CN107265963A - A kind of superthermal insulation aerogel foam concrete and preparation method thereof - Google Patents
A kind of superthermal insulation aerogel foam concrete and preparation method thereof Download PDFInfo
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- CN107265963A CN107265963A CN201610214828.6A CN201610214828A CN107265963A CN 107265963 A CN107265963 A CN 107265963A CN 201610214828 A CN201610214828 A CN 201610214828A CN 107265963 A CN107265963 A CN 107265963A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/06—Aluminous cements
- C04B28/065—Calcium aluminosulfate cements, e.g. cements hydrating into ettringite
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Abstract
The invention discloses a kind of superthermal insulation aerogel foam concrete and preparation method thereof, it is characterized in that, aerogel foam concrete is made up of aerogel powder and foam concrete, the aerogel powder is made up of inner hydrophobic layer and surface hydrophilic layer, and the surface hydrophilic thickness degree is 0.1 ~ 100 μm.The preparation method of the superthermal insulation aerogel foam concrete of the present invention comprises the following steps:(1)Aerogel powder is modified;(2)By step(1)Obtained aerogel powder is dry-mixed with binder materials, and then add water wet mixing;(3)By step(2)Obtained wet compound is mixed with preformed foam, stirring.The aerogel foam concrete of the present invention can be widely applied to the fields such as wall thermal insulating, fire prevention, sound insulation and steel structure fireproofing.
Description
Technical field
The present invention relates to a kind of preparation method of building thermal insulation material, more particularly to a kind of superthermal insulation aerogel foam are mixed
Solidifying soil and preparation method thereof, belongs to the fields such as lightweight, thermal insulation, fire prevention, acoustic material.
Background technology
With the development of the society, being on the rise the problems such as energy crisis, environmental degradation.2006,《National economy and society
Develop 11th Five-Year Plan outline》" energy-saving and emission-reduction " concept is proposed first, it is proposed that the Eleventh Five-Year Plan period(2006-2010
Year)Energy consumption per unit reduction by 20% or so, total emissions of major pollutants reduces by 10% the binding indicator." section
Can " promotion " emission reduction ", produce at home in total energy consumption, building energy consumption accounts for 33%, and building energy conservation is the weight of China's energy-saving and emission-reduction cause
In it is weight.According to statistics, the heat loss of wall body structure takes wall the key that heat insulation measure is building energy conservation with respect to highest
Step.
Conventional wall heat insulation material has expanded polystyrene (EPS), polyurathamc, rock wool, thermal insulation mortar, foamed glass, biography
System foam concrete etc..Expanded polystyrene (EPS) and polyurathamc heat-proof quality are excellent, but it meets fiery inflammable, generation asphyxiating
Smog, it is serious to threaten owner's safety;Rock wool heat-proof quality is excellent, but meets water failure, and difficulty of construction is big;Thermal insulation mortar is prevented fires
Performance is good, but thermal conductivity factor is of a relatively high;Foamed glass is easily scaling-off, and cost is higher, influences its engineer applied.
Compared with existing insulation material, foam concrete belongs to A grades of insulation materials, and low excellent with intensity height, cost
Gesture, still, its heat preservation and insulation is not as good as organic foam insulation material.Therefore, the thermal insulation separation of foam concrete is further improved
Hot property is significant.
Aeroge is a kind of light-weight inorganic solid material with three-dimensional network skeleton structure and nanoscale hole hole, with pole
High porosity, specific surface area, extremely low density and solid content, chemical inertness and noninflammability, show excellent lightweight, insulation
The characteristics such as heat-insulated, fire prevention, sound insulation, damping energy-absorbing, thermal conductivity factor can as little as 0.013W/mK.Therefore, if aeroge is added to
It is expected to break through the bottleneck that restriction further improves foam concrete heat preservation and insulation in foam concrete.
However, running into following technical bottleneck in research and development aerogel foam concrete:(1)Due to aerogel powder and coagulation
Native density variation is big, in mixed process, easily occurs phenomenon of phase separation therebetween, it is difficult to be evenly distributed on to cause aeroge
In concrete system, foam concrete mechanical property degradation is caused, and heat-insulating property improves unobvious;(2)It is mixed in foam
In solidifying soil preparation process, aeroge nano-porous structure is easily broken by additive in the water and cement raw material in concrete etc.
It is bad, lose the excellent heat-insulating property that aeroge comes by nano-porous structure characteristic strip;(3)Between aeroge and binder materials often
Chang Yinwei boundary strengths are low, cause foam concrete mechanical property to significantly reduce, and are easily caused aerogel powder from concrete
Come off in matrix.
The content of the invention
For above-mentioned technical problem, the present invention proposes a kind of superthermal insulation aerogel foam concrete and preparation method thereof.
A kind of superthermal insulation aerogel foam concrete, is made up of aerogel powder and foam concrete, the aeroge
Powder is made up of inner hydrophobic layer and surface hydrophilic layer, and the surface hydrophilic thickness degree is 0.1 ~ 100 μm.
A kind of preparation method of superthermal insulation aerogel foam concrete, comprises the following steps:
(1)Aerogel powder is modified;
(2)By step(1)Obtained aerogel powder is dry-mixed with binder materials, and then add water wet mixing;
(3)By step(2)Obtained wet compound is mixed with preformed foam, stirring.
In one of the embodiments, the step(1)Including hydrophobically modified step;The hydrophobically modified is closed
Hydrophobically modified is carried out to aerogel powder in hydrophobic modifier gaseous environment;The hydrophobic modifier is trim,ethylchlorosilane, six
Methyl disilazane, HMDO, MTMS, MTES, dimethylformamide dimethyl epoxide
Silane, dimethyldiethoxysilane, γ-aminopropyltrimethoxysilane, gamma-aminopropyl-triethoxy-silane, γ-(2,3-
The oxygen of epoxy third)Propyl trimethoxy silicane, γ-methacryloxypropyl trimethoxy silane, N-(β-aminoethyl)-γ-
One or more in aminopropyl triethoxysilane.
