{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,25]],"date-time":"2026-04-25T20:11:24Z","timestamp":1777147884763,"version":"3.51.4"},"reference-count":49,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2020,3,25]],"date-time":"2020-03-25T00:00:00Z","timestamp":1585094400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Nanomaterials"],"abstract":"<jats:p>An issue in engineered wood products, like oriented strand lumber (OSL), is the low thermal conductivity coefficient of raw material, preventing the fast transfer of heat into the core of composite mats. The aim of this paper is to investigate the effect of sepiolite at nanoscale with aspect ratio of 1:15, in mixture with urea-formaldehyde resin (UF), and its effect on thermal conductivity coefficient of the final panel. Sepiolite was mixed with UF resin for 20 min prior to being sprayed onto wood strips in a rotary drum. Ten percent of sepiolite was mixed with the resin, based on the dry weight of UF resin. OSL panels with two resin contents, namely 8% and 10%, were manufactured. Temperature was measured at the core section of the mat at 5-second intervals, using a digital thermometer. The thermal conductivity coefficient of OSL specimens was calculated based on Fourier\u2019s Law for heat conduction. With regard to the fact that an improved thermal conductivity would ultimately be translated into a more effective polymerization of the resin, hardness of the panel was measured, at different depths of penetration of the Janka ball, to find out how the improved conductivity affected the hardness of the produced composite panels. The measurement of core temperature in OSL panels revealed that sepiolite-treated panels with 10% resin content had a higher core temperature in comparison to the ones containing 8% resin. Furthermore, it was revealed that the addition of sepiolite increased thermal conductivity in OSL panels made with 8% and 10% resin contents, by 36% and 40%, respectively. The addition of sepiolite significantly increased hardness values in all penetration depths. Hardness increased as sepiolite content increased. Considering the fact that the amount of sepiolite content was very low, and therefore it could not physically impact hardness increase, the significant increase in hardness values was attributed to the improvement in the thermal conductivity of panels and subsequent, more complete, curing of resin. <\/jats:p>","DOI":"10.3390\/nano10040599","type":"journal-article","created":{"date-parts":[[2020,3,25]],"date-time":"2020-03-25T13:10:47Z","timestamp":1585141847000},"page":"599","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":24,"title":["Improving Thermal Conductivity Coefficient in Oriented Strand Lumber (OSL) Using Sepiolite"],"prefix":"10.3390","volume":"10","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6952-0923","authenticated-orcid":false,"given":"Hamid R.","family":"Taghiyari","sequence":"first","affiliation":[{"name":"Wood Science and Technology Department, Faculty of Materials Engineering &amp; New Technologies, Shahid Rajaee Teacher Training University, Tehran 1678815811, Iran"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9490-2686","authenticated-orcid":false,"given":"Abolfazl","family":"Soltani","sequence":"additional","affiliation":[{"name":"Faculty of Civil Engineering, Shahid Rajaee Teacher Training University, Tehran 1678815811, Iran"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ayoub","family":"Esmailpour","sequence":"additional","affiliation":[{"name":"Department of Physics, Faculty of Sciences, Shahid Rajaee Teacher Training University, Tehran 1678815811, Iran"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Vahid","family":"Hassani","sequence":"additional","affiliation":[{"name":"Wood Science and Technology Department, Faculty of Materials Engineering &amp; New Technologies, Shahid Rajaee Teacher Training University, Tehran 1678815811, Iran"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hamed","family":"Gholipour","sequence":"additional","affiliation":[{"name":"Department of Mechanical Engineering, Shahid Rajaee Teacher Training University, Tehran 1678815811, Iran"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6226-5309","authenticated-orcid":false,"given":"Antonios N.","family":"Papadopoulos","sequence":"additional","affiliation":[{"name":"Laboratory of Wood Chemistry and Technology, Department of Forestry and Natural Environment, International Hellenic University, GR-661 00 Drama, Greece"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2020,3,25]]},"reference":[{"key":"ref_1","first-page":"553","article-title":"Effects of nanoclay addition to phenol-formaldehyde resin on the permeability of oriented strand lumber","volume":"42","author":"Zhang","year":"2010","journal-title":"Wood Fiber Sci."},{"key":"ref_2","unstructured":"Akrami, A. (2010). Development and characterization of oriented strand boards made from the European hardwood species: Beech (Fagus sylvatica L.) and poplar (Populus tremula L.). [Ph.D. Thesis, Faculty of Mathematics, Informatics, and Natural Sciences, University of Hamburg]."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"155","DOI":"10.1016\/j.compositesb.2014.04.021","article-title":"Nano-engineered plywood panels: Performance properties","volume":"64","author":"Candan","year":"2014","journal-title":"Compos. Part B"},{"key":"ref_4","first-page":"115","article-title":"Oriented strand lumber from rubberwood residues","volume":"2","author":"Malanit","year":"2005","journal-title":"Walailak J. Sci. Technol."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"499","DOI":"10.15376\/biores.5.1.499-506","article-title":"Chemical modification of solid wood and wood raw materials for composites production with linear chain carboxylic acid anhydrides: A brief Review","volume":"5","author":"Papadopoulos","year":"2010","journal-title":"BioResources"},{"key":"ref_6","unstructured":"Kelly, M.W. (1977). Critical Literature Review of Relationships between Processing Parameters and Physical Properties of Particleboard, Forest Products Laboratory. USDA For. Serv. Gen. Tech. Rep FPL-10."