CN116476462A - Heat-preserving moisture-preserving curing film and preparation method and application thereof - Google Patents
Heat-preserving moisture-preserving curing film and preparation method and application thereof Download PDFInfo
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- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 239000004567 concrete Substances 0.000 claims abstract description 42
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 26
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229910000077 silane Inorganic materials 0.000 claims abstract description 25
- 239000000835 fiber Substances 0.000 claims abstract description 13
- 239000010902 straw Substances 0.000 claims abstract description 12
- 239000002994 raw material Substances 0.000 claims abstract description 11
- 239000011159 matrix material Substances 0.000 claims abstract description 10
- 229920001971 elastomer Polymers 0.000 claims abstract description 9
- 239000000806 elastomer Substances 0.000 claims abstract description 9
- 229920000728 polyester Polymers 0.000 claims abstract description 9
- 239000000945 filler Substances 0.000 claims abstract description 8
- 239000000758 substrate Substances 0.000 claims abstract description 4
- 238000012423 maintenance Methods 0.000 claims description 18
- 238000002156 mixing Methods 0.000 claims description 12
- 230000007062 hydrolysis Effects 0.000 claims description 10
- 238000006460 hydrolysis reaction Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 239000012528 membrane Substances 0.000 claims description 8
- 238000004321 preservation Methods 0.000 claims description 8
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims description 7
- 239000006185 dispersion Substances 0.000 claims description 7
- 229910052901 montmorillonite Inorganic materials 0.000 claims description 7
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims description 6
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 3
- 229910001919 chlorite Inorganic materials 0.000 claims description 3
- 229910052619 chlorite group Inorganic materials 0.000 claims description 3
- QBWCMBCROVPCKQ-UHFFFAOYSA-N chlorous acid Chemical compound OCl=O QBWCMBCROVPCKQ-UHFFFAOYSA-N 0.000 claims description 3
- 239000010445 mica Substances 0.000 claims description 3
- 229910052618 mica group Inorganic materials 0.000 claims description 3
- NMEPHPOFYLLFTK-UHFFFAOYSA-N trimethoxy(octyl)silane Chemical compound CCCCCCCC[Si](OC)(OC)OC NMEPHPOFYLLFTK-UHFFFAOYSA-N 0.000 claims description 3
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052849 andalusite Inorganic materials 0.000 claims description 2
- SCPWMSBAGXEGPW-UHFFFAOYSA-N dodecyl(trimethoxy)silane Chemical compound CCCCCCCCCCCC[Si](OC)(OC)OC SCPWMSBAGXEGPW-UHFFFAOYSA-N 0.000 claims description 2
- 239000010433 feldspar Substances 0.000 claims description 2
- 239000002223 garnet Substances 0.000 claims description 2
- 239000011521 glass Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 239000010450 olivine Substances 0.000 claims description 2
- 229910052609 olivine Inorganic materials 0.000 claims description 2
- 239000010453 quartz Substances 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- 239000000454 talc Substances 0.000 claims description 2
- 229910052623 talc Inorganic materials 0.000 claims description 2
- HXOGQBSDPSMHJK-UHFFFAOYSA-N triethoxy(6-methylheptyl)silane Chemical compound CCO[Si](OCC)(OCC)CCCCCC(C)C HXOGQBSDPSMHJK-UHFFFAOYSA-N 0.000 claims description 2
- UDUKMRHNZZLJRB-UHFFFAOYSA-N triethoxy-[2-(7-oxabicyclo[4.1.0]heptan-4-yl)ethyl]silane Chemical compound C1C(CC[Si](OCC)(OCC)OCC)CCC2OC21 UDUKMRHNZZLJRB-UHFFFAOYSA-N 0.000 claims description 2
- 239000004005 microsphere Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 15
- 238000001704 evaporation Methods 0.000 abstract description 3
- 230000008020 evaporation Effects 0.000 abstract description 3
- 238000001723 curing Methods 0.000 description 53
