CN116102779A - Low-heat-conductivity flexible heat-insulating foam and preparation method and application thereof - Google Patents
Low-heat-conductivity flexible heat-insulating foam and preparation method and application thereof Download PDFInfo
- Publication number
- CN116102779A CN116102779A CN202310034172.XA CN202310034172A CN116102779A CN 116102779 A CN116102779 A CN 116102779A CN 202310034172 A CN202310034172 A CN 202310034172A CN 116102779 A CN116102779 A CN 116102779A
- Authority
- CN
- China
- Prior art keywords
- heat
- foam
- silicon source
- thermal conductivity
- low
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000006260 foam Substances 0.000 title claims abstract description 43
- 238000002360 preparation method Methods 0.000 title abstract description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 36
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 33
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 33
- 239000010703 silicon Substances 0.000 claims abstract description 33
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims abstract description 26
- BFXIKLCIZHOAAZ-UHFFFAOYSA-N methyltrimethoxysilane Chemical compound CO[Si](C)(OC)OC BFXIKLCIZHOAAZ-UHFFFAOYSA-N 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000003054 catalyst Substances 0.000 claims abstract description 17
- 239000006261 foam material Substances 0.000 claims abstract description 14
- 239000002904 solvent Substances 0.000 claims abstract description 14
- 238000004321 preservation Methods 0.000 claims abstract description 12
- 239000003377 acid catalyst Substances 0.000 claims abstract description 5
- 238000001035 drying Methods 0.000 claims description 19
- 239000011148 porous material Substances 0.000 claims description 17
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 13
- 238000005187 foaming Methods 0.000 claims description 11
- 230000002378 acidificating effect Effects 0.000 claims description 9
- 230000032683 aging Effects 0.000 claims description 9
- 239000011810 insulating material Substances 0.000 claims description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 6
- 239000012774 insulation material Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 239000002937 thermal insulation foam Substances 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 4
- 239000001569 carbon dioxide Substances 0.000 claims description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 3
- 230000007935 neutral effect Effects 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 239000002131 composite material Substances 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 6
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 6
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 239000000523 sample Substances 0.000 description 6
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 4
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 150000001336 alkenes Chemical class 0.000 description 3
- 235000011114 ammonium hydroxide Nutrition 0.000 description 3
- 229920001400 block copolymer Polymers 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 230000007062 hydrolysis Effects 0.000 description 3
- 238000006460 hydrolysis reaction Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 description 2
- DDFHBQSCUXNBSA-UHFFFAOYSA-N 5-(5-carboxythiophen-2-yl)thiophene-2-carboxylic acid Chemical compound S1C(C(=O)O)=CC=C1C1=CC=C(C(O)=O)S1 DDFHBQSCUXNBSA-UHFFFAOYSA-N 0.000 description 2
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 2
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 description 2
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 description 2
- ROSDSFDQCJNGOL-UHFFFAOYSA-N Dimethylamine Chemical compound CNC ROSDSFDQCJNGOL-UHFFFAOYSA-N 0.000 description 2
- QUSNBJAOOMFDIB-UHFFFAOYSA-N Ethylamine Chemical compound CCN QUSNBJAOOMFDIB-UHFFFAOYSA-N 0.000 description 2
- BAVYZALUXZFZLV-UHFFFAOYSA-N Methylamine Chemical compound NC BAVYZALUXZFZLV-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 229920005830 Polyurethane Foam Polymers 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 239000004433 Thermoplastic polyurethane Substances 0.000 description 2
- 235000012538 ammonium bicarbonate Nutrition 0.000 description 2
- 239000001099 ammonium carbonate Substances 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000005038 ethylene vinyl acetate Substances 0.000 description 2
- 235000006408 oxalic acid Nutrition 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 239000011496 polyurethane foam Substances 0.000 description 2
- WGYKZJWCGVVSQN-UHFFFAOYSA-N propylamine Chemical compound CCCN WGYKZJWCGVVSQN-UHFFFAOYSA-N 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 2
