CN109456680A - A kind of solar vacuum-tube water heater heat absorption layer material - Google Patents
A kind of solar vacuum-tube water heater heat absorption layer material Download PDFInfo
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- CN109456680A CN109456680A CN201811144287.XA CN201811144287A CN109456680A CN 109456680 A CN109456680 A CN 109456680A CN 201811144287 A CN201811144287 A CN 201811144287A CN 109456680 A CN109456680 A CN 109456680A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
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- C09D163/10—Epoxy resins modified by unsaturated compounds
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- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
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Abstract
The present invention relates to thermal-arrest field of material technology, and in particular to a kind of solar vacuum-tube water heater heat absorption layer material.Heat absorption layer material is located at the outer wall of vacuum tube inner tube；The component of heat absorption layer material includes: acrylic modified epoxy resin, curing agent, nanometer carbon black, chromic nitrate, 2,4-DihydroxyBenzophenone, radiation accumulation of energy agent, organic solvent, Thermal conductive additives, levelling agent and coupling agent.Wherein, organic solvent be ethyl alcohol, ethyl acetate according to 7:2 quality than mixture mixture；Thermal conductive additives be Alpha-alumina and sodium nitrite etc. quality compare mixture；Vacuum tube outer wall of inner tube is coated with aluminum-nickel-chromium alloy layer, and heat absorbing coating is coated on aluminum-nickel-chromium alloy layer surface；The profile material can be improved the absorptive rate of radiation of vacuum tube collector, reduces reflectivity, and can play good heat-storage heat-preserving performance, reduces the thermal radiation loss of itself；Improve the solar energy utilization ratio of water heater.
Description
Technical field
The present invention relates to thermal-arrest field of material technology, and in particular to a kind of solar vacuum-tube water heater heat-sink shell material
Material.
Background technique
Solar water heater is the heating device for converting the luminous energy of the sun to thermal energy, by water from low-temperature heat to high temperature,
It is used with meeting hot water of the people in life, production.Solar water heater is divided into vacuum pipe solar by structure type
Hydrophone and flat solar water heater.Electron tubes type domestic solar water heater is by phases such as thermal-collecting tube, water tank and brackets
Spare and accessory parts composition is closed, solar energy is converted into thermal energy and relies primarily on evacuated collector tube, evacuated collector tube utilizes hot water floating cold water
The principle of sinking makes water generate microcirculation and obtain required hot water.Solar water heater currently on the market is with electron tubes type warm
Based on hydrophone, about 85% market share is occupied.
Full-glass solar energy collecting vacuum tube is most commonly that in Chinese market at present.Structure is divided into outer tube, inner tube, inside
Pipe outer wall is coated with coating for selective absorption.The absorption films such as black chromium are coated on the thermal-arrest panel of flat plate collector, metal tube is welded on
On collecting plate, flat plate collector is slightly higher compared with vacuum tube collector cost, and ascendant trend was presented in flat plate collector in recent years, especially exists
There is unique advantage in terms of the balcony type solar water heater of high residential building.Full-glass solar energy heat collecting vacuum pipe is generally high borosilicate
Ultrahard glass manufacture, selective heat-absorbing film use vacuum sputtering selective plating technique.
The performance of selective heat absorbing coating on vacuum pipe heat-collecting pipe has great influence to the heat absorption capacity of heat collector,
In use process, sunlight is radiated on thermal-collecting tube.The heat absorbing coating of interior pipe surface can absorb a large amount of radiation energy, and be converted into
The interior energy of itself, with the raising of energy in heat absorbing coating, also corresponding body increases the temperature of its own, and the heat of heat absorbing coating can lead to
The mode for crossing heat transfer carries out hull transmitting, and since the inner tube of vacuum tube contains vacuum layer outward, heat can not be passed
It leads, can only conduct into the water of inside to realize the heating to water body by inner pipe wall.Just because of the structure of vacuum tube,
So that the solar energy utilization ratio of the type heat collector obtains very big promotion.