- 239000010410 layer Substances 0.000 description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 26
- 238000009413 insulation Methods 0.000 description 16
- 230000000052 comparative effect Effects 0.000 description 14
- 239000003054 catalyst Substances 0.000 description 8
- 239000000047 product Substances 0.000 description 5
- 238000005507 spraying Methods 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- 230000002378 acidificating effect Effects 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 238000013008 moisture curing Methods 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
- 238000001029 thermal curing Methods 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000001680 brushing effect Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000005338 heat storage Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000413 hydrolysate Substances 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 150000007524 organic acids Chemical class 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920005749 polyurethane resin Polymers 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- XTIIITNXEHRMQL-UHFFFAOYSA-N tripotassium methoxy(trioxido)silane Chemical compound [K+].[K+].[K+].CO[Si]([O-])([O-])[O-] XTIIITNXEHRMQL-UHFFFAOYSA-N 0.000 description 2
- 238000009736 wetting Methods 0.000 description 2
- 239000004970 Chain extender Substances 0.000 description 1
- 239000004111 Potassium silicate Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- -1 hydrotalcite-like Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- PAZHGORSDKKUPI-UHFFFAOYSA-N lithium metasilicate Chemical compound [Li+].[Li+].[O-][Si]([O-])=O PAZHGORSDKKUPI-UHFFFAOYSA-N 0.000 description 1
- 229910052912 lithium silicate Inorganic materials 0.000 description 1
- 239000011325 microbead Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- 229910052913 potassium silicate Inorganic materials 0.000 description 1
- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical compound [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- 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
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
- B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
-
- 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
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
-
- 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
- B32B9/045—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 of synthetic resin
-
- 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
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
-
- 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
- B32B2262/06—Vegetal fibres
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses a heat-preserving moisture-preserving curing film, a preparation method and application thereof, wherein the heat-preserving moisture-preserving curing film comprises a substrate layer, a hydrophilic layer and a hydrophobic layer which are sequentially overlapped; the preparation raw materials of the matrix layer comprise straw fibers; the hydrophilic layer is prepared from hydrophilic silane and filler; the preparation raw materials of the hydrophobic layer comprise polyester elastomer and hydrophobic silane, and the heat-preserving moisture-preserving curing film has an elastic structure with outer hydrophobic property and inner hydrophilic property, so that the mechanical property of the heat-preserving moisture-preserving curing film is improved, the porosity of the heat-preserving moisture-preserving curing film is reduced, the moisture evaporation of concrete is effectively prevented, and the heat-preserving moisture-preserving effect of the heat-preserving moisture-preserving curing film is improved.
Description
Technical Field
The invention belongs to the field of biodegradable heat-preserving moisture-preserving curing films, and particularly relates to a heat-preserving moisture-preserving curing film, a preparation method and application thereof.