In one of the embodiments, the step(1)Also include surface hydrophilic modification step;The surface hydrophilic modification
To be modified using surface hydrophilic modification solution to hydrophobic aerogel powder surface;The surface hydrophilic modification solution is surface
The aqueous solution of the aqueous solution or low surface tension solvent of activating agent and low surface tension solvent;The surfactant is anion
One kind or many in type surfactant, cationic surface active agent, amphoteric surfactant, nonionic surface active agent
Kind;The anionic surfactant is fatty alcohol phosphates, aliphatic alcohol polyoxyvinethene phosphate salt, alkylsurfuric acid
Salt, fatty alcohol polyoxyethylene ether sulfate, fatty acid glyceride sulfate, sulphation ricinoleate, cycloalkanes sulfate, fatty acyl
Amine alkyl sulfate, alkylbenzenesulfonate, alkylsulfonate, fatty acid methyl ester ethoxylate sulfonate, fatty acid methyl ester sulphur
One or more in hydrochlorate, aliphatic alcohol polyethenoxy ether carboxylate;The cationic surface active agent is aliphatic ammonium salt;
The amphoteric surfactant is alkyl amino acid, carboxylic acid group's glycine betaine, sulfobetaines, phosphate glycine betaine, alkyl hydroxy
One or more in amine oxide;The nonionic surface active agent is aliphatic polyester, APES, high-carbon
AEO, polyoxyethylene carboxylate, fatty acid methyl ester ethoxylate, the oxireme addition of polypropylene glycol
One or more in thing, sorbitan ester, sucrose fatty ester, alkyl esteramides;The low surface tension solvent is third
One or more mixtures in ketone, n-hexane, pentane, normal heptane, ethanol, isopropanol, the tert-butyl alcohol, propane diols, glycerine.
In one of the embodiments, in the surface hydrophilic modification step, in addition to additional physical field action step;Institute
It is one kind in far infrared radiation, stirring, ultrasonication, ball milling to state additional physical field action step.
In one of the embodiments, the step(1)Also include drying process step;The drying process step is remote
One kind in infra-red drying, spray drying, microwave drying, constant pressure and dry, supercritical drying, subcritical drying, freeze-drying.
In one of the embodiments, the binder materials be portland cement, aluminate cement, sulphate aluminium cement,
Magnesia oxychloride cement, gypsum, lime, waterglass, acrylic emulsion, polyaminoester emulsion, epoxy resin latex, organic siliconresin breast
One or more in liquid, fluorocarbon resin emulsion, polyvinyl alcohol emulsions, ethylene/vinyl acetate copolymer emulsion.
In one of the embodiments, the step(2)And/or the step(3)In can also add phase-change accumulation energy material
One or more in material, lightweight aggregate, admixture, fiber, fire retardant, wood powder, additive.
In one of the embodiments, the phase-changing energy storage material is the inorganic water and salt, higher aliphatic of microcapsule coated
One or more in hydrocarbon, polyalcohol, multi-hydroxy carboxy acid;The lightweight aggregate is haydite, clinker, expanded vermiculite, pelelith, expansion
Perlite, glass bead, light weight sand, polyurethane foam particles, the one or more of polystyrene foam particles;The admixture is
One or more in adding calcium fly ash, II grade of flyash, silicon ash, ground slag powder, phosphorus slag powder;The fiber is polystyrene
One or more in fiber, polypropylene fibre, lignin fibre, alkali-resistant glass fibre, steel fibre;The fire retardant is hydrogen-oxygen
Change one or both of magnesium, aluminium hydroxide;The additive be the surfactant, water reducer, hydrophober, coagulant,
One or more in retarder, thickener, foam stabilizer, preservative;The water reducer is polycarboxylic acids dehydragent, sulfomethylated lignin
One or more in acid sodium-salt water reducer, naphthalene water reducer, aliphatic water reducing agent, amino water reducer;The hydrophober is hard
One or more in sulfonate hydrophober, organosilicon moisture repellent;The coagulant is sodium metasilicate, aluminum sulfate, sodium nitrate, nitric acid
One or more in calcium, sodium sulphate, sodium carbonate, lithium carbonate;The retarder is citric acid, sodium polyphosphate, gelatine albumen
One or more in matter, borax;The thickener is methylcellulose, ethyl cellulose, hydroxymethyl cellulose, ethoxy fibre
Tie up the one or more in element, bentonite, white carbon, starch;The foam stabilizer is polyacrylamide, polyvinyl alcohol, silicones
One or more in polyethers emulsion, DDAO, alkylolamides;The preservative is 1,2- benzisoxas
Thiazoline -3- ketone, CMIT, MIT, (the 2- hydroxyls of 1,3,5- tri-
Ethyl) s-triazine, the one or more in hexahydro -1,3,5- triethyl groups-triazine.
In one of the embodiments, the preformed foam is to use high pressure foaming machine or mechanical agitation by physical blowing agent
Preformed foam is prepared into the mixed solution of water;The physical blowing agent is rosin foaming agent, synthesis class surfactant hair
One or more in infusion, vegetable protein foaming agent, animal protein foaming agent.
Above-mentioned aerogel foam concrete is made up of aerogel powder and foam concrete, and aerogel powder is in foam coagulation
It is uniformly distributed in soil, and keeps nano-porous structure, the thermal conductivity factor of aerogel foam concrete is 0.03 ~ 0.09 W/m
K, compression strength is 0.5 ~ 15.0MPa, can be widely applied to the fields such as wall thermal insulating, fire prevention, sound insulation and steel structure fireproofing.
