CN107522500A - A kind of composite heat-insulated material and its production method, application - Google Patents

A kind of composite heat-insulated material and its production method, application Download PDF

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Publication number
CN107522500A
CN107522500A CN201710716552.6A CN201710716552A CN107522500A CN 107522500 A CN107522500 A CN 107522500A CN 201710716552 A CN201710716552 A CN 201710716552A CN 107522500 A CN107522500 A CN 107522500A
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China
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composite heat
insulated material
heat
protection tube
insulated
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李统占
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Tianjin Xinyu Heat Insulating Material Co Ltd
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Tianjin Xinyu Heat Insulating Material Co Ltd
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Priority to CN201710716552.6A priority Critical patent/CN107522500A/en
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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
    • C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C04B38/0045—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by a process involving the formation of a sol or a gel, e.g. sol-gel or precipitation processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B1/00—Layered products having a non-planar shape
    • B32B1/08—Tubular products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B9/047—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material made of fibres or filaments
    • 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
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/04—Silica-rich materials; Silicates
    • C04B14/06—Quartz; Sand
    • C04B14/064—Silica aerogel
    • 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
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/38—Fibrous materials; Whiskers
    • C04B14/383—Whiskers
    • 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
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/38—Fibrous materials; Whiskers
    • C04B14/46—Rock wool ; Ceramic or silicate fibres
    • C04B14/4643—Silicates other than zircon
    • C04B14/4656—Al-silicates, e.g. clay
    • 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
    • C04B30/00—Compositions for artificial stone, not containing binders
    • C04B30/02—Compositions for artificial stone, not containing binders containing fibrous materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/106—Carbon fibres, e.g. graphite fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/304—Insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/558—Impact strength, toughness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2597/00—Tubular articles, e.g. hoses, pipes
    • 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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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Civil Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Insulation (AREA)

Abstract

The invention discloses a kind of composite heat-insulated material, its drip irrigation device is to include 20 40 parts of alumina silicate fibre, 22 38 parts of aerosil, 6 14 parts of catalyst, 14 24 parts of crystal whisker of hexa potassium titanate, it can also allow material that there is good mechanical property while having reached raising material effect of heat insulation, allow material that there is wider purposes.

