CN116693236B - Energy-saving environment-friendly floating bead fireproof air duct board and preparation method thereof - Google Patents

Energy-saving environment-friendly floating bead fireproof air duct board and preparation method thereof Download PDF

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CN116693236B
CN116693236B CN202310936862.4A CN202310936862A CN116693236B CN 116693236 B CN116693236 B CN 116693236B CN 202310936862 A CN202310936862 A CN 202310936862A CN 116693236 B CN116693236 B CN 116693236B
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stirring
water
parts
drying
energy
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CN116693236A (en
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董长占
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Shandong Universal Air Conditioning Equipment Co ltd
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Shandong Universal Air Conditioning Equipment Co ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
    • F16L59/028—Composition or method of fixing a thermally insulating material
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    • 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
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    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/04—Silica-rich materials; Silicates
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    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
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    • C04B41/60—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone
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    • 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
    • C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
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    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
    • F16L57/04—Protection of pipes or objects of similar shape against external or internal damage or wear against fire or other external sources of extreme heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
    • F16L57/06—Protection of pipes or objects of similar shape against external or internal damage or wear against wear
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
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Abstract

The invention discloses an energy-saving environment-friendly floating bead fireproof air duct board and a preparation method thereof. The preparation method of the energy-saving environment-friendly floating bead fireproof air duct board comprises the following steps of: mixing modified floating beads, mesoporous Kong Tuobei mullite, inorganic silicon crystals, quartz sand, reinforcing fibers, polymer nano particles, a green heat-preserving mixture and a foaming agent, adding water, stirring, dehydrating, performing pressure forming treatment, curing, sterilizing at high pressure, naturally cooling and air-drying to obtain a composite board; and (2) mixing the quaternary ammonium salt monomer, benzyl acrylate, polyethylene glycol methyl ether acrylate and 2, 2-diethoxyacetophenone, stirring to obtain a mixture, coating the mixture on the surface of the composite board, irradiating with ultraviolet light, and aging to obtain the energy-saving environment-friendly floating bead fireproof air pipe board. The energy-saving environment-friendly floating bead fireproof air duct board prepared by the invention has excellent hydrophobic, fireproof, heat-insulating and mechanical properties.

Description

Energy-saving environment-friendly floating bead fireproof air duct board and preparation method thereof
Technical Field
The invention relates to the technical field of air pipes, in particular to an energy-saving environment-friendly floating bead fireproof air pipe plate and a preparation method thereof.
Background
The ventilating duct (air duct) is a duct system for air transportation and distribution, and in the technical specification JGJ141-2004 of ventilating duct construction, the air duct is divided into a galvanized steel sheet and a common steel sheet air duct, a stainless steel air duct, an aluminum sheet air duct, a phenolic aldehyde composite air duct and a polyurethane composite air duct, a glass fiber composite air duct, an inorganic glass fiber reinforced plastic air duct and a hard polyvinyl chloride air duct. Along with the gradual popularization of energy-saving buildings, the sealing performance and the heat-insulating and energy-saving effects of the buildings are increasingly improved, in order to improve the daily life and living comfort of people, the ventilation and air conditioning system is more important, the air quality inside the buildings is obviously improved under the condition of low energy consumption, the ventilation and air conditioning air pipes are reasonably designed, and proper material types are selected, so that the advantages can be enhanced, the ventilation is enhanced, the condensation is avoided, and the like.
For the existing steel and steel wooden air duct plates, the defects of heavier mass and increased load of the mounting hanging frame exist; part of the air pipes adopt rock wool, glass fiber, phenolic foam plastic and EPS molding polystyrene foam plastic as heat insulation layers, and harmful fibers and gas can be generated due to the fact that indoor sealing is more and more tight; the environment-friendly air duct plate prepared from algae, calcium-containing inorganic matrix, inorganic mineral powder and photocatalytic material has poor flame retardant property; the existing sound-absorbing and sound-insulating board is manufactured by slotting and punching through a density board, a PVC foaming board, a wooden multi-layer board and the like, and the engineering construction process of the board is complex.
Disclosure of Invention
The invention provides an energy-saving environment-friendly floating bead fireproof air duct board and a preparation method thereof, and aims to overcome the defect that the board in the prior art does not have flame retardance, water resistance, heat insulation, light weight and ecological performance.
