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Sedighi Moghaddam, MaziarORCID iD iconorcid.org/0000-0002-2614-1245
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Publikationer (10 of 18) Visa alla publikationer
Yin, H., Ringman, R., Sedighi Moghaddam, M., Tuominen, M., Dėdinaitė, A., Wålinder, M., . . . Bardage, S. (2023). Susceptibility of surface-modified superhydrophobic wood and acetylated wood to mold and blue stain fungi. Progress in organic coatings, 182, Article ID 107628.
Öppna denna publikation i ny flik eller fönster >>Susceptibility of surface-modified superhydrophobic wood and acetylated wood to mold and blue stain fungi
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2023 (Engelska)Ingår i: Progress in organic coatings, ISSN 0300-9440, E-ISSN 1873-331X, Vol. 182, artikel-id 107628Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The susceptibility of surface-modified wood, surface-modified acetylated wood and acetylated wood to mold and blue stain fungi was investigated. The surface modifications were based on fluorinated and non-fluorinated silicone nanofilaments for increased hydrophobicity. Results showed an increased mold resistance of the surface-modified superhydrophobic wood with mold appearing later or with less intensity on the modified surfaces than on the untreated wood in accelerated mold chamber tests due to the increased water resistance of the samples. All acetylated wood samples exhibited good mold resistance as the available water in acetylated wood was reduced. The surface modifications on acetylated wood had a slightly negative effect on mold resistance due to side effects from the modification. The surface-modified wood showed high blue stain fungi coverage, whereas almost no blue stain fungi were observed on the acetylated wood and surface-modified acetylated wood. The surface-modified superhydrophobic wood showed high mold coverage after conditioning in a high-humidity environment or after exposure to UV irradiation. Meanwhile, the acetylated wood and surface-modified superhydrophobic acetylated wood showed a small amount of mold coverage in these conditions. © 2023 The Authors

Ort, förlag, år, upplaga, sidor
Elsevier B.V., 2023
Nyckelord
Acetylated wood, Blue stain, Mold, Silicone nanofilaments, Superhydrophobic surface modifications, Fungi, Hydrophobicity, Irradiation, Molds, Nanostructures, Surface properties, Wood, Nanofilaments, Silicone nanofilament, Stain fungi, Super-hydrophobic surfaces, Superhydrophobic, Superhydrophobic surface modification, Surface-modification, Surface-modified, Silicones
Nationell ämneskategori
Trävetenskap
Identifikatorer
urn:nbn:se:ri:diva-64384 (URN)10.1016/j.porgcoat.2023.107628 (DOI)2-s2.0-85153096634 (Scopus ID)
Anmärkning

Correspondence Address: Bardage, S.; RISE Research Institutes of Sweden, Sweden; email: stig.bardage@ri.se; Funding details: 2016-01362; Funding details: 2017-02712; Funding details: Karlstads universitet, KAU; Funding text 1: This work was supported by the Formas research council [grant no. 2016-01362 ] and the Vinnova project [grant no. 2017-02712 ]. AS is a researcher at Pro2BE at Karlstad University, the research environment for Processes and Products for a circular Biobased Economy.; Funding text 2: This work was supported by the Formas research council [grant no. 2016-01362] and the Vinnova project [grant no. 2017-02712]. AS is a researcher at Pro2BE at Karlstad University, the research environment for Processes and Products for a circular Biobased Economy.