Embodiment
In order to facilitate the understanding of the purposes, features and advantages of the present invention, specific reality below to the present invention
The mode of applying is described in detail.Many details are elaborated in the following description to fully understand the present invention.But
The invention can be embodied in many other ways as described herein, and those skilled in the art can be without prejudice to this hair
Similar improvement is done in the case of bright intension, therefore the present invention is not limited to the specific embodiments disclosed below.
A kind of embodiment of the superthermal insulation aerogel foam concrete of the present invention, by aerogel powder and foam concrete
Composition, the aerogel powder is made up of inner hydrophobic layer and surface hydrophilic layer, and the surface hydrophilic thickness degree is 0.1 ~ 100 μ
m。
In this way, compared with the existing foam concrete of in the market, aerogel foam concrete of the invention is not reducing mechanics
On the premise of performance, thermal and insulating performance is significantly improved, green building and super low energy consumption and nearly zero energy consumption is widely portable to
The fields such as exterior wall, self heat insulation wall, floor dividing plate and the steel structure fireproofing of building.
In addition, the present invention can not only compound micron-sized aerogel powder and foam concrete, can also by centimetre
The aerogel particle of level is compounded with foam concrete, and retains the nano-porous structure of aeroge.
A kind of preparation method of superthermal insulation aerogel foam concrete, comprises the following steps:
(1)Aerogel powder is modified;
(2)By step(1)Obtained aerogel powder is dry-mixed with binder materials, and then add water wet mixing;
(3)By step(2)Obtained wet compound is mixed with preformed foam, stirring.
In addition, step of the present invention(2)Can also be that binder materials is dry-mixed, then added water wet mixing, and step is added during wet mixing
(1)Obtained aerogel powder.
In this way, the preparation method of the aerogel foam concrete of the present invention has, technique is simple, process cycle is short, sharp useless ring
The advantages such as guarantor, are especially suitable for industrialized production.
In the present embodiment, the step(1)Including hydrophobically modified step;The hydrophobically modified step is closed hydrophobic
Hydrophobically modified is carried out to aerogel powder in modifying agent gaseous environment;The hydrophobic modifier is trim,ethylchlorosilane, hexamethyl
Disilazane, HMDO, MTMS, MTES, dimethyldimethoxysil,ne,
Dimethyldiethoxysilane, γ-aminopropyltrimethoxysilane, gamma-aminopropyl-triethoxy-silane, γ-(2,3- epoxies third
Oxygen)Propyl trimethoxy silicane, γ-methacryloxypropyl trimethoxy silane, N-(β-aminoethyl)- γ-aminopropyl
One or more in triethoxysilane.
In this way, because in existing aeroge preparation method, precursor, displacement solvent and drying process are to the hydrophobic of aeroge
Property have significant effect, if aeroge surface and water contact angle be more than 90 °, hydrophobically modified can not be carried out in advance, directly
Tap into row surface hydrophilic modification;If the surface of aeroge and the contact angle of water are less than 90 °, need to carry out hydrophobic change in advance
Property;Hydrophobically modified is carried out to aerogel powder in closed hydrophobic modifier gaseous environment, except significantly improving airsetting rubber powder
The modified effect of body, it is ensured that outside inside nano-porous structure is not destroyed during follow-up hydrophilic modifying, also significantly improve modification efficiency
And production efficiency, reduce production cost.
In the present embodiment, the step(1)Also include surface hydrophilic modification step;The surface hydrophilic modification step is to adopt
Hydrophobic aerogel powder surface is modified with surface hydrophilic modification solution;The surface hydrophilic modification solution is surface-active
The aqueous solution of the aqueous solution or low surface tension solvent of agent and low surface tension solvent;The surfactant is anionic table
One or more in face activating agent, cationic surface active agent, amphoteric surfactant, nonionic surface active agent;
The anionic surfactant is fatty alcohol phosphates, aliphatic alcohol polyoxyvinethene phosphate salt, alkyl sulfate, fat
Fat alcohol polyoxyethylene ether sulfate, fatty acid glyceride sulfate, sulphation ricinoleate, cycloalkanes sulfate, fatty acid amide alkane
Base sulfate, alkylbenzenesulfonate, alkylsulfonate, fatty acid methyl ester ethoxylate sulfonate, MES,
One or more in aliphatic alcohol polyethenoxy ether carboxylate;The cationic surface active agent is aliphatic ammonium salt;It is described
Amphoteric surfactant is alkyl amino acid, carboxylic acid group's glycine betaine, sulfobetaines, phosphate glycine betaine, alkyl hydroxy oxidation
One or more in amine;The nonionic surface active agent is aliphatic polyester, APES, high carbocyclic aliphatic
Alcohol APEO, polyoxyethylene carboxylate, fatty acid methyl ester ethoxylate, the oxireme addition product of polypropylene glycol,
One or more in sorbitan ester, sucrose fatty ester, alkyl esteramides;The low surface tension solvent be acetone,
One or more in n-hexane, pentane, normal heptane, ethanol, isopropanol, the tert-butyl alcohol, propane diols, glycerine.