The technical scheme for solving the technical problems is as follows: the preparation method of the energy-saving environment-friendly floating bead fireproof air duct board comprises the following steps of:
mixing 40-60 parts of modified floating beads, 20-40 parts of medium Kong Tuobei mullite, 10-20 parts of inorganic silicon crystal, 15-30 parts of quartz sand, 2-6 parts of reinforcing fibers, 1-5 parts of polymer nano particles, 4-12 parts of green heat preservation mixture and 1-3 parts of foaming agent, adding 380-700 parts of water, stirring, dewatering, pressure forming, curing, autoclaving, naturally cooling and air drying to obtain a composite board;
and (2) mixing 10-20 parts of quaternary ammonium salt monomer, 14-28 parts of benzyl acrylate, 0.6-1.2 parts of polyethylene glycol methyl ether acrylate and 0.06-0.12 part of 2, 2-diethoxyacetophenone, stirring to obtain a mixture, coating the mixture on the surface of a composite board, irradiating with ultraviolet light, and aging in air for 12-36 hours to obtain the energy-saving environment-friendly floating bead fireproof air pipe board.
In the process, double bonds in quaternary ammonium salt monomers, benzyl acrylate and polyethylene glycol methyl ether acrylate and double bonds on the surface of modified floating beads in the composite board are polymerized under the action of ultraviolet light to obtain a coating, and the coating is bonded and connected with the composite board.
Further, in the step (1), stirring treatment conditions are as follows: stirring at a rotation speed of 1000-1200r/min for 8-12min; the dehydration method comprises the following steps: pouring into a mould for dehydration; pressure forming treatment conditions: the pressure forming treatment pressure is 8-10MPa, and the pressure forming treatment time is 3-7min; the maintenance method comprises the following steps: curing for 5-7h under the condition that the temperature is room temperature and the humidity is 100%; autoclaving method: autoclaving at 180-200deg.C and 0.9-0.95MPa for 8-11 hr; air-drying conditions: the air drying temperature is 100-110 ℃ and the air drying time is 12-36h.
Further, in the step (2), the stirring treatment time is 0.5-1h; ultraviolet irradiation conditions: the ultraviolet wavelength is 365nm, the ultraviolet power is 8W, and the irradiation time is 1-3h.
Further, the preparation method of the modified floating beads comprises the following steps:
15-25kg of 3- (methacryloyloxy) propyl trimethoxysilane is added into 80-120L of 90wt% ethanol aqueous solution, then 0.1-1mol/L acetic acid aqueous solution is added, the mixture is stirred until the pH value is 3-5, then 5-15kg of floating beads are added, the mixture is stirred for 30-45min, the mixture is reacted for 1-3h at 40-60 ℃, the mixture is washed for 3-5 times by absolute ethanol, the residual solution is filtered out, and the mixture is dried for 12-24h at 40-50 ℃ to obtain the modified floating beads.
In the process, si-OH hydrolyzed by 3- (methacryloyloxy) propyl trimethoxy silane is bonded with hydroxyl on the surface of the floating bead to generate Si-O-Si bond, the Si-O-Si bond is grafted on the surface of the floating bead, and the grafted silane contains double bonds, so that the bonding with a subsequent hydrophobic coating is facilitated.
Further, the preparation method of the medium Kong Tuobei mullite comprises the following steps:
5-10kg of fly ash and 1.2-2.4kg of Ca (OH) 2 Adding into 100-200L of 0.5mol/L NaOH solution, reacting for 4-8h at 180-220 ℃, cooling to room temperature, filtering, washing for 3-5 times, and drying for 8-12h at 70-90 ℃ to obtain the medium Kong Tuobei mullite.
In the above process, the main component is CaO and SiO obtained by hydrothermal treatment 2 And Fe (Fe) 2 O 3 Is Kong Tuobei mullite.
Further, the reinforcing fiber is formed by compounding glass fiber, steel wire fiber and carbon fiber according to the weight ratio of (8-25): (10-28): (12-20).
Further, the polymer nanoparticles include nano ethyl cellulose.
Further, the preparation method of the nano ethyl cellulose comprises the following steps:
cutting 5-10kg of waste paper into small blocks of 50-150mm, soaking in 30-50L of 40wt% acetone, carrying out solvent exchange three times a day for three days, filtering, deinking with 50-100L of 0.5-1.5mol/L NaOH for 12-36h, adding 100-200L of water at 110-130 ℃ for neutralization, filtering, ball milling for 12-24h at a mass ratio of cellulose to balls of 1:20, and drying at 90-110 ℃ for 12-36h to obtain cellulose powder; adding 2.5-5kg of cellulose powder into 50-100L of 0.5-1.5mol/L NaOH, stirring at a rotating speed of 300-400r/min for 12-36h, filtering, refluxing with 30-50wt% of acetone, adding the cellulose powder and chloroethyl ester in a ratio of 1g to 10mL into ethyl chloride airflow, stirring at 50-70 ℃ for 4-8h, adding 8-12wt% of acetic acid for neutralization, filtering, washing with warm water for 3-5 times until the pH is neutral, filtering, and drying at 40-60 ℃ for 5-7h to obtain the nano ethyl cellulose.
In the above process, the alkalization and oxidation reaction in cellulose breaks the ester bond of lignin and hemicellulose connection, and simultaneously, the cellulose is alkalized into alkali cellulose, and ethyl donor is received in the ethyl chloride reflux process to obtain nano ethyl cellulose; the nano ethyl cellulose has good hydrophobicity, small particle size, improved material dispersibility, and enhanced mechanical properties and hydrophobicity of the plate.