Background
After concrete is poured, moisture in the concrete can evaporate too fast to form a dehydration phenomenon, cement particles which form gel cannot be hydrated sufficiently and cannot be converted into stable crystals, and the cement particles lack enough cohesive force, so that flaky or powdery falling off can occur on the surface of the concrete. And (3) sprinkling curing, curing with curing agent, building a shed, and curing with heat storage. The water spraying maintenance belongs to natural maintenance, and mainly comprises two kinds of spray maintenance and surface running water maintenance. The spray curing generally causes water to be in a mist shape, can not form water flow, can not directly pressurize the surface of concrete by the water mist, and is suitable for projects with complex structure and careful curing work; the surface of the concrete structure is covered by the water flow during the running water curing, the water flow cannot be too large, the scouring phenomenon cannot be formed on the surface of the concrete, the peeling damage is caused, and part of engineering experience proves that the temperature of the surface layer of the concrete can be effectively reduced and the phenomenon of concrete dry cracking is prevented during the running water curing of the concrete. Along with the social development, a large number of complex concrete structures are continuously emerging, the surface of the structure presents irregularity, the surface area is increased, and the water is extremely easy to evaporate. The continuous wetting state of the concrete surface is difficult to maintain in practical engineering application, and the sprinkling curing effect is poor; meanwhile, the problem of serious water resource waste is accompanied by water spraying maintenance, and for projects in remote areas, the water supply maintenance cost is high due to lack of local water resources, and the water spraying maintenance is not suitable. The curing agent is sprayed on the surface of concrete, and after the solution volatilizes, a layer of continuous waterproof sealing film is formed on the surface of the concrete, and the film accumulates most of the scattered water in the concrete for autotrophy, so that the film has a longer effective period, and the concrete can be cured well. The curing agent curing is suitable for concrete in high-altitude building parts and arid and water-deficient areas which are difficult to be cured by sprinkling and covering curing modes, but has higher requirements on construction, is easily influenced by the conditions of missing brushing, missing spraying and uneven brushing, has influence on the bonding performance between new and old concrete, has larger influence on the toughness of the film due to the spraying thickness, and has an unclear curing effect in complex weather environments. The shed curing belongs to heating curing, and is suitable for curing the concrete with the requirements of wind prevention, heat insulation and sun shading or curing the concrete with the daily average air temperature of more than 15 ℃ below zero to 10 ℃ below zero in a low-temperature environment. The greenhouse curing method can be based on greenhouse curing, and a radiator, a calandria, an electric heater or a stove and the like are arranged in the greenhouse to heat air in the greenhouse, so that concrete is cured in an environment with the temperature above zero. But the maintenance construction of the shed is troublesome, the construction resource is occupied, the cost is high, the turnover rate is low, and the application range is small. The heat accumulating curing belongs to a curing method which utilizes heat generated by hydration reaction of concrete after pouring and external heat preservation measures to delay cooling so that the concrete reaches the expected required strength when cooled to minus. The heat storage maintenance method is simple, does not need concrete heating equipment, can save energy, has lower cost, improves the durability of concrete, and has strict requirements on construction measures.
Therefore, there is a need to prepare a curing film capable of solving the problems of poor heat preservation and moisture preservation in concrete curing.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the prior art described above. Therefore, the invention provides a heat-preserving moisture-preserving curing film, which comprises a matrix layer, a hydrophilic layer and a hydrophobic layer which are sequentially overlapped, wherein the matrix layer which is the raw material of straw fibers is coated with the hydrophilic layer and then coated with the hydrophobic layer, so that the heat-preserving moisture-preserving curing film has an elastic structure with outer hydrophobic property and inner hydrophilic property, the mechanical property of the heat-preserving moisture-preserving curing film is improved, the porosity of the heat-preserving moisture-preserving curing film is reduced, the moisture evaporation of concrete is effectively prevented, the heat-preserving moisture-preserving effect of the heat-preserving moisture-preserving curing film is improved, the hydrophilic layer of the invention ensures the wetting of the concrete surface layer, the moisture permeates into capillary holes of surface concrete, chemical reaction occurs to form colloid substances, the concrete surface layer can be densified in a short time, and the crack-preventing shrinkage-resisting effect can be achieved at the stage of hardening the concrete, so that the pore channel inside the concrete is blocked, the self-hydrophobic property of an autoclaved aerated concrete slab is endowed, and the waterproofness of the autoclaved aerated concrete slab is greatly enhanced; in addition, the film layer characteristic of the first hydrophobic additive is beneficial to improving the toughness of the autoclaved aerated concrete plate, improving the product performance of the autoclaved aerated concrete plate and improving the curing effect.
The second aspect of the invention provides a preparation method of the heat-preserving moisture-preserving curing film.
The third aspect of the invention provides an application of the curing film in the field of concrete curing.
