CN116514576B - Gypsum board loaded with formaldehyde scavenger and preparation method thereof - Google Patents
Gypsum board loaded with formaldehyde scavenger and preparation method thereof Download PDFInfo
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- CN116514576B CN116514576B CN202310167487.1A CN202310167487A CN116514576B CN 116514576 B CN116514576 B CN 116514576B CN 202310167487 A CN202310167487 A CN 202310167487A CN 116514576 B CN116514576 B CN 116514576B
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- gypsum board
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- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 title claims abstract description 336
- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 128
- 239000010440 gypsum Substances 0.000 title claims abstract description 128
- 239000002516 radical scavenger Substances 0.000 title claims abstract description 93
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical class [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 87
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 claims abstract description 30
- 238000000746 purification Methods 0.000 claims abstract description 28
- 238000001035 drying Methods 0.000 claims abstract description 25
- 238000003756 stirring Methods 0.000 claims abstract description 25
- 230000000694 effects Effects 0.000 claims abstract description 18
- 238000002156 mixing Methods 0.000 claims abstract description 18
- 239000000203 mixture Substances 0.000 claims abstract description 18
- 239000012286 potassium permanganate Substances 0.000 claims abstract description 15
- 229910021380 Manganese Chloride Inorganic materials 0.000 claims abstract description 14
- GLFNIEUTAYBVOC-UHFFFAOYSA-L Manganese chloride Chemical compound Cl[Mn]Cl GLFNIEUTAYBVOC-UHFFFAOYSA-L 0.000 claims abstract description 14
- 239000011230 binding agent Substances 0.000 claims abstract description 14
- 235000002867 manganese chloride Nutrition 0.000 claims abstract description 14
- 239000011565 manganese chloride Substances 0.000 claims abstract description 14
- 239000011248 coating agent Substances 0.000 claims abstract description 12
- 238000000576 coating method Methods 0.000 claims abstract description 12
- 239000002904 solvent Substances 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 10
- 238000005406 washing Methods 0.000 claims abstract description 7
- SXGURHSLXPDJBC-UHFFFAOYSA-N n-(5-aminopyridin-2-yl)acetamide Chemical compound CC(=O)NC1=CC=C(N)C=N1 SXGURHSLXPDJBC-UHFFFAOYSA-N 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 229910052799 carbon Inorganic materials 0.000 claims description 14
- 239000012153 distilled water Substances 0.000 claims description 13
- 238000012360 testing method Methods 0.000 claims description 12
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 7
- 229920002401 polyacrylamide Polymers 0.000 claims description 7
- -1 2-acetamido-5-aminopyridine ethanol Chemical compound 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000002791 soaking Methods 0.000 claims description 4
- 239000012299 nitrogen atmosphere Substances 0.000 claims description 3
- 229920001807 Urea-formaldehyde Polymers 0.000 claims description 2
- 239000003822 epoxy resin Substances 0.000 claims description 2
- 238000011068 loading method Methods 0.000 claims description 2
- 229920000647 polyepoxide Polymers 0.000 claims description 2
- 239000004814 polyurethane Substances 0.000 claims description 2
- 229920002635 polyurethane Polymers 0.000 claims description 2
- 150000001299 aldehydes Chemical class 0.000 claims 3
- GZCGUPFRVQAUEE-SLPGGIOYSA-N aldehydo-D-glucose Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C=O GZCGUPFRVQAUEE-SLPGGIOYSA-N 0.000 claims 1
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 abstract description 13
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 abstract description 6
- 238000010276 construction Methods 0.000 abstract 1
- 230000002085 persistent effect Effects 0.000 abstract 1
- 239000004386 Erythritol Substances 0.000 description 9
- UNXHWFMMPAWVPI-UHFFFAOYSA-N Erythritol Natural products OCC(O)C(O)CO UNXHWFMMPAWVPI-UHFFFAOYSA-N 0.000 description 9
- UNXHWFMMPAWVPI-ZXZARUISSA-N erythritol Chemical compound OC[C@H](O)[C@H](O)CO UNXHWFMMPAWVPI-ZXZARUISSA-N 0.000 description 9
- 229940009714 erythritol Drugs 0.000 description 9
- 235000019414 erythritol Nutrition 0.000 description 9
- 239000000843 powder Substances 0.000 description 7
- 239000012629 purifying agent Substances 0.000 description 7
- 230000002045 lasting effect Effects 0.000 description 6