Description

A kind of composite heat-insulated material and its production method, application
Technical field
The present invention relates to heating engineering tubing field, more particularly to a kind of composite heat-insulated material and its production method, application.
Background technology
Heat preserving and insulating material refers to the material or composite body to hot-fluid with notable resistance, heat preserving and insulating material Common feature is lightweight, loose, wherein inorganic with the conduction of the immobilising air barrier heat in its inside in cellular or threadiness Material has non-ignitable, temperature in use is wide, chemical resistance is preferable etc..
The existing Chinese patent for referring to Publication No. CN102503482A, it discloses a kind of lower thermal conductivity to be modified leech Stone composite heat-insulated material and preparation method thereof, every gram of expanded vermiculite match somebody with somebody 10~20ml aluminum salt solutions, urea with aluminum salt solution The amount ratio of Al3+ material is (volume ratio of 8~15) ︰ 1, the concentrated sulfuric acid and aluminum salt solution is 1 ︰ (400~500).First by above-mentioned Raw material proportioning mixes expanded vermiculite, urea, the concentrated sulfuric acid and aluminum salt solution, is stirred 18~32 hours at 80~100 DEG C, elutes PERFORMANCE OF MODIFIED VERMICULITE is obtained after drying.Mixed again by raw material of 40~80wt% PERFORMANCE OF MODIFIED VERMICULITE and 20~60wt% forsterite, Additional 10~the 20wt% of raw material phosphate dihydrogen aluminum solution, stirring is compressing, and 2 are incubated under the conditions of 500~650 DEG C ~5h, produces low-thermal conductivity modified vermiculite composite thermal insulation material.
The species of heat-barrier material has a many kinds, but most insulation material would generally compare concern material in itself every Hot property, and the mechanical property of material in itself is ignored, so as to cause material easily to occur in processing, transport, work progress Broken, damage.
The content of the invention
It is an object of the invention to provide a kind of composite heat-insulated material, serves and allows material to have good mechanical property, allows Material has wider purposes.
The present invention above-mentioned technical purpose technical scheme is that：A kind of composite heat-insulated material, bag Alumina silicate fibre 20-40 parts, aerosil 22-38 parts, catalyst 6-14 parts, crystal whisker of hexa potassium titanate 14-24 parts are included.
Pass through above-mentioned technical proposal, aerosil is a kind of lightweight nano solid material, simultaneously because aeroge Good effect of heat insulation can be played with good thermal conductivity factor, and add whisker and fiber in aeroge to increase The intensity of aerogel material in itself, simultaneously because fiber and whisker fall within heat-barrier material, therefore can further play every The effect of heat, can also allow material to have good mechanical property while being finally reached raising material effect of heat insulation, allow material Material has wider purposes.
Preferably, every kilogram of silicon dioxide aerosol includes siliceous raw material 100-300g, remaining as solvent.
Pass through above-mentioned technical proposal, colloid material is finally produced by the complex reaction of siliceous raw material and solvent and catalyst Material, it can ensure that aeroge is more stable.
Preferably, siliceous raw material includes one in following tetraethyl orthosilicate, methyl silicate, more polysilanes, Ludox Kind is a variety of.
Pass through above-mentioned technical proposal, the selection of siliceous raw material can allow obtained material to turn into flexible material, Neng Gougeng Add and adapt to the operating mode that some needs deform, and be more suitable for the outer wall for being added to tubing.
Preferably, solvent has the one or more included in following methanol, ethanol, isopropanol.
Pass through above-mentioned technical proposal, the solvent of alcohols are the indispensable solvents for preparing flexible silicon dioxide aerosol.
Preferably, catalyst is acidic catalyst and base catalyst.
Pass through above-mentioned technical proposal, the selection of catalyst can promote siliceous material that polycondensation reaction occurs, and can allow preparation Process is smoothed out.
Preferably, acidic catalyst includes the one or more in hydrochloric acid, nitric acid, acetic acid, hydrofluoric acid.
Pass through above-mentioned technical proposal, the optional scope of acidic catalyst than wide, can from it is above-mentioned it is a variety of in select One or more are added, and in acid condition, siliceous material is easier to react.
Preferably, base catalyst includes the one or more in ammoniacal liquor, sodium hydroxide.
Pass through above-mentioned technical proposal, the use of base catalyst can equally assist siliceous material generation further anti- Should, it is easy to promote the progress of whole preparation process.
The purpose of the present invention two：A kind of preparation method of composite heat-insulated material, includes following steps：
S1：By the one or more and methanol, ethanol, isopropyl in tetraethyl orthosilicate, methyl silicate, more polysilanes, Ludox One or more in alcohol are mixed and are sufficiently stirred 15min；