According to an embodiment of the first aspect of the present invention, a thermal-insulation moisture-retention curing film is provided, which includes a substrate layer, a hydrophilic layer and a hydrophobic layer that are sequentially stacked;
the preparation raw materials of the matrix layer comprise straw fibers;
the preparation raw materials of the hydrophilic layer comprise hydrophilic silane and filler;
the preparation raw materials of the hydrophobic layer comprise polyester elastomer and hydrophobic silane.
Embodiments according to the first aspect of the invention have at least the following advantageous effects:
the matrix layer prepared by taking the straw fiber as the raw material is low in cost and easy to degrade, and the hydrophilic layer is coated outside the matrix layer and then the hydrophobic layer is coated. On one hand, the hydrophilic layer swells after absorbing water in cooperation with the filler, so that the gas barrier property is improved, the corrosion of microorganisms is prevented, the heat insulation effect of the curing membrane is improved, the chain segment structure consisting of a hard chain segment (consisting of isocyanate and a small molecular chain extender) and a soft chain segment (consisting of oligomeric polyol) in the polyurethane resin molecular structure in the hydrophobic layer determines the unique property of the polyurethane resin molecular structure, the mechanical property of the heat insulation and moisture preservation curing membrane is effectively improved, meanwhile, the corrosion of rainwater is avoided under the cooperation of hydrophobic silane, the gas barrier property of the hydrophilic layer is ensured, and the heat insulation effect of the curing membrane is improved.
According to some embodiments of the invention, the polyester elastomer comprises Vanilla8539。
According to some embodiments of the invention, the straw fiber comprises a fermented straw fiber.
According to some embodiments of the invention, the hydrophobic silane comprises: at least one of n-octyltrimethoxysilane, isooctyltriethoxysilane and n-dodecyltrimethoxysilane.
According to some embodiments of the invention, the hydrophilic silane comprises: at least one of gamma-glycidoxypropyl trimethoxysilane and beta- (3, 4-epoxycyclohexyl) -ethyl triethoxysilane.
According to some embodiments of the invention, the filler comprises at least one of mica, talc, hydrotalcite-like, glass microbeads, quartz, chlorite, calcium carbonate, feldspar, olivine, garnet, and andalusite.
The filler expands in volume after absorbing water, so that pores in the straw fiber-based heat-preserving moisture-preserving curing film are effectively filled, a fiber network becomes denser, the blocking effect on diffusion gas or liquid molecules is achieved, the straw fiber-based heat-preserving moisture-preserving curing film has an excellent gas blocking effect, and the water vapor permeability of an inner layer is reduced.
In some embodiments of the present invention, the preparation raw materials of the hydrophobic layer further include: an alkaline catalyst; the basic catalyst comprises: at least one of potassium silicate, lithium silicate and potassium methyl silicate.
In some embodiments of the present invention, the hydrophilic layer further comprises: an acidic catalyst; the acidic catalyst comprises: at least one of an inorganic acid and a water-soluble organic acid.
In some preferred embodiments of the invention, the mineral acid comprises: at least one of hydrochloric acid and phosphoric acid.
In some preferred embodiments of the present invention, the water-soluble organic acid comprises: acetic acid.
According to an embodiment of the second aspect of the present invention, there is provided a method for preparing a thermal-insulation moisture-retention curing film, the method comprising the steps of:
s1: the hydrophilic silane is hydrolyzed to obtain a hydrophilic silane hydrolysis product, and the hydrophilic silane hydrolysis product is coated on the surface of the matrix layer to obtain a composite layer;
s2: mixing the polyester elastomer and the hydrophobic silane to react to obtain modified dispersion 1;
s3: mixing the modified dispersion 1 obtained in the step S2 with the composite layer obtained in the step S1.
According to some embodiments of the invention, the mass ratio of the polyester elastomer and the hydrophobic silane in step S2 is 1: (0.05-0.1).
According to some embodiments of the invention, in step S2, the mixing time is 0.5-1h.
In some embodiments of the invention, in step S2, the rotational speed of the mixing is 2000-5000r/min.