But heat absorbing coating carries out except ability transmitting except through the mode of heat transfer, can also in a manner of heat radiation into
Row heat dissipation, since the intensity of heat radiation is not influenced by vacuum tube, a large amount of interior side that can pass through radiation in heat absorbing coating
Formula lost.And the caloradiance of heat-absorbing paint is related with the temperature of itself, if suction can be reduced by certain mode
The caloradiance of hot coating, then can reduce the energy loss of heat absorbing coating, and improve the solar energy utilization ratio of water heater.
Summary of the invention
Aiming at the problems existing in the prior art, the present invention provides a kind of solar vacuum-tube water heater heat-sink shell materials
Material, the profile material can be improved the absorptive rate of radiation of vacuum tube, reduce reflectivity, and can play good heat-storage heat-preserving
Can, reduce the thermal radiation loss of itself；Improve the solar energy utilization ratio of water heater.
In order to achieve the above object, the present invention is achieved through the following technical solutions:
A kind of solar vacuum-tube water heater heat absorption layer material, heat absorption layer material are located at the outer layer of vacuum tube inner tube；It presses
According to mass fraction, the component for the layer material that absorbs heat includes: 100-120 parts of acrylic modified epoxy resin, 90-100 parts of curing agent, is received
45-65 parts of carbon black of rice, 1.2-2.7 parts of 2,4-DihydroxyBenzophenone, radiates 15-25 parts of accumulation of energy agent, has by 60-80 parts of chromic nitrate
30-40 parts of solvent, 7-13 parts of Thermal conductive additives, 1-2 parts of levelling agent, 2.5-3 parts of coupling agent.
Preferably, according to mass fraction, the component for the layer material that absorbs heat includes: 105-115 parts of acrylic modified epoxy resin,
94-98 parts of curing agent, 52-57 parts of nanometer carbon black, 70-75 parts of chromic nitrate, 1.7-2.2 parts of 2,4-DihydroxyBenzophenone, radiation
19-23 parts of accumulation of energy agent, 34-38 parts of organic solvent, 9-12 parts of Thermal conductive additives, 1.3-1.7 parts of levelling agent, 2.7-2.9 parts of coupling agent.
It is further preferred that the component for the layer material that absorbs heat includes: acrylic modified epoxy resin 108 according to mass fraction
Part, 97 parts of curing agent, 54 parts of nanometer carbon black, 72 parts of chromic nitrate, 1.9 parts of 2,4-DihydroxyBenzophenone, 21 parts of accumulation of energy agent are radiated,
36 parts of organic solvent, 11 parts of Thermal conductive additives, 1.5 parts of levelling agent, 2.8 parts of coupling agent.
In the present invention, the preparation method of radiation accumulation of energy agent includes the following steps:
(1) according to mass fraction, 12.5 parts of dimethyl butyrate thioethers are added in 100 parts of n-hexanes, heating water bath to 45-
It 50 DEG C and sufficiently dissolves, obtains solution；According to the mass ratio of mass ratio 100:35:4 by mica powder, nanometer calcium silicates and nanometer two
Titanium oxide mixing, 60 parts of mixed powders are added in previous solu, are dispersed in Scattered Kettle with the revolving speed of 600-650r/min
2.4 parts of lauric acid polyoxyethylene esters and 5 parts of nano zine oxides, are then added in Scattered Kettle by processing, and ultrasonic disperse handles 15-
Then dispersion liquid is greater than 95 DEG C of temperature spray drying treatment, obtains required filler A by 20min；
(2) it is filled with nitrogen atmosphere into polymerization reaction kettle to be protected, and 300 parts of heptane solvents is added, then by 15 parts
Isoprene monomer is added in reaction kettle, and the methylpyrrole of the tetrahydrofuran and 0.1% that account for monomer mass 0.25% is added
Temperature in polymerization reaction kettle is increased to 70-73 DEG C after being uniformly dispersed by alkanone, is then added dropwise into reaction kettle and is accounted for monomer mass
