CN112979270B - Photocatalytic glass fiber cotton dry-process hot-pressing composite core material and preparation method thereof - Google Patents
Photocatalytic glass fiber cotton dry-process hot-pressing composite core material and preparation method thereof Download PDFInfo
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- 239000003365 glass fiber Substances 0.000 title claims abstract description 80
- 229920000742 Cotton Polymers 0.000 title claims abstract description 73
- 230000001699 photocatalysis Effects 0.000 title claims abstract description 65
- 239000002131 composite material Substances 0.000 title claims abstract description 54
- 239000011162 core material Substances 0.000 title claims abstract description 36
- 238000007731 hot pressing Methods 0.000 title claims abstract description 30
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 238000001035 drying Methods 0.000 title description 5
- 239000002105 nanoparticle Substances 0.000 claims abstract description 41
- 239000000835 fiber Substances 0.000 claims abstract description 23
- 239000007788 liquid Substances 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 16
- 239000006185 dispersion Substances 0.000 claims abstract description 15
- 238000005507 spraying Methods 0.000 claims abstract description 13
- 239000007822 coupling agent Substances 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000009210 therapy by ultrasound Methods 0.000 claims abstract description 5
- 239000011521 glass Substances 0.000 claims description 11
- 239000002245 particle Substances 0.000 claims description 11
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 229910021389 graphene Inorganic materials 0.000 claims description 6
- 238000007598 dipping method Methods 0.000 claims description 5
- 239000005357 flat glass Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 239000002893 slag Substances 0.000 claims description 5
- 239000002699 waste material Substances 0.000 claims description 5
- 239000011787 zinc oxide Substances 0.000 claims description 5
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 3
- 229910021532 Calcite Inorganic materials 0.000 claims description 2
- 239000006004 Quartz sand Substances 0.000 claims description 2
- 238000003723 Smelting Methods 0.000 claims description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 2
- 229910052656 albite Inorganic materials 0.000 claims description 2
- DLHONNLASJQAHX-UHFFFAOYSA-N aluminum;potassium;oxygen(2-);silicon(4+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Al+3].[Si+4].[Si+4].[Si+4].[K+] DLHONNLASJQAHX-UHFFFAOYSA-N 0.000 claims description 2
- 238000000889 atomisation Methods 0.000 claims description 2
- AYJRCSIUFZENHW-DEQYMQKBSA-L barium(2+);oxomethanediolate Chemical compound [Ba+2].[O-][14C]([O-])=O AYJRCSIUFZENHW-DEQYMQKBSA-L 0.000 claims description 2
- 229910021538 borax Inorganic materials 0.000 claims description 2
- 229910000514 dolomite Inorganic materials 0.000 claims description 2
- 239000010459 dolomite Substances 0.000 claims description 2
- 239000012535 impurity Substances 0.000 claims description 2
- QGLKJKCYBOYXKC-UHFFFAOYSA-N nonaoxidotritungsten Chemical compound O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 QGLKJKCYBOYXKC-UHFFFAOYSA-N 0.000 claims description 2
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 2
- 235000017550 sodium carbonate Nutrition 0.000 claims description 2
- 239000004328 sodium tetraborate Substances 0.000 claims description 2
- 235000010339 sodium tetraborate Nutrition 0.000 claims description 2
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 2
- 229910001930 tungsten oxide Inorganic materials 0.000 claims description 2
- 238000002791 soaking Methods 0.000 abstract description 8
- 239000011148 porous material Substances 0.000 abstract description 5
- 230000001954 sterilising effect Effects 0.000 abstract description 5
- 238000004659 sterilization and disinfection Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 238000011065 in-situ storage Methods 0.000 abstract description 4
- 239000002994 raw material Substances 0.000 description 10
- 238000007146 photocatalysis Methods 0.000 description 7
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 238000009413 insulation Methods 0.000 description 5
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- 229910052593 corundum Inorganic materials 0.000 description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 229910001845 yogo sapphire Inorganic materials 0.000 description 4
- 229910052681 coesite Inorganic materials 0.000 description 3
- 229910052906 cristobalite Inorganic materials 0.000 description 3
- 238000013033 photocatalytic degradation reaction Methods 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 229910052682 stishovite Inorganic materials 0.000 description 3
