SE2251142A1 - Adsorbent material - Google Patents
Adsorbent materialInfo
- Publication number
- SE2251142A1 SE2251142A1 SE2251142A SE2251142A SE2251142A1 SE 2251142 A1 SE2251142 A1 SE 2251142A1 SE 2251142 A SE2251142 A SE 2251142A SE 2251142 A SE2251142 A SE 2251142A SE 2251142 A1 SE2251142 A1 SE 2251142A1
- Authority
- SE
- Sweden
- Prior art keywords
- porous material
- cellulose
- inorganic carrier
- carrier particles
- organic amine
- Prior art date
Links
- 239000000463 material Substances 0.000 title claims description 29
- 239000003463 adsorbent Substances 0.000 title description 8
- 239000011148 porous material Substances 0.000 claims abstract description 68
- 239000001913 cellulose Substances 0.000 claims abstract description 55
- 229920002678 cellulose Polymers 0.000 claims abstract description 55
- 239000002245 particle Substances 0.000 claims abstract description 34
- 150000001412 amines Chemical class 0.000 claims abstract description 31
- 239000012855 volatile organic compound Substances 0.000 claims abstract description 28
- 239000011159 matrix material Substances 0.000 claims abstract description 15
- 239000007787 solid Substances 0.000 claims abstract description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 34
- 229920002873 Polyethylenimine Polymers 0.000 claims description 22
- 239000000203 mixture Substances 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000004806 packaging method and process Methods 0.000 claims description 5
- 239000007864 aqueous solution Substances 0.000 claims description 3
- 239000003431 cross linking reagent Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 239000000809 air pollutant Substances 0.000 description 7
- 231100001243 air pollutant Toxicity 0.000 description 7
- 239000007788 liquid Substances 0.000 description 7
- 238000001179 sorption measurement Methods 0.000 description 7
- 239000006260 foam Substances 0.000 description 6
- 239000004971 Cross linker Substances 0.000 description 5
- 239000008259 solid foam Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- -1 PEI Chemical class 0.000 description 4
- 206010052428 Wound Diseases 0.000 description 4
- 208000027418 Wounds and injury Diseases 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 235000019645 odor Nutrition 0.000 description 3
- IKHGUXGNUITLKF-UHFFFAOYSA-N Acetaldehyde Chemical compound CC=O IKHGUXGNUITLKF-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 125000003277 amino group Chemical group 0.000 description 2
- 230000000845 anti-microbial effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010954 inorganic particle Substances 0.000 description 2
- 230000004630 mental health Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000002121 nanofiber Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- IKHGUXGNUITLKF-XPULMUKRSA-N acetaldehyde Chemical compound [14CH]([14CH3])=O IKHGUXGNUITLKF-XPULMUKRSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 150000001345 alkine derivatives Chemical class 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910052570 clay Inorganic materials 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000001419 dependent effect Effects 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
- 238000001035 drying Methods 0.000 description 1
- 239000006261 foam material Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000008240 homogeneous mixture Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000004620 low density foam Substances 0.000 description 1
- 238000003760 magnetic stirring Methods 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 239000012621 metal-organic framework Substances 0.000 description 1
- 238000006552 photochemical reaction Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000768 polyamine Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011541 reaction mixture Substances 0.000 description 1
- 208000023504 respiratory system disease Diseases 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000036642 wellbeing Effects 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
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/103—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate comprising silica
-
- 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
-
- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/72—Organic compounds not provided for in groups B01D53/48 - B01D53/70, e.g. hydrocarbons
-
- 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
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
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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
- B01J20/24—Naturally occurring macromolecular compounds, e.g. humic acids or their derivatives
-
- 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
- B01J20/26—Synthetic macromolecular compounds
- B01J20/262—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon to carbon unsaturated bonds, e.g. obtained by polycondensation
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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
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28014—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 form
- B01J20/28016—Particle form
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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
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28014—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 form
- B01J20/28042—Shaped bodies; Monolithic structures
- B01J20/28045—Honeycomb or cellular structures; Solid foams or sponges
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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
- B01J20/281—Sorbents specially adapted for preparative, analytical or investigative chromatography
- B01J20/282—Porous sorbents
- B01J20/283—Porous sorbents based on silica
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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
- B01J20/281—Sorbents specially adapted for preparative, analytical or investigative chromatography
- B01J20/282—Porous sorbents
- B01J20/284—Porous sorbents based on alumina
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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
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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
- B01J20/3028—Granulating, agglomerating or aggregating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/02—Types of fibres, filaments or particles, self-supporting or supported materials
- B01D2239/0258—Types of fibres, filaments or particles, self-supporting or supported materials comprising nanoparticles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/106—Silica or silicates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/25—Coated, impregnated or composite adsorbents
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- 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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/06—Polluted air
Landscapes
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Inorganic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
A porous material for adsorbing volatile organic compounds, VOCs, wherein the porous material is a solid dry porous material comprising a fibrous matrix of cellulose and inorganic carrier particles, and wherein an organic amine is attached to at least the inorganic carrier particles.