0.5% n-BuLi initiated polymerization occurs, after reacting 15-18min, continuously add 60 parts of 1,3- hexadiene monomers and
The tertiary fourth for accounting for quality of material 0.1% is added into reaction kettle after reaction by 2.5 parts of tetrahydrofurans, adiabatic reaction 30-40min
Base trichlorosilane coupling agent, the reaction was continued 25-30min obtain first polymer B；
(3) temperature of charge in polymerization reaction kettle is increased to 80-82 DEG C, the 2- chloromethane for accounting for quality of material 0.15% is added
Base furans and 0.1% n-BuLi, 1.5-2h is reacted with the pressure heat-insulation pressure keeping of 1.0MPa, then extracts product out, is added
To etc. quality deionized water in, after being cooled to room temperature, then distilled with 105-110 DEG C of temperature, remove solvent, it is embedding needed for obtaining
Section polymer C；
(4) by 35 parts of fillers, 50 parts of block polymer C, 300 parts of n-octadecanes, 5.8 parts of polyvinyl alcohol, 3.2 parts of 2- hydroxyls
Base -4- methoxy benzophenone and 1.5 parts of antioxidant 1076 mixing, are added in reaction kettle, under vacuum conditions, are heated to
110-125 DEG C, with the revolving speed of 800-900r/min, heat preservation dispersion reaction 10-15min after reaction product is cooled to room temperature, is obtained
Required radiation accumulation of energy agent.
Wherein, the nonionic surfactant in step (1) is lauric acid polyoxyethylene ester.
The viscosity for radiating accumulation of energy agent is 820-850cp.
Preferably, curing agent selects Amino End Group dimethyl silicone polymer.
Preferably, organic solvent be ethyl alcohol, ethyl acetate according to 7:2 quality than mixture mixture；Thermal conductive additives
For Alpha-alumina and sodium nitrite etc. quality compare mixture.
Preferably, levelling agent selects liquid levelling agent SC-333 or solid levelling agent RB503；Coupling agent selection KH-792,
One of SCA-602, KH-560.
Wherein, vacuum tube outer wall of inner tube is coated with aluminum-nickel-chromium alloy layer, and heat absorbing coating is coated on aluminum-nickel-chromium alloy layer table
Face, aluminum-nickel-chromium alloy layer with a thickness of 70-90nm.
On the one hand the effect of aluminum-nickel-chromium alloy layer is adhesive force intensity of the raising heat absorption layer material in interior pipe surface, another
Aspect is in order to promote the heat conduction efficiency between heat absorption layer material and glass inner tube, to improve the utilization rate of solar energy.
The present invention have it is following the utility model has the advantages that
It uses acrylic modified epoxy resin as the matrix of heat absorbing coating in the present invention, and utilizes Amino End Group poly dimethyl
Siloxanes is as curing agent, and the transmitance to light of this matrix is high, and anti-minus effect is preferable, and the intensity of coating is high, resistance to
Mill property is good, and anti-aging property is prominent, stronger for the adhesive force effect of substrate, it is not easy to fall off.
Use chromic nitrate and nanometer carbon black as main heat-absorbing material in heat absorbing coating, the absorptivity of both materials and
Photothermal conversion rate is higher, can convert the luminous energy of sunlight to the interior energy of itself.In order to solve heat-absorbing material because of temperature liter
Gao Hou, the thermal energy radiation of itself scatter and disappear higher problem, and the present invention has been especially added with a kind of special spoke in heat absorption layer material
Penetrate energy storage agent, the effect of this additive is that the thermal energy generated to heat-absorbing material absorbs, and reduce heat absorption layer material because
Temperature amplification after interior energy increase, to reduce the caloradiance of itself of material, and mainly passes through heat transfer for thermal energy
Mode is transferred in substrate and internal water, to reduce radiation energy loss；Improve the solar energy conversion ratio of vacuum tube collector.
