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Lin, C.-F., Myronycheva, O., Karlsson, O., Jones, D. & Sandberg, D. (2023). A new wood-modification process based on grafted urethane groups: Durability of carbamated Scots pine (Pinus sylvestris L.) wood.. In: C. Crestini; H. Lange; M. Gigli; M. Sgarzi (Ed.), 21st ISWFPC Conference Proceedings: Vol. II Poster presentations. Paper presented at 21st International Symposium on Wood, Fiber and Pulping Chemistry (ISWFPC 2023), Venice, Italy, June 4–7, 2023 (pp. 78-81). Ca’ Foscari University of Venice, Department of Molecular Sciences and Nanosystems,, 2
Open this publication in new window or tab >>A new wood-modification process based on grafted urethane groups: Durability of carbamated Scots pine (Pinus sylvestris L.) wood.
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2023 (English)In: 21st ISWFPC Conference Proceedings: Vol. II Poster presentations / [ed] C. Crestini; H. Lange; M. Gigli; M. Sgarzi, Ca’ Foscari University of Venice, Department of Molecular Sciences and Nanosystems, , 2023, Vol. 2, p. 78-81Conference paper, Poster (with or without abstract) (Refereed)
Place, publisher, year, edition, pages
Ca’ Foscari University of Venice, Department of Molecular Sciences and Nanosystems,, 2023
National Category
Wood Science
Research subject
Wood Science and Engineering
Identifiers
urn:nbn:se:ltu:diva-103166 (URN)
Conference
21st International Symposium on Wood, Fiber and Pulping Chemistry (ISWFPC 2023), Venice, Italy, June 4–7, 2023
Projects
Advanced research supporting the forestry and wood-processing sector’s adaptation to global change and the 4th industrial revolutionBiobased fire protection of wood panel for exterior conditions by using phosphorylated lignin from wheat straw
Funder
Swedish Research Council Formas, 2021-00818
Note

Funder: OP RDE (CZ.02.1.01/0.0/0.0/16_019/0000803); CT WOOD; Swedish wood industry

ISBN for host publication: 9788831461580

Available from: 2023-12-01 Created: 2023-12-01 Last updated: 2023-12-21Bibliographically approved
Lin, C.-f., Myronycheva, O., Karlsson, O., Mantanis, G. I., Jones, D. & Sandberg, D. (2023). A new wood-modification process based on in situ grafting of urethane groups: biological resistance and dimensional stability of carbamylated Scots pine wood. Wood Material Science & Engineering, 18(3), 1160-1162
Open this publication in new window or tab >>A new wood-modification process based on in situ grafting of urethane groups: biological resistance and dimensional stability of carbamylated Scots pine wood
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2023 (English)In: Wood Material Science & Engineering, ISSN 1748-0272, E-ISSN 1748-0280, Vol. 18, no 3, p. 1160-1162Article in journal (Refereed) Published
Abstract [en]

Chemical modification of wood typically requires the impregnation of wood with reactive compounds capable of undergoing covalent bonding to functional groups present in the cell wall. Creating such reactive agents in situ, with the use of low-priced chemicals, would prove more attractive for commercial applications. In this study, Scots pine (Pinus sylvestris L.) sapwood was impregnated with an aqueous solution of urea (30%), dried at 40°C for 24 h, and subsequently heat treated in an oven at 150°C for 24 h to produce the reactive isocyanic acid. By using accelerated fungal tests under laboratory conditions, provisional tests demonstrated a high biological resistance against selected moulds and rots. Migration of urea into the wood structure and grafting to its polymers during subsequent heat treatment, led to a bulked cell wall and enhanced resistance to water swelling, even after cycling water treatments. The bending strength (MOR) of modified pine wood was reduced by the treatment applied, while its modulus of elasticity (MOE) remained unchanged.

