Change search
Link to record
Permanent link

Direct link
BETA
Publications (10 of 71) Show all publications
Lin, C.-F., Karlsson, O., Mantanis, G. I. & Sandberg, D. (2020). Fire performance and leach resistance of pine wood impregnated with guanyl-urea phosphate/boric acid and a melamine-formaldehyde resin. European Journal of Wood and Wood Products, 78(1), 107-111
Open this publication in new window or tab >>Fire performance and leach resistance of pine wood impregnated with guanyl-urea phosphate/boric acid and a melamine-formaldehyde resin
2020 (English)In: European Journal of Wood and Wood Products, ISSN 0018-3768, E-ISSN 1436-736X, Vol. 78, no 1, p. 107-111Article in journal (Refereed) Published
Abstract [en]

Scots pine (Pinus sylvestris L.) wood impregnated with guanyl-urea phosphate/boric acid and a melamine-formaldehyde resin exhibited considerably increased resistance to leaching, while sustaining superior fire retardancy as tested by the limiting oxygen index (LOI) method. It was found that guanyl-urea phosphate has been well trapped in the wood structure by the cured resin network as evidenced by FTIR spectroscopy. Markedly, weight percentage gain (WPG) losses of fire retardant as low as 7.4% were achieved after excessive leaching of treated wood (EN 84). This was attributed to the effect of melamine-formaldehyde resin. Overall, this type of treatment could be a reliable method for producing fire-resistant pine wood for exterior uses.

Place, publisher, year, edition, pages
Springer, 2020
National Category
Other Mechanical Engineering
Research subject
Wood Science and Engineering
Identifiers
urn:nbn:se:ltu:diva-78022 (URN)10.1007/s00107-019-01483-y (DOI)000511720000010 ()
Note

Validerad;2020;Nivå 2;2020-03-10 (johcin)

Available from: 2020-03-10 Created: 2020-03-10 Last updated: 2020-03-10Bibliographically approved
Neyses, B., Karlsson, O. & Sandberg, D. (2020). The effect of ionic liquid and superbase pre-treatment on the spring-back, set-recovery and Brinell hardness of surface-densified Scots pine. Holzforschung, 74(3), 303-312
Open this publication in new window or tab >>The effect of ionic liquid and superbase pre-treatment on the spring-back, set-recovery and Brinell hardness of surface-densified Scots pine
2020 (English)In: Holzforschung, ISSN 0018-3830, E-ISSN 1437-434X, Vol. 74, no 3, p. 303-312Article in journal (Refereed) Published
Abstract [en]

Compressing the surface of sawn timber results in a substantial increase in hardness, and this opens up new market opportunities of using low-density timber species as the raw material for high-value wood products. Unfortunately, widespread commercialisation is hindered by the lack of an industrially viable surface densification process, the major obstacle being the set-recovery (SR) of the densified wood cells upon exposure to moisture. Our hypothesis is that partial dissolution of the crystalline cellulose during densification will largely prevent the SR of densified wood. We therefore evaluated the effect of ionic liquid (IL) or organic superbase pre-treatment on the elastic spring-back (SB), SR and Brinell hardness (HB) of surface-densified wood. Specimens of Scots pine were treated with solutions of ILs or superbases, and then densified in a hot press at temperatures between 200°C and 270°C. The SR was reduced from 90% for the control group to only about 10% for the treated materials. The treated and densified specimens exhibited a higher HB than their untreated and densified counterparts. The method presented in this study is a precursor to the development of a continuous densification process adapted for an open system. Further studies are needed to understand the underlying mechanisms of the pre-treatment.

