CN102604468B - SiO2 aerogel thermal insulation latex paint and preparation method thereof - Google Patents
SiO2 aerogel thermal insulation latex paint and preparation method thereof Download PDFInfo
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- CN102604468B CN102604468B CN201210023962.XA CN201210023962A CN102604468B CN 102604468 B CN102604468 B CN 102604468B CN 201210023962 A CN201210023962 A CN 201210023962A CN 102604468 B CN102604468 B CN 102604468B
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- 239000004964 aerogel Substances 0.000 title claims abstract description 72
- 239000004816 latex Substances 0.000 title claims abstract description 60
- 229920000126 latex Polymers 0.000 title claims abstract description 60
- 239000003973 paint Substances 0.000 title claims abstract description 54
- 238000009413 insulation Methods 0.000 title claims abstract description 50
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title abstract description 13
- 229910052681 coesite Inorganic materials 0.000 title abstract description 6
- 229910052906 cristobalite Inorganic materials 0.000 title abstract description 6
- 239000000377 silicon dioxide Substances 0.000 title abstract description 6
- 235000012239 silicon dioxide Nutrition 0.000 title abstract description 6
- 229910052682 stishovite Inorganic materials 0.000 title abstract description 6
- 229910052905 tridymite Inorganic materials 0.000 title abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000002245 particle Substances 0.000 claims abstract description 27
- 239000000839 emulsion Substances 0.000 claims abstract description 26
- 238000003756 stirring Methods 0.000 claims abstract description 11
- 238000000576 coating method Methods 0.000 claims description 63
- 239000011248 coating agent Substances 0.000 claims description 52
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 39
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 19
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 18
- 230000032683 aging Effects 0.000 claims description 18
- 239000008367 deionised water Substances 0.000 claims description 18
- 229910021641 deionized water Inorganic materials 0.000 claims description 18
- 229910052710 silicon Inorganic materials 0.000 claims description 18
- 239000010703 silicon Substances 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 16
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 claims description 15
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- 239000000243 solution Substances 0.000 claims description 12
- IJOOHPMOJXWVHK-UHFFFAOYSA-N chlorotrimethylsilane Chemical compound C[Si](C)(C)Cl IJOOHPMOJXWVHK-UHFFFAOYSA-N 0.000 claims description 10
- 238000004140 cleaning Methods 0.000 claims description 10
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 8
- 239000011259 mixed solution Substances 0.000 claims description 8
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 6
- 229960000935 dehydrated alcohol Drugs 0.000 claims description 6
- 229960004756 ethanol Drugs 0.000 claims description 6
- 239000002904 solvent Substances 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 5
- 239000005051 trimethylchlorosilane Substances 0.000 claims description 5
- BVMXDJZSNHRUES-UHFFFAOYSA-N CCO[SiH2]OCC.CN(C)C Chemical compound CCO[SiH2]OCC.CN(C)C BVMXDJZSNHRUES-UHFFFAOYSA-N 0.000 claims description 4
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- RSVCGWGXDUXRJI-UHFFFAOYSA-N dibutyl(ethyl)silicon Chemical compound CCCC[Si](CC)CCCC RSVCGWGXDUXRJI-UHFFFAOYSA-N 0.000 claims description 4
- 238000010790 dilution Methods 0.000 claims description 4
- 239000012895 dilution Substances 0.000 claims description 4
- 230000002209 hydrophobic effect Effects 0.000 claims description 4
- 229920000297 Rayon Polymers 0.000 claims description 3
- 239000003085 diluting agent Substances 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000012452 mother liquor Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 2
- 239000012153 distilled water Substances 0.000 claims description 2
- 229920002689 polyvinyl acetate Polymers 0.000 claims description 2
- 239000011118 polyvinyl acetate Substances 0.000 claims description 2
- 229920001909 styrene-acrylic polymer Polymers 0.000 claims description 2
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 2
- 229920002554 vinyl polymer Polymers 0.000 claims description 2
- 238000010276 construction Methods 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 4
- 238000004321 preservation Methods 0.000 description 4
- 239000011521 glass Substances 0.000 description 3
- 230000001052 transient effect Effects 0.000 description 3
- 208000003556 Dry Eye Syndromes Diseases 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000029087 digestion Effects 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000003760 magnetic stirring Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 230000003245 working effect Effects 0.000 description 2