Place, publisher, year, edition, pages
Taylor & Francis, 2023
Keywords
Biological durability, distortion, sawn timber, thermal modified timber, Wood protection
National Category
Wood Science Composite Science and Engineering
Research subject
Wood Science and Engineering
Identifiers
urn:nbn:se:ltu:diva-97268 (URN)10.1080/17480272.2023.2207541 (DOI)000991623500001 ()2-s2.0-85159810327 (Scopus ID)
Projects
Biobased fire protection of wood panel for exterior conditions by using phosphorylated lignin from wheat straw
Funder
Luleå University of Technology, CT-WOODSwedish Research CouncilSwedish Research Council Formas, 2021-00818
Note

Validerad;2023;Nivå 2;2023-06-30 (joosat);

Licens fulltext: CC BY-NC-ND License

Available from: 2023-05-22 Created: 2023-05-22 Last updated: 2023-06-30Bibliographically approved
Lin, C.-F., Scharf, A., Karlsson, O., Sandberg, D. & Jones, D. (2023). Biobased adesive derived from citric acid and sorbitrol for wood-composite manufacture.. In: Morwenna Spear, Simon Curling, Athanasious Dimitriou, Rob Elias, Ceri Loxton (Ed.), Proceedings of the International Panel Production Symposium 2023: . Paper presented at International Panel Production Symposium 2023 (IPPS23), Llandudno, Wales, United Kingdom, October 3-4, 2023 (pp. 183-187). The BioComposite Centre, Bangor University, UK
Open this publication in new window or tab >>Biobased adesive derived from citric acid and sorbitrol for wood-composite manufacture.
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2023 (English)In: Proceedings of the International Panel Production Symposium 2023 / [ed] Morwenna Spear, Simon Curling, Athanasious Dimitriou, Rob Elias, Ceri Loxton, The BioComposite Centre, Bangor University, UK , 2023, p. 183-187Conference paper, Oral presentation with published abstract (Refereed)
Place, publisher, year, edition, pages
The BioComposite Centre, Bangor University, UK, 2023
National Category
Wood Science
Research subject
Wood Science and Engineering
Identifiers
urn:nbn:se:ltu:diva-103637 (URN)
Conference
International Panel Production Symposium 2023 (IPPS23), Llandudno, Wales, United Kingdom, October 3-4, 2023
Funder
Swedish Research Council Formas, 2021-00818
Note

Funder: OP RDE (CZ.02.1.01/0.0/0.0/16_019/0000803), CT WOOD

ISBN for host publication: 978-1-84220-200-5

Available from: 2024-01-14 Created: 2024-01-14 Last updated: 2024-01-15Bibliographically approved
Kim, I., Ross, L., Alfredsson, G., Karlsson, O., Jones, D., Mantanis, G. I. & Sandberg, D. (2023). Durability of wood modified with maleic anhydride and sodium hypophosphite.. In: Larnøy, E (Ed.), 19th Annual Meeting of the Northern European Network for Wood Science and Engineering (WSE 2023): 19th Annual Meeting of the Northern European Network for Wood Science and Engineering (WSE 2023), Ås and Oslo, Norway, October 10-12, 2023. Paper presented at 19th Annual Meeting of the Northern European Network for Wood Science and Engineering (WSE 2023), Ås and Oslo, Norway, October 10-12, 2023 (pp. 22-24). Ås: NIBIO
Open this publication in new window or tab >>Durability of wood modified with maleic anhydride and sodium hypophosphite.
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2023 (English)In: 19th Annual Meeting of the Northern European Network for Wood Science and Engineering (WSE 2023): 19th Annual Meeting of the Northern European Network for Wood Science and Engineering (WSE 2023), Ås and Oslo, Norway, October 10-12, 2023 / [ed] Larnøy, E, Ås: NIBIO , 2023, p. 22-24Conference paper, Oral presentation with published abstract (Refereed)
Place, publisher, year, edition, pages
Ås: NIBIO, 2023
National Category
Wood Science
Research subject
Wood Science and Engineering
Identifiers
urn:nbn:se:ltu:diva-103449 (URN)
Conference
19th Annual Meeting of the Northern European Network for Wood Science and Engineering (WSE 2023), Ås and Oslo, Norway, October 10-12, 2023
Available from: 2024-01-02 Created: 2024-01-02 Last updated: 2024-01-12Bibliographically approved
Lin, C.-F., Scharf, A., Karlsson, O., Sandberg, D. & Jones, D. (2023). Fire-retardant phosphorus-containing silica gel modified particleboard. In: Morwenna Spear, Simon Curling, Athanasious Dimitriou, Rob Elias, Ceri Loxton (Ed.), Proceedings of International Panel Production Symposium 2023: . Paper presented at International Panel Production Symposium 2023, (IPPS23), Llandudno, Wales, United Kingdom, October 3-4, 2023 (pp. 177-182). The BioComposite Centre, Bangor University, UK
Open this publication in new window or tab >>Fire-retardant phosphorus-containing silica gel modified particleboard
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2023 (English)In: Proceedings of International Panel Production Symposium 2023 / [ed] Morwenna Spear, Simon Curling, Athanasious Dimitriou, Rob Elias, Ceri Loxton, The BioComposite Centre, Bangor University, UK , 2023, p. 177-182Conference paper, Oral presentation with published abstract (Refereed)
Place, publisher, year, edition, pages
The BioComposite Centre, Bangor University, UK, 2023
National Category
Wood Science
Research subject
Wood Science and Engineering
Identifiers
urn:nbn:se:ltu:diva-103636 (URN)
Conference
International Panel Production Symposium 2023, (IPPS23), Llandudno, Wales, United Kingdom, October 3-4, 2023
Funder
Swedish Research Council Formas, 2021-00818
Note