Further, the green heat-preservation mixture is formed by compounding flame-retardant heat-insulation hydrophobic aerogel and green wheat straw aerogel according to the weight ratio of (1-2) to (1-3).
Further, the foaming agent comprises at least one of polyphenyl foam particles and polyurethane foam particles.
Further, the preparation method of the flame-retardant heat-insulating hydrophobic aerogel comprises the following steps:
adding 5-10kg of 6,6' - (propane-2, 2-diyl) bis (3-phenyl-3, 4-dihydro-2H-benzo [ E ] [1,3] oxazine) into 40-80kg of N, N-dimethylformamide, stirring at room temperature for 25-35min, adding 1.25-2.5kg of concentrated hydrochloric acid under ice bath condition, stirring for 40-80min, adding 0.05-0.1kg of 10- (2, 5-dihydroxyphenyl) -10-hydrogen-9-oxa-10-phosphaphenanthrene-10-oxide, and stirring for 25-35min to obtain a mixed solution; pouring the mixed solution into a mould, standing at 40-60 ℃ for 60-84 hours to obtain a solid, immersing the solid into ethanol for 60-84 hours, replacing the ethanol every 12 hours to remove N, N-dimethylformamide, and drying for 56-72 hours under normal temperature and normal pressure to obtain the composite aerogel; placing a beaker filled with 5-15mL of methyltrimethoxysilane and a beaker filled with 8-14mL of water in a closed reaction environment, placing composite aerogel between the two beakers, and standing at 40-60 ℃ for 8-12h to obtain the flame-retardant heat-insulating hydrophobic aerogel.
In the above process, 6' - (propane-2, 2-diyl) bis (3-phenyl-3, 4-dihydro-2H-benzo [ E ] [1,3] oxazine) intermolecular ring-opening cross-linking forms an N-C bond, while cross-grafting with 10- (2, 5-dihydroxyphenyl) -10-hydrogen-9-oxa-10-phosphaphenanthrene-10-oxide to form an N-C bond; methyl trimethoxy silane is deposited on the surface of aerogel, self-crosslinks to form Si-O-Si bonds, and reacts with hydroxyl groups on the surface of the aerogel to form Si-O-C bonds, so that a crosslinked network is formed, thorough hydrolysis-coagulation reaction with low surface energy is provided, and the obtained hydrophobicity is realized.
Further, the preparation method of the green wheat straw aerogel comprises the following steps:
mixing 4-8kg of wheat straw fiber with 100-200L of water, stirring for 5-15min, adding 8-16kg of NaOH, stirring for 1-3h at 80-100 ℃, and washing with water until the pH is neutral to obtain alkali-treated fiber; adding 100-200L of deionized water into alkali-treated fibers, adding 1-3mol/L of hydrochloric acid until the pH of the solution is 1.5-2.5, stirring at room temperature for 1-3h, washing with water until the pH is neutral, and drying at 50-70 ℃ for 10-20h to obtain dry fibers;
adding 1-2kg of dry fiber into 10-20L of water, adding 0.9-1.8kg of urea and 0.1-0.2kg of sodium dodecyl sulfate, stirring for 2-4h, adding 1-2L of water glass solution, stirring for 5-10min, adding 1-3mol/L HCl to pH of 8.5-9.5, drying at 50-70 ℃ until gelation, adding 2L of water, stirring at 60 ℃ until phase separation occurs, draining the top layer under the condition of not losing fiber aerogel phase, repeating for 3-4 times until clear water phase is observed, draining the top layer to obtain aerogel precursor;
adding the aerogel precursor into 1-3L of water, stirring for 30-50min to obtain a mixed solution, transferring the mixed solution into a papermaking device, taking out and storing the mixed solution between perforated stainless steel sheets after molding, and drying the mixed solution at 50-70 ℃ for 12-36h to obtain the green wheat straw aerogel.
In the process, hemicellulose and lignin in the wheat straw are removed through acid-base treatment, so that the heat preservation performance is improved; urea is decomposed into carbon dioxide and ammonia, acidity is generated in the hydrolysis process of water glass, and silica gel aerogel is formed in situ in the presence of cellulose fibers; the surfactant sodium dodecyl sulfate causes the formation of colloidal anisotropic micelle due to the dual nature of the mutual aggregation of hydrophobic groups and hydrophilic groups; the prepared green wheat straw aerogel has low density, high porosity and high compression modulus; the aerogel cellulose composite material has low density, high porosity and higher pore number in the free movement path of air molecules, and reduces the thermal conductivity of the aerogel cellulose composite material.