- 239000004566 building material Substances 0.000 description 4
- 238000005034 decoration Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 230000002776 aggregation Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229920000881 Modified starch Polymers 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 239000004088 foaming agent Substances 0.000 description 2
- 125000000524 functional group Chemical group 0.000 description 2
- 239000011941 photocatalyst Substances 0.000 description 2
- 239000012744 reinforcing agent Substances 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 239000004368 Modified starch Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000003905 indoor air pollution Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 235000019426 modified starch Nutrition 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000002688 persistence Effects 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 238000013033 photocatalytic degradation reaction Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
Classifications
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/60—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone
- C04B41/61—Coating or impregnation
- C04B41/65—Coating or impregnation with inorganic materials
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- 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
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5025—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with ceramic materials
- C04B41/5041—Titanium oxide or titanates
-
- 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
- C09D103/00—Coating compositions based on starch, amylose or amylopectin or on their derivatives or degradation products
- C09D103/02—Starch; Degradation products thereof, e.g. dextrin
-
- 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
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/24—Homopolymers or copolymers of amides or imides
- C09D133/26—Homopolymers or copolymers of acrylamide or methacrylamide
-
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
-
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
- E04C2/04—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres
- E04C2/043—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres of plaster
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F13/00—Coverings or linings, e.g. for walls or ceilings
- E04F13/07—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor
- E04F13/08—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements
- E04F13/14—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements stone or stone-like materials, e.g. ceramics concrete; of glass or with an outer layer of stone or stone-like materials or glass
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2262—Oxides; Hydroxides of metals of manganese
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Inorganic Chemistry (AREA)
- Civil Engineering (AREA)
- Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention discloses a gypsum board loaded with an aldehyde scavenger and a preparation method thereof; belongs to the field of construction; the method comprises the following steps: adding modified activated carbon into potassium permanganate solution, adding into manganese dichloride solution, stirring uniformly, washing, centrifuging, and drying to obtain modified activated carbon loaded on manganese dioxide, namely an aldehyde scavenger; and uniformly stirring and mixing the formaldehyde scavenger, the binder and the solvent, then coating the mixture on a gypsum board, and drying to obtain the gypsum board loaded with the formaldehyde scavenger. Wherein the formaldehyde scavenger comprises modified activated carbon supported on manganese dioxide; the modified activated carbon is modified by 2-acetamido-5-aminopyridine. The gypsum board loaded with the formaldehyde scavenger has higher purification efficiency on formaldehyde, has persistent formaldehyde purification effect, and can permanently and effectively purify indoor environment.
Description
Technical Field
The invention belongs to the field of buildings, and particularly relates to a gypsum board loaded with an aldehyde scavenger and a preparation method thereof.
Background
Along with the development of economy and the improvement of the living standard of people, people are more and more popular for the decoration of living rooms and office environments and the comfort and upscaling of furniture, thereby driving the hot tide of decoration and the increasing prominence of indoor air pollution caused by building decoration and building materials.