In this way, the aqueous solution of the aqueous solution or low surface tension solvent using surfactant and low surface tension solvent,
In hydrophilic modifying processing procedure is carried out to hydrophobic aerogel powder surface there is surface to cooperate with hydrophilic modifying effect, can significantly carry
High surface hydrophilic modification solution aerogel powder surface wetting spreading rate, while significantly slowing to the inside of aerogel powder
Wetting extension, by regulating and controlling the consumption of modified solution, can accurately realize to aerogel powder surface hydrophilic thickness degree
Regulation and control, low surface tension solvent not only with water and surfactant there is surface to cooperate with hydrophilic modifying effect, and can be big
The earth is lowered into the capillary force of the hydrophilic modifying solution in the nano-pore of aerogel powder top layer, it is easy to pass through drying process
Hydrophilic modifying solution in the nano-pore of aerogel powder top layer is evaporated, without destroying its nano-porous structure, the present invention
Aerogel powder present inner hydrophobic, surface hydrophilic, surface hydrophilic layer still retain nano-porous structure and surface hydrophilic thickness
The architectural feature for 0.1 ~ 100 μm is spent, there is good interface cohesion between binder materials;The technique have step it is simple,
The features such as cycle is short, production efficiency is high, it is adaptable to industrialized production.
In the present embodiment, in the surface hydrophilic modification step, in addition to additional physical field action step;The additional thing
It is one kind in far infrared radiation, stirring, ultrasonication, ball milling to manage field action step.
In this way, additional physics field action can significantly improve the activity and and aerogel powder of surface hydrophilic modification solution
Contact probability, reduce dosage of surfactant, improve aerogel powder surface hydrophilic modification speed, reduce cost, improve
Production efficiency.
In the present embodiment, the step(1)Also include drying process step;The drying process step is dry for far infrared
One kind in dry, spray drying, microwave drying, constant pressure and dry, supercritical drying, subcritical drying, freeze-drying.
If in this way, aerogel powder and binder materials compound tense after hydrophilic modifying, the remaining hydrophilic modifying in top layer are molten
Liquid can influence interface cohesion, and processing need to be pre-dried;Using above-mentioned drying process, aerogel powder top layer nano-pore knot is being ensured
On the premise of structure is not destroyed, surface hydrophilic modification solution remaining in the nano-pore of aerogel powder top layer is evaporated, carried
Interface bond strength between high aerogel powder and binder materials.
In the present embodiment, the binder materials is portland cement, aluminate cement, sulphate aluminium cement, chlorine oxygen magnesium water
Mud, gypsum, lime, waterglass, acrylic emulsion, polyaminoester emulsion, epoxy resin latex, silicone resin emulsion, fluorine carbon tree
One or more in fat liquor, polyvinyl alcohol emulsions, ethylene/vinyl acetate copolymer emulsion.
In the present embodiment, the step(2)And/or the step(3)In can also add phase-changing energy storage material, light bone
One or more in material, admixture, fiber, fire retardant, wood powder, additive.
In this way, the step of the present invention(2)Using two step hybrid techniques of dry-mixed-wet mixing, solve because of aerogel powder and its
Cause layering during the big mixing of the difference in specific gravity of his material, realize uniform mixing of the modified aerogels powder in concrete, subtract simultaneously
Few influence of the aerogel powder to foaming process, is conducive to controlling foaming quality, realizes low thermal conductivity factor.
In the present embodiment, the phase-changing energy storage material for microcapsule coated inorganic water and salt, higher aliphatic hydrocarbon, polynary
One or more in alcohol, multi-hydroxy carboxy acid;The lightweight aggregate be haydite, clinker, expanded vermiculite, pelelith, expanded perlite,
Glass bead, light weight sand, polyurethane foam particles, the one or more of polystyrene foam particles;The admixture is increasing calcium powder
One or more in coal ash, II grade of flyash, silicon ash, ground slag powder, phosphorus slag powder;The fiber be styroflex,
One or more in polypropylene fibre, lignin fibre, alkali-resistant glass fibre, steel fibre;The fire retardant be magnesium hydroxide,
One or both of aluminium hydroxide;The additive is the surfactant, water reducer, hydrophober, coagulant, slow setting
One or more in agent, thickener, foam stabilizer, preservative;The water reducer is polycarboxylic acids dehydragent, sodium lignin sulfonate
One or more in salt water reducer, naphthalene water reducer, aliphatic water reducing agent, amino water reducer;The hydrophober is hard sulfonic acid
One or more in salt hydrophober, organosilicon moisture repellent;The coagulant be sodium metasilicate, aluminum sulfate, sodium nitrate, calcium nitrate,
One or more in sodium sulphate, sodium carbonate, lithium carbonate;The retarder be citric acid, sodium polyphosphate, bone glue protein,
One or more in borax;The thickener is methylcellulose, ethyl cellulose, hydroxymethyl cellulose, hydroxy ethyl fiber
One or more in element, bentonite, white carbon, starch;The foam stabilizer is polyacrylamide, polyvinyl alcohol, silicones gather
One or more in ether emulsion, DDAO, alkylolamides;The preservative is 1,2- benzisothias
Oxazoline -3- ketone, CMIT, MIT, (the 2- hydroxyl second of 1,3,5- tri-
Base) s-triazine, the one or more in hexahydro -1,3,5- triethyl groups-triazine.