Further, the preparation method of the quaternary ammonium salt monomer comprises the following steps:
dissolving 10-20kg of lithium bistrifluoromethane sulfonyl imide in 20-40L of water at 60-80 ℃ in nitrogen atmosphere to obtain a solution, adding the solution into an acryloyloxyethyl trimethyl ammonium chloride solution which is stirred at a rotating speed of 1000-2000r/min, stirring for 1-3 hours at room temperature, decanting, removing a top water phase, washing the residual ionic liquid twice with water to remove unreacted substances and inorganic salts, and drying the viscous liquid in a rotary evaporator at 50-70 ℃ for 10-14 hours to obtain a quaternary ammonium salt monomer.
In the process, the acryloyloxyethyl trimethyl ammonium chloride and hydrophobic anion bis (trifluoromethyl sulfonyl) imine are subjected to silver ion exchange reaction to obtain the quaternary ammonium salt monomer.
The energy-saving and environment-friendly floating bead fireproof air duct board is prepared by adopting the preparation method of the energy-saving and environment-friendly floating bead fireproof air duct board.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, 3- (methacryloyloxy) propyl trimethoxy silane is used for modifying the floating beads to enable the surface of the plate to contain double bonds, then the plate is polymerized with quaternary ammonium salt monomers, benzyl acrylate and polyethylene glycol methyl ether acrylate under the ultraviolet light catalysis to obtain a hydrophobic coating, the quaternary ammonium salt monomers and the benzyl acrylate have hydrophobicity, and meanwhile, the added high polymer nano-particle nano-ethyl cellulose particles are small in particle and have hydrophobicity, so that the nano-ethyl cellulose particles can be uniformly mixed in the material, and the methyltrimethoxy silane deposited on the surface of the green heat-preservation mixture is matched with the hydrophobic coating and the nano-ethyl cellulose in a synergic manner to achieve synchronous hydrophobicity of the surface layer and the body;
2. the modified floating beads, the mesoporous Kong Tuobei mullite, the inorganic silicon crystal and the quartz sand added in the invention have fireproof flame retardance, and the green heat-preservation mixture contains phosphorus groups, so that the structure is unstable, the decomposition is quick, water in the air is captured, acid is generated, the dehydration and carbonization of a matrix are promoted in the process, the carbon layer is formed on the surface of the matrix, the density of the carbon layer prevents the heat and the substance exchange between the inside and the surrounding environment of the polymer, the combustion is slowed down, the carbon residue rate of the polymer is improved, and the flame retardance of the polymer is improved. The hydrophobic coating contains benzene rings and N, S which have flame retardance, and the flame retardance of the energy-saving environment-friendly floating bead fireproof air duct board is improved in a synergistic manner; the nano ethyl cellulose is prepared from waste paper, and the green wheat straw aerogel in the green heat preservation mixture is prepared from wheat straw, so that the nano ethyl cellulose is environment-friendly;
3. the main component of the invention is CaO and SiO obtained by hydrothermal treatment 2 And Fe (Fe) 2 O 3 The medium Kong Tuobei mullite, the flame-retardant substance, the large aggregate of the medium Kong Tuobei mullite is composed of a large number of nano sheets and nano fibers to form a large number of pores, the porous structure has higher specific surface area and lighter weight relative to the volume, and the porous structure can improve the sound insulation performance.
4. According to the invention, the modified floating bead particles are fine, hollow, light, high-strength, wear-resistant, high-temperature-resistant, heat-insulating and light in texture, the medium Kong Tuobei mullite has a large number of pores, the aerogel in the green heat-insulating mixture is also a heat-insulating and light material, and the light energy-saving environment-friendly floating bead fireproof air duct board with light weight, low heat conductivity, good heat-insulating performance, good flame retardance and fireproof performance and excellent hydrophobicity is obtained by compounding the modified floating bead particles with inorganic silicon crystals, quartz sand, reinforcing fibers and high-molecular nano particles.
Drawings
FIG. 1 is a flow chart of a preparation process of the energy-saving environment-friendly floating bead fireproof air duct board.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below in connection with the embodiments of the present invention. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1, this example discloses a method for preparing modified floating beads, comprising the following steps:
20kg of 3- (methacryloyloxy) propyltrimethoxysilane was added to 100L of 90wt% aqueous ethanol, then 0.55mol/L aqueous acetic acid was added, stirred to a pH of 4, then 10kg of floating beads were added, stirred for 38min, reacted at 50℃for 2h, washed with absolute ethanol for 4 times, the remaining solution was filtered off, and dried at 45℃for 18h to give modified floating beads.
Example 2, this example discloses a method for preparing mesoporous Kong Tuobei mullite, comprising the steps of:
7.5kg of fly ash and 1.8kg of Ca (OH) are mixed 2 150L of 0.5mol/L NaOH solution is added to react for 6 hours at 200 ℃, cooled to room temperature, filtered, washed 4 times and dried for 10 hours at 80 ℃ to obtain the mesoporous Kong Tuobei mullite.