Gypsum building products, including lightweight wall materials gypsum board, gypsum wall products. The main products of the gypsum wall material are as follows: gypsum board, gypsum block, gypsum lath, gypsum composite board, etc. and also some gypsum powder products for wall and indoor decoration. Features light weight, shock resistance, low heat conductivity, incombustibility, sound insulation, moisture absorption and low shrinkage, and can be nailed and sawed. CaSO requirements in gypsum for gypsum building products 4 ·2H 2 O>75%. Gypsum board is used as a ceiling material in many households and public places because of its low cost and good decorative effect. Peng Li et al (reference: nitrogen doped TiO with plasterboard as carrier 2 Experimental study on powder photocatalytic degradation of indoor formaldehyde pollution [ D]University of Chongqing, 2009.) a titanium dioxide photocatalyst is supported on a building material using a building gypsum board as a carrierThe used gypsum board surface is used for purifying indoor air and degrading organic pollutants in the indoor air through the use of building materials. The photocatalyst has the environment-friendly function, does not influence the building material function of the gypsum board, and solves the problem that gypsum is accumulated into solid waste. CN 110655373A discloses an indoor formaldehyde purifying gypsum board and a preparation method thereof; the method comprises the following steps: step 1: weighing formaldehyde purifying agent, adsorbent and modified starch, and stirring uniformly in advance; step 2: weighing a foaming agent and a reinforcing agent, and adding the foaming agent and the reinforcing agent into water for stirring; adding the mixed powder in the step 1 into the mixture solution in the step 2, uniformly stirring, adding building gypsum powder, and uniformly stirring; step 4: shaping; step 5: drying; the gypsum board has higher formaldehyde purification rate; while also maintaining a high purge rate.
Disclosure of Invention
The invention aims to provide the gypsum board with higher purification efficiency on formaldehyde, and meanwhile, the gypsum board has lasting formaldehyde purification effect and can permanently and effectively purify indoor environment.
The technical scheme adopted by the invention for achieving the purpose is as follows:
the invention discloses a gypsum board, wherein an aldehyde scavenger is loaded on the gypsum board;
the formaldehyde scavenger comprises modified activated carbon loaded on manganese dioxide;
the modified activated carbon is modified by 2-acetamido-5-aminopyridine.
The invention adopts the 2-acetamido-5-aminopyridine modified activated carbon to prepare the modified activated carbon, loads the modified activated carbon on manganese dioxide to prepare the formaldehyde scavenger, and then uniformly coats the formaldehyde scavenger on the gypsum board, thereby improving the purification effect of the gypsum board on formaldehyde, improving the durability of the formaldehyde purification effect of the gypsum board, and meeting the requirement of the use standard.
As a preferred embodiment of the invention, the gypsum board has an areal density of greater than 500kg/m 3 。
As a preferred embodiment of the present invention, the modified activated carbon is prepared by the following steps: pretreating the activated carbon, soaking the pretreated activated carbon in 2-acetamido-5-aminopyridine for treatment, cleaning and drying to obtain the modified activated carbon.
The invention also discloses application of the gypsum board in permanently and effectively purifying indoor environment.
As a preferred embodiment of the invention, the purification efficiency of gypsum board for formaldehyde is higher than 88%.
As a preferred embodiment of the invention, the formaldehyde purification effect of the gypsum board is more than 75% durable after 15 days of testing according to JC/T1074-2021 standard test.
The invention also discloses a preparation method of the gypsum board loaded with the formaldehyde scavenger, which comprises the following steps:
adding modified activated carbon into potassium permanganate solution, adding manganese dichloride solution, stirring uniformly, washing, centrifuging, and drying to obtain modified activated carbon loaded on manganese dioxide, namely an aldehyde scavenger;
and uniformly stirring and mixing the formaldehyde scavenger, the binder and the solvent, then coating the mixture on a gypsum board, and drying to obtain the gypsum board loaded with the formaldehyde scavenger.
As a preferred embodiment of the invention, the weight ratio of the potassium permanganate, the manganese dichloride and the modified activated carbon is 1:0.5-1:1-4.
As a preferred embodiment of the present invention, the binder includes at least one of polyacrylamide, polyurethane, epoxy resin, urea resin.
As a preferred embodiment of the present invention, the weight ratio of the formaldehyde scavenger, the binder to the solvent is 0.1-0.4:2-5:20-40. The formaldehyde purifying agent is uniformly coated on the gypsum board by adopting the binder, so that the formaldehyde purifying agent can be uniformly and firmly loaded on the gypsum board, and further the purification effect of the gypsum board on formaldehyde and the durability of the formaldehyde purification effect are improved.