- GEYOCULIXLDCMW-UHFFFAOYSA-N 1,2-phenylenediamine Chemical compound NC1=CC=CC=C1N GEYOCULIXLDCMW-UHFFFAOYSA-N 0.000 description 1
- WZCQRUWWHSTZEM-UHFFFAOYSA-N 1,3-phenylenediamine Chemical compound NC1=CC=CC(N)=C1 WZCQRUWWHSTZEM-UHFFFAOYSA-N 0.000 description 1
- CBCKQZAAMUWICA-UHFFFAOYSA-N 1,4-phenylenediamine Chemical compound NC1=CC=C(N)C=C1 CBCKQZAAMUWICA-UHFFFAOYSA-N 0.000 description 1
- HXKKHQJGJAFBHI-UHFFFAOYSA-N 1-aminopropan-2-ol Chemical compound CC(O)CN HXKKHQJGJAFBHI-UHFFFAOYSA-N 0.000 description 1
- KDJNNYXXPNIWGP-UHFFFAOYSA-N 2-methylprop-1-ene triethoxysilane Chemical compound C(C)O[SiH](OCC)OCC.C=C(C)C KDJNNYXXPNIWGP-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 description 1
- HPNMFZURTQLUMO-UHFFFAOYSA-N diethylamine Chemical compound CCNCC HPNMFZURTQLUMO-UHFFFAOYSA-N 0.000 description 1
- WEHWNAOGRSTTBQ-UHFFFAOYSA-N dipropylamine Chemical compound CCCNCCC WEHWNAOGRSTTBQ-UHFFFAOYSA-N 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229940102253 isopropanolamine Drugs 0.000 description 1
- 229940018564 m-phenylenediamine Drugs 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 239000012229 microporous material Substances 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920005604 random copolymer Polymers 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 235000017550 sodium carbonate Nutrition 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- UQMOLLPKNHFRAC-UHFFFAOYSA-N tetrabutyl silicate Chemical compound CCCCO[Si](OCCCC)(OCCCC)OCCCC UQMOLLPKNHFRAC-UHFFFAOYSA-N 0.000 description 1
- LFQCEHFDDXELDD-UHFFFAOYSA-N tetramethyl orthosilicate Chemical compound CO[Si](OC)(OC)OC LFQCEHFDDXELDD-UHFFFAOYSA-N 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- IWICDTXLJDCAMR-UHFFFAOYSA-N trihydroxy(propan-2-yloxy)silane Chemical compound CC(C)O[Si](O)(O)O IWICDTXLJDCAMR-UHFFFAOYSA-N 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/36—After-treatment
- C08J9/40—Impregnation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/06—Polyethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/08—Copolymers of ethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/10—Homopolymers or copolymers of propene
- C08J2323/12—Polypropene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2353/00—Characterised by the use of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/54—Improvements relating to the production of bulk chemicals using solvents, e.g. supercritical solvents or ionic liquids
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
The invention relates to the technical field of composite foam materials, in particular to the field of IPCC09D125, and more particularly relates to a low-heat-conduction flexible heat-preservation foam and a preparation method and application thereof. A low thermal conductivity flexible insulating foam comprising the components of: silicon source, water, alcohol, alkaline catalyst, acid catalyst, micro-open cell foam material and solvent. When the silicon source comprises tetraethoxysilane and methyltrimethoxysilane, the heat conductivity coefficient of the foam can be reduced; the weight ratio of the tetraethoxysilane to the methyltrimethoxysilane is 1: (2-6) wherein the resilience performance of the foam can be improved; silicon source, water: the molar ratio of alcohol is 1: (1-6): (3-10) further reducing the thermal conductivity of the foam.
Description
Technical Field
The invention relates to the technical field of composite foam materials, in particular to the field of IPCC09D125, and more particularly relates to a low-heat-conduction flexible heat-preservation foam and a preparation method and application thereof.
Background
From the last 70 th century, attention has been paid to the production of heat insulating materials and the use thereof in buildings, and the aim has been to reduce the consumption of energy sources drastically, thereby reducing environmental pollution and the greenhouse effect, and new heat insulating materials have been continuously emerging, but the energy saving of heating and air conditioning of houses and offices has been an important issue, and recently, the heat insulation of information and communication devices, vehicles and electric appliances has also become more important. Because of the limited insulation space and the complex shape required, flexible thin high performance insulation materials are required. At present, flexible rubber and plastic heat-insulating foam and hard polyurethane foam are used more, but the flexible rubber and plastic heat-insulating foam has higher heat conductivity coefficient, and the hard polyurethane foam is not easy to bend.