In some embodiments of the invention, in step S2, further comprising adding the basic catalyst between the mixing and reacting.
In some embodiments of the invention, in step S2, the pH of the reaction is 8-10.
In some embodiments of the invention, in step S1, the hydrolysis is accompanied by stirring; the stirring speed is 200-500r/min.
In some embodiments of the invention, in step S1, the hydrolyzing further comprises adding the acidic catalyst.
In some embodiments of the invention, in step S1, the PH of the hydrolysis is 5-6.
In some embodiments of the invention, in step S1, the reaction time of the hydrolysis is 1-2 hours.
In some embodiments of the invention, in step S3, the mass ratio of the modified dispersion 1 to the hydrophilic silane hydrolysis product is 1: (0.075-0.125).
In some preferred embodiments of the invention, in step S3, the mass ratio of the modified dispersion 1 to the hydrophilic silane hydrolysis product is 1: (0.085-0.105).
In some embodiments of the invention, in step S3, the rotational speed of the mixing is 300-500r/min.
In some embodiments of the invention, in step S3, the mixing is for a period of 2-3 hours.
An embodiment according to a third aspect of the present invention proposes the use of a curing membrane in the field of concrete curing.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
The conception and the technical effects produced by the present invention will be clearly and completely described in conjunction with the embodiments below to fully understand the objects, features and effects of the present invention. It is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments, and that other embodiments obtained by those skilled in the art without inventive effort are within the scope of the present invention based on the embodiments of the present invention.
Example 1
The embodiment prepares a heat-preserving moisture-preserving curing film, which comprises the following specific steps:
s1, mixing 50 parts of montmorillonite, 70 parts of gamma-glycidoxypropyl trimethoxy silane and 80 parts of deionized water in a dispersing machine at room temperature, controlling the rotating speed to 300r/min, adding an acidic hydrochloric acid catalyst to control the pH value of the mixture to be 5-6, and reacting for 1h to obtain a hydrophilic silane hydrolysate;
s2, uniformly mixing the fermented straw fibers, the sizing agent and the retention aid in a water phase system, performing negative pressure forming by negative pressure forming equipment, and manufacturing a matrix layer by heat preservation and moisture preservation curing film drying equipment at the temperature of 103+/-2 ℃; coating the hydrolysate obtained in the step S1 on a substrate layer to obtain a composite layer;
s3, dispersing 150 parts of polyester elastomer in a homogenizing emulsifier at room temperature, setting 2500r/min at the rotating speed, slowly adding 5 parts of n-octyl trimethoxy silane, controlling the adding time to be 15min, stirring for 1h at the rotating speed after finishing, reducing the speed to 800r/min, adding a potassium methyl silicate alkaline catalyst, controlling the pH value of the mixture to be 8-10, reacting for 0.5h to prepare modified dispersoid 1, and coating the modified dispersoid on the composite layer obtained in the step S2 to obtain the heat-preserving moisture-preserving curing film.
Example 2
This example produced a thermal and moisture curing film, which was different from example 2 in that calcium carbonate was used in place of montmorillonite in example 1, with the remaining conditions being the same.
Example 3
This example produced a thermal and moisture curing film, which was different from example 2 in that the montmorillonite of example 1 was replaced with chlorite, and the remaining conditions were the same.
Example 4
This example produced a thermal and moisture curing film, which was different from example 2 in that the montmorillonite of example 1 was replaced with mica, and the remaining conditions were the same.
Comparative example 1
The comparative example prepared a heat-preserving moisture-preserving curing film: in comparison with example 1, the preparation method of this comparative example does not include the hydrophilic layer of example 1, and the rest of the procedure is the same as in example 1.
Comparative example 2
The comparative example prepared a heat-preserving moisture-preserving curing film: in comparison with example 1, the preparation method described in this comparative example does not include the hydrophobic layer in example 1, and the rest of the procedure is the same as in example 1.