Example 3, this example discloses a method for preparing nano ethyl cellulose, comprising the following steps:
cutting 7.5kg of waste paper into small blocks of 100mm, soaking in 40L of 40wt% acetone, carrying out solvent exchange three times a day for three days, filtering, deinking for 24 hours by 75L of 1mol/L NaOH, adding 150L of water at 120 ℃ for neutralization, filtering, ball milling for 18 hours at a mass ratio of cellulose to balls of 1:20, and drying at 100 ℃ for 24 hours to obtain cellulose powder; adding 3.75kg of cellulose powder into 75L of 1mol/L NaOH, stirring at a rotating speed of 350/min for 24 hours, filtering, refluxing with 40wt% of acetone, adding the mixture into ethyl chloride airflow at a ratio of the cellulose powder to the ethyl chloride of 1g to 10mL, stirring at 60 ℃ for 6 hours, adding 10wt% of acetic acid for neutralization, filtering, washing with warm water for 4 times until the pH is neutral, filtering, and drying at 50 ℃ for 6 hours to obtain the nano ethyl cellulose.
Example 4, this example discloses a method for preparing a flame retardant, heat insulating, hydrophobic aerogel, comprising the steps of:
7.5kg of 6,6' - (propane-2, 2-diyl) bis (3-phenyl-3, 4-dihydro-2H-benzo [ E ] [1,3] oxazine) was added to 60kg of N, N-dimethylformamide, stirred at room temperature for 30 minutes, then 2kg of concentrated hydrochloric acid was added under ice bath conditions and stirred for 60 minutes, and then 0.075kg of 10- (2, 5-dihydroxyphenyl) -10-hydrogen-9-oxa-10-phosphaphenanthrene-10-oxide was added, followed by stirring for 30 minutes to obtain a mixed solution; pouring the mixed solution into a mold, standing at 50 ℃ for 72 hours to obtain a solid, immersing the solid into ethanol for 72 hours, replacing the ethanol every 12 hours to remove N, N-dimethylformamide, and drying for 64 hours under normal temperature and normal pressure to obtain composite aerogel; placing a beaker filled with 10mL of methyltrimethoxysilane and a beaker filled with 11mL of water in a closed reaction environment, placing the composite aerogel between the two beakers, and standing for 10 hours at 50 ℃ to obtain the flame-retardant heat-insulating hydrophobic aerogel.
Example 5, this example discloses a method for preparing green wheat straw aerogel, comprising the steps of:
mixing 6kg of wheat straw fibers with 150L of water, stirring for 10min, adding 12kg of NaOH, stirring at 90 ℃ for 2h, and washing with water until the pH is neutral to obtain alkali-treated fibers; adding 150L of deionized water into the alkali-treated fiber, adding 2mol/L of hydrochloric acid until the pH of the solution is 2, stirring at room temperature for 2 hours, washing with water until the pH is neutral, and drying at 60 ℃ for 15 hours to obtain a dry fiber;
adding 1.5kg of dry fiber into 15L of water, adding 1.3kg of urea and 0.15kg of sodium dodecyl sulfate, stirring for 3 hours, adding 1.5L of water glass solution, stirring for 7.5 minutes, adding 2mol/L of HCl to pH 9, drying at 60 ℃ until gelation, adding 2L of water, stirring at 60 ℃ until phase separation occurs, draining the top layer under the condition of not losing the fiber aerogel phase, repeating for 4 times until a clear water phase is observed, draining the top layer, and obtaining an aerogel precursor;
adding the aerogel precursor into 2L of water, stirring for 40min to obtain a mixed solution, transferring the mixed solution into a papermaking device, taking out and storing the mixed solution between perforated stainless steel sheets after molding, and drying at 60 ℃ for 24h to obtain the green wheat straw aerogel.
Example 6, this example discloses a preparation method of quaternary ammonium salt monomer, comprising the following steps:
15kg of lithium bistrifluoromethane sulphonimide was dissolved in 30L of water under nitrogen atmosphere at 70℃to give a solution, the solution was added to an acryloyloxyethyl trimethyl ammonium chloride solution treated with stirring at 1500r/min, stirred at room temperature for 2h, after decantation, the top aqueous phase was removed and the remaining ionic liquid was washed twice with water to remove unreacted material and inorganic salts, and the viscous liquid was dried in a rotary evaporator at 60℃for 12h to give a quaternary ammonium salt monomer.