CN105236913B discloses a preparation method of fiber reinforced inorganic thermal insulation foam, comprising: adding reticular glass fibers into the mixture, mixing, and sintering to obtain fiber reinforced inorganic heat preservation foam; wherein the mixture comprises sodium silicate aqueous solution. The method is simple to operate, has no waste emission in the preparation process, has low sintering temperature, can save energy and reduce emission, and is suitable for industrial production; the obtained fiber reinforced inorganic heat preservation foam has the advantages of higher strength, durability, long service life, small density and high compressive strength. But the density of the inorganic heat-insulating foam is larger than 120kg/m 3 The thermal conductivity is higher by 0.0578W/(mK).
Disclosure of Invention
The invention provides a low-heat-conductivity flexible heat-insulating foam and a preparation method and application thereof.
To achieve the object of the present invention, the first aspect of the present invention provides a low thermal conductivity flexible thermal insulation foam, comprising: silicon source, water, alcohol, alkaline catalyst, acid catalyst, micro-open cell foam material and solvent.
The silicon source comprises at least one of tetraethoxysilane, methyl orthosilicate, butyl orthosilicate, isopropyl orthosilicate, isobutene triethoxysilane and methyltrimethoxysilane.
Preferably, the silicon source comprises ethyl orthosilicate, methyltrimethoxysilane; the weight ratio of the tetraethoxysilane to the methyltrimethoxysilane is 1: (2-6).
The applicant found that when the silicon source comprises tetraethoxysilane and methyltrimethoxysilane, the heat conductivity coefficient of foam can be reduced, the tetraethoxysilane is hydrolyzed to form a multi-molecular crosslinked silicon network polymer, the smaller pore diameter reduces the heat conductivity coefficient of the heat insulation material, but most groups on the surface are hydrophilic hydroxyl groups, the internal structure is easy to collapse in the drying process, the heat conductivity coefficient is increased, the methyltrimethoxysilane is added to improve the stability of pores, a certain amount of methyl exists in a three-dimensional network formed by the methyltrimethoxysilane, and the interpenetrating network is formed with the tetraethoxysilane, and simultaneously, the lower surface tension of the three-dimensional network is endowed, so that the pore diameter of the network is stabilized, and further research finds that the weight ratio of the tetraethoxysilane to the methyltrimethoxysilane is 1: and (2-6), the rebound resilience performance of the foam can be improved, and it is supposed that certain difference exists between the hydrolysis speeds of two specific silicon sources, and the difference of the hydrolysis speeds improves the average length of the cross-linking points of the interpenetrating network to a certain extent, and improves the distribution uniformity of the cross-linking points, so that the constraint of molecules on chain segment movement is reduced, and the rebound resilience performance of the foam is improved.
Further preferably, the weight ratio of the tetraethoxysilane to the methyltrimethoxysilane is 1: (2-4).
Still more preferably, the silicon source comprises ethyl orthosilicate, methyltrimethoxysilane; the weight ratio of the tetraethoxysilane (CAS: 78-10-4) to the methyltrimethoxysilane (CAS: 1185-55-3) is 1:3.
the applicant found that a silicon source, water: the molar ratio of alcohol is 1: (1-6): (3-10) further reducing the thermal conductivity of the foam, and increasing the ratio of alcohol to silicon source, the voids between the sol frames are increased, and the holes formed by the deposition are enlarged. However, when the alcohol is too much, the surface tension of the obtained product is too large in the drying process due to too much solvent, resulting in collapse of the internal structure of the sol, thereby deteriorating the performance of the sol. As the amount of water increases, the hydrolysis rate increases, but too much water tends to cause discontinuous distribution of the internal pores of the sol, and at the same time increases the drying time in the subsequent drying process, and may also affect the wettability with the micro-porous material, possibly the surface tension effect of water, further studies have found that the silicon source, water: the molar ratio of alcohol is 1: (2-5): in the step (5-9), the prepared sol can enable the micro-open pore foaming material with the aperture of between 100 and 500 mu m to be well soaked, the bending performance of the foaming material is improved, and the possibility that the sol three-dimensional network structure shares part of stress. In particular, when the open porosity of the micro-porous foam material is 85-95%, the pore diameter is 200-500 μm, the micro-porous foam material is suitable for being used as a heat insulation material in a vehicle, and the high open porosity and the pore diameter possibly improve the content of sol, so that the flexibility of the material is improved, the heat conductivity coefficient is reduced, and the micro-porous foam material is suitable for the interior of an automobile with limited heat insulation space and complex shape.