- 241000227425 Pieris rapae crucivora Species 0.000 description 1
- 239000004113 Sepiolite Substances 0.000 description 1
- 239000004965 Silica aerogel Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- XZWYZXLIPXDOLR-UHFFFAOYSA-N metformin Chemical compound CN(C)C(=N)NC(N)=N XZWYZXLIPXDOLR-UHFFFAOYSA-N 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 235000019355 sepiolite Nutrition 0.000 description 1
- 229910052624 sepiolite Inorganic materials 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 239000010455 vermiculite Substances 0.000 description 1
- 235000019354 vermiculite Nutrition 0.000 description 1
- 229910052902 vermiculite Inorganic materials 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Abstract
The invention discloses a SiO2 aerogel thermal insulation latex paint and a preparation method of the SiO2 aerogel thermal insulation latex paint. The paint is formed by proportionally stirring SiO2 aerogel particles, emulsion paint and water. The SiO2 aerogel thermal insulation latex paint has the characteristics of good thermal insulation, flame resistance, high temperature resistance, incombustibility, high safety, high toughness, high compactness and the like, and is good thermal insulation paint.
Description
Technical field
The present invention relates to a kind of heat insulating coatings, relate in particular to a kind of high-performance SiO
2aerogel heat-proof insulation latex coating and preparation method thereof.
Background technology
The consumption of building energy consumption accounts for 30～40% of mankind's energy consumption, and the energy consuming in flourishing city summer, winter heating and heat supply has accounted for 40%～50% of buildings total energy consumption, the thermal and insulating performance that improves architectural exterior-protecting construction is to lower building energy consumption and improve buildings the important channel that uses function.In recent years, building wall employing has the thermal insulation mortar of energy-efficient performance, the method for thermal insulation coatings has caused concern more and more widely.But, at present conventional heat insulating coatings adopts conventional thermal insulation coatings to be prepared as insulation additive as sepiolite, pearlstone, expanded vermiculite etc., the thermal insulation coatings making is often because of its thick coating, the shortcomings such as easy to crack, easy contamination, are not suitable for wall outside the building and use and easily affect work-ing life of building heat preserving system.
Aerogel is as the good novel light super insulating material of a kind of heat preservation and insulation, there is the controlled nano-porous structure of structure, because making it, its unique nanostructure there is unique performance such as low thermal conductivity, low density and high-specific surface area, wherein thermal conductivity is about 0.013W/mK, and density is 0.11～0.15g/cm
3, high-specific surface area is about 500～1200m
2/ g, and aerogel has the super-hydrophobicity that contact angle can reach 160 ° after processing by special process, also there is the characteristics such as corrosion-resistant, high temperature resistant simultaneously, it is a kind of heat-insulating heat-preserving material of excellence, but because aerogel intensity is lower, wear resistance is poor, therefore the compound aerogel composites of making such as conventional aerogel particle and resin, fiber are to realize engineering application.Chinese patent CN1546312A discloses a kind of aerogel composite and flexible heat insulating film and preparation method thereof, this patent is to manufacture heat insulating coat by the method for silicone resin and the coating of aerogel Combined Mining, but because liquid resin is very easily immersed in the nano-void of aerogel, the heat-proof quality of coating entirety is reduced, therefore, be necessary that prior art aerogel is prepared to thermal insulating coating as raw material does further improvement.
Summary of the invention
Object of the present invention is exactly for overcoming the above problems, provide that a kind of thermal insulation is good, fireproof high-temperature resistant, do not fire, safe and obdurability and the high SiO of degree of compactness
2aerogel heat-proof thermal insulation coatings.
A further object of the present invention is to provide a kind of above-mentioned SiO
2the preparation method of aerogel heat-proof thermal insulation coatings.
For realizing above object, the present invention has taked following technical scheme:
A kind of SiO
2aerogel heat-proof insulation latex coating, comprises SiO
2aerogel particle, emulsion paint, water.
Further, described SiO
2aerogel particle diameter is 100nm～100 μ m(100nm～100000nm).