In this way, phase-changing energy storage material can be absorbed or be discharged a large amount of heat energy by phase transformation, it is of the invention with energy storage effect
Aerogel foam concrete is used for building masonry wall, can adjust architecture indoor temperature, improves comfortable quality of building, saves the energy,
Also, the freezing and thawing performance of aerogel foam concrete of the present invention can be improved by adding phase-changing energy storage material;Lightweight aggregate has
Low density, high compression strength, good heat-insulating property, addition lightweight aggregate can improve aerogel foam concrete mechanicses
Energy, heat-insulating property, substantially do not increase or decrease its density;The workability of concrete can be improved using admixture, stick poly- property, drop
The slump of low concrete, is conducive to the even aperture distribution of aerogel foam concrete, and then improve aerogel foam coagulation
The mechanical property and heat-insulating property of soil;Also, be conducive to the use of industrial waste using admixture, reduce aerogel foam coagulation
The cost of soil, energy-conserving profit waste;Addition fiber can improve the mechanical properties such as the anti-folding of aerogel foam concrete;Add fire retardant
The fire-protection rating of the aerogel foam concrete of the present invention can be improved, because the fire retardants such as magnesium hydroxide, aluminium hydroxide meet fire
Generation is dehydrated the endothermic reaction, extends the elevated speed of substrate temperature;Addition wood powder can improve aerogel foam concrete and anchor
Intensity between firmware, screw;Addition surfactant can improve wetting of the binder materials to surfaces such as fiber, lightweight aggregates and imitate
Rate, and then improve the interface bond strength between binder materials and fiber, binder materials and lightweight aggregate;Addition water reducer can change
Kind concrete flowability and slump, reduce water consumption, improve the mechanical property of aerogel foam concrete;Adding hydrophober can
To significantly reduce the water absorption rate of aerogel foam concrete, particularly the aerogel foam concrete with through-hole structure, improve
The freeze-thaw resistance and weatherability of aerogel foam concrete;The solidification rate that coagulant accelerates binder materials is added, can be reduced
In the presetting period of aerogel foam concrete, reduce aerogel foam concrete aperture so that aerogel foam concrete aperture
It is evenly distributed, improves aerogel foam mechanical performance of concrete and heat-insulating property;Addition retarder can slow down binder materials
Solidification rate, when using gypsum, because gypsum speed is too fast, it is necessary to add retarder regulation firm time;Addition increases
Thick dose can increase concrete viscosity, improve the stability and porosity of foam concrete abscess so that aerogel foam coagulation
The shape of native abscess is generally the ball-type of rule, and then improves the mechanical property and heat-insulating property of aerogel foam concrete;Addition
Foam stabilizer can improve the cell stability and porosity of aerogel foam concrete, and then improve aerogel foam concrete
Mechanical property and heat-insulating property;Addition preservative can avoid aerogel foam concrete from going mouldy, and improve its service life
And durability.
In the present embodiment, the preformed foam is by the mixed of physical blowing agent and water using high pressure foaming machine or mechanical agitation
Close solution and be prepared into preformed foam;The physical blowing agent is rosin foaming agent, synthesis class surfactant foaming agent, plant
One or more in protein foaming agent, animal protein foaming agent.
In this way, previously prepared foams of the invention, then mix foams with wet compound, the gas of excellent performance is made
Gel foam concrete, it is possible to achieve cast in situs is constructed.
Above-mentioned aerogel foam concrete is made up of aerogel powder and foam concrete, and aerogel powder is in foam coagulation
It is uniformly distributed in soil, and keeps nano-porous structure, the thermal conductivity factor of aerogel foam concrete is 0.03 ~ 0.09 W/m
K, compression strength is 0.5 ~ 15.0MPa, can be widely applied to the fields such as wall thermal insulating, fire prevention, sound insulation and steel structure fireproofing.
It is specific embodiment part below.
Embodiment 1
SiO is prepared using following steps2Aerogel foam concrete:
(1)Pending SiO is detected using contact angle measurement2Aerogel powder surface and the contact angle of water, testing result is
55 °, be then 56 μm of SiO by particle diameter2Aerogel powder is positioned in vacuum furnace, with container by the hexamethyl after weighing
Disilazane is positioned in vacuum furnace, heating and gasifying, hydrophobically modified 1.5h, obtains hydrophobic SiO2Aerogel powder, with connecing
Feeler measuring instrument detects hydrophobic SiO2Aerogel powder surface and the contact angle of water, testing result are 147 °;
(2)At room temperature, in mass ratio 1:1:100 weigh ethanol, n-hexane and deionized water, are well mixed, are configured to table
Face hydrophilic modifying solution;
(3)By hydrophobic SiO2The volume ratio 1 of aerogel powder and surface hydrophilic modification solution:3, surface modification solution is weighed, and
Pour into corresponding container, step will be passed through(1)Hydrophobic SiO2Aerogel powder is mixed with surface hydrophilic modification solution, at ball milling
Manage after 25min, take out filtering;
(4)By step(3)Contain the SiO of hydrophilic modifying solution in obtained surface2Aerogel powder is positioned over far infrared drying stove
In, at a temperature of 120 DEG C, 0.5h is dried, furnace cooling is to taking-up after less than 50 DEG C, to SiO2The cross section of aerogel powder is entered
Row detection, testing result shows that surface hydrophilic thickness degree is 7.9 μm;
(5)Step is weighed successively by proportioning(4)Obtained modified SiO2Aerogel powder, 425 Portland cements, haydite,
Redispersable latex powder, hydroxymethyl cellulose, polycarboxylic acids dehydragent, sodium sulphate, carry out dry mixed, obtain dry mixture;
(6)By step(5)Obtained dry mixture adds water carry out wet-mixing, obtains wet compound;
(7)The aqueous solution containing animal protein foaming agent is foamed using foaming machine, the volume ratio of animal protein foaming agent and water
For 1:20, foams are made;
(8)By step(6)Obtained wet compound is mixed with foams, and mechanical agitation 1min produces SiO2Aerogel foam is mixed
Solidifying soil, table 1 is SiO made from the present embodiment2Performance indications of the aerogel foam concrete Jing Guo 28d standard curings.