Embodiment 7, this embodiment discloses a preparation method of energy-saving environment-friendly floating bead fireproof air duct board, comprising the following steps:
mixing 50 parts of modified floating beads, 30 parts of medium Kong Tuobei mullite, 15 parts of inorganic silicon crystal, 24 parts of quartz sand, 4 parts of reinforcing fibers, 3 parts of polymer nano particles, 8 parts of green heat preservation mixture and 2 parts of foaming agent, adding 550 parts of water, stirring at a rotating speed of 1100r/min for 10min, pouring into a mould for dehydration, performing pressure forming treatment at 9MPa for 5min, curing at room temperature and humidity of 100% for 6h, performing high-pressure sterilization at 190 ℃ for 9h at a pressure of 0.93MPa, naturally cooling, and performing air drying at 105 ℃ for 24h to obtain a composite board;
and (2) mixing 15 parts of quaternary ammonium salt monomer, 21 parts of benzyl acrylate, 0.9 part of polyethylene glycol methyl ether acrylate and 0.09 part of 2, 2-diethoxyacetophenone, stirring for 0.7h to obtain a mixture, coating the mixture on the surface of a composite board, irradiating with ultraviolet light for 2h under the conditions of 365nm wavelength and 8W power, and aging in air for 24h to obtain the energy-saving environment-friendly floating bead fireproof air pipe board.
Embodiment 8, this embodiment disclose a energy-concerving and environment-protective floating bead fire prevention tuber pipe panel's preparation method, including the following step:
mixing 40 parts of modified floating beads, 20 parts of medium Kong Tuobei mullite, 20 parts of inorganic silicon crystal, 15 parts of quartz sand, 2 parts of reinforcing fibers, 5 parts of polymer nano particles, 4 parts of green heat preservation mixture and 1 part of foaming agent, adding 380 parts of water, stirring at a rotating speed of 1000r/min for 8min, pouring into a mould for dehydration, performing pressure forming treatment at 8MPa for 7min, curing at room temperature and humidity of 100% for 5h, performing high-pressure sterilization at 180 ℃ for 8h at a pressure of 0.9MPa, naturally cooling, and performing air drying at 100 ℃ for 12h to obtain a composite board;
mixing 10 parts of quaternary ammonium salt monomer, 28 parts of benzyl acrylate, 0.6 part of polyethylene glycol methyl ether acrylate and 0.06 part of 2, 2-diethoxyacetophenone, stirring for 0.5h to obtain a mixture, coating the mixture on the surface of a composite board, irradiating with ultraviolet light for 1h under the conditions of 365nm wavelength and 8W power, and aging in air for 36h to obtain the energy-saving environment-friendly floating bead fireproof air pipe board.
Embodiment 9, this embodiment disclose a preparation method of energy-concerving and environment-protective floating bead fire prevention tuber pipe panel, including the following steps:
mixing 60 parts of modified floating beads, 40 parts of medium Kong Tuobei mullite, 10 parts of inorganic silicon crystal, 30 parts of quartz sand, 6 parts of reinforcing fiber, 1 part of polymer nano particles, 12 parts of green heat preservation mixture and 3 parts of foaming agent, adding 700 parts of water, stirring at a rotating speed of 1200r/min for 12min, pouring into a mould for dehydration, performing pressure forming treatment at 10MPa for 3min, curing at room temperature and humidity of 100% for 7h, performing high-pressure sterilization at 200 ℃ for 11h at a pressure of 0.95MPa, naturally cooling, and performing air drying at 110 ℃ for 36h to obtain a composite board;
and (2) mixing 20 parts of quaternary ammonium salt monomer, 14 parts of benzyl acrylate, 1.2 parts of polyethylene glycol methyl ether acrylate and 0.12 part of 2, 2-diethoxyacetophenone, stirring for 1h to obtain a mixture, coating the mixture on the surface of a composite board, irradiating with ultraviolet light for 3h under the conditions of 365nm wavelength and 8W power, and aging in air for 12h to obtain the energy-saving environment-friendly floating bead fireproof air pipe board.
Comparative example 1
Comparative example 1 in comparison with example 7, no intermediate Kong Tuobei mullite was added in step (1) of comparative example 1, and the other conditions were unchanged.
Comparative example 2
Comparative example 2 the unmodified beads of step (1) of comparative example 2 were compared to example 7, and the other conditions were unchanged.
Comparative example 3
Comparative example 3 in comparison with example 7, the polymer nanoparticles were not added in step (1) of comparative example 3, and the other conditions were not changed.
Comparative example 4
Comparative example 4 in comparison with example 7, the green incubation mixture was not added in step (1) of comparative example 4, and the other conditions were unchanged.
Comparative example 5
Comparative example 5 in comparison with example 7, comparative example 5 did not have step (2), i.e., the composite board obtained without step (1) was the final product, and the other conditions were unchanged.