Place, publisher, year, edition, pages
Walter de Gruyter, 2020
Keywords
chemical treatment, surface modification, wood compression, wood modification
National Category
Other Mechanical Engineering
Research subject
Wood Science and Engineering
Identifiers
urn:nbn:se:ltu:diva-75738 (URN)10.1515/hf-2019-0158 (DOI)000516773800007 ()2-s2.0-85073157805 (Scopus ID)
Note

Validerad;2020;Nivå 2;2020-03-31 (alebob)

Available from: 2019-08-29 Created: 2019-08-29 Last updated: 2020-03-31Bibliographically approved
Myronycheva, O., Poohphajai, F., Sehlstedt-Persson, M., Vikberg, T., Karlsson, O., Junge, H. & Sandberg, D. (2019). Application of GRAS Compounds for the Control of Mould Growth on Scots Pine Sapwood Surfaces: Multivariate Modelling of Mould Grade. Forests, 10(9), Article ID 714.
Open this publication in new window or tab >>Application of GRAS Compounds for the Control of Mould Growth on Scots Pine Sapwood Surfaces: Multivariate Modelling of Mould Grade
Show others...
2019 (English)In: Forests, ISSN 1999-4907, E-ISSN 1999-4907, Vol. 10, no 9, article id 714Article in journal (Refereed) Published
Abstract [en]

Research Highlights: In this study, the Generally Recognised as Safe (GRAS) compounds were applied in order to study mould-fungi growth on dried Scots pine sapwood. Background and Objectives: The transition to the use of more sustainable wood-material may be possible by applying GRAS compounds that can control and prevent contamination by primary colonising mould fungi. Materials and Methods: Kiln-dried sawn timber was treated with three different GRAS compounds, and different fungal inoculation methods applied in order to investigate differences in the development of fungal communities. Results: Substances based on potassium silicate significantly reduced fungal growth and mould contamination on the studied wood surfaces. By combining wood-surface treatments with GRAS compounds, fungal-area size as predictors and mould grade as response, a partial least squares (PLS) model that makes it possible to predict mould grade on wood surfaces was developed. The PLS model is a key component in the development of a smart grading-systems equipped by e.g. high-speed digital cameras for the early detection of fungal attack on wood surfaces in different applications. However, the measurements based on chemical characterisation should be the next step to take in order significantly to enhance the model and increase the range of robust applications. In the current study, a multivariate model describing the influence of each fungal-covering area on mould grade was presented for the first time.

Place, publisher, year, edition, pages
MDPI, 2019
Keywords
bacteria, potassium silicate, N-Alkylbensyldimethylammonium chloride, wood, fungi, mould area, PLS modeling
National Category
Wood Science Other Mechanical Engineering
Research subject
Wood Science and Engineering
Identifiers
urn:nbn:se:ltu:diva-75696 (URN)10.3390/f10090714 (DOI)000487978700070 ()2-s2.0-85072556439 (Scopus ID)
Note

Validerad;2019;Nivå 2;2019-08-27 (johcin)

Available from: 2019-08-26 Created: 2019-08-26 Last updated: 2020-01-28Bibliographically approved
Lin, C.-F., Karlsson, O., Mantanis, G. I. & Sandberg, D. (2019). Fire performance and leach resistance of pine wood impregnated with guanyl-urea phosphate (GUP)/boric acid (BA) and melamine-formaldehyde (MF) resin. In: Fredriksson M. (Ed.), Proceedings of the 15th Annual Meeting of the Northern European Network for Wood Science and Engineering - WSE2019,  Lund, Sweden, October  9-10: . Paper presented at 15th Annual Meeting of the Northern European Network for Wood Science and Engineering - WSE2019 (pp. 147-149). Lund: Lund University Open Access
Open this publication in new window or tab >>Fire performance and leach resistance of pine wood impregnated with guanyl-urea phosphate (GUP)/boric acid (BA) and melamine-formaldehyde (MF) resin
2019 (English)In: Proceedings of the 15th Annual Meeting of the Northern European Network for Wood Science and Engineering - WSE2019,  Lund, Sweden, October  9-10 / [ed] Fredriksson M., Lund: Lund University Open Access, 2019, p. 147-149Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
Lund: Lund University Open Access, 2019
National Category
Wood Science
Research subject
Wood Science and Engineering
Identifiers
urn:nbn:se:ltu:diva-76392 (URN)
Conference
15th Annual Meeting of the Northern European Network for Wood Science and Engineering - WSE2019
Available from: 2019-10-14 Created: 2019-10-14 Last updated: 2020-01-28
Sekan, A. S., Myronycheva, O., Karlsson, O., Gryganskyi, A. P. & Blume, Y. (2019). Green potential of Pleurotus spp. in biotechnology. PeerJ, 7, Article ID e6664.
Open this publication in new window or tab >>Green potential of Pleurotus spp. in biotechnology
Show others...
2019 (English)In: PeerJ, ISSN 2167-8359, E-ISSN 2167-8359, Vol. 7, article id e6664Article in journal (Refereed) Published
Abstract [en]

