7000rcf.
8. The infrared heating suspended ceiling of claim 4, wherein the specific method for heating and shaping is as follows: at the temperature of 0-250 ℃, the heating speed is less than 5 ℃/min, and the heat preservation is controlled for 1-2h; then heating to 500 ℃, wherein the heating speed is less than 5 ℃/min, and controlling the temperature for 1-2h; then quickly heating to 1300 ℃, wherein the heating speed is more than 50 ℃/min, and keeping the temperature for 1-5min.
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