The invention adopts the 2-acetamido-5-aminopyridine modified activated carbon to prepare the modified activated carbon, loads the modified activated carbon on manganese dioxide to prepare the formaldehyde scavenger, and then uniformly coats the formaldehyde scavenger on the gypsum board, thereby improving the purification effect of the gypsum board on formaldehyde, improving the durability of the formaldehyde purification effect of the gypsum board, and meeting the requirement of the use standard. Therefore, the gypsum board has higher purification efficiency on formaldehyde, has lasting formaldehyde purification effect, and can permanently and effectively purify indoor environment.
Drawings
FIG. 1 is a surface element composition of activated carbon and formaldehyde scavenger before and after modification in example 2;
FIG. 2 is a photograph of the appearance of gypsum board of example 2;
FIG. 3 is a photograph of the appearance of gypsum board of example 6.
Detailed Description
For a better description of the objects, technical solutions and advantages of the present invention, the present invention will be further described with reference to the following specific examples. It will be appreciated by persons skilled in the art that the specific embodiments described herein are for purposes of illustration only and are not intended to be limiting. In the examples, the experimental methods used, unless otherwise specified, were all conventional; the materials, reagents and the like used, unless otherwise specified, are all commercially available.
The invention also specifically discloses a preparation method of the modified activated carbon, which comprises the following steps:
providing active carbon, cleaning the active carbon with distilled water, placing the active carbon at 100-110 ℃, heating to 450-500 ℃ at a heating rate of 2-4 ℃/min under nitrogen atmosphere, preserving heat for 1-2h, and cooling to room temperature to obtain pretreated active carbon;
soaking the pretreated activated carbon in 2-acetamido-5-aminopyridine ethanol solution with the concentration of 0.15-0.75wt% for 2-4h, then drying in an oven with the temperature of 80-100 ℃ for 18-24h, cooling to room temperature, cleaning with absolute ethyl alcohol, and drying to constant weight to obtain the modified activated carbon.
The invention also specifically discloses a preparation method of the formaldehyde scavenger, which comprises the following steps: adding the modified activated carbon into a potassium permanganate solution, stirring and mixing for 1-3 hours, adding a manganese dichloride solution, stirring and mixing for 3-6 hours, washing with distilled water and absolute ethyl alcohol, centrifuging at a speed of 5000-8000r/min for 10-20 minutes, and drying at 75-85 ℃ for 10-15 hours, wherein the weight ratio of the potassium permanganate, the manganese dichloride and the modified activated carbon is 1:0.5-1:1-4, so as to obtain the modified activated carbon loaded on manganese dioxide, namely the formaldehyde scavenger.
In the preparation method of the formaldehyde scavenger, the concentration of the potassium permanganate solution is 5-10wt%; the concentration of the manganese dichloride solution is 4-8wt%.
The invention also specifically discloses a preparation method of the gypsum board loaded with the formaldehyde scavenger, which comprises the following steps:
adding modified activated carbon into potassium permanganate solution with the concentration of 5-10wt%, stirring and mixing for 1-3 hours, adding manganese dichloride solution with the concentration of 4-8wt%, stirring and mixing for 3-6 hours, washing with distilled water and absolute ethyl alcohol in turn, centrifuging for 10-20 minutes at the speed of 5000-8000r/min, and drying for 10-15 hours at the temperature of 75-85 ℃, wherein the weight ratio of potassium permanganate, manganese dichloride and modified activated carbon is 1:0.5-1:1-4, so as to obtain modified activated carbon loaded on manganese dioxide, namely an aldehyde scavenger;
uniformly stirring and mixing the formaldehyde scavenger, the binder and the solvent according to the weight ratio of 0.1-0.4:2-5:20-40, then coating the mixture on a gypsum board, and drying the gypsum board at 50-60 ℃ for 4-8 hours to obtain the gypsum board loaded with the formaldehyde scavenger.