Background

The genus Pleurotus is most exploitable xylotrophic fungi, with valuable biotechnological, medical, and nutritional properties. The relevant features of the representatives of this genus to provide attractive low-cost industrial tools have been reported in numerous studies to resolve the pressure of ecological issues. Additionally, a number of Pleurotus species are highly adaptive, do not require any special conditions for growth, and possess specific resistance to contaminating diseases and pests. The unique properties of Pleurotus species widely used in many environmental technologies, such as organic solid waste recycling, chemical pollutant degradation, and bioethanol production.

Methodology

The literature study encompasses peer-reviewed journals identified by systematic searches of electronic databases such as Google Scholar, NCBI, Springer, ResearchGate, ScienceDirect, and ISI Web of Knowledge. The search scheme was divided into several steps, as described below.

Results

In this review, we describe studies examining the biotechnological feasibility of Pleurotus spp. to elucidate the importance of this genus for use in green technology. Here, we review areas of application of the genus Pleurotus as a prospective biotechnological tool.

Conclusion

The incomplete description of some fungal biochemical pathways emphasises the future research goals for this fungal culture.

Place, publisher, year, edition, pages
PeerJ, Inc, 2019
Keywords
Waste bioremediation, Mushroom cultivation, Pleurotus, Degradation, Polycyclic aromatic hydrocarbons, Enzyme, Lignin, Gene, Identification
National Category
Engineering and Technology Industrial Biotechnology Other Mechanical Engineering
Research subject
Wood Science and Engineering
Identifiers
urn:nbn:se:ltu:diva-73354 (URN)10.7717/peerj.6664 (DOI)000462697000007 ()30967974 (PubMedID)
Note

Validerad;2019;Nivå 2;2019-04-10 (inah)