Tillgänglig från: 2023-05-05 Skapad: 2023-05-05 Senast uppdaterad: 2023-06-08Bibliografiskt granskad
Žigon, J., Sedighi Moghaddam, M. & Wålinder, M. E. (2023). Wettability and surface interactions of natural and thermally modified beech wood with water and water-based coatings: the effect of surface pre-treatment type. European Journal of Wood and Wood Products, 81, 73
Öppna denna publikation i ny flik eller fönster >>Wettability and surface interactions of natural and thermally modified beech wood with water and water-based coatings: the effect of surface pre-treatment type
2023 (Engelska)Ingår i: European Journal of Wood and Wood Products, ISSN 0018-3768, E-ISSN 1436-736X, Vol. 81, s. 73-Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Proper surface pre-treatment plays an important role for good compatibility between the wood and the coating. The present study aimed to determine the correlations between the type of surface pre-treatment and the wettability for unmodified and thermally modified beech (Fagus sylvatica L.) wood with water and water-based coatings. A new approach to evaluate the water permeability of coating systems was developed by investigating the wettability of wood samples using the multicycle Wilhelmy plate method in combination with immersion of the coated samples in water. The treatment with non-thermal plasma made the wood surfaces more hydrophilic and treatment with organic solvent made the surfaces more hydrophobic. The poorer wettability and sorption with water and coatings in thermally modified wood was clearly related to the altered chemical composition of wood. As the water content in coating increased, the amount of absorbed coating in the wood decreased. The surface pre-treatments had no effect on the colour of the coated wood. The higher water content in the coating negatively affected the water protection performance of the coated wood. The thinner coating films correlated with greater water absorption in the coated wood, generally resulting in microscopic delamination between the wood substrate and the coating films. © 2022, The Author(s)

Ort, förlag, år, upplaga, sidor
Springer Science and Business Media Deutschland GmbH, 2023
Nyckelord
Coatings, Surface treatment, Water absorption, Water treatment, Wetting, Beech (Fagus sylvatica L.), Beech wood, Coating system, Good compatibility, New approaches, Surface interactions, Surface pre-treatments, Water permeability, Water-based coating, Wood samples, Wood
Nationell ämneskategori
Ekologi
Identifikatorer
urn:nbn:se:ri:diva-60156 (URN)10.1007/s00107-022-01875-7 (DOI)2-s2.0-85137464656 (Scopus ID)
Anmärkning

Funding details: Javna Agencija za Raziskovalno Dejavnost RS, ARRS, P4-0015, P4-0430; Funding text 1: The authors acknowledge the financial support from the Slovenian Research Agency (research programs funding No. P4-0015, ‘‘Wood and lignocellulose composites’’ and No. P4-0430, “Forest-wood value chain and climate change: transition to circular bioeconomy”). The help of Dr. Janez Kovač from Josef Stefan Institute, Ljubljana, Slovenia, for his help with the XPS analysis is gratefully acknowledged. The corresponding author acknowledges Haiyan Yin from RISE Research Institutes of Sweden for her valuable assistance in interpreting the wettability data.

Tillgänglig från: 2022-09-29 Skapad: 2022-09-29 Senast uppdaterad: 2023-07-06Bibliografiskt granskad
Yin, H., Sedighi Moghaddam, M., Tuominen, M., Dėdinaitė, A., Wålinder, M. & Swerin, A. (2022). Wettability performance and physicochemical properties of UV exposed superhydrophobized birch wood. Applied Surface Science, 584, Article ID 152528.
Öppna denna publikation i ny flik eller fönster >>Wettability performance and physicochemical properties of UV exposed superhydrophobized birch wood
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2022 (Engelska)Ingår i: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 584, artikel-id 152528Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The effect of prolonged ultraviolet (UV) irradiation on the performance of superhydrophobized birch and acetylated birch wood was investigated. The surface modification of the wood was based on a newly developed method using silicone nanofilaments. The combination of surface modification and acetylation of wood showed good wetting resistance also after 600 h of UV exposure, with water contact angles greater than 140° and water uptake 30 times lower by weight than that of the non-surface-modified wood as determined by multicycle Wilhelmy plate measurements. Scanning electron microscopy images revealed that the silicone nanofilaments can still be observed on the wood samples after UV irradiation. The surface-modified wood samples exhibited significant color change after UV exposure. FTIR spectra showed that lignin was degraded on both the non-surface-modified wood surfaces and the wood surface-modified with the silicone nanofilaments. © 2022 The Authors