The SiO of table 12The performance indications of aerogel foam concrete
Embodiment 2
SiO is prepared using following steps2Aerogel foam concrete:
(1)Pending SiO is detected using contact angle measurement2Aerogel powder surface and the contact angle of water, testing result is
45 °, then by SiO of the particle diameter for 0.1mm2Aerogel powder is positioned in vacuum furnace, with container by the front three after weighing
Base chlorosilane is positioned in vacuum furnace, heating and gasifying, hydrophobically modified 1.5h, obtains hydrophobic SiO2Aerogel powder, with connecing
Feeler measuring instrument detects hydrophobic SiO2Aerogel powder surface and the contact angle of water, testing result are 146 °;
(2)At room temperature, in mass ratio 1:0.4:0.4:130 weigh AESA, n-hexane, acetone and
Deionized water, is well mixed, is configured to surface hydrophilic modification solution;
(3)By hydrophobic SiO2The volume ratio 1 of aerogel powder and surface hydrophilic modification solution:3, surface modification solution is weighed, and
Pour into corresponding container, step will be passed through(1)Hydrophobic SiO2Aerogel powder is mixed with surface hydrophilic modification solution, and machinery is stirred
Mix after 15min, rotating speed is 2500 turns/min, filtering;
(4)By step(3)Contain the SiO of hydrophilic modifying solution in obtained surface2Aerogel powder is positioned over far infrared drying stove
In, at a temperature of 120 DEG C, 0.5h is dried, furnace cooling is to taking-up after less than 50 DEG C, to SiO2The cross section of aerogel powder is entered
Row detection, testing result shows that surface hydrophilic thickness degree is 11.1 μm;
(5)Step is weighed successively by proportioning(4)Obtained modified SiO2Aerogel powder, 425 Portland cements, haydite,
Redispersable latex powder, hydroxyethyl cellulose, polycarboxylic acids dehydragent, sodium nitrate, carry out dry mixed, obtain dry mixture;
(6)By step(5)Obtained dry mixture adds water carry out wet-mixing, obtains wet compound;
(7)Foams prepare, using foaming machine to containing vegetable protein foaming agent the aqueous solution foam, vegetable protein foaming agent and
The volume ratio of water is 1:20, foams are made;
(8)Foaming, by step(6)Obtained wet compound is mixed with foams, and mechanical agitation 1min produces SiO2Airsetting calymma
Foam concrete.Table 2 is SiO made from the present embodiment2Performance indications of the aerogel foam concrete Jing Guo 28d standard curings.
The SiO of table 22The performance indications of aerogel foam concrete
Embodiment 3
SiO is prepared using following steps2Aerogel foam concrete:
(1)The SiO that pending particle diameter is 75 μm is detected using contact angle measurement2Contact of the aerogel powder surface with water
Angle, testing result is 141 °, then the SiO2Aerogel powder has hydrophobicity;
(2)At room temperature, in mass ratio 1:0.8:120 weigh sodium alkyl benzene sulfonate, n-hexane and deionized water, are well mixed,
It is configured to surface hydrophilic modification solution;
(3)By hydrophobic SiO2The volume ratio 1 of aerogel powder and surface hydrophilic modification solution:3, surface modification solution is weighed, and
Pour into corresponding container, step will be passed through(1)Hydrophobic SiO2Aerogel powder is mixed with surface hydrophilic modification solution, and machinery is stirred
Mix after 15min, rotating speed is 2000 turns/min, filtering;
(4)By step(3)Contain the SiO of hydrophilic modifying solution in obtained surface2Aerogel powder is positioned in air dry oven,
At a temperature of 120 DEG C, 0.5h is dried, furnace cooling is to taking-up after less than 50 DEG C, to SiO2The cross section of aerogel powder is carried out
Detection, testing result shows that surface hydrophilic thickness degree is 6.0 μm;
(5)Step is weighed successively by proportioning(4)Obtained modified SiO2Aerogel powder, 425 Portland cements, haydite,
Redispersable latex powder, starch, polycarboxylic acids dehydragent, aluminum sulfate, carry out dry mixed, obtain dry mixture;
(6)By step(5)Obtained dry mixture adds water carry out wet-mixing, obtains wet compound;
(7)Prepared by foams, the aqueous solution containing lauryl sodium sulfate foaming agent is foamed using foaming machine, dodecyl sulphur
The volume ratio of sour sodium foaming agent and water is 1:80, foams are made;
(8)Foaming, by step(6)Obtained wet compound is mixed with foams, and mechanical agitation 1min produces SiO2Airsetting calymma
Foam concrete.Table 3 is SiO made from the present embodiment2Performance indications of the aerogel foam concrete Jing Guo 28d standard curings.
The SiO of table 32The performance indications of aerogel foam concrete
Embodiment 4
SiO is prepared using following steps2Aerogel foam concrete:
(1)The SiO that pending particle diameter is 77 μm is detected using contact angle measurement2Contact of the aerogel powder surface with water
Angle, testing result is 140 °, then the SiO2Aerogel powder has hydrophobicity;
(2)At room temperature, in mass ratio 1:1:0.8:200 weigh sodium sulfate of polyethenoxy ether of fatty alcohol, sodium alkyl benzene sulfonate, just
Hexane and deionized water, are well mixed, are configured to surface hydrophilic modification solution;
(3)By hydrophobic SiO2The volume ratio 1 of aerogel powder and surface hydrophilic modification solution:3, surface modification solution is weighed, and
Pour into corresponding container, step will be passed through(1)Hydrophobic SiO2Aerogel powder is mixed with surface hydrophilic modification solution, and machinery is stirred
Mix after 15min, rotating speed is 2500 turns/min, filtering;
(4)By step(3)Contain the SiO of hydrophilic modifying solution in obtained surface2Aerogel powder is positioned over far infrared drying stove
In, at a temperature of 120 DEG C, 0.5h is dried, furnace cooling is to taking-up after less than 50 DEG C, to SiO2The cross section of aerogel powder is entered
Row detection, testing result shows that surface hydrophilic thickness degree is 11.1 μm;
(5)Step is weighed successively by proportioning(4)Obtained modified SiO2Aerogel powder, 425 Portland cements, vitreous are micro-
Pearl, redispersable latex powder, hydroxymethyl cellulose, polycarboxylic acids dehydragent, sodium sulphate, organosilicon moisture repellent, carry out dry method and mix
Close, obtain dry mixture;
(6)By step(5)Obtained dry mixture adds water carry out wet-mixing, obtains wet compound;
(7)Foams prepare, using foaming machine to containing animal protein foaming agent the aqueous solution foam, animal protein foaming agent and
The volume ratio of water is 1:15, foams are made;
(8)Foaming, by step(6)Obtained wet compound is mixed with foams, and mechanical agitation 1min produces SiO2Airsetting calymma
Foam concrete.Table 4 is SiO made from the present embodiment2Performance indications of the aerogel foam concrete Jing Guo 28d standard curings.