Description
Field of the Invention The present disclosure relates to adsorbent materials. In particular it relates to chemisorbant materials for the adsorption of volatile organic compounds.
Background of the invention UnWanted air pollutants can cause unWanted effects in many areas, often negative effects on human health & Wellbeing or cause damages to products & sensitive objects. Air pollutants in indoor environments can reach high concentrations and cause respiratory diseases, consequently, shortening life expectancy. Most air pollutants cause odors Which in tum may result in mental health issues. In advanced Wound applications, Wounds Will eventually give off a strong and unpleasant odor. The result is often that the patient suffers Worsened mental health. Air pollutants can also damage products and sensitive objects of high value. This problem is large Within art conservation Where air pollutants deteriorate Works of art.
An example of air pollutants are volatile organic compounds, VOCs. VOCs are typically defined as any compound of carbon, excluding: carbon monoxide, carbon dioxide, carbonic acid, metallic carbides or carbonates; Which participate in atmospheric photochemical reactions.
There are several adsorbent materials on the market Where activated carbon is the dominant solution in air pollutant and odor removal. Other solutions consist of silica, zeolite, and metal organic frameworks. HoWever, producers are becoming increasingly aware of the environmental burden of their products Which has resulted in raW materials and carbon footprint being evaluated throughout the entire value chain. More efficient materials are needed to lower total environmental impact and lengthen the lifetime of products.
Summary of the invention Accordingly, the present invention preferably seeks to mitigate, alleviate or eliminate one or more of the above-identified deficiencies in the art and disadvantages singly or in any combination and solves at least the above mentioned problems by providing a porous material for adsorbing volatile organic compounds, VOCs, wherein the porous material is a solid dry porous material comprising a f1brous matrix of cellulose and inorganic carrier particles, and wherein an organic amine is attached to at least the inorganic carrier particles.
The combination of cellulose, inorganic carrier particles and the organic amine result in a solid and compliant material having high chemisorption performance, is non- or low-toxic and non-leeching.
A method for adsorbing VOCs is also provided.
Articles comprising the porous material are provided.
A method for producing the porous material is provided.
Further advantageous embodiments are disclosed in the appended and dependent patent claims.
Detailed description The porous material for adsorbing volatile organic compounds, VOCs, comprises a f1brous matrix of inorganic carrier particles and cellulose. An organic amine is attached to at least the inorganic carrier particles. The cellulose based porous material has a high adsorption capacity, is biobased and non- or low-toxic on surface contact, and low density, enabling efficient and low environmental impact VOC adsorption.
As described the porous material comprises a matrix of cellulose and inorganic carrier particles. The cellulose may be cellulose nanofibers (CNF) having a high aspect ratio. The CNF may have a width of from about 5 to about 20 nm. The CNF may have a length in the range of hundreds of nanometres to several micrometres. The cellulose may be sourced from a variety of known cellulose, or CNF sources.
As the porous material is cellulose based, the porous material may comprise more than about 10% dry weight. cellulose, such as CNF. The porous material may comprise from about 10% dry Weight cellulose to about 50% dry Weight cellulose. The cellulose and the inorganic carrier particles forrn a matrix of cellulose f1bres and inorganic carrier particles. The matrix is low density and has a high porosity such that the porous material may be considered a solid foam. The cellulose-inorganic particle matrix provides highly porous material through Which gas may pass. That is, the porous material displays high gas perrneability. High gas perrneability enables both improved VOC adsorption capacity and additional uses of the material Which Would not be possible With a solid, less perrneable material. A further advantage of the cellulose-based matrix is that the cellulose provides for a compliant solid porous material. The compliance of the solid porous material makes it especially suitable for various applications such as in packaging, in Wound care articles, sanitary articles etc. Where for example shock absorption and compliance is advantageous.