Preferably, the silicon source, water: the molar ratio of alcohol is 1: (1-6): (3-10).
Further preferably, the silicon source, water: the molar ratio of alcohol is 1: (2-5): (5-9).
Still further preferably, the silicon source, water: the molar ratio of alcohol is 1:4:8.
the acidic catalyst comprises at least one of hydrochloric acid, nitric acid, phosphoric acid or oxalic acid.
Preferably, the acidic catalyst comprises at least one of hydrochloric acid and oxalic acid.
Further preferably, the acidic catalyst comprises 1.0mol/L dilute hydrochloric acid.
The alkaline catalyst comprises one or more of sodium hydroxide, potassium hydroxide, ammonia water, ammonium fluoride, ammonium bicarbonate, sodium carbonate, sodium bicarbonate, ethanolamine, diethanolamine, methylamine, dimethylamine, ethylamine, diethylamine, propylamine, dipropylamine, isopropanolamine, aniline, o-phenylenediamine, m-phenylenediamine and p-phenylenediamine.
Preferably, the alkaline catalyst comprises one or more of sodium hydroxide, potassium hydroxide, ammonia water, ammonium fluoride and ammonium bicarbonate.
Further preferably, the basic catalyst comprises 1.0mol/L ammonia.
The alcohol comprises at least one of methanol, ethanol and n-butanol.
Preferably, the alcohol comprises ethanol.
Preferably, the micro-porous foam material comprises one of polypropylene (PP), polyethylene (PE), thermoplastic polyurethane elastomer (TPU), polyurethane (PU), olefin Block Copolymer (OBC), ethylene-vinyl acetate copolymer (EVA), ethylene-1-octene random copolymer (POE).
Preferably, the open porosity of the micro-porous foam material is 80-95%, and the pore diameter is 100-500 μm.
Further preferably, the open porosity of the micro-porous foam material is 85-95%, and the pore diameter is 200-500 μm.
Still more preferably, the micro-porous foamed material comprises an Olefin Block Copolymer (OBC), has an open cell content of 90 and a pore size of 400 μm, and is self-made by the company, model: DMN-K1.
The solvent comprises at least one of ethanol, n-butanol and acetone.
Preferably, the solvent comprises ethanol.
The invention provides a preparation method of a low-heat-conduction flexible heat-preservation foam, which comprises the following steps of:
s1, uniformly mixing alcohol, water and a silicon source, adding an acidic catalyst, and adjusting the pH value to be acidic to obtain silica sol;
s2, slowly and dropwise adding an alkaline catalyst into the silica sol under stirring, regulating the pH value to be neutral, and standing at room temperature to obtain a silica sol solution;
s3, immersing the micro-open pore foaming material into the silica sol solution, and vacuumizing for 2 times to obtain pre-heat-preservation foam;
and S4, after ageing, placing the mixture in a supercritical carbon dioxide autoclave, adding a solvent, and drying to obtain the heat-insulating material.
The volume ratio of the micro-open pore foaming material to the silica sol solution is 1: (5-20).
Preferably, the volume ratio of the micro-open foam material to the silica sol solution is 1:10.
preferably, the weight ratio of the solvent to the pre-heat-preserving foam is (0.1-0.4): 1.
further preferably, the weight ratio of the solvent to the pre-heat insulating foam is 0.1:1.
the pH value in the step 1 is 2-5.
Preferably, the pH in step 1 is 3.
Preferably, the vacuum degree of the vacuumizing is-0.06 to-0.1 MPa, and the interval time between two vacuumizing is 3-15min.
Further preferably, the vacuum degree of the vacuumizing is-0.06 MPa, and the interval time between two vacuumizing is 5min.
Preferably, the drying temperature is 70-100 ℃, the drying pressure is 15-25MPa, and the drying time is 1-2h.