The solvent used in the preparation method of the gypsum board is one of water and absolute ethyl alcohol.
In order to enable the formaldehyde scavenger to be better and uniformly adhered to the gypsum board, the preferable measures adopted by the invention further comprise: after the formaldehyde scavenger, the binder, the erythritol and the solvent are uniformly mixed, the mixture is uniformly coated on the gypsum board, so that the adhesion firmness of the formaldehyde scavenger and the coating uniformity of the formaldehyde scavenger on the gypsum board are improved, the formaldehyde purifying efficiency of the gypsum board is further improved, and meanwhile, the lasting formaldehyde purifying effect is improved.
As a preferred embodiment of the present invention, erythritol is added in an amount of 5 to 15% by weight of the binder.
The technical scheme of the invention is further described in detail below with reference to the specific embodiments and the attached drawings:
example 1:
a method for preparing modified activated carbon, comprising:
providing active carbon (with average granularity of 150 meshes), cleaning the active carbon with distilled water, placing the active carbon at 100 ℃, heating to 480 ℃ at a heating rate of 3.5 ℃/min under nitrogen atmosphere, preserving heat for 2 hours, and cooling to room temperature to obtain pretreated active carbon;
and (3) soaking the pretreated activated carbon in a 2-acetamido-5-aminopyridine ethanol solution with the concentration of 0.45wt% for 3 hours, then drying the activated carbon in a baking oven with the temperature of 90 ℃ for 20 hours, cooling the activated carbon to room temperature, cleaning the activated carbon with absolute ethyl alcohol, and drying the activated carbon to constant weight to obtain the modified activated carbon.
Example 2:
a preparation method of gypsum board loaded with formaldehyde scavenger comprises the following steps:
adding the modified activated carbon in the embodiment 1 into a potassium permanganate solution with the concentration of 5wt%, stirring and mixing for 2 hours, adding a manganese dichloride solution with the concentration of 6wt%, stirring and mixing for 4 hours, washing with distilled water and absolute ethyl alcohol in turn, centrifuging for 15 minutes at a speed of 8000r/min, and drying at 80 ℃ for 12 hours, wherein the weight ratio of the potassium permanganate, the manganese dichloride and the modified activated carbon is 1:0.8:2, so as to obtain the modified activated carbon loaded on manganese dioxide, namely the formaldehyde scavenger;
aldehyde scavenger, pregelatinized starch (density 1.39 g/cm) 3 ) Mixing with distilled water at a weight ratio of 0.25:3:20, stirring, and uniformly coating on gypsum board (surface density 600kg/m 3 ) Drying at 55deg.C for 5 hr to obtain gypsum board loaded with formaldehyde scavenger, wherein the thickness of formaldehyde scavenger on the surface of gypsum board is 1.2 μm.
Example 3:
the preparation method of gypsum board loaded with formaldehyde scavenger is the same as in example 2, except that in example 2: adding the modified activated carbon in the embodiment 1 into a potassium permanganate solution with the concentration of 5wt%, stirring and mixing for 2 hours, adding a manganese dichloride solution with the concentration of 6wt%, stirring and mixing for 4 hours, washing with distilled water and absolute ethyl alcohol in turn, centrifuging for 20 minutes at the speed of 6000r/min, and drying at 80 ℃ for 12 hours, wherein the weight ratio of the potassium permanganate, the manganese dichloride and the modified activated carbon is 1:0.8:4, and obtaining the modified activated carbon loaded on manganese dioxide, namely the formaldehyde scavenger.
Example 4:
the preparation method of gypsum board loaded with formaldehyde scavenger is the same as in example 2, except that in example 2: uniformly stirring and mixing the formaldehyde scavenger, the polyacrylamide and distilled water according to the weight ratio of 0.4:5:30, uniformly coating the mixture on a gypsum board, and drying the gypsum board at 55 ℃ for 5 hours to obtain the gypsum board loaded with the formaldehyde scavenger.