S2：When adding acidic catalyst, ph values are 4, carry out fully reaction 20-48h；When addition base catalyst to solution PH To 10.2,20-48h is fully reacted；
S3：By alumina silicate fibre, crystal whisker of hexa potassium titanate mixed with the solution in previous step and carry out gel aging and The sheet material of required thickness is made in supercritical drying；
S4：Carry out carrying out high-temperature heat treatment 30min-2h at 100 DEG C -300 DEG C.
Pass through above-mentioned technical proposal, carry out sufficiently reaction comparing in for a long time and can allow the flexible silica of acquisition Aeroge is more uniformly, stably.
The purpose of the present invention three：A kind of insulation direct-buried pipe with outer protection tube, the composite heat-insulated material are applied to insulation In the outer protection tube of direct-buried pipe.
Preferably, including instrumentation tubes, outer protection tube and polyurethane insulation coating, polyurethane insulation coating is fixed in the side of instrumentation tubes On wall, outer protection tube is socketed on the outside of polyurethane insulation coating, and side of the outer protection tube away from polyurethane insulation coating is connected with carbon fiber Overcoat, the columnar heat-insulated addition made of the composite heat-insulated material is provided between carbon fiber protective layer and outer protection tube Layer.
Pass through above-mentioned technical proposal, function of heat insulation further can be carried out to insulating tube using heat-insulated adding layers, together When due to having used yielding flexible sheet, it is possible to heat-insulated adding layers are designed according to various sizes of outer protection tube caliber Profile, ensure that heat-insulated adding layers can be very good to be used.
In summary, the invention has the advantages that：
1st, the setting of carbon fiber overcoat and heat-insulated adding layers can increase tubing intensity in itself and anti-impact force；
2 while add heat-insulated adding layers again in the outside of outer protection tube and can ensure safety of the tubing in moving process, reduce Influence of the external impact force to tubing, ensure tubing when mounted intact.
Embodiment
The present invention is described in further detail below.
Embodiment 1, a kind of composite heat-insulated material, include alumina silicate fibre 40g, siliceous raw material 11.4g, methanol 34.01g, ammoniacal liquor 14g, crystal whisker of hexa potassium titanate 24g.
Heat-barrier material preparation technology：Include following steps：
S1：By the one or more and methanol, ethanol, isopropyl in tetraethyl orthosilicate, methyl silicate, more polysilanes, Ludox One or more in alcohol are mixed and are sufficiently stirred 15min；
S2：Ammoniacal liquor is added to solution PH to 10.2, fully reacts 20h；
S3：By alumina silicate fibre, crystal whisker of hexa potassium titanate mixed with the solution in previous step and carry out gel aging and The sheet material of required thickness is made in supercritical drying；
S4：Carry out carrying out high-temperature heat treatment 2h at 300 DEG C.
Embodiment 2, a kind of composite heat-insulated material, include alumina silicate fibre 20g, siliceous raw material 2.2g, methanol 14.3g, Sodium hydroxide 6g, crystal whisker of hexa potassium titanate 14g.
Heat-barrier material preparation technology：Include following steps：
S1：By the one or more and methanol, ethanol, isopropyl in tetraethyl orthosilicate, methyl silicate, more polysilanes, Ludox One or more in alcohol are mixed and are sufficiently stirred 15min；
S2：When adding sodium hydroxide to solution PH to 10.2,20-48h is fully reacted；
S3：By alumina silicate fibre, crystal whisker of hexa potassium titanate mixed with the solution in previous step and carry out gel aging and The sheet material of required thickness is made in supercritical drying；
S4：Carry out carrying out high-temperature heat treatment 30min at 100 DEG C DEG C.
Embodiment 3, a kind of composite heat-insulated material, include alumina silicate fibre 30g, siliceous raw material 6.8, methanol 24.15g, Ammoniacal liquor 10g, crystal whisker of hexa potassium titanate 19g.
Heat-barrier material preparation technology：Include following steps：
S1：By the one or more and methanol, ethanol, isopropyl in tetraethyl orthosilicate, methyl silicate, more polysilanes, Ludox One or more in alcohol are mixed and are sufficiently stirred 15min；
S2：When adding ammoniacal liquor to solution PH to 10.2,20-48h is fully reacted；
S3：By alumina silicate fibre, crystal whisker of hexa potassium titanate mixed with the solution in previous step and carry out gel aging and The sheet material of required thickness is made in supercritical drying；
S4：Carry out carrying out high-temperature heat treatment 75min at 150 DEG C.
Embodiment 4, a kind of composite heat-insulated material, include alumina silicate fibre 20g, siliceous raw material 6.8g, methanol 24.15g, Ammoniacal liquor 10g, crystal whisker of hexa potassium titanate 14g.
Heat-barrier material preparation technology：Include following steps：
S1：By the one or more and methanol, ethanol, isopropyl in tetraethyl orthosilicate, methyl silicate, more polysilanes, Ludox One or more in alcohol are mixed and are sufficiently stirred 15min；