- 229910052905 tridymite Inorganic materials 0.000 description 3
- 239000006087 Silane Coupling Agent Substances 0.000 description 2
- 241000700605 Viruses Species 0.000 description 2
- 230000000844 anti-bacterial effect Effects 0.000 description 2
- IJOOHPMOJXWVHK-UHFFFAOYSA-N chlorotrimethylsilane Chemical compound C[Si](C)(C)Cl IJOOHPMOJXWVHK-UHFFFAOYSA-N 0.000 description 2
- PYWVYCXTNDRMGF-UHFFFAOYSA-N rhodamine B Chemical compound [Cl-].C=12C=CC(=[N+](CC)CC)C=C2OC2=CC(N(CC)CC)=CC=C2C=1C1=CC=CC=C1C(O)=O PYWVYCXTNDRMGF-UHFFFAOYSA-N 0.000 description 2
- 229940043267 rhodamine b Drugs 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003115 biocidal effect Effects 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 230000002458 infectious effect Effects 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011941 photocatalyst Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000005051 trimethylchlorosilane Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B30/00—Compositions for artificial stone, not containing binders
- C04B30/02—Compositions for artificial stone, not containing binders containing fibrous materials
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C1/00—Ingredients generally applicable to manufacture of glasses, glazes, or vitreous enamels
- C03C1/002—Use of waste materials, e.g. slags
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C13/00—Fibre or filament compositions
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/089—Glass compositions containing silica with 40% to 90% silica, by weight containing boron
- C03C3/091—Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
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Abstract
The invention relates to a photocatalytic glass fiber cotton dry-method hot-pressing composite core material, which comprises superfine glass fiber cotton, photocatalytic nano particles and a coupling agent, and the preparation method of the composite core material comprises the following steps: firstly, uniformly atomizing and spraying a dispersion liquid mixed with photocatalytic nano particles A and a coupling agent on the surface of each superfine glass fiber to prepare cellucotton; then soaking the cellucotton in the ionic water dispersion liquid of the photocatalytic nano-particles B for ultrasonic treatment and soaking; and finally, carrying out hot pressing on the impregnated fiber cotton to obtain the photocatalytic glass fiber cotton dry-method hot-pressing composite core material. The invention can ensure that the photocatalytic nano particles are bonded and grown on the surface of each fiber in situ, and further introduces a multi-stage nano pore structure into the three-dimensional fiber mesh structure, thereby effectively improving the porosity of the composite glass fiber cotton and the load capacity of the photocatalytic nano particles, and further reducing the low thermal conductivity coefficient of the composite core material while having the photocatalytic sterilization effect.
Description
Technical Field
The invention relates to a photocatalytic glass fiber cotton dry hot-pressing composite core material and a preparation method thereof, belonging to the technical field of glass fiber cotton dry hot-pressing core materials.
Background
The heat insulation core material prepared from the superfine glass fiber cotton is a fibrous floccule heat insulation material with excellent performance, has the advantages of heat insulation, sound absorption, light weight, A-level non-combustibility, chemical corrosion resistance, environment-friendly material, rich raw material sources and the like, and is widely applied to heat insulation in the fields of building wall heat insulation, cold chain logistics, vehicles and the like. Because the infectious viruses are imported into the foreign viruses through the cold chain foreign ordinary logistics, the development of the high-performance glass fiber heat-insulating core material not only needs to have a very low heat conductivity coefficient, but also needs to have a composite function of antibiosis and sterilization, and is very important for containers applied to the cold chain logistics.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a hot-pressing composite core material prepared by a dry method of photocatalytic glass fiber cotton and a preparation method thereof, so as to solve the problems that the heat-insulating core material prepared by superfine glass fiber cotton in the prior art is not low enough in heat conductivity coefficient, poor in heat-insulating effect and does not have an antibacterial and bactericidal function at the same time.