Example 5:
the preparation method of gypsum board loaded with formaldehyde scavenger is the same as in example 2, except that in example 2: the modified activated carbon in example 1 was replaced with unmodified activated carbon (average particle size 150 mesh).
Example 6:
the preparation method of gypsum board loaded with formaldehyde scavenger is the same as in example 2, except that in example 2: uniformly stirring and mixing the formaldehyde scavenger, polyacrylamide, erythritol and distilled water according to the weight ratio of 0.25:3:0.15:20, uniformly coating the mixture on a gypsum board, and drying the gypsum board at 55 ℃ for 5 hours to obtain the gypsum board loaded with the formaldehyde scavenger.
Example 7:
the preparation method of gypsum board loaded with formaldehyde scavenger is the same as in example 2, except that in example 2: uniformly stirring and mixing the formaldehyde scavenger, polyacrylamide, erythritol and distilled water according to the weight ratio of 0.25:3:0.25:20, uniformly coating the mixture on a gypsum board, and drying the gypsum board at 55 ℃ for 5 hours to obtain the gypsum board loaded with the formaldehyde scavenger.
Example 8:
the preparation method of gypsum board loaded with formaldehyde scavenger is the same as in example 2, except that in example 2: uniformly stirring and mixing the formaldehyde scavenger, polyacrylamide, erythritol and distilled water according to the weight ratio of 0.25:3:0.45:20, uniformly coating the mixture on a gypsum board, and drying the gypsum board at 55 ℃ for 5 hours to obtain the gypsum board loaded with the formaldehyde scavenger.
Example 9:
the preparation method of gypsum board loaded with formaldehyde scavenger is the same as in example 5, except that in example 5: uniformly stirring and mixing the formaldehyde scavenger, polyacrylamide, erythritol and distilled water according to the weight ratio of 0.25:3:0.45:20, uniformly coating the mixture on a gypsum board, and drying the gypsum board at 55 ℃ for 5 hours to obtain the gypsum board loaded with the formaldehyde scavenger.
Example 10:
1. structural characterization of aldehyde scavenger
The surface element composition of the activated carbon before and after modification and the surface element composition of the formaldehyde scavenger of manganese dioxide loaded with the modified activated carbon were tested by an XPS instrument.
FIG. 1 is a surface element composition of activated carbon and formaldehyde scavenger before and after modification in example 2; curves a, b and c are respectively active carbon, modified active carbon and aldehyde scavenger; as can be seen from fig. 1, the modified activated carbon has a nitrogen-containing functional group structure around the binding energy 395eV, compared with the activated carbon, illustrating that the modified activated carbon is prepared by using 2-acetamido-5-aminopyridine modified activated carbon; in the formaldehyde scavenger, mn2p functional group structure appears, and Mn2p3/2 and Mn2p1/2 orbitals are split near the binding energies 655 and 658, so that the formaldehyde scavenger of manganese dioxide loaded with modified activated carbon is used.
2. Gypsum board appearance test
And photographing the prepared gypsum board, and observing the distribution condition of the formaldehyde scavenger on the gypsum board.
FIGS. 2 and 3 are photographs showing the appearance of gypsum boards of example 2 and example 6, respectively; as can be seen from fig. 2, in example 2, the distribution of the formaldehyde scavenger on the gypsum board is relatively uniform, but the aggregation phenomenon also exists, and the distribution of the formaldehyde scavenger is uneven, so that aggregation occurs; as can be seen from fig. 3, the aldehyde scavenger in example 6 is distributed uniformly in the gypsum board, and no obvious agglomeration phenomenon occurs; the method shows that after the formaldehyde scavenger, the binder, the erythritol and the solvent are uniformly mixed, the mixture is uniformly coated on the gypsum board, so that the distribution uniformity of the formaldehyde scavenger on the gypsum board can be improved, and the lasting purification performance of the gypsum board is further improved.