Ort, förlag, år, upplaga, sidor
Elsevier B.V., 2022
Nyckelord
Acetylated wood, Lignin degradation, Superhydrophobicity, Surface modification, UV irradiation, Wettability, Acetylation, Hydrophobicity, Irradiation, Lignin, Physicochemical properties, Scanning electron microscopy, Silicones, Surface treatment, Wetting, Wood products, Birch wood, Modified wood, Nanofilaments, Surface-modification, Surface-modified, Ultraviolet exposure, Ultraviolet irradiations, Wood samples, Fourier transform infrared spectroscopy, Polysilicones, Radiation Effects, Water Repellence
Nationell ämneskategori
Trävetenskap
Identifikatorer
urn:nbn:se:ri:diva-58496 (URN)10.1016/j.apsusc.2022.152528 (DOI)2-s2.0-85123687684 (Scopus ID)
Anmärkning

 Funding details: 2016-01362; Funding details: 2017-02712; Funding details: Karlstads universitet, KAU; Funding text 1: This work was supported by the Formas research council [grant no. 2016-01362] and the Vinnova project [grant no. 2017-02712]. AS is a researcher at Pro2BE at Karlstad University, the research environment for Processes and Products for a circular Biobased Economy.; Funding text 2: This work was supported by the Formas research council [grant no. 2016-01362] and the Vinnova project [grant no. 2017-02712]. AS is a researcher at Pro2BE at Karlstad University, the research environment for Processes and Products for a circular Biobased Economy.

Tillgänglig från: 2022-02-18 Skapad: 2022-02-18 Senast uppdaterad: 2023-05-17Bibliografiskt granskad
Yin, H., Sedighi Moghaddam, M., Tuominen, M., Dėdinaitė, A., Wålinder, M. & Swerin, A. (2021). Non-fluorine surface modification of acetylated birch for improved water repellence. Holzforschung, 75(9), 857
Öppna denna publikation i ny flik eller fönster >>Non-fluorine surface modification of acetylated birch for improved water repellence
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2021 (Engelska)Ingår i: Holzforschung, ISSN 0018-3830, E-ISSN 1437-434X, Vol. 75, nr 9, s. 857-Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

In this work, a non-fluorinated surface treatment, i.e., hydrophobized silicone nanofilaments, was applied on both birch and acetylated birch wood samples via a gas-phase based reaction. A superhydrophobic behavior was observed on both the surface-modified samples as revealed by the static water contact angles (CAs) greater than 160°, also valid for samples prepared with the shortest reaction time of 1 h. The dynamic wettability behavior of the samples was studied by a multicycle Wilhelmy plate method. The surface-modified acetylated birch exhibited a pronounced enhanced water resistance, resulting in very low water uptake of 3 ± 1 wt% after 100 cycles, which was not only about 29 and 5 times lower than that of the non-surface-modified birch and acetylated birch, respectively, but also three times lower than that of the surface-modified birch. Moreover, the aesthetic appearance of the acetylated wood was maintained as the surface modification only resulted in a small color change. This work shows the potential of preparing super water-repellent wood by non-fluorinated surface modification. 

Ort, förlag, år, upplaga, sidor
De Gruyter Open Ltd, 2021
Nyckelord
Acetylated wood, Multicycle Wilhelmy plate method, Non-fluorine surface modification, Silicone nanofilaments, Superhydrophobic coating, Fluorine, Silicones, Superhydrophobicity, Dynamic wettabilities, Fluorinated surface, Superhydrophobic behavior, Surface-modified, Surface-modified samples, Water repellence, Water repellents, Water-resistances, Surface treatment
Nationell ämneskategori
Trävetenskap
Identifikatorer
urn:nbn:se:ri:diva-53030 (URN)10.1515/hf-2020-0236 (DOI)2-s2.0-85104404837 (Scopus ID)
Anmärkning

 Funding details: 2016-01362; Funding details: VINNOVA, 2017-02712; Funding text 1: Research funding: Formas research council is acknowledged for funding the project “Durable water-, oil- and soil repellent wood for outdoor applications via smart surface modification”, grant no. 2016-01362. The Vinnova project 2017-02712 “Bärande utomhusträ” within the BioInnovation program is also acknowledged for supporting the project.