The porous material is a loW-density foam. The density of the porous material is less than 1 g/cm3. The density may be from about 0.01 g/cm3 to about 0.5 g/cm3. The density may be from about 0.05 g/cm3 to about 0.1 g/cm3, such as about 0.09 g/cm3.
The highly porous nature of the cellulose matrix enables the porous material to have improved insulation properties in comparison to other adsorbent material. Due to the pores the material, When in use, inherently comprises a large volume of air. The air is therrnally insulting. In addition to this, the compliance of the material combined With the air in the pores results in improved sound insultation properties.
A packaging foam may comprise, such as consist essentially of, the porous material. As the material may be dried in moulds of various size and shape, the packaging foam may be shaped to fit around an article. For example, the packaging foam may be shaped as a solid rectangle comprising a recessed portion for receiving a receiving an artwork.
The inorganic carrier particles are inorganic particles providing a high surface area to Which the organic amine may be attached. The inorganic carrier may be for example silica, clay, alumina. The inorganic carrier particle increases the rigidity of the porous material compared to an exclusively cellulose based matrix. The additional rigidity is especially advantageous to increase the usability of the material in various applications Where a solid, yet compliant material is desirable. The inorganic carrier particles are selected and/or activated such that an organic amine may be attached to their surfaces. Ideally, the inorganic carrier particles are silica. As described in the experimental section, silica has been shown to forrn a solid porous matrix With cellulose. Silica is particularly advantageous When combined With cellulose in the adsorbent material as the combination silica and cellulose is therrnally stable, and substantially heat resistant and fireproof The fibrous matrix of silica and cellulose has been shoWn to char When subjected to suff1cient heat, the charring forrning an insulating layer thus limiting or restricting combustion of the material.
The porous material may comprise more than about 5% dry Weight inorganic carrier particles. The porous material may comprise from about 10% to about 50% dry Weight inorganic carrier particles. The porous material may comprise from 20% to 30% dry Weight inorganic carrier particles, such as about 25%. The porous material may comprise cellulose and inorganic carrier particles at a ratio of from about 3:1 to about 1:1.
The organic amine is an organic molecule having at least one amine group. The organic amine has at least one alkane, alkene, alkyne, alkyl, or aryl group. Generally, the organic amine is a polyamine having multiple amine groups. The organic amine is preferably polyethylenimine (PEI). The organic amine, such as PEI, is attached to the surface of the inorganic carrier particles, such as silica particles. The organic amine may be attached to the cellulose present in the adsorbent material. PEI is especially suitable for chemisorption of VOCs.
It has been observed that on chemisorption of some VOCs, such as acetaldehyde, by PEI liquification may occur. That is, the PEI and VOC complex formed on adsorption undergoes liquification. The liquid formed may seep from a material and damage objects to Which the material is in contact. Advantageously, the cellulose, and in particular the capillary structure of the cellulose matrix, of the present porous material absorbs liquid formed after chemisorption of VOCs by PEI. The cellulose in the porous material thus absorbs liquid, and in particular liquified VOC-organic amine complexes.
Additionally, the porous material comprising PEI may undergo a colour change When exposed to VOCs. This function is provided by the PEI-inorganic carrier particle complex. Such a colour change enables the use of the porous material as an indicator of the presence of VOCs in an ambient environment.
Advantageously, the organic amine, such as PEI, provides an antibacterial and/or antimicrobial effect to the porous material. Such an antimicrobial effect is particularly advantageous in use as a Wound care or personal hygiene article.
The organic amine, such as PEI, may be present in an amount of greater than 1%, such as from about 1% to about 50%. The organic amine may be present in an amount of from about 10% to about 30%, such as about 30%.