Funder: Slovak Research and Development Agency (APVV-16-0223); VEGA (VEGA 1/0678/22); KEGA (KEGA 016STU4/2021); OP RDE (CZ.02.1.01/0.0/0.0/16_019/0000803); CT WOOD

ISBN for host publication: 978-1-84220-200-5

Available from: 2024-01-14 Created: 2024-01-14 Last updated: 2024-01-15Bibliographically approved
Poohphajai, F., Myronycheva, O., Karlsson, O., Belt, T., Rautkari, L., Sandak, J., . . . Sandak, A. (2023). Fungal colonisation on wood surfaces weathered at diverse climatic conditions. Heliyon, 9(6), Article ID e17355.
Open this publication in new window or tab >>Fungal colonisation on wood surfaces weathered at diverse climatic conditions
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2023 (English)In: Heliyon, ISSN 2405-8440, Vol. 9, no 6, article id e17355Article in journal (Refereed) Published
Abstract [en]

Natural weathering test at two different European climatic zones were conducted to investigate simultaneously both, the fungal colonisation and weathering process of Scots pine wood (Pinus sylvestris L.). The hypothesis was that the wood performing differently in various climate conditions might affect fungal infestation. The colour changes, wettability, and glossiness were measured as indicators of weathering progress of wood together with an assessment of fungal diversity. Different intensities in weathering, occupancy, and colonisation of fungi on wooden surface were detected. A higher number of fungal species was found on wood exposed to the warm temperate climates compared to subarctic or boreal climates. The dominant fungal species in both locations were from the genera Cladosporium and Aureobasidium.

Place, publisher, year, edition, pages
Elsevier, 2023
Keywords
Fungal infestation, Colonisation rate, Natural weathering, Ascomycetes fungi, Mould, Biofilm formation
National Category
Wood Science Ecology
Research subject
Wood Science and Engineering
Identifiers
urn:nbn:se:ltu:diva-99035 (URN)10.1016/j.heliyon.2023.e17355 (DOI)001035293300001 ()37441395 (PubMedID)2-s2.0-85162159788 (Scopus ID)
Projects
Fingerprinting of Microbial Communities on Contaminated Wooden Surfaces for Further Identification and Differentiation of Fungal Species and StrainsInnoRenew
Funder
The Kempe FoundationsEU, Horizon 2020, 739574)EU, European Research Council, 101044468
Note

Validerad;2023;Nivå 2;2023-08-15 (hanlid);

Funder: Ministry of Education, Science and Sport (MIZS), Slovenia

Available from: 2023-06-28 Created: 2023-06-28 Last updated: 2023-08-15Bibliographically approved
Myronycheva, O., Björngrim, N., Lin, C.-F., Karlsson, O., Sandberg, D., Zalar, P. & Gunde-Cimerman, N. (2023). Fungus from a historical timber bridge in northern Sweden. In: Polona Zalar; Cene Gostinčar (Ed.), IUBMB Focused Meeting On Extremophilic Fungi: Abstract Book, Ljubljana, Slovenia, 19-22 September, 2023. Paper presented at IUBMB Focused Meeting on Extremophilic Fungi (FUN-EX), Ljubljana, Slovenia, 19-22 September, 2023 (pp. 134). University of Ljubljana, Biotechnical Faculty, Article ID P9.8.
Open this publication in new window or tab >>Fungus from a historical timber bridge in northern Sweden
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2023 (English)In: IUBMB Focused Meeting On Extremophilic Fungi: Abstract Book, Ljubljana, Slovenia, 19-22 September, 2023 / [ed] Polona Zalar; Cene Gostinčar, University of Ljubljana, Biotechnical Faculty , 2023, p. 134-, article id P9.8Conference paper, Poster (with or without abstract) (Refereed)
Place, publisher, year, edition, pages
University of Ljubljana, Biotechnical Faculty, 2023
National Category
Wood Science
Research subject
Wood Science and Engineering
Identifiers
urn:nbn:se:ltu:diva-103462 (URN)
Conference
IUBMB Focused Meeting on Extremophilic Fungi (FUN-EX), Ljubljana, Slovenia, 19-22 September, 2023
Funder
Swedish National Heritage Board, 2022-2403Luleå University of Technology
Note