Further preferably, the drying temperature is 100 ℃, the drying pressure is 20MPa, and the drying time is 1h.
Preferably, the aging temperature is 20-60 ℃, and the aging time is 1-6d.
Further preferably, the aging temperature is 40 ℃, and the aging time is 4d.
In a third aspect, the present invention provides the use of a flexible insulating foam of low thermal conductivity as an insulating material for at least one of a vehicle, a house, and an electrical appliance.
Preferably, the foam is applied as a thermal insulation material to the vehicle interior.
The beneficial effects are that:
1. when the silicon source comprises tetraethoxysilane and methyltrimethoxysilane, the heat conductivity coefficient of the foam can be reduced.
2. The weight ratio of the tetraethoxysilane to the methyltrimethoxysilane is 1: and (2-6), the resilience performance of the foam can be improved.
3. Silicon source, water: the molar ratio of alcohol is 1: (1-6): (3-10) further reducing the thermal conductivity of the foam.
4. When the aperture ratio of the micro-porous foaming material is 85-95%, the aperture is 200-500 mu m, and the micro-porous foaming material is suitable for being used as a heat insulation material in a vehicle.
Detailed Description
Example 1
A low thermal conductivity flexible insulating foam comprising the components of: silicon source, water, alcohol, alkaline catalyst, acid catalyst, micro-open cell foam material and solvent.
The silicon source is 10 parts by weight.
The silicon source comprises tetraethoxysilane and methyltrimethoxysilane; the weight ratio of the tetraethoxysilane (CAS: 78-10-4) to the methyltrimethoxysilane (CAS: 1185-55-3) is 1:3.
the silicon source, water: the molar ratio of alcohol is 1:4:8.
the acidic catalyst comprises 1.0mol/L dilute hydrochloric acid.
The alkaline catalyst comprises 1.0mol/L ammonia water.
The alcohol comprises ethanol.
The micro-pore foaming material comprises an Olefin Block Copolymer (OBC), the aperture ratio is 90%, the aperture diameter is 400 mu m, and the micro-pore foaming material is self-made by the company, and has the model: DMN-K1.
The solvent comprises ethanol.
A preparation method of a low-heat-conduction flexible heat-preservation foam comprises the following steps:
s1, uniformly mixing alcohol, water and a silicon source (800 rpm), adding an acid catalyst, and regulating the pH value to be acidic to obtain silica sol;
s2, slowly and dropwise adding an alkaline catalyst into the silica sol under stirring (controlling the dropwise adding speed and finishing dropwise adding in 3 min), adjusting the pH value to be neutral, and standing at room temperature (25 ℃) to obtain a silica sol solution;
s3, immersing the micro-open pore foaming material into the silica sol solution, and vacuumizing for 2 times to obtain pre-heat-preservation foam;
and S4, after ageing, placing the mixture in a supercritical carbon dioxide autoclave, adding a solvent, and drying to obtain the heat-insulating material.
The volume ratio of the micro-open pore foaming material to the silica sol solution is 1:10.
the weight ratio of the solvent to the pre-heat-preservation foam is 0.1:1.
the pH value in the step 1 is 3.
The vacuum degree of the vacuumizing is-0.06 MPa, and the interval time between the two vacuumizing is 5min.
The drying temperature is 100 ℃, the drying pressure is 20MPa, and the drying time is 1h.
The aging temperature is 40 ℃, and the aging time is 4d.
The application of a low thermal conductivity flexible insulating foam as an insulating material for vehicle interiors.
Example 2
The detailed description is the same as example 1; in contrast, the weight ratio of ethyl orthosilicate to methyltrimethoxysilane described in example 2 was 1:2.
example 3
The detailed description is the same as example 1; except that the silicon source, water, described in example 3: the molar ratio of alcohol is 1:5:5.
comparative example 1
The detailed description is the same as example 1; except that the silicon source, water, described in comparative example 1: the molar ratio of alcohol is 1:4:8.
comparative example 2
The detailed description is the same as example 1; in contrast, the silicon source described in comparative example 2 included ethyl orthosilicate (CAS: 78-10-4).