Available from: 2019-03-29 Created: 2019-03-29 Last updated: 2019-04-12Bibliographically approved
Kim, I., Karlsson, O., Jones, D. & Sandberg, D. (2019). Maleic anhydride and sodium hypophosphite as a potential wood modification system. In: Fredriksson M (Ed.) (Ed.), Proceedings of the 15th Annual Meeting of the Northern European Network for Wood Science and Engineering - WSE2019,  Lund, Sweden, October  9-10, pp. 28-30: . Paper presented at 15th Annual Meeting of the Northern European Network for Wood Science and Engineering - WSE2019 (pp. 28-30). Lund: Lund University Open Access
Open this publication in new window or tab >>Maleic anhydride and sodium hypophosphite as a potential wood modification system
2019 (English)In: Proceedings of the 15th Annual Meeting of the Northern European Network for Wood Science and Engineering - WSE2019,  Lund, Sweden, October  9-10, pp. 28-30 / [ed] Fredriksson M (Ed.), Lund: Lund University Open Access, 2019, p. 28-30Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
Lund: Lund University Open Access, 2019
National Category
Wood Science
Research subject
Wood Science and Engineering
Identifiers
urn:nbn:se:ltu:diva-76391 (URN)
Conference
15th Annual Meeting of the Northern European Network for Wood Science and Engineering - WSE2019
Available from: 2019-10-14 Created: 2019-10-14 Last updated: 2020-01-28
Myronycheva, O., Karlsson, O., Sehlstedt-Persson, M., Öhman, M. & Sandberg, D. (2019). Portable microNIR sensor for the evaluation of mould contamination on wooden surfaces. In: LeVan-Green, S. (Ed.), Proceedings of the 62nd International Convention of ociety of Wood Science and Technology. Convention  Tenaya Lodge, Yosemite, California, USA, October 20-25: Theme: Renewable Materials and the Wood-based Bioeconomy,. Paper presented at 62nd International Convention of ociety of Wood Science and Technology (pp. 46-51). SWST, Society of Wood Science and Technology
Open this publication in new window or tab >>Portable microNIR sensor for the evaluation of mould contamination on wooden surfaces
Show others...
2019 (English)In: Proceedings of the 62nd International Convention of ociety of Wood Science and Technology. Convention  Tenaya Lodge, Yosemite, California, USA, October 20-25: Theme: Renewable Materials and the Wood-based Bioeconomy, / [ed] LeVan-Green, S., SWST, Society of Wood Science and Technology , 2019, p. 46-51Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
SWST, Society of Wood Science and Technology, 2019
National Category
Wood Science
Research subject
Wood Science and Engineering
Identifiers
urn:nbn:se:ltu:diva-76467 (URN)978-0-9817876-9-5 (ISBN)
Conference
62nd International Convention of ociety of Wood Science and Technology
Available from: 2019-10-22 Created: 2019-10-22 Last updated: 2020-01-28
Garskaite, E., Karlsson, O., Stankeviciute, Z., Aivaras, K., Jones, D. & Sandberg, D. (2019). Surface hardness and flammability of Na2SiO3 and nano-TiO2 reinforced wood composites. RSC Advances, 9(48), 27973-27986
Open this publication in new window or tab >>Surface hardness and flammability of Na2SiO3 and nano-TiO2 reinforced wood composites
Show others...
2019 (English)In: RSC Advances, ISSN 2046-2069, E-ISSN 2046-2069, Vol. 9, no 48, p. 27973-27986Article in journal (Refereed) Published
Abstract [en]

The objective of this study was to explore an effect of the combined inorganic materials on the wood hardness and flame-retardancy properties in a concept of sustainable material management. Herein, the reinforcement of Scots pine (Pinus sylvestris L.) sapwood with sodium silicate and TiO2 nanoparticles via vacuum-pressure technique is reported. Pyrolysis of modified wood was studied by TG-FTIR analysis; the results showed that maximum weight loss for the modified wood was obtained at 40–50 °C lower temperatures compared to the reference untreated wood. The Gram–Schmidt profiles and spectra extracted at maxima absorption from Gram–Schmidt plots indicated chemical changes in wood–inorganic composites. SEM/EDS analysis revealed the presence of Na–O–Si solid gel within the wood-cell lumen and showed that TiO2 was homogeneously distributed within the amorphous Na–O–Si glass-forming phase to form a thin surface coating. EDS mapping further revealed the higher diffusivity of sodium into the cell wall compared to the silicon compound. The presence of amorphous sodium silicate and nano-TiO2 was additionally confirmed by XRD analysis. FTIR spectra confirmed the chemical changes in Scots pine sapwood induced by alkalization. Brinell hardness test showed that the hardness of the modified wood increased with the highest value (44% increase in hardness) obtained for 10% Na2SiO3–nTiO2 modified wood. The results showed good correlation between TG and flammability test; limiting oxygen index (LOI) values for the wood–inorganic composites increased by 9–14% compared to the untreated wood.

Place, publisher, year, edition, pages
Royal Society of Chemistry, 2019
National Category
Wood Science Other Mechanical Engineering
Research subject
Wood Science and Engineering
Identifiers
urn:nbn:se:ltu:diva-76014 (URN)10.1039/c9ra05200c (DOI)000496137600064 ()
Funder
Swedish Research Council Formas, 2018-01198
Note

Validerad;2019;Nivå 2;2019-09-18 (johcin)

Available from: 2019-09-16 Created: 2019-09-16 Last updated: 2020-01-28Bibliographically approved
Raudoniene, J., Skaudzius, R., Zarkov, A., Selskis, A., Karlsson, O., Kareiva, A. & Garskaite, E. (2019). Wet-chemistry synthesis of shape-controlled Ag3PO4 crystals and their 3D surface reconstruction from SEM imagery. Powder Technology, 345, 26-34
Open this publication in new window or tab >>Wet-chemistry synthesis of shape-controlled Ag3PO4 crystals and their 3D surface reconstruction from SEM imagery
Show others...
2019 (English)In: Powder Technology, ISSN 0032-5910, E-ISSN 1873-328X, Vol. 345, p. 26-34Article in journal (Refereed) Published
Abstract [en]

A simple chemical solution-based synthesis route has been developed to prepare uniform and shape-controllable Ag3PO4 crystals. Tetrapod- and cube-shaped crystals having a size of about 9–10 μm were prepared from AgNO3 and NH4H2PO4 precursors, and pseudo-octahedral (equiaxial) crystals were prepared from AgNO3 and (NH4)2HPO4. TEM analysis revealed Ag3PO4 crystals to be electron beam sensitive materials, which under a voltage of 200 kV decompose to the metallic Ag, thereby demonstrating the difficulty in determining crystal facets and structural defects using conventional electron diffraction studies. UV–Vis diffuse reflectance spectroscopy was used to study the correlation between structural and optical properties of surfaces of Ag3PO4 crystals. Furthermore, a spatial 3-dimentional (3D) reconstruction of Ag3PO4 surface structures was performed from SEM images. The reconstruction produced realistic 3D mesh models, insomuch that the 3D reconstructed structures provided extra information about the examined crystals. Results suggested that the proposed synthesis route and performed spatial reconstruction of Ag3PO4 had the potential for simulating processing conditions to produce various microcrystals and explore material surface structures and reconstruction of microstructures.

Place, publisher, year, edition, pages
Elsevier, 2019
Keywords
Silver orthophosphate, Crystals, Precipitation, SEM, 3D view reconstruction, (structure-from-motion) SfM
National Category
Other Materials Engineering Materials Chemistry
Research subject
Wood Science and Engineering
Identifiers
urn:nbn:se:ltu:diva-72418 (URN)10.1016/j.powtec.2018.12.091 (DOI)000463122300003 ()2-s2.0-85059340981 (Scopus ID)
Note

Validerad;2019;Nivå 2;2019-01-11 (svasva)

Available from: 2018-12-30 Created: 2018-12-30 Last updated: 2019-04-17Bibliographically approved
Kim, I., Karlsson, O., Antzutkin, O., Shah, F. U., Jones, D. & Sandberg, D. (2019). Wood modification with maleic anhydride and sodium hypophosphite. In: Proceedings of the 20th International Symposium on Wood, Fiber and Pulping Chemistry, ISWFPC20, September 9-11, 2019, Tokyo, Japan, 4 pp.: . Paper presented at Proceedings of the 20th International Symposium on Wood, Fiber and Pulping Chemistry, ISWFPC20, September 9-11, 2019, Tokyo, Japan, 4 pp. (pp. 1-4). Tokyo: The University of Tokyo
Open this publication in new window or tab >>Wood modification with maleic anhydride and sodium hypophosphite
Show others...
2019 (English)In: Proceedings of the 20th International Symposium on Wood, Fiber and Pulping Chemistry, ISWFPC20, September 9-11, 2019, Tokyo, Japan, 4 pp., Tokyo: The University of Tokyo , 2019, p. 1-4Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
Tokyo: The University of Tokyo, 2019
National Category
Wood Science
Identifiers
urn:nbn:se:ltu:diva-76121 (URN)
Conference
Proceedings of the 20th International Symposium on Wood, Fiber and Pulping Chemistry, ISWFPC20, September 9-11, 2019, Tokyo, Japan, 4 pp.
Available from: 2019-09-26 Created: 2019-09-26 Last updated: 2020-01-28
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-7711-9267

Search in DiVA

Show all publications