Tillgänglig från: 2021-05-25 Skapad: 2021-05-25 Senast uppdaterad: 2023-05-17Bibliografiskt granskad
Yin, H., Sedighi Moghaddam, M., Tuominen, M., Eriksson, M., Järn, M., Dėdinaitė, A., . . . Swerin, A. (2020). Superamphiphobic plastrons on wood and their effects on liquid repellence. Materials & design, 195, Article ID 108974.
Öppna denna publikation i ny flik eller fönster >>Superamphiphobic plastrons on wood and their effects on liquid repellence
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2020 (Engelska)Ingår i: Materials & design, ISSN 0264-1275, E-ISSN 1873-4197, Vol. 195, artikel-id 108974Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The increasing utilization of wood-based products raises new demands for improved durability, for example an enhanced liquid repellence. Superhydrophobic or superamphiphobic surfaces have been widely fabricated. Less attention has been paid to such modifications on wood and the changes of its hygroscopic or solvoscopic properties. In this work, wood veneers were surface modified by hydrophobized silicone nanofilaments. Results revealed that the surface-modified wood showed a superamphiphobic behavior, i.e. it repelled water, ethylene glycol and hexadecane with contact angles greater than 150° and roll-off angles of less than 10°. Most importantly, a plastron effect was observed when the surface-modified wood was submerged in water, ethylene glycol or hexadecane, which reduced the liquid sorption rate and extent to various degrees. By comparing the measured permeabilities and the estimated diffusive mass flux and supported by Hansen solubility parameters and the degrees of swelling, it is concluded that diffusion is the major cause for the liquid uptake in the surface-modified wood. Moreover, the interaction between the liquid and the modified layer (the solubility of the liquid in the modified layer) also needs to be considered, especially in hexadecane. © 2020 The Authors

Ort, förlag, år, upplaga, sidor
Elsevier Ltd, 2020
Nyckelord
Diffusion, Plastron, Silicone nanofilaments, Superamphiphobicity, Surface modification, Wood, Ethylene, Ethylene glycol, Liquids, Paraffins, Polyols, Silicones, Solubility, Superhydrophobicity, Swelling, Hansen solubility parameters, Liquid sorption, Liquid uptake, Modified layer, Nanofilaments, Roll-off angles, Surface-modified, Wood-based products
Nationell ämneskategori
Naturvetenskap
Identifikatorer
urn:nbn:se:ri:diva-45609 (URN)10.1016/j.matdes.2020.108974 (DOI)2-s2.0-85088095378 (Scopus ID)
Anmärkning

Funding details: 2016-01362; Funding details: 898/16; Funding details: Kungliga Tekniska Högskolan, KTH; Funding text 1: This work was supported by the Nils and Dorthi Troëdsson Foundation for Scientific Research [grant no. 898/16 ] and Formas research council [grant no. 2016-01362 ].; Funding text 2: The Nils and Dorthi Troëdsson Foundation for Scientific Research is thanked for supporting AS's adjunct professorship at KTH. Martin Andersson and Jens Sommertune at RISE Research Institutes of Sweden are thanked for guiding the calculations of Hansen solubility parameters.

Tillgänglig från: 2020-08-14 Skapad: 2020-08-14 Senast uppdaterad: 2023-05-25Bibliografiskt granskad
Vaziri, M., Karlsson, O., Abrahamsson, L., Sedighi Moghaddam, M. & Sandberg, D. (2020). Wettability of welded wood-joints investigated by the Wilhelmy method: Part 2. Effect of wollastonite additive. Holzforschung, 75(1)
Öppna denna publikation i ny flik eller fönster >>Wettability of welded wood-joints investigated by the Wilhelmy method: Part 2. Effect of wollastonite additive
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2020 (Engelska)Ingår i: Holzforschung, ISSN 0018-3830, E-ISSN 1437-434X, Vol. 75, nr 1Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The effect of wollastonite on the wetting properties of welded Scots pine-joints was studied using the multicycle Wilhelmy plate method and by observation of the chemical composition of the welded joints. Welding pine with wollastonite for 5 s resulted in a decrease in the water uptake and the swelling, and an increase in the contact angle of the welded joint compared to welded wood without wollastonite. High-performance liquid chromatography and gas chromatography/mass spectrometry showed the presence of dehydration products such as furfural, 5-hydroxymethylfurfural, and levoglucosan in methanol extracts from welded joints of specimens welded with and without wollastonite. Phenols were also found by analysis using the Folin-Ciocalteu method and High-performance liquid chromatography. The importance of such compounds in relation to the wetting properties of the welded joint is discussed.