It the use of 2,4-DihydroxyBenzophenone is a kind of ultraviolet absorbing agent in material, suction can be enhanced in the addition of the component
Absorption of the thermosphere for specific wavelength ultraviolet light, and play the role of to resinous substrates age inhibiting, improve the steady of heat absorbing coating
It is qualitative.Using Alpha-alumina and sodium nitrite as Thermal conductive additives in the present invention, the effect of Thermal conductive additives is to improve heat-absorbing material
Heating conduction between substrate, convenient for the thermal energy of heat-absorbing material to be rapidly transferred on substrate.
Specific embodiment
Below with reference to embodiment, further description of the specific embodiments of the present invention, and following embodiment is only used for more
Technical solution of the present invention is clearly demonstrated, and not intended to limit the protection scope of the present invention.
In following embodiment, the preparation method of radiation accumulation of energy agent includes the following steps:
(1) according to mass fraction, 12.5 parts of dimethyl butyrate thioethers are added in 100 parts of n-hexanes, heating water bath to 48
DEG C and sufficiently dissolve, obtain solution；According to the mass ratio of mass ratio 100:35:4 by mica powder, nanometer calcium silicates and nano-silica
Change titanium mixing, 60 parts of mixed powders is added in previous solu, with the revolving speed decentralized processing of 600r/min in Scattered Kettle, so
2.4 parts of lauric acid polyoxyethylene esters and 5 parts of nano zine oxides are added in Scattered Kettle afterwards, ultrasonic disperse handles 20min, then
Dispersion liquid is greater than to 95 DEG C of temperature spray drying treatment, obtains required filler A；
(2) it is filled with nitrogen atmosphere into polymerization reaction kettle to be protected, and 300 parts of heptane solvents is added, then by 15 parts
Isoprene monomer is added in reaction kettle, and the methylpyrrole of the tetrahydrofuran and 0.1% that account for monomer mass 0.25% is added
Temperature in polymerization reaction kettle is increased to 72 DEG C after being uniformly dispersed by alkanone, is then added dropwise into reaction kettle and is accounted for monomer mass
0.5% n-BuLi initiated polymerization occurs, and after reacting 16min, continuously adds 60 parts of 1,3- hexadiene monomers and 2.5 parts
The tert-butyl trichlorine silicon for accounting for quality of material 0.1% is added into reaction kettle after reaction by tetrahydrofuran, adiabatic reaction 35min
Alkane coupling agent, the reaction was continued 30min obtain first polymer B；
(3) temperature of charge in polymerization reaction kettle is increased to 80 DEG C, the 2- chloromethyl for accounting for quality of material 0.15% is added
Furans and 0.1% n-BuLi, 2h is reacted with the pressure heat-insulation pressure keeping of 1.0MPa, then extracts product out, the matter such as is added to
In the deionized water of amount, after being cooled to room temperature, then with 110 DEG C of temperature distillation, solvent is removed, required block polymer C is obtained；
(4) by 35 parts of fillers, 50 parts of block polymer C, 300 parts of n-octadecanes, 5.8 parts of polyvinyl alcohol, 3.2 parts of 2- hydroxyls
Base -4- methoxy benzophenone and 1.5 parts of antioxidant 1076 mixing, are added in reaction kettle, under vacuum conditions, are heated to
120 DEG C, with the revolving speed of 850r/min, heat preservation dispersion reaction 15min, after reaction product is cooled to room temperature, radiation needed for obtaining stores
It can agent.
Wherein, the nonionic surfactant in step (1) is lauric acid polyoxyethylene ester.
The viscosity for radiating accumulation of energy agent is 820-850cp.