3. Testing of firmness performance of gypsum board loaded aldehyde scavenger
The resulting plasterboard was inverted for 48 hours, and the surface of the plasterboard was lightly brushed with a soft brush to observe whether the aldehyde scavenger was dropped.
TABLE 1 test results of the fastness properties of the plasterboard loaded with aldehyde scavenger
As can be seen from Table 1, the gypsum boards of examples 2-5 were inverted for 48 hours without the powder falling off of the formaldehyde scavenger, while a small amount of powder falling off occurred with a soft brush; the formaldehyde scavenger can be firmly loaded on the gypsum board under the conditions of hanging the gypsum board upside down and not damaging the surface of the gypsum board, and can not fall off, namely, the formaldehyde scavenger has better combination degree with the gypsum board; the gypsum boards of examples 6-9 were inverted for 48 hours without powder shedding of the formaldehyde scavenger, and were lightly brushed with a soft brush without powder shedding; comparing examples 6-8 with example 2, examples 5 and 9, the firmness of the formaldehyde scavenger in examples 6-8 on the gypsum board is better than that of example 2, and the firmness of the formaldehyde scavenger in example 9 on the gypsum board is better than that of example 5, which shows that after the formaldehyde scavenger, the binder, the erythritol and the solvent are uniformly mixed, the mixture is uniformly coated on the gypsum board, so that the combination firmness of the formaldehyde scavenger and the gypsum board can be improved, and the lasting purification performance of the gypsum board is further improved.
4. Performance test for purifying formaldehyde of gypsum board
The gypsum board was tested for formaldehyde-purifying properties according to the JC/T1074-2021 standard and for durability after 15 days of continuous testing.
TABLE 2 efficiency of plasterboard in purifying formaldehyde and durability test results
As can be seen from Table 2, the formaldehyde purification rate of the gypsum board in examples 2-5 is higher than 88%, the durability of the formaldehyde purification effect is still higher than 75% after 15 days of testing, and the standard requirement (class I) of 24 hours of testing specified by JC/T1074-2021 standard is met; this indicates that the modified activated carbon is prepared by modifying the activated carbon with 2-acetamido-5-aminopyridine; loading the formaldehyde purifying agent on manganese dioxide to prepare a formaldehyde purifying agent, and coating the formaldehyde purifying agent on a gypsum board to purify formaldehyde, wherein the formaldehyde purifying agent has higher formaldehyde purifying rate and lasting formaldehyde purifying effect; the formaldehyde purification rate of the gypsum board in examples 6-8 is higher than 95%, and the persistence of the formaldehyde purification effect is higher than 89% after 15 days of testing; comparing examples 6-8 with example 2, examples 5 and 9, the formaldehyde purification rate and the durability of the formaldehyde purification effect of the gypsum board in examples 6-8 are higher than those of example 2, and the formaldehyde purification rate and the durability of the formaldehyde purification effect of the gypsum board in example 9 are higher than those of example 5, which shows that after the formaldehyde scavenger, the binder, the erythritol and the solvent are uniformly mixed, the mixture is uniformly coated on the gypsum board, so that the combination firmness of the formaldehyde scavenger and the gypsum board can be improved, and the durability of the gypsum board is further improved.
Conventional operations in the operation steps of the present invention are well known to those skilled in the art, and are not described herein.
While the foregoing embodiments have been described in detail in connection with the embodiments of the invention, it should be understood that the foregoing embodiments are merely illustrative of the invention and are not intended to limit the invention, and any modifications, additions, substitutions and the like made within the principles of the invention are intended to be included within the scope of the invention.