Further, described emulsion paint is one or more in silicon the third exterior wall latex paint, polyvinyl acetate paint, vinyl acetate-acrylic latex paint, pure acrylic acid emulsion paint, styrene-acrylic latex coating.
Further, described water is one or more in distilled water, deionized water or pure water.
Further, SiO as above
2aerogel heat-proof insulation latex coating, its SiO
2the mass percent of aerogel particle, emulsion paint, water is (1%-10%): (89%-70%): (10%-20%).
A kind of SiO that makes
2the method of aerogel heat-proof insulation latex coating, comprises the following steps:
A) SiO
2the preparation of aerogel particle;
1) SiO
2the configuration of colloidal sol: be tetraethoxy in mass ratio: dehydrated alcohol: deionized water: hydrochloric acid: dimethyl formamide: ammoniacal liquor=1:(1～3): (0.1～0.5): (0.01～0.02): (0.05～0.1): (0.01～0.05) mixes various liquid; In mixing process, first tetraethoxy and dehydrated alcohol mixed solution are stirred, in the process stirring, slowly drip successively deionized water and hydrochloric acid, continue to stir, then add dimethyl formamide, deionized water and ammoniacal liquor and stir, leave standstill and obtain SiO
2colloidal sol;
2) ageing and aging: the SiO2 colloidal sol sealing that step 1 is made, after leaving standstill under room temperature, form gel, by the ageing of gel room temperature, it is elementary aging by volume ratio to be that the mixed solution of deionized water: ethanol=1:3～1:10 carries out gel, then it is aging by volume ratio to be that the mother liquor of tetraethoxy: ethanol=1:3～1:10 carries out secondary to gel;
3) solvent exchange: the solution little by surface tension carries out solvent exchange to aging complete gel;
4) finishing: adopt the hydrophobic agents solution little with surface tension by volume 1:100～3:10 mix, gel is soaked;
5) surface cleaning: adopt the little solution effects on surface of surface tension to modify complete gel and carry out surface cleaning, remove the residual modified outcome of gel surface;
6) drying treatment: dry by being placed under loft drier normal pressure through the gel cleaning, drying temperature is 50～70 DEG C, and the time is 12～24 hours, obtains block SiO
2aerogel;
7) grind: by SiO
2airsetting blob of viscose grinds to form particulate state, and adopts filtering net that macrobead aerogel is filtered out, and obtains the particle that particle diameter is 100nm～100 μ m;
B) emulsion paint dilution: carry out mix and blend for emulsion paint: water=5:1～10:1 by mass percentage, churning time is 20-30 minute;
C) SiO
2aerogel heat-proof insulation latex coating preparation: take the SiO that mass percent is 1%-10%
2aerogel particle adds to and in the emulsion paint diluent described in step B, mixes to aerogel particle and mix completely with emulsion paint.
SiO as mentioned above
2aerogel heat-proof insulation latex coating making method, the solution that wherein said surface tension is little is one or more in normal hexane, normal heptane, acetone.
SiO as mentioned above
2aerogel heat-proof insulation latex coating making method, wherein said hydrophobic agents is one or more in trimethylchlorosilane, dimethyldimethoxysil,ne, ethyl dibutyl silane, trimethylammonium diethoxy silane.
Compared with prior art, tool has the following advantages in the present invention:
1) the present invention adopts the SiO that thermal insulation is good
2aerogel particle adds high-strong toughness to, brushes easily in emulsion paint and make the SiO obtaining as heat preserving and insulating material
2heat-insulation and heat-preservation emulsion paint coating is compared pure emulsion paint coating thermal conductivity and has been reduced more than 50%, makes the latex coating that construction wall is conventional become effective heat-insulating heat-preserving material, has improved the performance of latex coating, does not but affect the functions such as its original high-strong toughness.
2) effect of heat insulation of the heat insulating coatings that prepared by the present invention is good, only needs to apply the coating of 0.1～2mm, can obtain good heat insulation and preservation effect, has reduced construction cost, has guaranteed again the stability of coating.
3) heat insulating coatings that the present invention makes is aqueous mixture, easy to use, and while use on construction wall, operation is identical with the using method of conventional emulsion paint, and construction is simple, successful.