Funder: CT WOOD;

ISBN for host publication: 978-961-6379-82-3

Available from: 2024-01-03 Created: 2024-01-03 Last updated: 2024-01-30Bibliographically approved
Lin, C.-F., Karlsson, O., Das, O., Mensah, R. A., Mantanis, G. I., Jones, D., . . . Sandberg, D. (2023). High Leach-Resistant Fire-Retardant Modified Pine Wood (Pinus sylvestris L.) by In Situ Phosphorylation and Carbamylation. ACS Omega, 8(12), 11381-11396
Open this publication in new window or tab >>High Leach-Resistant Fire-Retardant Modified Pine Wood (Pinus sylvestris L.) by In Situ Phosphorylation and Carbamylation
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2023 (English)In: ACS Omega, E-ISSN 2470-1343, Vol. 8, no 12, p. 11381-11396Article in journal (Refereed) Published
Abstract [en]

The exterior application of fire-retardant (FR) timber necessitates it to have high durability because of the possibility to be exposed to rainfall. In this study, water-leaching resistance of FR wood has been imparted by grafting phosphate and carbamate groups of the water-soluble FR additives ammonium dihydrogen phosphate (ADP)/urea onto the hydroxyl groups of wood polymers via vacuum-pressure impregnation, followed by drying/heating in hot air. A darker and more reddish wood surface was observed after the modification. Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, solid-state 13C cross-polarization magic-angle-spinning nuclear magnetic resonance (13C CP-MAS NMR), and direct-excitation 31P MAS NMR suggested the formation of C–O–P covalent bonds and urethane chemical bridges. Scanning electron microscopy/energy-dispersive X-ray spectrometry suggested the diffusion of ADP/urea into the cell wall. The gas evolution analyzed by thermogravimetric analysis coupled with quadrupole mass spectrometry revealed a potential grafting reaction mechanism starting with the thermal decomposition of urea. Thermal behavior showed that the FR-modified wood lowered the main decomposition temperature and promoted the formation of char residues at elevated temperatures. The FR activity was preserved even after an extensive water-leaching test, confirmed by the limiting oxygen index (LOI) and cone calorimetry. The reduction of fire hazards was achieved through the increase of the LOI to above 80%, reduction of 30% of the peak heat release rate (pHRR2), reduction of smoke production, and a longer ignition time. The modulus of elasticity of FR-modified wood increased by 40% without significantly decreasing the modulus of rupture.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2023
National Category
Wood Science Physical Chemistry
Research subject
Wood Science and Engineering; Structural Engineering; Chemistry of Interfaces
Identifiers
urn:nbn:se:ltu:diva-95881 (URN)10.1021/acsomega.3c00146 (DOI)000960080200001 ()37008136 (PubMedID)2-s2.0-85150425157 (Scopus ID)
Funder
Swedish Research Council Formas, 2021-00818
Note

Validerad;2023;Nivå 2;2023-04-21 (joosat);

Funder: OP RDE (Grant no.CZ.02.1.01/0.0/0.0/16_019/0000803); CT WOOD, Luleå University of Technology

Licens fulltext: CC BY License

Available from: 2023-03-15 Created: 2023-03-15 Last updated: 2023-09-22Bibliographically approved
Lin, C.-F., Zhang, C., Karlsson, O., Martinka, J., Mantanis, G. I., Rantuch, P., . . . Sandberg, D. (2023). Phytic Acid-Silica System for Imparting Fire Retardancy in Wood Composites. Forests, 14(5), Article ID 1021.
Open this publication in new window or tab >>Phytic Acid-Silica System for Imparting Fire Retardancy in Wood Composites
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2023 (English)In: Forests, ISSN 1999-4907, E-ISSN 1999-4907, Vol. 14, no 5, article id 1021Article in journal (Refereed) Published
Abstract [en]