S2：Nitric acid is added, ph values are 4, carry out fully reaction 20-48h；
S3：By alumina silicate fibre, crystal whisker of hexa potassium titanate mixed with the solution in previous step and carry out gel aging and The sheet material of required thickness is made in supercritical drying；
S4：Carry out carrying out high-temperature heat treatment 30min at 100 DEG C DEG C.
Embodiment 5, a kind of composite heat-insulated material, include alumina silicate fibre 40g, siliceous raw material 6.8g, ethanol 24.15g, Ammoniacal liquor 10g crystal whisker of hexa potassium titanate 24g.
Heat-barrier material preparation technology：Include following steps：
S1：By the one or more and methanol, ethanol, isopropyl in tetraethyl orthosilicate, methyl silicate, more polysilanes, Ludox One or more in alcohol are mixed and are sufficiently stirred 15min；
S2：Nitric acid is added, ph values are 4, carry out fully reaction 20-48h；
S3：By alumina silicate fibre, crystal whisker of hexa potassium titanate mixed with the solution in previous step and carry out gel aging and The sheet material of required thickness is made in supercritical drying；
S4：Carry out carrying out high-temperature heat treatment 2h at 300 DEG C.
Comparative example is tested
Comparative example 1, a kind of composite heat-insulated material, include alumina silicate fibre 30g, siliceous raw material 6.8g, ethanol 24.15g, ammoniacal liquor 10g。
Heat-barrier material preparation technology：Include following steps：
S1：By the one or more and methanol, ethanol, isopropyl in tetraethyl orthosilicate, methyl silicate, more polysilanes, Ludox One or more in alcohol are mixed and are sufficiently stirred 15min；
S2：When adding ammoniacal liquor to solution PH to 10.2,20-48h is fully reacted；
S3：By alumina silicate fibre, crystal whisker of hexa potassium titanate mixed with the solution in previous step and carry out gel aging and The sheet material of required thickness is made in supercritical drying；
S4：Carry out carrying out high-temperature heat treatment 75min at 150 DEG C.
Comparative example 2：A kind of composite heat-insulated material, include siliceous raw material 6.8g, ethanol 24.15g, ammoniacal liquor 10g, six metatitanic acids Potassium whisker 19g.
Heat-barrier material preparation technology：Include following steps：
S1：By the one or more and methanol, ethanol, isopropyl in tetraethyl orthosilicate, methyl silicate, more polysilanes, Ludox One or more in alcohol are mixed and are sufficiently stirred 15min；
S2：Ammoniacal liquor is added to solution PH to 10.2, fully reacts 48h；
S3：By alumina silicate fibre, crystal whisker of hexa potassium titanate mixed with the solution in previous step and carry out gel aging and The sheet material of required thickness is made in supercritical drying；
S4：Carry out carrying out high-temperature heat treatment 75min at 150 DEG C.
Comparative example 3：A kind of composite heat-insulated material, siliceous raw material 6.8g, ethanol 24.15g, ammoniacal liquor 10g.
Heat-barrier material preparation technology：Include following steps：
S1：By the one or more and methanol, ethanol, isopropyl in tetraethyl orthosilicate, methyl silicate, more polysilanes, Ludox One or more in alcohol are mixed and are sufficiently stirred 15min；
S2：When adding ammoniacal liquor to solution PH to 10.2,20-48h is fully reacted；
S3：By alumina silicate fibre, crystal whisker of hexa potassium titanate mixed with the solution in previous step and carry out gel aging and The sheet material of required thickness is made in supercritical drying；
S4：Carry out carrying out high-temperature heat treatment 75min at 150 DEG C.
Thermal conductivity factor detects：
Nai Chi instruments 's application experiment room (YB/T 4130-2005)；Measuring method:Heat flow method；Tester Device:HFM436/3/IER heat flow method conductometers；Sample size:200mmX200mmX10mm；Test temperature:25℃.
Bend resistance performance detection：Bend resistance experiment is carried out from experiment block of the universal testing machine to 200mmX200mmX10mm Detection.
Porosity detects：The porosity of material is detected by mercury injection method.
By between comparative example and embodiment contrast can with obvious discovery after it with the addition of whisker and fiber, every The thermal conductivity factor of hot material has obvious decline, simultaneously because the addition of fiber, bend resistance is being carried out to blocks of solid During experiment, even if the situation that trial target 90-degree bent will not still fracture, the bend resistance of the material of script is significantly improved Ability, meanwhile, large effect is not caused to the porosity of material after it with the addition of fiber and whisker, ensure that heat conduction system Number will not increase, and whisker due to addition and fiber equally have heat insulating function, therefore with the addition of whisker in general With the material of fiber can further reinforcing material heat-insulating capability.
This specific embodiment is only explanation of the invention, and it is not limitation of the present invention, people in the art Member can make the modification of no creative contribution to the present embodiment as needed after this specification is read, but as long as at this All protected in the right of invention by Patent Law.