Comparative example 3
The detailed description is the same as example 1; in contrast, the silicon source described in comparative example 3 included ethyl orthosilicate, methyltrimethoxysilane; the weight ratio of the tetraethoxysilane (CAS: 78-10-4) to the methyltrimethoxysilane (CAS: 1185-55-3) is 1:5.
performance test method
The insulating foams obtained in examples 1-3 and comparative examples 1-3 were subjected to the following performance tests, the test data being shown in Table 1.
Thermal conductivity coefficient: the heat conductivity coefficient tester with Hot Disk as probe is based on TPS transient plane heat source technology. Instrument: multifunctional rapid thermal conductivity coefficient tester for DRE-III of Xiangtan Xiangxiao instruments, inc.
Tear strength: the test was performed with reference to the ISO/DIS 8067 standard.
Falling ball rebound and impact rebound: the test was performed with reference to GB/T6670-2008 standard.
Shore hardness (a): the sample was placed on a firm flat surface and the presser pins were pressed against the sample smoothly 12mm from the edge of the sample, with the presser pins pressed vertically into the sample until the presser pins and the sample were in full contact for 1s of reading. Hardness values were measured 5 times at different positions at least 6mm apart at the measuring points, and the average was taken, instrument: HTS-800A digital display Shore hardness tester produced by Shanghai Yi Jib precision instruments Co., ltd.
Performance test data
TABLE 1
Claims (10)
1. The low-heat-conduction flexible heat-preservation foam is characterized by comprising the following components: silicon source, water, alcohol, alkaline catalyst, acid catalyst, micro-open cell foam material and solvent.
2. The low thermal conductivity flexible insulating foam of claim 1, wherein the silicon source, water: the molar ratio of alcohol is 1: (1-6): (3-10).
3. A low thermal conductivity flexible insulating foam according to claim 2, wherein the silicon source, water: the molar ratio of alcohol is 1: (2-5): (5-9).
4. A low thermal conductivity flexible thermal insulation foam according to claim 3, wherein said micro-open cell foam material has an open cell content of 80-95% and a cell size of 100-500 μm.
5. A low thermal conductivity flexible insulating foam according to claim 1, wherein said silicon source comprises ethyl orthosilicate, methyltrimethoxysilane; the weight ratio of the tetraethoxysilane to the methyltrimethoxysilane is 1: (2-4).
6. A low thermal conductivity flexible insulation foam according to claim 1 or 4, wherein said micro-cellular foam comprises one of PP, PE, PU, TPU, OBC, EVA, POE.
7. A method of preparing a low thermal conductivity flexible insulating foam according to any one of claims 1 to 6, comprising the steps of:
s1, uniformly mixing alcohol, water and a silicon source, adding an acidic catalyst, and adjusting the pH value to be acidic to obtain silica sol;
s2, slowly and dropwise adding an alkaline catalyst into the silica sol under stirring, regulating the pH value to be neutral, and standing at room temperature to obtain a silica sol solution;
s3, immersing the micro-open pore foaming material into the silica sol solution, and vacuumizing for 2 times to obtain pre-heat-preservation foam;
and S4, after ageing, placing the mixture in a supercritical carbon dioxide autoclave, adding a solvent, and drying to obtain the heat-insulating material.
8. The method for preparing the low-heat-conductivity flexible heat-preservation foam according to claim 7, wherein the vacuum degree of vacuumizing is-0.06 to-0.1 MPa, and the interval time between two vacuumizing is 3-15min.
9. The method for preparing the low-heat-conductivity flexible heat-insulating foam according to claim 8, wherein the drying temperature is 70-100 ℃, the drying pressure is 15-25MPa, and the drying time is 1-2h.