Comparative example 3
The comparative example prepared a heat-preserving moisture-preserving curing film: in comparison with example 1, the preparation method described in this comparative example does not include montmorillonite in example 1, and the rest of the procedure is the same as in example 1.
Test example 1
After the same batch of concrete was formed, the films of examples and comparative examples were covered on the surface of the concrete in an outdoor environment where the outdoor average air temperature was not lower than-10 ℃, and after the same curing treatment and the evaluation of the recycling effect for 5 days, the results of the following table 1 were obtained:
table 1 results of Performance test of the heat-and moisture-retaining curing films obtained in examples and comparative examples
As can be seen from table 1, the thermal insulation and moisture maintenance films prepared in examples 1 to 4 have an elastic structure with outer water repellency and inner water repellency, the mechanical properties of the thermal insulation and moisture maintenance films are improved, the porosity of the thermal insulation and moisture maintenance films is reduced, the moisture evaporation of concrete is effectively prevented, the thermal insulation and moisture maintenance effects of the thermal insulation and moisture maintenance films are improved, the hydrophilic layer in example 1 is not included in comparative example 1, so that swelling cannot occur after water absorption by the synergistic filler, the gas barrier property cannot be improved, the thermal insulation effect is reduced, the hydrophobic layer in example 1 is not included in comparative example 2, the mechanical properties of the thermal insulation and moisture maintenance films are reduced, the moisture retention properties of the thermal insulation and moisture maintenance films cannot be improved, the montmorillonite is not included in comparative example 3, swelling cannot occur after water absorption, the gas barrier property of the thermal insulation and moisture maintenance films cannot be improved, and the thermal insulation effect is reduced.
While the embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art. Furthermore, embodiments of the invention and features of the embodiments may be combined with each other without conflict.
Claims (10)
1. The heat-preservation and moisture-preservation maintenance film is characterized by comprising a substrate layer, a hydrophilic layer and a hydrophobic layer which are sequentially overlapped;
the preparation raw materials of the matrix layer comprise straw fibers;
the preparation raw materials of the hydrophilic layer comprise hydrophilic silane and filler;
the preparation raw materials of the hydrophobic layer comprise polyester elastomer and hydrophobic silane.
2. The curing membrane of claim 1, wherein the straw fibers comprise fermented straw fibers.
3. The curing film of claim 1, wherein the hydrophobic silane comprises: at least one of n-octyltrimethoxysilane, isooctyltriethoxysilane and n-dodecyltrimethoxysilane.
4. The curing membrane of claim 1, wherein the hydrophilic silane comprises: at least one of gamma-glycidoxypropyl trimethoxysilane and beta- (3, 4-epoxycyclohexyl) -ethyl triethoxysilane.
5. The curing membrane of claim 1, wherein the filler comprises at least one of montmorillonite, mica, talc, hydrotalcite-like, glass microspheres, quartz, chlorite, calcium carbonate, feldspar, olivine, garnet, and andalusite.
6. The method for producing a curing film according to any one of claims 1 to 5, characterized in that the method comprises the steps of:
s1: the hydrophilic silane is hydrolyzed to obtain a hydrophilic silane hydrolysis product, and the hydrophilic silane hydrolysis product is coated on the surface of the matrix layer to obtain a composite layer;
s2: mixing the polyester elastomer and the hydrophobic silane to react to obtain modified dispersion 1;
s3: mixing the modified dispersion 1 obtained in the step S2 with the composite layer obtained in the step S1.
7. The method according to claim 6, wherein the mass ratio of the polyester elastomer to the hydrophobic silane in step S2 is 1: (0.05-0.1).
8. The method according to claim 7, wherein in the step S2, the mixing time is 0.5 to 1h.
9. The method of claim 6, wherein the mass ratio of the modified dispersion to the hydrophilic silane hydrolysis product is 1: (0.075-0.125).
10. Use of a curing membrane according to any one of claims 1-5 in the field of concrete curing.
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