Ort, förlag, år, upplaga, sidor
De Gruyter, 2020
Nyckelord
apparent contact angle (CA), gas chromatography/mass spectrometry (GC/MS), high-performance liquid chromatography (HPLC), liquid sorption, pine, swelling, welding time, Contact angle, Forestry, Gas chromatography, High performance liquid chromatography, Silicate minerals, Welds, Wetting, 5 hydroxymethyl furfurals, Chemical compositions, Gas chromatography/Mass spectrometry, Methanol extract, Welded woods, Wetting property, Wilhelmy methods, Wilhelmy plate, Welding
Nationell ämneskategori
Naturvetenskap
Identifikatorer
urn:nbn:se:ri:diva-46829 (URN)10.1515/hf-2019-0310 (DOI)2-s2.0-85089107202 (Scopus ID)
Anmärkning

Funding details: Svenska ForskningsrÃ¥det Formas; Funding text 1: Research funding: Financial support from the Swedish Research Council for Environment, Agricultural Sciences and Spatial Planning (FORMAS), project Wood Welding –“Glue-free Wood Assembly 2017-01157”, is gratefully acknowledged.

Tillgänglig från: 2020-08-24 Skapad: 2020-08-24 Senast uppdaterad: 2023-03-30Bibliografiskt granskad
Källbom, S., Sedighi Moghaddam, M. & Wålinder, M. E. P. (2018). Liquid sorption, swelling and surface energy properties of unmodified and thermally modified Scots pine heartwood after extraction. Holzforschung, 72(3)
Öppna denna publikation i ny flik eller fönster >>Liquid sorption, swelling and surface energy properties of unmodified and thermally modified Scots pine heartwood after extraction
2018 (Engelska)Ingår i: Holzforschung, ISSN 0018-3830, E-ISSN 1437-434X, Vol. 72, nr 3Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The effect of extractives removal on liquid sorption, swelling and surface energy properties of unmodified wood (UW) and thermally modified Scots pine heartwood (hW) (TMW) was studied. The extraction was performed by a Soxtec procedure with a series of solvents and the results were observed by the multicycle Wilhelmy plate method, inverse gas chromatography (IGC) and Fourier transform infrared (FTIR) spectroscopy. A significantly lower rate of water uptake was found for the extracted UW, compared with the unextracted one. This is due to a contamination effect in the latter case from water-soluble extractives increasing the capillary flow into the wood voids, proven by the decreased water surface tension. The swelling in water increased after extraction 1.7 and 3 times in the cases of UW and TMW, respectively. The dispersive part of the surface energy was lower for the extracted TMW compared to the other sample groups, indicating an almost complete removal of the extractives. The FTIR spectra of the extracts showed the presence of phenolic compounds but also resin acids and aliphatic compounds.