Embodiment 1
A kind of solar vacuum-tube water heater heat absorption layer material, heat absorption layer material are located at the outer layer of vacuum tube inner tube；It presses
According to mass fraction, the component for the layer material that absorbs heat includes: 100 parts of acrylic modified epoxy resin, and 90 parts of curing agent, nanometer carbon black 45
Part, 60 parts of chromic nitrate, 1.2 parts of 2,4-DihydroxyBenzophenone, 15 parts of accumulation of energy agent of radiation, 30 parts of organic solvent, Thermal conductive additives 7
Part, 1 part of levelling agent, 2.5 parts of coupling agent.
Wherein, curing agent selects Amino End Group dimethyl silicone polymer.
Organic solvent be ethyl alcohol, ethyl acetate according to 7:2 quality than mixture mixture；Thermal conductive additives are alpha-oxidation
Aluminium and sodium nitrite etc. quality compare mixture.
Levelling agent selects liquid levelling agent SC-333；Coupling agent selects KH-792.
Vacuum tube outer wall of inner tube is coated with aluminum-nickel-chromium alloy layer, and heat absorbing coating is coated on aluminum-nickel-chromium alloy layer surface, aluminium
Nichrome coating with a thickness of 70-90nm.
Embodiment 2
A kind of solar vacuum-tube water heater heat absorption layer material, heat absorption layer material are located at the outer layer of vacuum tube inner tube；It presses
According to mass fraction, the component for the layer material that absorbs heat includes: 120 parts of acrylic modified epoxy resin, and 100 parts of curing agent, nanometer carbon black
65 parts, 80 parts of chromic nitrate, 2.7 parts of 2,4-DihydroxyBenzophenone, 25 parts of accumulation of energy agent of radiation, 40 parts of organic solvent, Thermal conductive additives
13 parts, 2 parts of levelling agent, 3 parts of coupling agent.
Wherein, curing agent selects Amino End Group dimethyl silicone polymer.
Organic solvent be ethyl alcohol, ethyl acetate according to 7:2 quality than mixture mixture；Thermal conductive additives are alpha-oxidation
Aluminium and sodium nitrite etc. quality compare mixture.
Levelling agent selects solid levelling agent RB503；Coupling agent selects SCA-602.
Vacuum tube outer wall of inner tube is coated with aluminum-nickel-chromium alloy layer, and heat absorbing coating is coated on aluminum-nickel-chromium alloy layer surface, aluminium
Nichrome coating with a thickness of 70-90nm.
Embodiment 3
A kind of solar vacuum-tube water heater heat absorption layer material, heat absorption layer material are located at the outer layer of vacuum tube inner tube；It presses
According to mass fraction, the component for the layer material that absorbs heat includes: 108 parts of acrylic modified epoxy resin, and 97 parts of curing agent, nanometer carbon black 54
Part, 72 parts of chromic nitrate, 1.9 parts of 2,4-DihydroxyBenzophenone, 21 parts of accumulation of energy agent of radiation, 36 parts of organic solvent, Thermal conductive additives 11
Part, 1.5 parts of levelling agent, 2.8 parts of coupling agent.
Wherein, curing agent selects Amino End Group dimethyl silicone polymer.
Organic solvent be ethyl alcohol, ethyl acetate according to 7:2 quality than mixture mixture；Thermal conductive additives are alpha-oxidation
Aluminium and sodium nitrite etc. quality compare mixture.
Levelling agent selects liquid levelling agent SC-333；Coupling agent selects KH-560.
Vacuum tube outer wall of inner tube is coated with aluminum-nickel-chromium alloy layer, and heat absorbing coating is coated on aluminum-nickel-chromium alloy layer surface, aluminium
Nichrome coating with a thickness of 70-90nm.
Performance test
1, the absorptive rate of radiation and emissivity of the layer material that absorbs heat are tested in the present embodiment using copper and aluminium as substrate respectively；
And test heat-sink shell heat ageing and corrosion-resistant equal weather resistances；Obtain following test result:
Table 1: the performance test results for the layer material that absorbs heat in the present embodiment
It analyzes the above experimental result and finds the thermal radiation absorption rate of heat absorption layer material of the invention and the heat-absorbing material of routine
It is closer to, but its radiant emissivity is very low, therefore can significantly reduce heat-absorbing material heat radiation dissipation, and the function material
Material also has good heat aging performance and corrosion resistance, and optical property of the material under 250 DEG C of conditions of high temperature is still stable,
Material after salt spray test, will not fall off, blister or problem of Cracking, and the weather resistance for the layer material that absorbs heat is very prominent
Out.