The SiO of table 42The performance indications of aerogel foam concrete
Embodiment 5
SiO is prepared using following steps2Aerogel foam concrete:
(1)Pending SiO is detected using contact angle measurement2Aerogel powder surface and the contact angle of water, testing result is
31 °, be then 22 μm of SiO by particle diameter2Aerogel powder is positioned in vacuum furnace, with container by the hexamethyl after weighing
Disilazane is positioned in vacuum furnace, heating and gasifying, hydrophobically modified 2.5h, obtains hydrophobic SiO2Aerogel powder, with connecing
Feeler measuring instrument detects hydrophobic SiO2Aerogel powder surface and the contact angle of water, testing result are 150 °;
(2)At room temperature, in mass ratio 1:0.5:1000 weigh n-hexane, glycerine and deionized water, are well mixed, are configured to
Surface hydrophilic modification solution;
(3)By hydrophobic SiO2The volume ratio 1 of aerogel powder and surface hydrophilic modification solution:3, surface modification solution is weighed, and
Pour into corresponding container, step will be passed through(1)Hydrophobic SiO2Aerogel powder is put into the container being made up of screen pack, together
Immerse in surface hydrophilic modification solution, taken out after 1min;
(4)By step(3)Contain the SiO of hydrophilic modifying solution in obtained surface2Aeroge sheet material is positioned over far infrared drying stove
In, at a temperature of 120 DEG C, 0.5h is dried, furnace cooling is to taking-up after less than 50 DEG C, to SiO2The cross section of aerogel powder is entered
Row detection, testing result shows that surface hydrophilic thickness degree is 2.2 μm;
(5)Step is weighed successively by proportioning(4)Obtained modified SiO2Aerogel powder, 425 Portland cements, half water stone
Cream, polycarboxylic acids dehydragent, sodium citrate, magnesium hydroxide, microcapsule coated octadecane, carry out dry mixed, obtain dry-mixing
Material;
(6)By step(5)Obtained dry mixture adds water and carries out wet-mixing with acrylic emulsion, obtains wet compound;
(7)Prepared by foams, the foaming agent solution being made up of foaming agent, acrylic emulsion and water is foamed using foaming machine, moved
The volume ratio of thing protein foaming agent and water is 1:0.05:80, foams are made;
(8)By step(6)Obtained wet compound is mixed with foams, and mechanical agitation 1min produces SiO2Aerogel foam is mixed
Solidifying soil.Table 5 is SiO made from the present embodiment2Performance indications of the aerogel foam concrete Jing Guo 28d standard curings.
The SiO of table 52The performance indications of aerogel foam concrete
Above-described embodiment is not limited for the present invention preferably embodiment, but embodiments of the present invention by above-described embodiment
System, other any Spirit Essences without departing from the present invention and the change made under principle, modification, replacement, combine, simplification,
Equivalent substitute mode is should be, is included within protection scope of the present invention.
Claims (10)
1. a kind of superthermal insulation aerogel foam concrete, it is characterised in that be made up of aerogel powder and foam concrete, institute
State aerogel powder to be made up of inner hydrophobic layer and surface hydrophilic layer, the surface hydrophilic thickness degree is 0.1 ~ 100 μm.
2. a kind of preparation method of superthermal insulation aerogel foam concrete, it is characterised in that comprise the following steps:
(1)Aerogel powder is modified;
(2)By step(1)Obtained aerogel powder is dry-mixed with binder materials, and then add water wet mixing;
(3)By step(2)Obtained wet compound is mixed with preformed foam, stirring.
3. a kind of preparation method of superthermal insulation aerogel foam concrete according to claim 2, it is characterised in that described
Step(1)Including hydrophobically modified step;The hydrophobically modified step is to airsetting in closed hydrophobic modifier gaseous environment
Rubber powder body carries out hydrophobically modified;The hydrophobic modifier is trim,ethylchlorosilane, HMDS, the silica of hexamethyl two
Alkane, MTMS, MTES, dimethyldimethoxysil,ne, dimethyldiethoxysilane,
γ-aminopropyltrimethoxysilane, gamma-aminopropyl-triethoxy-silane, γ-(The oxygen of 2,3- epoxies third)Propyl trimethoxy silicon
Alkane, γ-methacryloxypropyl trimethoxy silane, N-(β-aminoethyl)One in-gamma-aminopropyl-triethoxy-silane
Plant or a variety of.