Nyckelord
extractives, FTIR, inverse gas chromatography (IGC), liquid sorption, multicycle Wilhelmy plate method, Scots pine, surface energy, swelling, thermally modified wood, Binary alloys, Chromatography, Forestry, Fourier series, Fourier transform infrared spectroscopy, Gas chromatography, Interfacial energy, Inverse problems, Liquid chromatography, Liquids, Sorption, Wood products, Inverse gas chromatography, Wilhelmy plate, Extraction
Nationell ämneskategori
Naturvetenskap
Identifikatorer
urn:nbn:se:ri:diva-33160 (URN)10.1515/hf-2017-0064 (DOI)2-s2.0-85037846034 (Scopus ID)
Tillgänglig från: 2018-01-26 Skapad: 2018-01-26 Senast uppdaterad: 2023-04-04Bibliografiskt granskad
Reverdy, C., Belgacem, N., Sedighi Moghaddam, M., Sundin, M., Swerin, A. & Bras, J. (2018). One-step superhydrophobic coating using hydrophobized cellulose nanofibrils. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 544, 152-158
Öppna denna publikation i ny flik eller fönster >>One-step superhydrophobic coating using hydrophobized cellulose nanofibrils
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2018 (Engelska)Ingår i: Colloids and Surfaces A: Physicochemical and Engineering Aspects, ISSN 0927-7757, E-ISSN 1873-4359, Vol. 544, s. 152-158Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Superhydrophobic surfaces have high potential in self-cleaning and anti-fouling applications. We developed a one-step superhydrophobic coating formulation containing sodium oleate (NaOl), hydrophobized precipitated calcium carbonate and biobased cellulose nanofibrils (CNFs) hydrophobized with either alkyl ketene dimer (AKD) or amino propyl trimethoxy silane (APMS) as a binder to fix and distribute the particles. Coatings were made on paperboard and the wetting behavior of the surface was assessed. Static, advancing and receding contact angles with water as well as roll-off and water shedding angle were compared to coatings made with styrene butadiene latex as binder instead of CNFs. Modifications with alkyl ketene dimer showed most promising results for a viable process in achieving superhydrophobic paperboard but required reformulation of the coating with optimized and reduced amount of NaOl to avoid surfactant-induced wetting via excess NaOl. A static water contact angle of 150° was reached for the CNF-AKD. The use of CNFs enables the improvement of coating quality avoiding cracking with the use of nanocellulose as a renewable binder.

Nyckelord
Cellulose nanofibrils, Paperboard, Superhydrophobicity, Binders, Bins, Calcium carbonate, Cellulose, Coatings, Contact angle, Nanofibers, Paperboards, Sodium Carbonate, Styrene, Wetting, Advancing and receding contact angles, Cellulose nanofibrils (CNFs), Precipitated calcium carbonate, Styrene butadiene latices, Super-hydrophobic surfaces, Superhydrophobic coatings, Hydrophobicity, 1, 3 butadiene, dimer, ketene derivative, latex, nanofiber, oleate sodium, silane derivative, surfactant, water, Article, chemical modification, material coating, priority journal, scanning electron microscopy, water absorption, Cellulose Fibers, Coating, Crazing, Dimers, Sodium Compounds
Nationell ämneskategori
Naturvetenskap
Identifikatorer
urn:nbn:se:ri:diva-33423 (URN)10.1016/j.colsurfa.2017.12.059 (DOI)2-s2.0-85042307822 (Scopus ID)
Anmärkning

Funding details: ANR-16-CARN-0025-01, Association Instituts Carnot; Funding details: ANR-11-LABX-0030, Labex; Funding details: COST, European Cooperation in Science and Technology; Funding details: AIR, American Institutes for Research; Funding details: Stiftelsen Nils och Dorthi Troëdssons Forskningsfond;

Tillgänglig från: 2018-03-09 Skapad: 2018-03-09 Senast uppdaterad: 2024-03-25Bibliografiskt granskad
Sedighi Moghaddam, M., Van den Bulcke, J., Wålinder, M. E. P., Claesson, P. M., Van Acker, J. & Swerin, A. (2017). Microstructure of chemically modified wood using X-ray computed tomography in relation to wetting properties. Holzforschung, 71(2), 119-128
Öppna denna publikation i ny flik eller fönster >>Microstructure of chemically modified wood using X-ray computed tomography in relation to wetting properties
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2017 (Engelska)Ingår i: Holzforschung, ISSN 0018-3830, E-ISSN 1437-434X, Vol. 71, nr 2, s. 119-128Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