4) the heat insulating coatings fireproof high-temperature resistant that prepared by the present invention, does not fire, safe.
5) heat insulating coatings that prepared by the present invention has good obdurability and degree of compactness; the situation such as can effectively prevent from chapping, come off; and can effectively prevent the destruction of body of wall being caused because of the climatic factor such as rainwater, weathering, thus body of wall is played a protective role, extend the work-ing life of body of wall.
Brief description of the drawings
Fig. 1 is SiO of the present invention
2aerogel heat-proof insulation latex coating is made schema.
Embodiment
Below in conjunction with the drawings and specific embodiments, content of the present invention is described in further details.
Consult accompanying drawing 1 and make SiO for the present invention
2the schema of aerogel heat-proof insulation latex coating;
Step 1: SiO
2the configuration of colloidal sol: first tetraethoxy and dehydrated alcohol mixed solution are stirred in magnetic stirring apparatus, in the process stirring, slowly drip successively deionized water and hydrochloric acid, continue to stir 30 minutes, then add dimethyl formamide, deionized water and ammoniacal liquor and stir 15-20 minute, leave standstill and obtain SiO
2colloidal sol.Wherein, tetraethoxy: dehydrated alcohol: deionized water: hydrochloric acid: dimethyl formamide: the mass ratio (volume ratio/mol ratio of ammoniacal liquor?) be 1:(1～3): (0.1～0.5): (0.01～0.02): (0.05～0.1): (0.01～0.05);
Step 2: ageing and aging: the SiO that step 1 is made
2colloidal sol sealing, under room temperature, leave standstill after 0.1-5 hour, form gel, by gel room temperature ageing 1-2 days, the mixed solution that by volume ratio is deionized water: ethanol=1:3～1:10 carries out elementary aging to gel, digestion time is 1～72 hour, then it is aging by volume ratio to be that the mother liquor of tetraethoxy: ethanol=1:3～1:10 carries out secondary to gel, and digestion time is 1-72 hour;
Step 3: solvent exchange: aging complete gel is carried out to solvent exchange with hexane solution, time swap is 5-48 hour.
Step 4: finishing: adopt trimethylchlorosilane and hexane solution by volume 1:100～3:10 mix, gel is soaked to wherein 1-72 hour.
Step 5: surface cleaning: adopt hexane solution effects on surface to modify complete gel and carry out surface cleaning, remove the residual modified outcome of gel surface, surface cleaning number of times 2-4 time.
Step 6: drying treatment: dry by being placed under loft drier normal pressure through the gel cleaning, drying temperature is 50～70 DEG C, and the time is 12～24 hours, obtains block SiO
2aerogel.
Step 7: grind: by the SiO obtaining in above-mentioned steps 6
2airsetting blob of viscose grinds to form particulate state with shredder, and adopts filtering net that macrobead aerogel is filtered out, and obtains the particle that particle diameter is 100nm～100 μ m.
Step 8: emulsion paint dilution: carry out mix and blend for emulsion paint: water=5:1～10:1 by mass percentage, churning time is 20-30 minute;
Step 9: SiO
2aerogel heat-proof insulation latex coating preparation: take the SiO that mass percent is 1%-10%
2aerogel particle adds in the emulsion paint diluent described in above-mentioned steps eight and carries out mix and blend, is stirred to aerogel particle and mixes completely with emulsion paint, and churning time is 20-60 minute, has stirred rear standing 5-10 minute, finally obtains high-performance SiO
2aerogel heat-proof insulation latex coating.
Wherein, the hexane solution in above-mentioned steps three, four, five also can replace or replace with several mixed solutions in normal hexane, normal heptane, acetone with normal heptane, acetone soln.Trimethylchlorosilane in step 4 can replace or with several replacement the in trimethylchlorosilane, dimethyldimethoxysil,ne, ethyl dibutyl silane, trimethylammonium diethoxy silane with dimethyldimethoxysil,ne, ethyl dibutyl silane, trimethylammonium diethoxy silane.SiO in the present invention
2aerogel particle can adopt any means to make.
Embodiment 1:
Present embodiment is SiO by mass percentage
2aerogel particle 1%, silicon the third exterior wall latex paint 89% and deionized water 10% carry out mixed configuration.