2, use black chromium plating as the vacuum tube collector for the layer material that absorbs heat as control group using conventional in the market, and make
With the vacuum tube collector of the heat absorption layer material in the present embodiment carry out energy conversion comparative test, respectively continuous three days when
The water temperature variation of interior test water tank, wherein water temperature when with morning 8 is initial water temperature, and the water temperature with 6 points at night is to terminate water
Temperature replaces the water in water tank after the test every time；Obtain following test data:
Table 2: the energy conversion test result of vacuum tube collector in the present embodiment and control group
The above experimental result discovery is analyzed, the solar energy conversion ratio of vacuum tube collector provided by the invention is higher than control
Group, wherein at the end of daylighting, water temperature Temperature Difference Ratio control group is higher by flat plate collector of the invention under identical initial temperature
17 DEG C or so, therefore, it can be seen that heat absorption layer material in the present invention mentions the solar energy conversion ratio of vacuum tube collector
Rise has positive effect really.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, although referring to aforementioned reality
Applying example, invention is explained in detail, for those skilled in the art, still can be to aforementioned each implementation
Technical solution documented by example is modified or equivalent replacement of some of the technical features.It is all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of solar vacuum-tube water heater heat absorption layer material, heat absorption layer material are located at the outer wall of vacuum tube inner tube；It is special
Sign is: according to mass fraction, the component of the heat absorption layer material includes: 100-120 parts of acrylic modified epoxy resin, solidification
90-100 parts of agent, 45-65 parts of nanometer carbon black, 60-80 parts of chromic nitrate, 1.2-2.7 parts of 2,4-DihydroxyBenzophenone, radiate accumulation of energy
15-25 parts of agent, 30-40 parts of organic solvent, 7-13 parts of Thermal conductive additives, 1-2 parts of levelling agent, 2.5-3 parts of coupling agent.
2. a kind of solar vacuum-tube water heater according to claim 1 heat absorption layer material, it is characterised in that: according to matter
Number is measured, the component of the heat absorption layer material includes: 105-115 parts of acrylic modified epoxy resin, 94-98 parts of curing agent, is received
52-57 parts of carbon black of rice, 1.7-2.2 parts of 2,4-DihydroxyBenzophenone, radiates 19-23 parts of accumulation of energy agent, has by 70-75 parts of chromic nitrate
34-38 parts of solvent, 9-12 parts of Thermal conductive additives, 1.3-1.7 parts of levelling agent, 2.7-2.9 parts of coupling agent.
3. a kind of solar vacuum-tube water heater according to claim 1 heat absorption layer material, it is characterised in that: according to matter
Number is measured, the component of the heat absorption layer material includes: 108 parts of acrylic modified epoxy resin, and 97 parts of curing agent, nanometer carbon black 54
Part, 72 parts of chromic nitrate, 1.9 parts of 2,4-DihydroxyBenzophenone, 21 parts of accumulation of energy agent of radiation, 36 parts of organic solvent, Thermal conductive additives 11
Part, 1.5 parts of levelling agent, 2.8 parts of coupling agent.