Experimental example
The performance of the energy-saving and environment-friendly floating bead fireproof air duct plates prepared in examples 7-9 and comparative examples 1-5 was tested by an industry standard method, and the test results are shown in the following table:
TABLE 1
As can be seen from the data in table 1, the energy-saving and environment-friendly floating bead fireproof air duct boards prepared in examples 7 to 9 have good mechanical properties, heat preservation effect, hydrophobic properties and fireproof properties, while the energy-saving and environment-friendly floating bead fireproof air duct boards prepared in comparative examples 1 to 5 have lower properties, because the comparative example 1 is not added with the Kong Tuobei mullite, the mechanical properties, heat preservation effect, hydrophobic properties and fireproof properties of the energy-saving and environment-friendly floating bead fireproof air duct boards are poor; unmodified floating beads in comparative example 2 can not be bonded when the hydrophobic flame-retardant coating is finally coated, and the coating effect is poor, so that the mechanical property, the heat preservation effect, the hydrophobic property and the fireproof performance of the energy-saving environment-friendly floating bead fireproof air duct board are poor; the comparative example 3 is not added with polymer nano particles, so that the mechanical property, the heat preservation effect, the hydrophobic property and the fireproof property of the energy-saving environment-friendly floating bead fireproof air duct board are poor; the comparative example 4 is not added with a green heat-preserving mixture, so that the mechanical property, heat-preserving effect, hydrophobic property and fireproof property of the energy-saving environment-friendly floating bead fireproof air duct board are poor; the comparative example 5 is not coated with the flame-retardant hydrophobic coating, so that the mechanical property, the heat preservation effect, the hydrophobic property and the fireproof property of the energy-saving environment-friendly floating bead fireproof air duct board are poor.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (4)

1. The preparation method of the energy-saving environment-friendly floating bead fireproof air duct board is characterized by comprising the following steps of:
mixing 40-60 parts of modified floating beads, 20-40 parts of medium Kong Tuobei mullite, 10-20 parts of inorganic silicon crystal, 15-30 parts of quartz sand, 2-6 parts of reinforcing fibers, 1-5 parts of polymer nano particles, 4-12 parts of green heat preservation mixture and 1-3 parts of foaming agent, adding 380-700 parts of water, stirring, dewatering, pressure forming, curing, autoclaving, naturally cooling and air drying to obtain a composite board;
step (2) mixing 10-20 parts of quaternary ammonium salt monomer, 14-28 parts of benzyl acrylate and 0.6-1.2 parts of polyethylene glycol methyl ether acrylate and 0.06-0.12 part of 2, 2-diethoxyacetophenone, stirring to obtain a mixture, coating the mixture on the surface of a composite board, irradiating with ultraviolet light, and aging in air for 12-36 hours to obtain an energy-saving environment-friendly floating bead fireproof air pipe board;
the preparation method of the modified floating beads comprises the following steps:
adding 15-25kg of 3- (methacryloyloxy) propyl trimethoxysilane into 80-120L of 90wt% ethanol aqueous solution, adding 0.1-1mol/L acetic acid aqueous solution, stirring to pH value of 3-5, adding 5-15kg of floating beads, stirring for 30-45min, reacting at 40-60 ℃ for 1-3h, washing with absolute ethanol for 3-5 times, filtering out the residual solution, and drying at 40-50 ℃ for 12-24h to obtain modified floating beads;
the polymer nano-particles comprise nano ethyl cellulose; the preparation method of the nano ethyl cellulose comprises the following steps:
cutting 5-10kg of waste paper into small blocks of 50-150mm, soaking in 30-50L of 40wt% acetone, carrying out solvent exchange three times a day for three days, filtering, deinking with 50-100L of 0.5-1.5mol/L NaOH for 12-36h, adding 100-200L of water at 110-130 ℃ for neutralization, filtering, ball milling for 12-24h at a mass ratio of cellulose to balls of 1:20, and drying at 90-110 ℃ for 12-36h to obtain cellulose powder; adding 2.5-5kg of cellulose powder into 50-100L of 0.5-1.5mol/L NaOH, stirring at a rotating speed of 300-400r/min for 12-36h, filtering, refluxing with 30-50wt% of acetone, adding the cellulose powder and chloroethyl ester in a ratio of 1g to 10mL into ethyl chloride airflow, stirring at 50-70 ℃ for 4-8h, adding 8-12wt% of acetic acid for neutralization, filtering, washing with warm water for 3-5 times until the pH is neutral, filtering, and drying at 40-60 ℃ for 5-7h to obtain nano ethyl cellulose;
the green heat-preservation mixture is formed by compounding flame-retardant heat-insulation hydrophobic aerogel and green wheat straw aerogel according to the weight ratio of (1-2) to (1-3);
the preparation method of the flame-retardant heat-insulating hydrophobic aerogel comprises the following steps:
adding 5-10kg of 6,6' - (propane-2, 2-diyl) bis (3-phenyl-3, 4-dihydro-2H-benzo [ E ] [1,3] oxazine) into 40-80kg of N, N-dimethylformamide, stirring at room temperature for 25-35min, adding 1.25-2.5kg of concentrated hydrochloric acid under ice bath condition, stirring for 40-80min, adding 0.05-0.1kg of 10- (2, 5-dihydroxyphenyl) -10-hydrogen-9-oxa-10-phosphaphenanthrene-10-oxide, and stirring for 25-35min to obtain a mixed solution; pouring the mixed solution into a mould, standing at 40-60 ℃ for 60-84 hours to obtain a solid, immersing the solid into ethanol for 60-84 hours, replacing the ethanol every 12 hours to remove N, N-dimethylformamide, and drying for 56-72 hours under normal temperature and normal pressure to obtain the composite aerogel; placing a beaker filled with 5-15mL of methyltrimethoxysilane and a beaker filled with 8-14mL of water in a closed reaction environment, placing composite aerogel between the two beakers, and standing at 40-60 ℃ for 8-12h to obtain flame-retardant heat-insulating hydrophobic aerogel;
the preparation method of the green wheat straw aerogel comprises the following steps:
mixing 4-8kg of wheat straw fiber with 100-200L of water, stirring for 5-15min, adding 8-16kg of NaOH, stirring for 1-3h at 80-100 ℃, and washing with water until the pH is neutral to obtain alkali-treated fiber; adding 100-200L of deionized water into alkali-treated fibers, adding 1-3mol/L of hydrochloric acid until the pH of the solution is 1.5-2.5, stirring at room temperature for 1-3h, washing with water until the pH is neutral, and drying at 50-70 ℃ for 10-20h to obtain dry fibers;
adding 1-2kg of dry fiber into 10-20L of water, adding 0.9-1.8kg of urea and 0.1-0.2kg of sodium dodecyl sulfate, stirring for 2-4h, adding 1-2L of water glass solution, stirring for 5-10min, adding 1-3mol/L HCl to pH of 8.5-9.5, drying at 50-70 ℃ until gelation, adding 2L of water, stirring at 60 ℃ until phase separation occurs, draining the top layer under the condition of not losing fiber aerogel phase, repeating for 3-4 times until clear water phase is observed, draining the top layer to obtain aerogel precursor;
adding the aerogel precursor into 1-3L of water, stirring for 30-50min to obtain a mixed solution, transferring the mixed solution into a papermaking device, taking out and storing the mixed solution between perforated stainless steel sheets after molding, and drying for 12-36h at 50-70 ℃ to obtain green wheat straw aerogel;
the preparation method of the medium Kong Tuobei mullite comprises the following steps:
5-10kg of fly ash and 1.2-2.4kg of Ca (OH) 2 Adding into 100-200L of 0.5mol/L NaOH solution, reacting for 4-8h at 180-220 ℃, cooling to room temperature, filtering, washing for 3-5 times, and drying for 8-12h at 70-90 ℃ to obtain the medium Kong Tuobei mullite;
the preparation method of the quaternary ammonium salt monomer comprises the following steps:
dissolving 10-20kg of lithium bistrifluoromethane sulfonyl imide in 20-40L of water at 60-80 ℃ in nitrogen atmosphere to obtain a solution, adding the solution into an acryloyloxyethyl trimethyl ammonium chloride solution which is stirred at a rotating speed of 1000-2000r/min, stirring for 1-3 hours at room temperature, decanting, removing a top water phase, washing the residual ionic liquid twice with water to remove unreacted substances and inorganic salts, and drying the viscous liquid in a rotary evaporator at 50-70 ℃ for 10-14 hours to obtain a quaternary ammonium salt monomer.
2. The method for preparing the energy-saving and environment-friendly floating bead fireproof air duct board according to claim 1, wherein in the step (1), the pressure forming treatment condition is as follows: the pressure forming treatment pressure is 8-10MPa, and the pressure forming treatment time is 3-7min; the maintenance method comprises the following steps: curing for 5-7h under the condition that the temperature is room temperature and the humidity is 100%; autoclaving method: autoclaving at 180-200deg.C and 0.9-0.95MPa for 8-11 hr; air-drying conditions: the air drying temperature is 100-110 ℃ and the air drying time is 12-36h; ultraviolet irradiation conditions: the ultraviolet wavelength is 365nm, the ultraviolet power is 8W, and the irradiation time is 1-3h.
3. The preparation method of the energy-saving and environment-friendly floating bead fireproof air duct board as claimed in claim 1, wherein the reinforcing fiber is formed by compounding glass fiber, steel wire fiber and carbon fiber according to the weight ratio of (8-25): 10-28): 12-20; the foaming agent comprises at least one of polyphenyl foam particles and polyurethane foam particles.
4. An energy-saving and environment-friendly floating bead fireproof air duct board prepared by adopting the method as claimed in any one of claims 1-3.
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CN102230740A (en) * 2011-06-06 2011-11-02 浙江大学 High siliceous structure and thermal insulation integrated composite brick and preparation method
CN102515829A (en) * 2011-12-23 2012-06-27 北京化工大学 Inorganic foaming heat-insulation material and preparation method thereof
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