First with deionized water by silicon the third exterior wall latex paint dilution, and be placed on magnetic stirring apparatus and stir 20 minutes, two parts that the quality such as are then divided into are labeled as respectively A, B, by the sample in contrast of A wherein; Separately take mass percent and be 1% SiO
2the a emulsion paint mix and blend 20min diluting with B part of aerogel particle, the SiO that obtains mixing
2aerogel heat-proof insulation latex coating is also labeled as C, below to A part silicon the third exterior wall latex paint and C part SiO
2the performance of aerogel heat-proof insulation latex coating contrasts:
First, will be of a size of 25mm × 30mm, the common white glass sheet surface that thickness is 5mm is carried out clean, first washes away the various spots of glass surface with neutral detergent, then rinses well with clear water, uses afterwards alcohol immersion, in the most rearmounted loft drier, dries; Secondly, by A part silicon the third exterior wall latex paint coating and C part SiO
2aerogel heat-proof insulation latex coating is by volume 450mm respectively
3, 600mm
3, 900mm
3be added drop-wise to the clean glass sheet surface of oven dry to control the thickness of coating, then can correspondingly obtain thickness silicon the third exterior wall latex paint coating and the SiO that is respectively 0.6mm, 0.8mm, 1.2mm
2aerogel heat-proof insulation latex coating; Then both are at room temperature left standstill to 30min and be placed on 35 DEG C of loft drier dry 1～2 day, obtain silicon the third exterior wall latex paint dry-eye disease and SiO
2aerogel heat-proof insulation latex coating dry-eye disease; Finally, with the thermal conductivity of dull and stereotyped transient state thermal conductivity instrument measure sample, can correspondence obtain silicon the third exterior wall latex paint coating and SiO
2thermal conductivity 0.976W/mK, 0.887W/mK, 0.844W/mK and 0.774W/mK, 0.700W/mK, the 0.601W/mK respectively of aerogel heat-proof insulation latex coating.Visible, add 1%SiO
2the thermal conductivity that heat-insulation and heat-preservation latex coating after aerogel is compared silicon the third exterior wall latex paint has reduced more than 20%.
Embodiment 2:
Present embodiment by mass percentage content is SiO
2aerogel particle 5%, silicon the third exterior wall latex paint 80% and deionized water 15% carry out mixed configuration.Step, with embodiment 1, with the thermal conductivity of dull and stereotyped transient state thermal conductivity instrument measure sample, can correspondence obtain silicon the third exterior wall latex paint coating and SiO
2the thermal conductivity of aerogel heat-proof insulation latex coating is respectively 0.976,0.887,0.844W/mK and 0.611,0.520,0.397W/mK, visible, interpolation 5%SiO
2after aerogel, SiO
2the thermal conductivity that silica aerogel insulation latex coating is compared silicon the third exterior wall latex paint has reduced more than 40%.
Embodiment 3:
Present embodiment by mass percentage content is SiO
2aerogel particle 10%, silicon the third exterior wall latex paint 75% and deionized water 15% carry out mixed configuration.Step, with embodiment 1, is that selected silicon the third exterior wall latex paint coating and the volume that is incubated latex coating are respectively 100mm
3, 450mm
3, then can obtain thickness and be respectively silicon the third exterior wall latex paint coating and SiO of 0.1mm, 0.6mm
2aerogel heat-proof insulation latex coating.With the thermal conductivity of dull and stereotyped transient state thermal conductivity instrument measure sample, can correspondence obtain silicon the third exterior wall latex paint coating and SiO
2the thermal conductivity of aerogel heat-proof insulation latex coating is respectively 1.075,0.976W/mK and 0.214 and 0.187W/mK.Visible, add after 10% aerogel SiO
2the thermal conductivity that the thermal conductivity of aerogel insulation latex coating is compared silicon the third exterior wall latex paint has reduced more than 80%.
Above-listed detailed description is for the illustrating of possible embodiments of the present invention, and this embodiment is not in order to limit the scope of the claims of the present invention, and the equivalence that all the present invention of disengaging do is implemented or changed, and all should be contained in the scope of the claims of this case.