The porous material may comprise additional additives, agents selected to improve the properties of the porous material. The porous material may comprise a cross- linker to cross-link and fix the organic amine Within the porous material. The cross-linker may form a chemically cross-linked organic amine, such as cross-linked polyethylenimine. The cross-linker may fix the organic amine to the inorganic carrier particles, may fix the organic amine to the cellulose, and may strengthen the cellulose. Ideally, a single cross-linking agent is selected Which provides each of the above cross- linking functions. The cross-linker may be provided in an amount of from about 0.5% to about 5% vol, such as from 1% to 5% vol. to an aqueous solution comprising a mixture of PEI and inorganic carrier particles, or an aqueous solution comprising a mixture of PEI, inorganic carrier particles and cellulose.
Where the concentrations in the above description are referred to as dry Weight the concentration refers to the dry mass of porous material. As the material is substantially dehydrated during production the concentration of any components provided in a liquid medium may be deterrnined based on their respective concentration in the liquid medium and the volume of liquid medium provided during production.
As described in the experimental section, the porous material is preferably formed via processing an aqueous mixture of the cellulose, inorganic carrier particles and organic amine. To promote the formation of the highly porous material the processing may comprise the step of adding a flocculant or a coagulant, or a cross-linker referred such as a Wet-strengthening agent.
A method for producing the porous material comprises providing cellulose, such as dry CNF, to a solution. Adding a solution comprising an organic amine, such as PEI, to the cellulose suspension. Mixing the cellulose and organic amine to form a homogenous mixture of cellulose and organic amine. Adding inorganic carrier particles, such as Silica, to the mixture. Mixing and Cooling, followed by treatment under Vacuum, the mixture of cellulose, organic amine, and inorganic carrier particles to forrn a solid foam material. Optionally, drying the solid foam material at a temperature of from about 60 °C to about 80 °C for 24 - 48 hours. Additional details of the method for preparing the solid foam can be found in the experimental section.
Experimental Section Preparatíon of porous adsorbent material The following describes a process for producing the porous adsorbent material. g dry mass of cellulose nanofibers, CNF, Were added to a flask With magnetic stirring. 7.14 g dry mass of PEI in 10 ml of MilliQ Water having a total mass of 17.14 g Were added to the receptacle under stirring. An additional 20 ml of MilliQ Water Was added to the receptacle. The mixture Was covered and stirred. The reaction mixture Was thereafter mixed in a reactor for about 2 hours.
To extract Water from the mixture, the mixture Was then centrifuged to separate the Water from the cellulose, silica, and PEI sediment.
The centrifuged mixture Was provided batchwise to a reactor and cooled. The formation of crystals Was obserVed and once the grain size of the mixture has increased the reactor is stopped, and the mixture Was poured into silicone moulds. The moulds Were freeze dried under Vacuum to form the solid foams. Optionally, the freeze-dried foams Were baked in an oVen at a temperature of from about 60 °C to about 80 °C for 24 - 48 hours.
Chemísorptíon performance The VOC chemisorption performance of the foams prepared With different concentrations of silica and PEI Were compared to the VOC adsorption properties of other materials. The chemisorption performance Was measured by placing a volume of the respective liquid in a chamber together With the porous material. The chamber Was sealed at room-temperature for 29 days to achieve 100% saturation.
Acetic Forrnic Acetaldehyde Forrnaldehyde Water acid acid [Gadsorbate / [Gadsorbate / [Gadsorbate / [Gadsorbate / [Gadsorbate / Gadsorbent] Gadsorbent] Gadsorbent] Gadsorbent] Gadsorbent] Awvated 0.43 0.56 0.42 0.42 _ Carbon Bare silica 0.43 0.73 0.31 0.19 - Cellumse 0.23 0.88 0.07 0.24 0.12 foam Material comprising PEI : silica : cellulose final composition % dry Wei ht) 30:56:44 3.25 5.90 34.09 0.94 0.39 10:72:18 1.00 2.73 11.93 0.36 0.24 30:35:35 2.01 3.13 23.06 0.79 0.23 10:45:45 0.85 2.04 8.62 0.32 0.18 30:17.5:52.5 1.76 3.13 13.25 0.55 0.21 10:22.5:67.5 0.57 1.51 6.15 0.33 0.15 30:7:63 1.66 2.59 14.37 0.55 0.25 10:9:81 0.66 1.49 5.46 0.22 0.13 Comparative examples excluding either silica or PEI) 0:25:75 0.19 0.82 0.11 0.24 0.10 30:0:70 1.30 2.75 10.39 0.46 0.18 10:0:90 0.50 1.23 3.77 0.34 0.12 As can be seen, the performance of the foams comprising cellulose, PEI and silica Was improved With respect to activated carbon, bare silica and cellulose alone.