Fire-retardant (FR) treated wood-based panels, used commonly in furniture and construction, need to meet stringent fire safety regulations. This study presents a novel treatment for imparting fire resistance to wood composites by applying separate solutions of phytic acid and sodium silicate onto wood particles before the hot pressing at 160 °C. A scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDX) analysis revealed that phytic acid and sodium silicate were uniformly distributed throughout the wood particles, and the formation of silica gel resulted in the aggregation of elemental silicon. Fourier-transform infrared spectroscopy (FTIR) displayed that phytic acid caused the thermal degradation of hemicelluloses, which led to a brownish outer appearance of the FR-treated composites. Fire performance was assessed using both limiting oxygen index (LOI) and a cone calorimeter. These techniques showed a higher LOI value and a significant reduction in heat-release rate (HRR), total heat release (THR), smoke-production rate (SPR), and total smoke production (TSP). In addition, cone calorimeter and thermogravimetric (TGA) analyses consistently showed increased char residue in treated wood composites. Moreover, internal bond strength (IB) and modulus of elasticity (MOE) of the wood composite were not significantly changed compared with those of the untreated composite. Surprisingly, in the FR-treated composite, the 24 h-thickness swelling, and the water uptake were slightly decreased. Consequently, this new treatment has the potential to increase the fire retardancy of wood composites, such as particleboard, without deteriorating the key mechanical properties.

Place, publisher, year, edition, pages
MDPI, 2023
Keywords
inorganic-organic hybrid system, sodium phytate, fire retardant, particleboard
National Category
Composite Science and Engineering Wood Science
Research subject
Wood Science and Engineering
Identifiers
urn:nbn:se:ltu:diva-97269 (URN)10.3390/f14051021 (DOI)2-s2.0-85160743772 (Scopus ID)
Projects
Biobased fire protection of wood panel for exterior conditions by using phosphorylated lignin from wheat strawAdvanced research supporting the forestry and woodprocessing sector’s adaptation to global change and the 4th industrial revolution
Funder
Swedish Research Council Formas, 2021-00818Luleå University of Technology, CT-WOOD
Note

Validerad;2023;Nivå 2;2023-05-22 (hanlid);

Funder: Slovak Research and Development Agency (APVV-16-0223); VEGA agency (VEGA 1/0678/22); KEGA agency (KEGA 016STU4/2021);  Swedish wood industry; OP RDE (CZ.02.1.01/0.0/0.0/16_019/0000803)

Available from: 2023-05-22 Created: 2023-05-22 Last updated: 2023-10-11Bibliographically approved
Jones, D., Lin, C.-F., Kim, I., Karlsson, O. & Sandberg, D. (2023). Recent studies into improving the fire retardancy of particleboards at Luleå University of Technologt.. In: Spear, M., Curling, S., Dimitriou, A, Elias, R. & Loxton, C. (Ed.), Proceedings of International Panel Production Symposium 2023: . Paper presented at International Panel Production Symposium 2023 (IPPS23), Llandudno, Wales, United Kingdom, October 3-4, 2023 (pp. 85-93). The BioComposite Centre, Bangor University, UK
Open this publication in new window or tab >>Recent studies into improving the fire retardancy of particleboards at Luleå University of Technologt.
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2023 (English)In: Proceedings of International Panel Production Symposium 2023 / [ed] Spear, M., Curling, S., Dimitriou, A, Elias, R. & Loxton, C., The BioComposite Centre, Bangor University, UK , 2023, p. 85-93Conference paper, Oral presentation with published abstract (Refereed)
Place, publisher, year, edition, pages
The BioComposite Centre, Bangor University, UK, 2023
National Category
Wood Science
Research subject
Wood Science and Engineering
Identifiers
urn:nbn:se:ltu:diva-103635 (URN)
Conference
International Panel Production Symposium 2023 (IPPS23), Llandudno, Wales, United Kingdom, October 3-4, 2023
Funder
Swedish Research Council Formas, 2018-01198Brandforsk, 2021-13
Note

Funder: CT WOOD; OP RDE (CZ.02.1.01/0.0/0.0/16_019/0000803); IPOS (DPBFAST AP4 Brand)

ISBN for host publication: 978-1-84220-200-5

Available from: 2024-01-14 Created: 2024-01-14 Last updated: 2024-01-15Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-7711-9267

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