Claims (5)
1. a SiO
2aerogel heat-proof insulation latex coating, is characterized in that: comprise SiO
2aerogel particle, emulsion paint, water; Described SiO
2the mass percent of aerogel particle, emulsion paint, water is (1%-10%): (89%-70%): (10%-20%);
Described SiO
2the preparation method of aerogel heat-proof insulation latex coating comprises the following steps:
A) SiO
2the preparation of aerogel particle:
1) SiO
2the configuration of colloidal sol: be tetraethoxy in mass ratio: dehydrated alcohol: deionized water: hydrochloric acid: dimethyl formamide: ammoniacal liquor=1:(1～3): (0.1～0.5): (0.01～0.02): (0.05～0.1): (0.01～0.05) mixes various liquid; In mixing process, first tetraethoxy and dehydrated alcohol mixed solution are stirred, in the process stirring, slowly drip successively deionized water and hydrochloric acid, continue to stir, then add dimethyl formamide, deionized water and ammoniacal liquor and stir, leave standstill and obtain SiO
2colloidal sol;
2) ageing and aging: the SiO that step 1) is made
2colloidal sol sealing, under room temperature, leave standstill and form gel, by at room temperature ageing of gel, by volume ratio be that the mixed solution of deionized water: ethanol=1:3～1:10 carries out gel elementary aging, then it is aging by volume ratio to be that the mother liquor of tetraethoxy: ethanol=1:3～1:10 carries out secondary to gel;
3) solvent exchange: the solution little by surface tension carries out solvent exchange to aging complete gel;
4) finishing: adopt the hydrophobic agents solution little with surface tension by volume 1:100～3:10 mix, gel is soaked in this mixed solution;
5) surface cleaning: adopt the little solution effects on surface of surface tension to modify complete gel and carry out surface cleaning, remove the residual modified outcome of gel surface;
6) drying treatment: carry out constant pressure and dry and obtain block SiO being placed in loft drier through the gel cleaning
2aerogel;
7) grind: by SiO
2airsetting blob of viscose grinds to form particulate state, and adopts filtering net that macrobead aerogel is filtered out, and obtains the particle that particle diameter is 100nm～100 μ m;
B) emulsion paint dilution: carry out mix and blend for emulsion paint: water=5:1～10:1 in mass ratio;
C) SiO
2aerogel heat-proof insulation latex coating preparation: take the SiO that mass percent is 1%-10%
2aerogel particle adds to and in the emulsion paint diluent described in step B, mixes to aerogel particle and mix completely with emulsion paint.
2. SiO as claimed in claim 1
2aerogel heat-proof insulation latex coating, is characterized in that: described emulsion paint is one or more in silicon the third exterior wall latex paint, polyvinyl acetate paint, vinyl acetate-acrylic latex paint, pure acrylic acid emulsion paint, styrene-acrylic latex coating.
3. SiO as claimed in claim 1
2aerogel heat-proof insulation latex coating, is characterized in that: described water is one or more in distilled water, deionized water or pure water.
4. SiO as claimed in claim 1
2aerogel heat-proof insulation latex coating, is characterized in that: the solution that described surface tension is little is one or more in normal hexane, normal heptane, acetone.
5. SiO as claimed in claim 1
2aerogel heat-proof insulation latex coating, is characterized in that: described hydrophobic agents is one or more in trimethylchlorosilane, dimethyldimethoxysil,ne, ethyl dibutyl silane, trimethylammonium diethoxy silane.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210023962.XA CN102604468B (en) | 2012-02-03 | 2012-02-03 | SiO2 aerogel thermal insulation latex paint and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210023962.XA CN102604468B (en) | 2012-02-03 | 2012-02-03 | SiO2 aerogel thermal insulation latex paint and preparation method thereof |
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|---|---|
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| CN102604468B true CN102604468B (en) | 2014-06-25 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101195725A (en) * | 2007-12-29 | 2008-06-11 | 株洲时代新材料科技股份有限公司 | Heat-insulating energy-saving paint for vehicle and method for producing the same |
| CN102079949A (en) * | 2010-12-22 | 2011-06-01 | 李志� | Preparation method of nanometer aerogel heat-insulation coating |
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