In order to achieve the purpose, the invention adopts the following technical scheme: a photocatalysis glass fiber cotton dry-method hot-pressing composite core material comprises the following components in percentage by mass: 84.5-95 wt% of superfine glass fiber cotton, 5-15 wt% of photocatalytic nanoparticles and 0.5-2.5 wt% of a coupling agent, wherein the photocatalytic nanoparticles comprise photocatalytic nanoparticles A and photocatalytic nanoparticles B.
Furthermore, the average fiber diameter of the superfine glass fiber cotton is 2-3.4 mu m, the length-diameter ratio of the fiber is controlled to be 500-3550, the porosity is more than or equal to 88%, and the tensile strength is more than or equal to 8N/cm2The slag ball content is less than or equal to 0.1 percent, and the heat conduction coefficient is less than or equal to 32 mW/(m.K).
Further, the photocatalytic nanoparticles A are one or more of zinc oxide, titanium oxide, zirconium dioxide or tungsten oxide, and the average particle diameter is 55-90 nm.
Further, the photocatalytic nanoparticles B are one or more of graphene, graphene oxide, reduced graphene oxide or graphene quantum dots, and the average particle diameter is 150-200 nm.
The preparation method of the photocatalytic glass fiber cotton dry-process hot-pressing composite core material comprises the following steps:
step 1, according to the composition of superfine glass fiber cotton in a dry hot pressing core material, selecting a proper amount of waste plate glass, quartz sand, soda ash, potassium feldspar, albite, calcite, borax, dolomite and barium carbonate, uniformly mixing and smelting the mixture into transparent glass liquid without impurities, then enabling the glass liquid to flow into a centrifugal disc rotating at a high speed to throw out superfine glass fibers, uniformly atomizing and spraying dispersion liquid mixed with photocatalytic nano particles A and a coupling agent onto the surface of each superfine glass fiber, and finally sucking the dispersion liquid into a cotton collector through negative pressure induced air to form composite superfine glass fiber cotton;
step 2, dipping the composite superfine glass fiber cotton obtained in the step 1 in 4mg/mL of ionic water dispersion of the photocatalytic nano-particles B, performing ultrasonic treatment for 5min, and repeating dipping for three times;
and 3, carrying out hot pressing on the composite superfine glass fiber cotton impregnated with the photocatalytic nano particles B in the step 2 in a dynamic hot press at the temperature of 600-680 ℃ for 3-10 min to obtain the photocatalytic glass fiber cotton dry-method hot-pressed composite core material.
Furthermore, in the step 1, the calcining temperature of the kiln is 1470 +/-10 ℃, and the temperature of the glass liquid flowing into the centrifugal disc is 985 +/-10 ℃.
Further, the rotating speed of the centrifugal machine in the step 1 is 2500-3800 rpm, and the yield of the superfine glass fiber cotton is controlled to be 300-455 Kg/h.
Further, the spraying pressure of the uniform atomization spraying in the step 1 is controlled to be 4-7.5 Mpa, and the spraying flow is controlled to be 300-355 Kg/h.
Further, in the step 1, the negative pressure induced air frequency is controlled to be 46-50 Hz, and the average lower speed of the composite superfine glass fiber cotton is controlled to be 15-23 m/s.
Compared with the prior art, the invention has the beneficial effects that:
the photocatalyst nano particles have good sterilization capability by utilizing a photocatalysis mechanism, and are tightly coated on the surface of the fiber by utilizing an in-situ bonding growth process of the nano particles, and a multi-stage pore structure is introduced into a fiber network, so that the porosity of the composite fiber core material is improved, the heat conductivity coefficient of the composite fiber core material is reduced, and the dry hot-pressing composite core material of the photocatalytic glass fiber cotton not only has sterilization effect, but also has excellent heat insulation performance.