Claims (10)

  1. A kind of 1. composite heat-insulated material, it is characterised in that：Include alumina silicate fibre 20-40 parts, aerosil 22-38 Part, catalyst 6-14 parts, crystal whisker of hexa potassium titanate 14-24 parts.
  2. A kind of 2. composite heat-insulated material according to claim 1, it is characterised in that：Every kilogram of silicon dioxide aerosol includes There is siliceous raw material 100-300g, remaining as solvent.
  3. A kind of 3. composite heat-insulated material according to claim 2, it is characterised in that：Siliceous raw material includes following positive silicic acid One or more in ethyl ester, methyl silicate, more polysilanes, Ludox.
  4. A kind of 4. composite heat-insulated material according to claim 2, it is characterised in that：Solvent, which has, includes following methanol, second One or more in alcohol, isopropanol.
  5. A kind of 5. composite heat-insulated material according to claim 1, it is characterised in that：Catalyst is acidic catalyst or alkalescence Catalyst.
  6. A kind of 6. composite heat-insulated material according to claim 5, it is characterised in that：Acidic catalyst includes hydrochloric acid, nitre One or more in acid, acetic acid, hydrofluoric acid.
  7. A kind of 7. composite heat-insulated material according to claim 5, it is characterised in that：Base catalyst includes ammoniacal liquor, hydrogen One or more in sodium oxide molybdena.
  8. A kind of 8. preparation method of composite heat-insulated material, it is characterised in that：Include following steps：
    S1：By the one or more and methanol, ethanol, isopropyl in tetraethyl orthosilicate, methyl silicate, more polysilanes, Ludox One or more in alcohol are mixed and are sufficiently stirred 15min；
    S2：When adding acidic catalyst, ph values are 4, fully reaction 20-48h are carried out, when addition base catalyst to solution ph To 10.2,20-48h is fully reacted；
    S3：By alumina silicate fibre, crystal whisker of hexa potassium titanate mixed with the solution in previous step and carry out gel aging and The sheet material of required thickness is made in supercritical drying；
    S4：Carry out carrying out high-temperature heat treatment 30min-2h at 100 DEG C -300 DEG C.
  9. A kind of 9. insulation direct-buried pipe with outer protection tube, it is characterised in that：The composite heat-insulated material is applied to insulation direct-buried pipe Outer protection tube in.
  10. A kind of 10. insulation direct-buried pipe with outer protection tube according to claim 9, it is characterised in that：Include instrumentation tubes, Outer protection tube and polyurethane insulation coating, polyurethane insulation coating are fixed in the side wall of instrumentation tubes, and outer protection tube is socketed in polyurethane heat-insulation Layer outside, side of the outer protection tube away from polyurethane insulation coating is connected with carbon fiber overcoat, carbon fiber protective layer and outer protection tube Between be provided with the columnar heat-insulated adding layers made of the composite heat-insulated material.
CN201710716552.6A 2017-08-19 2017-08-19 A kind of composite heat-insulated material and its production method, application Pending CN107522500A (en)

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Application publication date: 20171229