4. a kind of solar vacuum-tube water heater according to claim 1 heat absorption layer material, which is characterized in that the spoke
The preparation method for penetrating accumulation of energy agent includes the following steps:
(1) according to mass fraction, 12.5 parts of dimethyl butyrate thioethers are added in 100 parts of n-hexanes, heating water bath is to 45-50 DEG C
And sufficiently dissolve, obtain solution；According to the mass ratio of mass ratio 100:35:4 by mica powder, nanometer calcium silicates and nanometer titanium dioxide
Titanium mixing, 60 parts of mixed powders are added in previous solu, with the revolving speed decentralized processing of 600-650r/min in Scattered Kettle,
Then 2.4 parts of lauric acid polyoxyethylene esters and 5 parts of nano zine oxides are added in Scattered Kettle, ultrasonic disperse handles 15-
Then dispersion liquid is greater than 95 DEG C of temperature spray drying treatment, obtains required filler A by 20min；
(2) it is filled with nitrogen atmosphere into polymerization reaction kettle to be protected, and 300 parts of heptane solvents is added, then by 15 parts of isoamyls
Diene monomers are added in reaction kettle, and the methyl pyrrolidone of the tetrahydrofuran and 0.1% that account for monomer mass 0.25% is added, point
The temperature in polymerization reaction kettle is increased to 70-73 DEG C after dissipating uniformly, is then added dropwise into reaction kettle and accounts for monomer mass 0.5%
N-BuLi initiated polymerization occurs, and after reacting 15-18min, continuously adds 60 parts of 1,3- hexadiene monomers and 2.5 parts of tetrahydros
The tert-butyl trichlorosilane for accounting for quality of material 0.1% is added into reaction kettle after reaction by furans, adiabatic reaction 30-40min
Coupling agent, the reaction was continued 25-30min obtain first polymer B；
(3) temperature of charge in polymerization reaction kettle is increased to 80-82 DEG C, the 2- chloromethyl furan for accounting for quality of material 0.15% is added
The n-BuLi muttered with 0.1% reacts 1.5-2h with the pressure heat-insulation pressure keeping of 1.0MPa, then extracts product out, the matter such as is added to
In the deionized water of amount, after being cooled to room temperature, then with 105-110 DEG C of temperature distillation, solvent is removed, required block polymerization is obtained
Object C；
(4) by 35 parts of fillers, 50 parts of block polymer C, 300 parts of n-octadecanes, 5.8 parts of polyvinyl alcohol, 3.2 parts of 2- hydroxyls-
4- methoxy benzophenone and 1.5 parts of antioxidant 1076 mixing, are added in reaction kettle, under vacuum conditions, are heated to 110-
125 DEG C, with the revolving speed of 800-900r/min, heat preservation dispersion reaction 10-15min, after reaction product is cooled to room temperature, needed for obtaining
Radiate accumulation of energy agent.
5. a kind of solar vacuum-tube water heater according to claim 4 heat absorption layer material, which is characterized in that the step
Suddenly the nonionic surfactant in (1) is lauric acid polyoxyethylene ester.
6. a kind of solar vacuum-tube water heater according to claim 4 heat absorption layer material, it is characterised in that: the spoke
The viscosity for penetrating accumulation of energy agent is 820-850cp.
7. a kind of solar vacuum-tube water heater according to claim 1 heat absorption layer material, it is characterised in that: described solid
Agent selects Amino End Group dimethyl silicone polymer.
8. a kind of solar vacuum-tube water heater according to claim 1 heat absorption layer material, it is characterised in that: described to have
Solvent be ethyl alcohol, ethyl acetate according to 7:2 quality than mixture mixture；Thermal conductive additives are Alpha-alumina and nitrous acid
Sodium etc. quality compare mixture.
9. a kind of solar vacuum-tube water heater according to claim 1 heat absorption layer material, it is characterised in that: the stream
Liquid levelling agent SC-333 or solid levelling agent RB503 is selected in flat agent；Coupling agent is selected in KH-792, SCA-602, KH-560
It is a kind of.
10. a kind of solar vacuum-tube water heater according to claim 1 heat absorption layer material, it is characterised in that: described
Vacuum tube outer wall of inner tube is coated with aluminum-nickel-chromium alloy layer, and heat absorbing coating is coated on aluminum-nickel-chromium alloy layer surface, aluminum-nickel-chromium alloy
Coating with a thickness of 70-90nm.
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Application publication date: 20190312 |