The invention firstly sprays the dispersion liquid containing the photocatalysis nano-particle A and the coupling agent on the surface of each superfine glass fiber prepared by the centrifugal method to form the composite superfine glass fiber cotton, then the composite superfine glass fiber cotton is dipped in the dispersion liquid containing the photocatalysis nano-particle B and the coupling agent to ensure that the photocatalysis nano-particle is further uniformly distributed between the fiber surface and the fiber pore of the superfine glass fiber cotton, and finally, the composite glass fiber cotton and the photocatalysis nano-particle are organically combined together to form the composite core material by dry hot pressing in a hot press. According to the invention, the nano photocatalytic particles are dispersed and attached between the surfaces of the superfine glass fibers and fiber pores in an atomized spraying and dipping manner, so that the photocatalytic nanoparticles can be ensured to be bonded and grown on the surface of each fiber in situ, and a multi-stage nano pore structure is introduced into the three-dimensional fiber mesh structure, so that the porosity of the composite glass fiber cotton and the load capacity of the photocatalytic nanoparticles can be effectively improved, and finally, the prepared dry-method hot-pressing composite core material has a photocatalytic sterilization effect and is further reduced in the low thermal conductivity coefficient.
Description of the drawings:
FIG. 1 is a 2040-fold magnified microstructure diagram of a photocatalytic glass fiber cotton dry-process hot-pressing composite core material prepared in example 2.
Fig. 2 is a 50000 times microstructure of the multi-stage nanoporous structure of fig. 1 after in-situ bonding growth of the localized photocatalytic nanoparticles.
Detailed Description
The technical solution of the present invention is further described in detail by the following examples, which are illustrative but not limiting of the present invention.
The superfine glass fiber cotton adopted by the invention comprises the following components in percentage by mass: SiO 22： 62.5～68wt％，Na2O：11～16wt％，K2O：1～3.5wt％，CaO：2～4wt％，Al2O3： 4～8.5wt％，MgO：3～6.5wt％，B2O3：3～9wt％，Fe2O3+BaO：0.5～2.5wt％。
Example 1
The selected component is SiO2：63.5wt％，Na2O：12wt％，K2O：3wt％，CaO：3wt％， Al2O3：6wt％，MgO：6wt％，B2O3：5wt％，Fe2O3+ BaO: 1.5 wt% of waste flat glass and ore raw materials are used as raw materials, then the raw materials for preparing the superfine glass fiber are uniformly mixed and put into a kiln at 1470 ℃ to be melted into transparent and uniform glass liquid at high temperature, then the glass liquid which is uniformly melted flows into a centrifugal machine at 985 ℃, the rotating speed of the centrifugal machine is controlled at 3000rpm, and the yield of the superfine glass fiber cotton is controlled at 355 Kg/h. Mixing 1 wt% KH560 silane coupling agent and zinc oxide with average particle diameter of 75nmUniformly atomizing and spraying the dispersion liquid of the chemical nano particles on the surface of each superfine glass fiber prepared by a centrifugal method, wherein the injection pressure is controlled at 5Mpa, and the injection flow is controlled at 325 Kg/h; and then sucking the composite superfine glass fiber cotton into a cotton collector through negative pressure induced air frequency of 48Hz, and controlling the average lower speed of the composite superfine glass fiber cotton to be 20 m/s. And then soaking the prepared composite superfine glass fiber cotton in 4mg/mL of ionic water dispersion of photocatalytic nano-particle graphene with the average particle diameter of 160nm for 5min by ultrasonic treatment, and repeating the soaking for three times. Finally, the composite superfine glass fiber cotton impregnated with the photocatalytic nano particles is hot-pressed for 5min in a dynamic hot-pressing machine at the temperature of 630 ℃, the average fiber diameter of the superfine glass fiber cotton in the finally prepared composite core material of the photocatalytic glass fiber cotton in the dry hot-pressing process is 3 mu m, the fiber length-diameter ratio is 2500, the porosity is 94 percent, and the tensile strength is 10N/cm2The content of slag balls is less than or equal to 0.1 percent, and the photocatalytic degradation performance of the photocatalytic glass fiber cotton dry-process hot-pressed composite core material reaches 10mg/L rhodamine B solution which can degrade 96 percent in 30min under the condition of visible light; the thermal conductivity was 30 mW/(m.K).