Compositions comprising more than 10% silica, and more than 10% PEI displayed improved adsorption performance. Compositions comprising more than 50% cellulose, such as from about 52.5% to about 67.5% displayed improved physical properties.
Although, the present invention has been described above With reference to specific embodiments, it is not intended to be limited to the specific forrn set forth herein. Rather, the invention is limited only by the accompanying claims.
In the claims, the terrn "comprises/comprising" does not exclude the presence of other elements or steps. Additionally, although individual features may be included in different claims, these may possibly advantageously be combined, and the inclusion in different claims does not imply that a combination of features is not feasible and/or advantageous. In addition, singular references do not exclude a plurality. The terms "a", "an", "f1rst", "second" etc do not preclude a plurality. Reference signs in the claims are provided merely as a clarifying example and shall not be construed as limiting the scope of the claims in any Way.
Claims (1)
1.CLAIMS 1.A porous material for adsorbing Volatile organic compounds, VOCs, Wherein the porous material is a solid dry porous material comprising a f1brous matrix of cellulose and inorganic carrier particles, and Wherein an organic amine is attached to at least the inorganic carrier particles. 2.The porous material according to claim 1, Wherein the porous material comprises cellulose in an amount of at least 10 Weight % based on the total dry Weight of the material. 3.The porous material according to claim 2, Wherein the porous material comprises cellulose in an amount of from about 10 Weight % to about 70 Weight % based on the total dry Weight of the material. 4.The porous material according to any of claims 1 to 3, Wherein the porous material has a density less than 1 g/cm3, such as from about 0.01 g/cm3 to about 0.5 g/cm 5.The porous material according to any of claims 1 to 4, Wherein the organic amine is polyethylenimine. 6.The porous material according to any of any of claims 1 to 5, Wherein the inorganic carrier particles are silica particles. 7.The porous material according to any of claims 1 to 6, Wherein the cellulose and the inorganic carrier particles are provided at a ratio of about between 3:1 to about 1: 8.The porous material according to any of claims 1 to 7, Wherein the porous material comprises a cross-linking agent, Wherein the cross-linking agent fixes the organic amine Within the porous material. 9. 5 12. 15 13.A method for adsorbing VOCs comprising: - providing a porous material comprising inorganic carrier particles, an organic amine attached to at least the inorganic carrier particles and cellulose, and - submitting the porous material to an environment comprising at least one VOC. The method for adsorbing VOCs according to claim 8, Wherein the porous material is a solid dry porous material comprising a f1brous matrix of cellulose and inorganic carrier particles. The method for adsorbing VOCs according to claim 9, Wherein the porous material comprises cellulose in an amount of at least 10 Weight %, such as from about 10 Weight % to about 70 Weight % Weight based on the dry Weight of the material. An air filter, Wound care article, sanitary article, or packaging insert comprising the porous material according to any of claims 1 to A method for producing a porous material for adsorbing VOCs, the method comprising: - providing cellulose and an organic amine to an aqueous solution to form an aqueous mixture of cellulose and organic amine, - providing inorganic carrier particles to the mixture, - cooling and dehydrating the mixture to form a solid porous material. The method according to claim 13, Wherein the cellulose is provided at an amount of such that the resulting solid porous material comprises at leastWeight % cellulose based on the total dry Weight of the material.
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| SE2251142A SE2251142A1 (en) | 2022-10-03 | 2022-10-03 | Adsorbent material |
| PCT/SE2023/050964 WO2024076279A1 (en) | 2022-10-03 | 2023-09-29 | Porous adsorbent material for gaseous pollutants |
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| WO2020186979A1 (en) * | 2019-03-20 | 2020-09-24 | 深圳市康风环境科技发展有限公司 | Protective tool, sterilising and disinfecting composite sheet material, and manufacturing method therefor |
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| EP3319998B1 (en) * | 2015-07-10 | 2023-08-16 | Climeworks AG | Amine-functionalized fibrillated cellulose for co2 adsorption and methods for making same |
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| CN105617442B (en) * | 2016-03-01 | 2019-02-19 | 苏州市贝克生物科技有限公司 | Adhesive bandage adhesive and preparation method thereof |
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