4. a kind of preparation method of superthermal insulation aerogel foam concrete according to claim 2, it is characterised in that described
Step(1)Also include surface hydrophilic modification step;The surface hydrophilic modification step is to dredging using surface hydrophilic modification solution
Aerogel powder surface is modified;The surface hydrophilic modification solution is surfactant and the water of low surface tension solvent
The aqueous solution of solution or low surface tension solvent;The surfactant is anionic surfactant, cationic
One or more in activating agent, amphoteric surfactant, nonionic surface active agent;The anionic surfactant
For fatty alcohol phosphates, aliphatic alcohol polyoxyvinethene phosphate salt, alkyl sulfate, fatty alcohol polyoxyethylene ether sulfate,
Fatty acid glyceride sulfate, sulphation ricinoleate, cycloalkanes sulfate, fatty acid amide alkyl sulfate, alkylbenzenesulfonate,
Alkylsulfonate, fatty acid methyl ester ethoxylate sulfonate, MES, aliphatic alcohol polyethenoxy ether carboxylate
In one or more;The cationic surface active agent is aliphatic ammonium salt;The amphoteric surfactant is alkyl ammonia
One or more in base acid, carboxylic acid group's glycine betaine, sulfobetaines, phosphate glycine betaine, alkyl hydroxy amine oxide;It is described non-
Ionic surfactant is aliphatic polyester, APES, high-carbon fatty alcohol polyoxyethylene ether, aliphatic acid polyoxy
Vinyl acetate, fatty acid methyl ester ethoxylate, oxireme addition product, sorbitan ester, the sucrose-fatty of polypropylene glycol
One or more in ester, alkyl esteramides;The low surface tension solvent is acetone, n-hexane, pentane, normal heptane, second
One or more in alcohol, isopropanol, the tert-butyl alcohol, propane diols, glycerine.
5. a kind of preparation method of superthermal insulation aerogel foam concrete according to claim 4, it is characterised in that described
In surface hydrophilic modification step, in addition to additional physical field action step;The additional physical field action step is Far-infrared spoke
Penetrate, stir, one kind in ultrasonication, ball milling.
6. a kind of preparation method of superthermal insulation aerogel foam concrete according to claim 2, it is characterised in that described
Step(1)Also include drying process step;The drying process step is far-infrared ray drying, spray drying, microwave drying, normal pressure
One kind in drying, supercritical drying, subcritical drying, freeze-drying.
7. a kind of preparation method of superthermal insulation aerogel foam concrete according to claim 2, it is characterised in that described
Binder materials is portland cement, aluminate cement, sulphate aluminium cement, magnesia oxychloride cement, gypsum, lime, waterglass, propylene
Yogurt liquid, polyaminoester emulsion, epoxy resin latex, silicone resin emulsion, fluorocarbon resin emulsion, polyvinyl alcohol emulsions, ethene/
One or more in acetate ethylene copolymer emulsion.
8. a kind of preparation method of superthermal insulation aerogel foam concrete according to claim 2, it is characterised in that described
Step(2)And/or the step(3)In can also add phase-changing energy storage material, lightweight aggregate, admixture, fiber, fire retardant, wood
One or more in powder, additive.
9. a kind of preparation method of superthermal insulation aerogel foam concrete according to claim 8, it is characterised in that described
Phase-changing energy storage material is the inorganic water and salt, higher aliphatic hydrocarbon, polyalcohol, one kind in multi-hydroxy carboxy acid or many of microcapsule coated
Kind;The lightweight aggregate is haydite, clinker, expanded vermiculite, pelelith, expanded perlite, glass bead, light weight sand, polyurethane foam
The one or more of particle, polystyrene foam particles;The admixture is adding calcium fly ash, II grade of flyash, silicon ash, levigate
One or more in slag powders, phosphorus slag powder;The fiber is styroflex, polypropylene fibre, lignin fibre, alkaline-resisting
One or more in glass fibre, steel fibre;The fire retardant is one or both of magnesium hydroxide, aluminium hydroxide;Institute
Additive is stated in the surfactant, water reducer, hydrophober, coagulant, retarder, thickener, foam stabilizer, preservative
It is one or more;The water reducer is polycarboxylic acids dehydragent, lignin sulfonic acid sodium salt water reducer, naphthalene water reducer, aliphatic
One or more in water reducer, amino water reducer;The hydrophober is one in hard sulfonate hydrophober, organosilicon moisture repellent
Plant or a variety of;The coagulant is one kind in sodium metasilicate, aluminum sulfate, sodium nitrate, calcium nitrate, sodium sulphate, sodium carbonate, lithium carbonate
Or it is a variety of;The retarder is the one or more in citric acid, sodium polyphosphate, bone glue protein, borax;The thickener
For one kind in methylcellulose, ethyl cellulose, hydroxymethyl cellulose, hydroxyethyl cellulose, bentonite, white carbon, starch
Or it is a variety of;The foam stabilizer is polyacrylamide, polyvinyl alcohol, silicones polyethers emulsion, DDAO, alkane
One or more in base alkylolamides;The preservative is 1,2- benzisothiazole-3-ketones, 5- chloro-2-methyl -4- isothiazole
Quinoline -3- ketone, MIT, 1,3,5- tri- (2- ethoxys) s-triazine, hexahydro -1,3,5- triethyl groups-three
One or more in piperazine.
10. a kind of preparation method of superthermal insulation aerogel foam concrete according to claim 2, it is characterised in that institute
It is that the mixed solution of physical blowing agent and water is prepared into preformed foam using high pressure foaming machine or mechanical agitation to state preformed foam;
The physical blowing agent is rosin foaming agent, synthesis class surfactant foaming agent, vegetable protein foaming agent, animal protein hair
One or more in infusion.
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CN109987963A (en) * | 2017-12-30 | 2019-07-09 | 卢锋 | A kind of aerogel composite and preparation method thereof |
CN111333394A (en) * | 2020-02-13 | 2020-06-26 | 卢加贵 | Hydrophobic foam concrete and preparation method thereof |
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