Example 2
The selected component is SiO2：65wt％，Na2O：12wt％，K2O：2.5wt％，CaO：3wt％， Al2O3：5.5wt％，MgO：6wt％，B2O3：4.5wt％，Fe2O3+ BaO: 1.5 wt% of waste plate glass and ore raw materials are used as raw materials, then the raw materials for preparing the superfine glass fiber are uniformly mixed and put into a furnace at 1480 ℃ to be melted into transparent and uniform glass liquid, then the melted and uniform glass liquid flows into a centrifugal machine at 990 ℃, the rotating speed of the centrifugal machine is controlled at 3200rpm, and the yield of the superfine glass fiber cotton is controlled at 400 Kg/h. Uniformly atomizing and spraying a dispersion liquid mixed with a KH560 silane coupling agent with the content of 1.5 wt% and zinc oxide photocatalytic nanoparticles with the average particle diameter of 80nm onto the surface of each superfine glass fiber prepared by a centrifugal method, wherein the injection pressure is controlled at 6MPa, and the injection flow is controlled at 355 Kg/h; then the composite superfine glass fiber cotton is sucked into a cotton collector through the negative pressure induced air frequency of 49Hz to composite superfine glassThe average lower speed of the fiber cotton is controlled to be 22 m/s. And then soaking the prepared composite superfine glass fiber cotton in 4mg/mL of ionic water dispersion of photocatalytic nano-particle graphene with the average particle diameter of 160nm for 5min by ultrasonic treatment, and repeating the soaking for three times. Finally, the composite superfine glass fiber cotton impregnated with the photocatalytic nano particles is hot-pressed for 4min in a dynamic hot-pressing machine at the temperature of 650 ℃, the average fiber diameter of the superfine glass fiber cotton in the finally prepared photocatalytic glass fiber cotton dry hot-pressing composite core material is 2.8 mu m, the fiber length-diameter ratio is 3100, the porosity is 95 percent, and the tensile strength is 11N/cm2The content of the slag balls is less than or equal to 0.1 percent, and the photocatalytic degradation performance of the photocatalytic glass fiber cotton dry-method hot-pressed composite core material reaches 97 percent of 10mg/L rhodanmine B solution degraded in 30min under the condition of visible light; the thermal conductivity is 28 mW/(mK).
Example 3
The selected component is SiO2：67wt％，Na2O：10wt％，K2O：2wt％，CaO：3.5wt％， Al2O3：5.5wt％，MgO：6wt％，B2O3：5wt％，Fe2O3+ BaO: 1 wt% of waste flat glass and ore raw materials are used as raw materials, then the raw materials for preparing the superfine glass fiber are uniformly mixed and put into a furnace at 1480 ℃ to be melted into transparent and uniform glass liquid, then the melted and uniform glass liquid flows into a centrifugal machine at the temperature of 995 ℃, the rotating speed of the centrifugal machine is controlled at 3500rpm, and the yield of the superfine glass fiber cotton is controlled at 450 Kg/h. Uniformly atomizing and spraying a dispersion liquid mixed with 1.5 wt% of trimethylchlorosilane coupling agent and zinc oxide photocatalytic nanoparticles with the average particle diameter of 60nm onto the surface of each superfine glass fiber prepared by a centrifugal method, wherein the injection pressure is controlled to be 7Mpa, and the injection flow is controlled to be 355 Kg/h; and then sucking the composite superfine glass fiber cotton into a cotton collector through a negative pressure induced air frequency of 50Hz, and controlling the average lower speed of the composite superfine glass fiber cotton to be 23 m/s. And then soaking the prepared composite superfine glass fiber cotton in 4mg/mL of ionic water dispersion of photocatalytic nano-particle graphene with the average particle diameter of 150nm for 5min by ultrasonic waves, and repeating the soaking for three times. Finally, the impregnated photocatalytic nano particles are compoundedThe superfine glass fiber cotton is hot-pressed for 4min in a dynamic hot press at the temperature of 670 ℃, the average fiber diameter of the superfine glass fiber cotton in the finally prepared photocatalysis glass fiber cotton dry hot-pressing composite core material is 2.5 mu m, the fiber length-diameter ratio is 3500, the porosity is 97 percent, and the tensile strength is 12.5N/cm2The content of the slag balls is less than or equal to 0.1 percent, and the photocatalytic degradation performance of the photocatalytic glass fiber cotton dry-method hot-pressing composite core material can reach 97 percent of 10mg/L rhodamine B solution degraded in 25min under the condition of visible light; the thermal conductivity was 26.5 mW/(mK).