Claims (8)
1. A gypsum board loaded with formaldehyde scavenger is characterized in that: loading an aldehyde scavenger on the gypsum board; the formaldehyde scavenger comprises modified activated carbon loaded on manganese dioxide; the modified activated carbon is modified by 2-acetamido-5-aminopyridine;
the preparation method of the modified activated carbon comprises the following steps:
providing active carbon, cleaning the active carbon with distilled water, placing the active carbon at 100-110 ℃, heating to 450-500 ℃ at a heating rate of 2-4 ℃/min under nitrogen atmosphere, preserving heat for 1-2h, and cooling to room temperature to obtain pretreated active carbon;
soaking the pretreated activated carbon in a 2-acetamido-5-aminopyridine ethanol solution with the concentration of 0.15-0.75wt% for 2-4h, then drying in an oven at 80-100 ℃ for 18-24h, cooling to room temperature, cleaning with absolute ethanol, and drying to constant weight to obtain modified activated carbon;
the purification efficiency of the gypsum board to formaldehyde is higher than 88%.
2. A formaldehyde scavenger loaded gypsum board according to claim 1, wherein: the gypsum board has an areal density of greater than 500kg/m 3 。
3. Use of a gypsum board loaded with an aldehyde scavenger as defined in claim 1 for durable effective purification of indoor environments.
4. Use according to claim 3, characterized in that: the formaldehyde purification effect durability of the gypsum board is still higher than 75% after 15 days of testing according to JC/T1074-2021 standard test.
5. A preparation method of gypsum board loaded with formaldehyde scavenger comprises the following steps:
adding the modified activated carbon into a potassium permanganate solution, adding the potassium permanganate solution into a manganese dichloride solution, stirring uniformly, washing, centrifuging, and drying to obtain the modified activated carbon loaded on manganese dioxide, namely an aldehyde scavenger;
and (3) uniformly stirring and mixing the formaldehyde scavenger, the binder and the solvent, coating the mixture on a gypsum board, and drying to obtain the gypsum board loaded with the formaldehyde scavenger according to claim 1.
6. The method for preparing the gypsum board loaded with the formaldehyde scavenger according to claim 5, wherein the method comprises the following steps: the weight ratio of the potassium permanganate, the manganese dichloride and the modified activated carbon is 1:0.5-1:1-4.
7. The method for preparing the gypsum board loaded with the formaldehyde scavenger according to claim 5, wherein the method comprises the following steps: the binder comprises at least one of polyacrylamide, polyurethane, epoxy resin and urea-formaldehyde resin.
8. The method for preparing the gypsum board loaded with the formaldehyde scavenger according to claim 5, wherein the method comprises the following steps: the weight ratio of the formaldehyde scavenger, the binder and the solvent is 0.1-0.4:2-5:20-40.
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| JP2002211912A (en) * | 2001-01-10 | 2002-07-31 | Bridgestone Corp | Method for modifying activated carbon, modified activated carbon and adsorbent using the same |
| CN105435740A (en) * | 2015-11-18 | 2016-03-30 | 福建翔丰华新能源材料有限公司 | Preparation method for activated carbon formaldehyde adsorbent loaded with manganese dioxide |
| CN111606645A (en) * | 2019-04-17 | 2020-09-01 | 北新集团建材股份有限公司 | Aldehyde-removing paper-surface gypsum board and preparation method thereof |
| CN114515569A (en) * | 2022-01-30 | 2022-05-20 | 华南理工大学 | Biochar in-situ supported manganese dioxide catalyst and preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2002211912A (en) * | 2001-01-10 | 2002-07-31 | Bridgestone Corp | Method for modifying activated carbon, modified activated carbon and adsorbent using the same |
| CN105435740A (en) * | 2015-11-18 | 2016-03-30 | 福建翔丰华新能源材料有限公司 | Preparation method for activated carbon formaldehyde adsorbent loaded with manganese dioxide |
| CN111606645A (en) * | 2019-04-17 | 2020-09-01 | 北新集团建材股份有限公司 | Aldehyde-removing paper-surface gypsum board and preparation method thereof |
| CN114515569A (en) * | 2022-01-30 | 2022-05-20 | 华南理工大学 | Biochar in-situ supported manganese dioxide catalyst and preparation method and application thereof |
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