10. Use of the low thermal conductivity flexible thermal insulation foam according to claim 1, wherein the foam is applied as a thermal insulation material in at least one of a vehicle, a house, an electric appliance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310034172.XA CN116102779A (en) | 2023-01-10 | 2023-01-10 | Low-heat-conductivity flexible heat-insulating foam and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310034172.XA CN116102779A (en) | 2023-01-10 | 2023-01-10 | Low-heat-conductivity flexible heat-insulating foam and preparation method and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116102779A true CN116102779A (en) | 2023-05-12 |
Family
ID=86259284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310034172.XA Pending CN116102779A (en) | 2023-01-10 | 2023-01-10 | Low-heat-conductivity flexible heat-insulating foam and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116102779A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102351494A (en) * | 2011-07-20 | 2012-02-15 | 厦门大学 | Method for preparing foam material reinforced silica aerogel composite material |
| KR20130004533A (en) * | 2010-11-17 | 2013-01-11 | 이동희 | Manufacture method of inorganic foam using geopolymer silica sol.gel method |
| CN105968789A (en) * | 2016-04-27 | 2016-09-28 | 宁波高新区夏远科技有限公司 | Lightweight organic-inorganic composite heat insulation foam material and preparation method thereof |
| CN111848114A (en) * | 2020-07-31 | 2020-10-30 | 航天海鹰(镇江)特种材料有限公司 | Super heat-insulating aerogel composite material and preparation process thereof |
-
2023
- 2023-01-10 CN CN202310034172.XA patent/CN116102779A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130004533A (en) * | 2010-11-17 | 2013-01-11 | 이동희 | Manufacture method of inorganic foam using geopolymer silica sol.gel method |
| CN102351494A (en) * | 2011-07-20 | 2012-02-15 | 厦门大学 | Method for preparing foam material reinforced silica aerogel composite material |
| CN105968789A (en) * | 2016-04-27 | 2016-09-28 | 宁波高新区夏远科技有限公司 | Lightweight organic-inorganic composite heat insulation foam material and preparation method thereof |
| CN111848114A (en) * | 2020-07-31 | 2020-10-30 | 航天海鹰(镇江)特种材料有限公司 | Super heat-insulating aerogel composite material and preparation process thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109403022B (en) | Method for preparing aerogel/non-woven composite material with hydrophilicity or hydrophobicity and product thereof | |
| CN113135732B (en) | Chopped glass fiber silicon dioxide aerogel composite material and preparation method thereof | |
| CN108383487B (en) | PAN pre-oxidized fiber felt/silicon dioxide aerogel composite material and preparation method thereof | |
| US10696557B2 (en) | Apparatus and method for manufacturing aerogel sheet | |
| CN113896505B (en) | Method for discontinuously producing aerogel felt | |
| CN109734412B (en) | Secondary drying method for preparing hydrophobic aluminum-silicon aerogel heat insulation material | |
| CN112852196B (en) | Aerogel coating and preparation method thereof, and aerogel coating and preparation method thereof | |
| CN110565366B (en) | Preparation method of silicon aerogel composite material | |
| CN114100534A (en) | Preparation method of silicon-aluminum binary aerogel composite material | |
| CN109575355A (en) | A kind of flame-proof polyethylene alcohol radical composite crosslinking aeroge coating hard polyurethane foamed material and preparation method thereof | |
| CN109265734A (en) | A method of foam of polymers anti-flammability is improved by aerosil thermal insulation fire-proof layer | |
| CN112080932A (en) | Method for producing silica aerogel composite fiber blanket | |
| CN104909375A (en) | Method for rapidly preparing hydrophobicsilica aerogel by carbon dioxidesubcritical drying method | |
| CN108484952A (en) | A kind of preparation method of composite heat-insulated material | |
| CN116102779A (en) | Low-heat-conductivity flexible heat-insulating foam and preparation method and application thereof | |
| CN109081327A (en) | A kind of bowl-shape porous carbon microsphere and preparation method thereof | |
| CN111574917A (en) | Preparation method of composite material for polyurethane water-based paint | |
| CN112646229A (en) | Preparation method of organic silicon aerogel with super-amphiphobic performance | |
| CN115010140B (en) | Preparation method of super-hydrophobic silica aerogel | |
| CN115043408B (en) | Flexible silica aerogel, aerogel felt and preparation method thereof | |
| CN106986605B (en) | Silica aerogel prepared by pure water system and production method | |
| CN115155470B (en) | Ordered carbon-polysiloxane composite aerogel and preparation method and application thereof | |
| CN112142057B (en) | Aerogel and preparation method thereof based on constant-temperature constant-humidity drying | |
| CN115849391A (en) | Preparation method of hydrophobic silica aerogel material | |
| CN111233379A (en) | Foamed geopolymer/aerogel composite heat-insulating material and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |