CN117599753A - Adsorption material based on molecular sieve and preparation method thereof - Google Patents
Adsorption material based on molecular sieve and preparation method thereof Download PDFInfo
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- 239000000463 material Substances 0.000 title claims abstract description 47
- 238000001179 sorption measurement Methods 0.000 title claims abstract description 45
- 239000002808 molecular sieve Substances 0.000 title claims abstract description 41
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 title claims abstract description 41
- 238000002360 preparation method Methods 0.000 title description 5
- 239000000835 fiber Substances 0.000 claims abstract description 20
- 239000003365 glass fiber Substances 0.000 claims abstract description 20
- 239000000919 ceramic Substances 0.000 claims abstract description 19
- 239000004744 fabric Substances 0.000 claims abstract description 19
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 19
- 239000002994 raw material Substances 0.000 claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims description 28
- 239000000243 solution Substances 0.000 claims description 21
- 238000003825 pressing Methods 0.000 claims description 19
- 238000004513 sizing Methods 0.000 claims description 16
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 15
- 238000001035 drying Methods 0.000 claims description 14
- 238000002156 mixing Methods 0.000 claims description 14
- 238000005096 rolling process Methods 0.000 claims description 14
- 239000002002 slurry Substances 0.000 claims description 14
- 239000000853 adhesive Substances 0.000 claims description 11
- 230000001070 adhesive effect Effects 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 10
- 239000008367 deionised water Substances 0.000 claims description 10
- 229910021641 deionized water Inorganic materials 0.000 claims description 10
- 239000011259 mixed solution Substances 0.000 claims description 10
- VXAUWWUXCIMFIM-UHFFFAOYSA-M aluminum;oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Al+3] VXAUWWUXCIMFIM-UHFFFAOYSA-M 0.000 claims description 7
- 239000011248 coating agent Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 7
- 238000013329 compounding Methods 0.000 claims description 7
- 150000001875 compounds Chemical class 0.000 claims description 7
- 238000005520 cutting process Methods 0.000 claims description 7
- 235000019353 potassium silicate Nutrition 0.000 claims description 7
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 7
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 7
- 229920001661 Chitosan Polymers 0.000 claims description 6
- 239000003463 adsorbent Substances 0.000 claims description 6
- BRLQWZUYTZBJKN-UHFFFAOYSA-N Epichlorohydrin Chemical compound ClCC1CO1 BRLQWZUYTZBJKN-UHFFFAOYSA-N 0.000 claims description 5
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims description 5
- 239000007864 aqueous solution Substances 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 230000007935 neutral effect Effects 0.000 claims description 5
- 230000005855 radiation Effects 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 230000008961 swelling Effects 0.000 claims description 5
- 238000000034 method Methods 0.000 claims 1
- 239000012784 inorganic fiber Substances 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract description 2
- 238000003795 desorption Methods 0.000 abstract description 2
- 230000008929 regeneration Effects 0.000 abstract description 2
- 238000011069 regeneration method Methods 0.000 abstract description 2
- 239000012855 volatile organic compound Substances 0.000 description 6
- 238000005485 electric heating Methods 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical class C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002241 glass-ceramic Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28002—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their physical properties
- B01J20/28011—Other properties, e.g. density, crush strength
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28054—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their surface properties or porosity
- B01J20/28057—Surface area, e.g. B.E.T specific surface area
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/3007—Moulding, shaping or extruding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/3078—Thermal treatment, e.g. calcining or pyrolizing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
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- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses an adsorption material based on a molecular sieve, which comprises a layer A and a layer B, wherein the layer A comprises the following raw materials in parts by weight: 10-20 parts of glass fiber, 10-15 parts of ceramic fiber, 25-35 parts of non-woven fabric and 20-35 parts of melt-blown cloth; the component B comprises the following raw materials in parts by weight: 10-20 parts of glass fiber, 10-15 parts of ceramic fiber, 25-35 parts of non-woven fabric and 20-35 parts of melt-blown cloth; the molecular sieve and the inorganic fiber are compounded and then are used as relative single inorganic fiber paper, so that on one hand, the mechanical property and the desorption regeneration property of the honeycomb material are improved, the defect of the performance of a single adsorption material is reduced, and the overall adsorption property and the use stability of the material are improved; on the other hand, the specific surface area and the adsorption capacity of the material are improved, and the removal efficiency of VOC gas is effectively improved.
Description
Technical Field
The invention belongs to the technical field of adsorption materials, and particularly relates to an adsorption material based on a molecular sieve and a preparation method thereof.
Background
The adsorption technology is one of the common technologies for VOC treatment, and the activated carbon fiber is used as an adsorption material, has a regular micropore structure and strong adsorption capacity, but has extremely low adsorption capacity for small-molecule VOCs with larger polarity, such as formaldehyde, ethanol, acetic acid and the like, and has higher flammability when being used as an adsorption material for treating high-boiling-point VOC. Molecular sieve is another commonly used adsorption material, because the molecular sieve surface area is smaller than that of activated carbon and the average weight is slightly higher than that of activated carbon fiber, the molecular sieve has excellent adsorption selectivity, good high-temperature stability and recycling performance when removing VOCs.
Chinese patent CN209810192U discloses a novel corrugated zeolite adsorbent material carrier: the corrugated honeycomb material is formed by mutually attaching and hot-pressing metal sheets, glass fibers or ceramic fibers to form a composite carrier and loading molecular sieves on the surface of the carrier, but the adsorption performance is influenced by the high weight and low activity content of the metal sheets.
Disclosure of Invention
In order to solve the technical problems, the invention provides an adsorption material based on a molecular sieve and a preparation method thereof.
The aim of the invention can be achieved by the following technical scheme:
the adsorption material based on the molecular sieve comprises a layer A and a layer B, wherein the layer A comprises the following raw materials in parts by weight: 10-20 parts of glass fiber, 10-15 parts of ceramic fiber, 25-35 parts of non-woven fabric and 20-35 parts of melt-blown cloth; the component B comprises the following raw materials in parts by weight: 10-20 parts of glass fiber, 10-15 parts of ceramic fiber, 25-35 parts of non-woven fabric and 20-35 parts of melt-blown cloth;
the molecular sieve-based adsorption material comprises the following steps:
uniformly mixing glass fibers, ceramic fibers, non-woven fabrics and melt-blown cloth, and flattening to prepare a mixed layer a and a mixed layer b; uniformly mixing 10-20 parts of water glass, 10-15 parts of molecular sieve, 20-30 parts of silica sol and 20-30 parts of pseudo-boehmite according to parts by weight to prepare slurry, respectively coating the slurry on the surfaces of a mixed layer a and a mixed layer b, heating and drying at 120-150 ℃ for 10-15s, pressing the coated mixed layer a by a corrugating machine, pressing at normal temperature to prepare a base layer a, and continuously sizing the surface of the mixed layer b by a roll shaft sizing machine to prepare a base layer b;
and step two, compounding the a base layer and the b base layer through a compound guide roller to form a corrugated board, drying the corrugated board at the temperature of 120-150 ℃ for 10-15s, then rolling, cutting, and roasting at the temperature of 550-700 ℃ for 20-24h to obtain the adsorption material based on the molecular sieve, wherein the rolling diameter is smaller than 800 mm.
Further, the adhesive for sizing comprises the following steps:
step S1, adding 1-5 parts by weight of PVA into 10-50 parts by weight of deionized water to prepare a solution c for later use; adding 200-350 parts of deionized water into 30-50 parts of chitosan, uniformly stirring until swelling, regulating the pH of a system to 4-6, then adding 1-2 parts of 10% ammonium persulfate aqueous solution by mass fraction, and uniformly stirring to obtain a mixed solution d;
and S2, adding the solution a into the mixed solution d, adding 10-15 parts by weight of 5% epichlorohydrin solution, heating to 65-75 ℃, uniformly stirring for 2 hours, dropwise adding 15% sodium hydroxide solution until the system is neutral, continuously heating to 85 ℃, reacting for 10 minutes, cooling to room temperature, standing and defoaming to obtain the adhesive.
Further, the heating mode is electric heating or infrared radiation by adopting a heating tube.
Further, the pressing speed of the corrugator is 0.5-1.5m/min.
A preparation method of an adsorption material based on a molecular sieve comprises the following steps:
uniformly mixing glass fibers, ceramic fibers, non-woven fabrics and melt-blown cloth, and flattening to prepare a mixed layer a and a mixed layer b; uniformly mixing 10-20 parts of water glass, 10-15 parts of molecular sieve, 20-30 parts of silica sol and 20-30 parts of pseudo-boehmite according to parts by weight to prepare slurry, respectively coating the slurry on the surfaces of a mixed layer a and a mixed layer b, heating and drying at 120-150 ℃ for 10-15s, pressing the coated mixed layer a by a corrugating machine, pressing at normal temperature to prepare a base layer a, and continuously sizing the surface of the mixed layer b by a roll shaft sizing machine to prepare a base layer b;
and step two, compounding the a base layer and the b base layer through a compound guide roller to form a corrugated board, drying the corrugated board at the temperature of 120-150 ℃ for 10-15s, then rolling, cutting, and roasting at the temperature of 550-700 ℃ for 20-24h to obtain the adsorption material based on the molecular sieve, wherein the rolling diameter is smaller than 800 mm.
The invention has the beneficial effects that:
according to the adsorption material based on the molecular sieve, the A is laminated to be corrugated, and the molecular sieve and the inorganic fiber are compounded and then the relative single inorganic fiber paper is used, so that on one hand, the mechanical property and the desorption regeneration property of the honeycomb material are improved, the defect of the performance of the single adsorption material is reduced, and the overall adsorption performance and the use stability of the material are improved; on the other hand, the specific surface area and the adsorption capacity of the material are improved, and the removal efficiency of VOC gas is effectively improved;
in addition, the adhesive is prepared by crosslinking PVA with chitosan, does not contain organic volatile matters, has less pollution, is more environment-friendly, has stronger bonding strength and higher water resistance, and prevents the phenomena of glue opening and the like of the adsorption material in a wet environment after the adsorption material is glued.
Detailed Description
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. 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
The adsorption material based on the molecular sieve comprises a layer A and a layer B, wherein the layer A comprises the following raw materials in parts by weight: 10 parts of glass fiber, 10 parts of ceramic fiber, 25 parts of non-woven fabric and 20 parts of melt-blown cloth; the component B comprises the following raw materials in parts by weight: 10 parts of glass fiber, 10 parts of ceramic fiber, 25 parts of non-woven fabric and 20 parts of melt-blown cloth;
the molecular sieve-based adsorption material comprises the following steps:
uniformly mixing glass fibers, ceramic fibers, non-woven fabrics and melt-blown cloth, and flattening to prepare a mixed layer a and a mixed layer b; uniformly mixing 10 parts of water glass, 10 parts of molecular sieve, 20 parts of silica sol and 20 parts of pseudo-boehmite according to parts by weight to prepare slurry, respectively coating the slurry on the surfaces of a mixed layer a and a mixed layer b, heating and drying at 120 ℃ for 10 seconds, pressing the coated mixed layer a by using a corrugating machine, pressing at normal temperature to prepare an a base layer, and continuously sizing the surface of the mixed layer b by using a roll shaft sizing machine to prepare a b base layer;
and step two, compounding the a base layer and the b base layer through a compound guide roller to form a corrugated board, drying the corrugated board at the temperature of 120 ℃ for 10s, then rolling, cutting, and roasting at the temperature of 550 ℃ for 20h to obtain the adsorption material based on the molecular sieve, wherein the rolling diameter is smaller than 800 mm.
The adhesive is prepared by the following steps:
step S1, adding 1 part by weight of PVA into 10 parts by weight of deionized water to prepare a solution c for later use; adding 200 parts of deionized water into 30 parts of chitosan, uniformly stirring until swelling, regulating the pH of a system until the pH value is 4, then adding 1 part of 10% ammonium persulfate aqueous solution by mass fraction, and uniformly stirring to obtain a mixed solution d;
and S2, adding the solution a into the mixed solution d, adding 10 parts by weight of 5% epichlorohydrin solution, heating to 65 ℃, uniformly stirring for 2 hours, dropwise adding 15% sodium hydroxide solution until the system is neutral, continuously heating to 85 ℃, reacting for 10 minutes, cooling to room temperature, standing and defoaming to obtain the adhesive.
The heating mode is electric heating or infrared radiation by adopting a heating tube.
The pressing speed of the corrugator was 0.5m/min.
Example 2
The adsorption material based on the molecular sieve comprises a layer A and a layer B, wherein the layer A comprises the following raw materials in parts by weight: 15 parts of glass fiber, 12 parts of ceramic fiber, 30 parts of non-woven fabric and 25 parts of melt-blown cloth; the component B comprises the following raw materials in parts by weight: 15 parts of glass fiber, 12 parts of ceramic fiber, 30 parts of non-woven fabric and 30 parts of melt-blown cloth;
the molecular sieve-based adsorption material comprises the following steps:
uniformly mixing glass fibers, ceramic fibers, non-woven fabrics and melt-blown cloth, and flattening to prepare a mixed layer a and a mixed layer b; uniformly mixing 15 parts of water glass, 14 parts of molecular sieve, 25 parts of silica sol and 25 parts of pseudo-boehmite according to parts by weight to prepare slurry, respectively coating the slurry on the surfaces of a mixed layer a and a mixed layer b, heating and drying at 140 ℃ for 12 seconds, pressing the coated mixed layer a by using a corrugating machine, pressing at normal temperature to prepare an a base layer, and continuously sizing the surface of the mixed layer b by using a roll shaft sizing machine to prepare a b base layer;
and step two, compounding the a base layer and the b base layer through a compound guide roller to form a corrugated board, drying the corrugated board at the temperature of 140 ℃ for 14s, then rolling, cutting, and roasting at the temperature of 600 ℃ for 22h to obtain the adsorption material based on the molecular sieve, wherein the rolling diameter is smaller than 800 mm.
The adhesive is prepared by the following steps:
step S1, adding 3 parts by weight of PVA into 30 parts by weight of deionized water to prepare a solution c for later use; adding 300 parts of deionized water into 40 parts of chitosan, uniformly stirring until swelling, regulating the pH of a system until the pH value reaches 5, then adding 1-2 parts of 10% ammonium persulfate aqueous solution by mass fraction, and uniformly stirring to obtain a mixed solution d;
and S2, adding the solution a into the mixed solution d, adding 12 parts by weight of 5% epichlorohydrin solution, heating to 70 ℃, uniformly stirring for 2 hours, dropwise adding 15% sodium hydroxide solution until the system is neutral, continuously heating to 85 ℃, reacting for 10 minutes, cooling to room temperature, standing and defoaming to obtain the adhesive.
The heating mode is electric heating or infrared radiation by adopting a heating tube.
The pressing speed of the corrugator was 1m/min.
Example 3
The adsorption material based on the molecular sieve comprises a layer A and a layer B, wherein the layer A comprises the following raw materials in parts by weight: 20 parts of glass fiber, 15 parts of ceramic fiber, 35 parts of non-woven fabric and 35 parts of melt-blown cloth; the component B comprises the following raw materials in parts by weight: 20 parts of glass fiber, 15 parts of ceramic fiber, 35 parts of non-woven fabric and 35 parts of melt-blown cloth;
the molecular sieve-based adsorption material comprises the following steps:
uniformly mixing glass fibers, ceramic fibers, non-woven fabrics and melt-blown cloth, and flattening to prepare a mixed layer a and a mixed layer b; uniformly mixing 20 parts of water glass, 15 parts of molecular sieve, 30 parts of silica sol and 30 parts of pseudo-boehmite according to parts by weight to prepare slurry, respectively coating the slurry on the surfaces of a mixed layer a and a mixed layer b, heating and drying at 150 ℃ for 15 seconds, pressing the coated mixed layer a by using a corrugating machine, pressing at normal temperature to prepare an a base layer, and continuously sizing the surface of the mixed layer b by using a roll shaft sizing machine to prepare a b base layer;
and step two, compounding the a base layer and the b base layer through a compound guide roller to form a corrugated board, drying the corrugated board at the temperature of 150 ℃ for 15s, then rolling, cutting, and roasting at the temperature of 700 ℃ for 24 hours to obtain the adsorption material based on the molecular sieve, wherein the rolling diameter is smaller than 800 mm.
The adhesive is prepared by the following steps:
step S1, adding 5 parts by weight of PVA into 50 parts by weight of deionized water to prepare a solution c for later use; adding 350 parts of deionized water into 50 parts of chitosan, uniformly stirring until swelling, regulating the pH of a system until the pH value is 6, then adding 2 parts of 10% ammonium persulfate aqueous solution by mass fraction, and uniformly stirring to obtain a mixed solution d;
and S2, adding the solution a into the mixed solution d, adding 15 parts by weight of 5% epichlorohydrin solution, heating to 75 ℃, uniformly stirring for 2 hours, dropwise adding 15% sodium hydroxide solution until the system is neutral, continuously heating to 85 ℃, reacting for 10 minutes, cooling to room temperature, standing and defoaming to obtain the adhesive.
The heating mode is electric heating or infrared radiation by adopting a heating tube.
The pressing speed of the corrugator was 1.5m/min.
Comparative example 1
The comparative example is a commercially available corrugated honeycomb adsorbent material.