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (4)
1. The preparation method of the photocatalytic glass fiber cotton dry hot-pressing composite core material is characterized in that the dry hot-pressing composite core material comprises the following components in percentage by mass: 84.5-95 wt% of superfine glass fiber cotton, 5-15 wt% of photocatalytic nanoparticles and 0.5-2.5 wt% of coupling agent, wherein the photocatalytic nanoparticles comprise two types of photocatalytic nanoparticles A and photocatalytic nanoparticles B, the photocatalytic nanoparticles A are one or more of zinc oxide, titanium oxide, zirconium dioxide or tungsten oxide, the average particle diameter is 55-90 nm, the photocatalytic nanoparticles B are one or more of graphene oxide, reduced graphene oxide or graphene quantum dots, the average particle diameter is 150-200nm, and the preparation method of the photocatalytic glass fiber cotton dry-method hot-pressing composite core material comprises the following steps:
step 1, according to the composition of superfine glass fiber cotton in a dry hot pressing core material, selecting a proper amount of waste plate glass, quartz sand, soda ash, potassium feldspar, albite, calcite, borax, dolomite and barium carbonate, uniformly mixing and smelting the mixture into transparent glass liquid without impurities, then enabling the glass liquid to flow into a centrifugal disc rotating at a high speed to throw out superfine glass fibers, uniformly atomizing and spraying a dispersion liquid mixed with photocatalytic nanoparticles A and a coupling agent onto the surface of each superfine glass fiber, and finally sucking the mixture into a cotton collector through negative pressure induced air to form composite superfine glass fiber cotton;
step 2, dipping the composite superfine glass fiber cotton obtained in the step 1 in 4mg/mL of ionic water dispersion of the photocatalytic nano-particles B, performing ultrasonic treatment for 5min, and repeating dipping for three times;
and 3, carrying out hot pressing on the composite superfine glass fiber cotton impregnated with the photocatalytic nano particles B in the step 2 in a dynamic hot press at the temperature of 600-680 ℃ for 3-10 min to obtain the photocatalytic glass fiber cotton dry-method hot-pressed composite core material.
2. The preparation method of the photocatalytic glass fiber cotton dry hot-pressing composite core material as claimed in claim 1, wherein the average fiber diameter of the superfine glass fiber cotton is 2-3.4 μm, the length-diameter ratio of the fiber is controlled to be 500-3550, the porosity is not less than 88%, and the tensile strength is not less than 8N/cm2The slag ball content is less than or equal to 0.1 percent, and the heat conductivity coefficient is less than or equal to 32 mW/(m.K).
3. The preparation method of the photocatalytic glass fiber cotton dry hot-pressing composite core material as claimed in claim 1, wherein in the step 1, the rotation speed of a centrifugal disc is 2500-3800 rpm, and the yield of the superfine glass fiber cotton is controlled at 300-455 Kg/h.
4. The preparation method of the photocatalytic glass fiber cotton dry hot-pressing composite core material as claimed in claim 1, wherein the spraying pressure of the uniform atomization spraying in the step 1 is controlled to be 4-7.5 Mpa, and the spraying flow rate is controlled to be 300-355 Kg/h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110160902.1A CN112979270B (en) | 2021-02-05 | 2021-02-05 | Photocatalytic glass fiber cotton dry-process hot-pressing composite core material and preparation method thereof |
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| CN111268917A (en) * | 2019-11-19 | 2020-06-12 | 重庆文理学院 | Two-step primary nanopore dry-process composite vacuum heat-insulation core material and preparation method thereof |
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| CN107558289B (en) * | 2017-09-20 | 2019-01-11 | 宣汉正原微玻纤有限公司 | A kind of high intensity low thermal conductivity ultra-fine fibre glass cotton dry method hot pressing core material and preparation method thereof |
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| CN111268917A (en) * | 2019-11-19 | 2020-06-12 | 重庆文理学院 | Two-step primary nanopore dry-process composite vacuum heat-insulation core material and preparation method thereof |
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