X-ray computed tomography (XCT) was utilized to visualize and quantify the 2D and 3D microstructure of acetylated southern yellow pine (pine) and maple, as well as furfurylated pine samples. The total porosity and the porosity of different cell types, as well as cell wall thickness and maximum opening of tracheid lumens were evaluated. The wetting properties (swelling and capillary uptake) were related to these microstructural characteristics. The data show significant changes in the wood structure for furfurylated pine sapwood samples, including a change in tracheid shape and filling of tracheids by furan polymer. In contrast, no such changes were noted for the acetylated pine samples at the high resolution of 0.8

Ort, förlag, år, upplaga, sidor
Walter de Gruyter, 2017
Nyckelord
acetylation, cell wall thickness, furfurylation, hardwood, microstructure, porosity, softwood, sub-micron X-ray computed tomography, tracheid, wettability
Nationell ämneskategori
Trävetenskap Fysikalisk kemi
Identifikatorer
urn:nbn:se:ri:diva-27771 (URN)10.1515/hf-2015-0227 (DOI)2-s2.0-85011867252 (Scopus ID)
Tillgänglig från: 2017-01-07 Skapad: 2017-01-07 Senast uppdaterad: 2023-04-04Bibliografiskt granskad
Sedighi Moghaddam, M., Heydari, G., Tuominen, M., Fielden, M., Haapanen, J., Mäkelä, J. M., . . . Swerin, A. (2016). Hydrophobisation of wood surfaces by combining liquid flame spray (LFS) and plasma treatment: Dynamic wetting properties. Holzforschung, 70(6), 527-537
Öppna denna publikation i ny flik eller fönster >>Hydrophobisation of wood surfaces by combining liquid flame spray (LFS) and plasma treatment: Dynamic wetting properties
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2016 (Engelska)Ingår i: Holzforschung, ISSN 0018-3830, E-ISSN 1437-434X, Vol. 70, nr 6, s. 527-537Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The hydrophilic nature of wood surfaces is a major cause for water uptake and subsequent biological degradation and dimensional changes. In the present paper, a thin transparent superhydrophobic layer on pine veneer surfaces has been created for controlling surface wettability and water repellency. This effect was achieved by means of the liquid flame spray (LFS) technique, in the course of which the nanoparticulate titanium dioxide (TiO2) was brought to the surface, followed by plasma polymerisation. Plasma polymerised perfluorohexane (PFH) or hexamethyldisiloxane (HMDSO) were then deposited onto the LFS-treated wood surfaces. The same treatment systems were applied to silicon wafers so as to have well-defined reference surfaces. The dynamic wettability was studied by the multicycle Wilhelmy plate (mWP) method, resulting in advancing and receding contact angles as well as sorption behavior of the samples during repeated wetting cycles in water. Atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS) were employed to characterise the topography and surface chemical compositions and to elucidate the question how the morphology of the nanoparticles and plasma affect the wetting behavior. A multi-scale roughness (micro-nano roughness) was found and this enhanced the forced wetting durability via a superhydrophobic effect on the surface, which was stable even after repeated wetting cycles. The hydrophobic effect of this approach was higher compared to that of plasma modified surfaces with their micro-scale modification.

Ort, förlag, år, upplaga, sidor
Walter de Gruyter, 2016
Nyckelord
cold plasma, contact angle (CA), dynamic wetting, hexamethyldisiloxane (HMDSO), hydrophobisation, liquid flame spray (LFS), multi-scale roughness, nano-sized metal oxide (TiO2), perfluorohexane (PFH), plasma polymerisation, superhydrophobicity, Wilhelmy plate method, wood
Nationell ämneskategori
Pappers-, massa- och fiberteknik Materialkemi Bearbetnings-, yt- och fogningsteknik
Identifikatorer
urn:nbn:se:ri:diva-898 (URN)10.1515/hf-2015-0148 (DOI)2-s2.0-84973442118 (Scopus ID)
Tillgänglig från: 2016-08-31 Skapad: 2016-08-31 Senast uppdaterad: 2023-04-04Bibliografiskt granskad
Organisationer
Identifikatorer
ORCID-id: ORCID iD iconorcid.org/0000-0002-2614-1245

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