The adsorption properties of the adsorption materials prepared in examples 1 to 3 and comparative example 1 were measured, and the results are shown in the following table 1:
VOC concentration of 200mg/m at normal temperature 3 Wind speed is 0.5m/s, air flow humidity is 50% RH, and sample thickness is 50mm;
TABLE 1
From Table 1 above, it can be seen that the adsorbent materials prepared in examples 1 to 3 of the present invention have good adsorption properties.
The foregoing is merely illustrative and explanatory of the principles of the invention, as various modifications and additions may be made to the specific embodiments described, or similar thereto, by those skilled in the art, without departing from the principles of the invention or beyond the scope of the appended claims.
Claims (5)
1. The molecular sieve-based adsorption material is characterized by comprising a layer A and a layer B, wherein the layer A comprises the following raw materials in parts by weight: 10-20 parts of glass fiber, 10-15 parts of ceramic fiber, 25-35 parts of non-woven fabric and 20-35 parts of melt-blown cloth; the component B comprises the following raw materials in parts by weight: 10-20 parts of glass fiber, 10-15 parts of ceramic fiber, 25-35 parts of non-woven fabric and 20-35 parts of melt-blown cloth;
the molecular sieve-based adsorption material comprises the following steps:
uniformly mixing glass fibers, ceramic fibers, non-woven fabrics and melt-blown cloth, and flattening to prepare a mixed layer a and a mixed layer b; uniformly mixing 10-20 parts of water glass, 10-15 parts of molecular sieve, 20-30 parts of silica sol and 20-30 parts of pseudo-boehmite according to parts by weight to prepare slurry, respectively coating the slurry on the surfaces of a mixed layer a and a mixed layer b, heating and drying at 120-150 ℃ for 10-15s, pressing the coated mixed layer a by a corrugating machine, pressing at normal temperature to prepare a base layer a, and continuously sizing the surface of the mixed layer b by a roll shaft sizing machine to prepare a base layer b;
and step two, compounding the a base layer and the b base layer through a compound guide roller to form a corrugated board, drying the corrugated board at the temperature of 120-150 ℃ for 10-15s, then rolling, cutting, and roasting at the temperature of 550-700 ℃ for 20-24h to obtain the adsorption material based on the molecular sieve, wherein the rolling diameter is smaller than 800 mm.
2. The molecular sieve-based adsorbent material of claim 1, wherein the sizing adhesive comprises the steps of:
step S1, adding 1-5 parts by weight of PVA into 10-50 parts by weight of deionized water to prepare a solution c for later use; adding 200-350 parts of deionized water into 30-50 parts of chitosan, uniformly stirring until swelling, regulating the pH of a system to 4-6, then adding 1-2 parts of 10% ammonium persulfate aqueous solution by mass fraction, and uniformly stirring to obtain a mixed solution d;
and S2, adding the solution a into the mixed solution d, adding 10-15 parts by weight of 5% epichlorohydrin solution, heating to 65-75 ℃, uniformly stirring for 2 hours, dropwise adding 15% sodium hydroxide solution until the system is neutral, continuously heating to 85 ℃, reacting for 10 minutes, cooling to room temperature, standing and defoaming to obtain the adhesive.
3. A molecular sieve based adsorbent material according to claim 1, wherein said heating is by means of heating tubes for electrical heating or infrared radiation.
4. The molecular sieve-based adsorbent material of claim 1, wherein the corrugator has a pressing speed of 0.5-1.5m/min.
5. The method for preparing the molecular sieve-based adsorption material according to claim 1, comprising the following steps:
uniformly mixing glass fibers, ceramic fibers, non-woven fabrics and melt-blown cloth, and flattening to prepare a mixed layer a and a mixed layer b; uniformly mixing 10-20 parts of water glass, 10-15 parts of molecular sieve, 20-30 parts of silica sol and 20-30 parts of pseudo-boehmite according to parts by weight to prepare slurry, respectively coating the slurry on the surfaces of a mixed layer a and a mixed layer b, heating and drying at 120-150 ℃ for 10-15s, pressing the coated mixed layer a by a corrugating machine, pressing at normal temperature to prepare a base layer a, and continuously sizing the surface of the mixed layer b by a roll shaft sizing machine to prepare a base layer b;
and step two, compounding the a base layer and the b base layer through a compound guide roller to form a corrugated board, drying the corrugated board at the temperature of 120-150 ℃ for 10-15s, then rolling, cutting, and roasting at the temperature of 550-700 ℃ for 20-24h to obtain the adsorption material based on the molecular sieve, wherein the rolling diameter is smaller than 800 mm.
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