},{"key":"ref_7","unstructured":"Maloney, T.M. (1993). Modern Particleboard and Dry Process Fibreboard Manufacturing, Hal Leonard Corporation."},{"key":"ref_8","unstructured":"Walker, J.C.F. (2006). Primary Wood Processing: Principles and Practice, Springer."},{"key":"ref_9","doi-asserted-by":"crossref","unstructured":"Papadopoulos, A.N., Bikiaris, D.N., Mitropoulos, A.C., and Kyzas, G.Z. (2019). Nanomaterials and chemical modification technologies for enhanced wood properties: A review. Nanomaterials, 9.","DOI":"10.3390\/nano9040607"},{"key":"ref_10","doi-asserted-by":"crossref","unstructured":"Bayani, S., Taghiyari, H.R., and Papadopoulos, A.N. (2019). Physical and mechanical properties of thermally-modified beech wood impregnated with silver nano-suspension and their relationship with the crystallinity of cellulose. Polymers, 11.","DOI":"10.3390\/polym11101538"},{"key":"ref_11","doi-asserted-by":"crossref","unstructured":"Taghiyari, H., Esmailpour, A., and Papadopoulos, A. (2019). Paint Pull-Off Strength and Permeability in Nanosilver-Impregnated and Heat-Treated Beech Wood. Coatings, 9.","DOI":"10.3390\/coatings9110723"},{"key":"ref_12","doi-asserted-by":"crossref","unstructured":"Hassani, V., Taghiyari, H.R., Schmidt, O., Maleki, S., and Papadopoulos, A.N. (2019). Mechanical and physical properties of Oriented Strand Lumber (OSL): The effect of fortification level of nanowollastonite on UF resin. Polymers, 11.","DOI":"10.3390\/polym11111884"},{"key":"ref_13","doi-asserted-by":"crossref","unstructured":"Papadopoulos, A.N., and Taghiyari, H.R. (2019). Innovative wood surface treatments based on nanotechnology. Coatings, 9.","DOI":"10.3390\/coatings9120866"},{"key":"ref_14","doi-asserted-by":"crossref","unstructured":"Li, D. (2012). Nanostructuring materials towards conventionally unachievable combination of desired properties. J. Nanomater. Mol. Nanotechnol., 1.","DOI":"10.4172\/2324-8777.1000e102"},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"249","DOI":"10.1007\/s00107-008-0252-6","article-title":"The biological effectiveness of wood modified with linear chain carboxylic acid anhydrides against the subterranean termites Reticulitermes flavipes","volume":"66","author":"Papadopoulos","year":"2003","journal-title":"Holz Als Roh-Und Werkstoff"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"5611","DOI":"10.15376\/biores.7.4.5611-5621","article-title":"Copper complexes grafted to amino-functionalized silica gel as wood preservatives against fungal decay: Mini-blocks and standard test","volume":"7","author":"Palanti","year":"2012","journal-title":"BioResources"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1016\/j.indcrop.2012.05.010","article-title":"Improving some of applied properties of oriented strand board (OSB) made from underutilized low quality Paulownia (Paulownia fortunei) wood employing nano-SiO2","volume":"42","author":"Salari","year":"2013","journal-title":"Ind. Crop. Prod."},{"key":"ref_18","doi-asserted-by":"crossref","unstructured":"Taghiyari, H.R. (2014). Nanotechnology in Wood and Wood-Composite Materials. J. Nanomater. Mol. Nanotechnol., 3.","DOI":"10.4172\/2324-8777.1000e106"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"515","DOI":"10.1007\/s00226-010-0326-6","article-title":"The sorption of water vapour of wood treated with a nanotechnology compound","volume":"44","author":"Mantanis","year":"2010","journal-title":"Wood Sci. Technol."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"140","DOI":"10.1016\/j.ibiod.2014.02.010","article-title":"Evaluation of mold, decay and termite resistance of pine wood treated with zinc and copper based nanocompounds","volume":"90","author":"Mantanis","year":"2014","journal-title":"Int. Biodeterior. Biodegrad."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"7","DOI":"10.19182\/bft2017.334.a31487","article-title":"Effects of different nanoclay loadings on the physical and mechanical properties of Melia composite particle board","volume":"334","author":"Ismita","year":"2017","journal-title":"Bois Et For. Des Trop."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"199","DOI":"10.1016\/j.ibiod.2007.11.004","article-title":"The resistance of wood modified with linear chain carboxylic acid anhydrides to attack by the marine wood borer Limnoria quadripunctata Hothius","volume":"61","author":"Papadopoulos","year":"2008","journal-title":"Int. Biodegrad. Biodeterior."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"2797","DOI":"10.1590\/0001-3765201820170914","article-title":"Wollastonite to hinder growth of Aspergillus niger fungus on cotton textile","volume":"90","author":"Taghiyari","year":"2018","journal-title":"Anais da Academia Brasileira de Ciencias"},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"296","DOI":"10.1016\/j.msec.2016.08.077","article-title":"Sepiolite as a promising nanoclay for nano-biocomposites based on starch and biodegradable polyester","volume":"70","author":"Olivato","year":"2017","journal-title":"Mater. Sci. Eng. C"},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"1508","DOI":"10.1016\/j.compscitech.2012.05.017","article-title":"Preparation, structure and thermal properties of polylactide\/sepiolite nanocomposites with and without organic modifiers","volume":"72","author":"Liu","year":"2012","journal-title":"Compos. Sci. Technol."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"161","DOI":"10.1016\/j.micromeso.2007.04.020","article-title":"Thermal and morphologicalcharacterization of organically modified sepiolite","volume":"107","author":"Tartaglione","year":"2008","journal-title":"Microporous Mesoporous Mater."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"2334","DOI":"10.1016\/j.compscitech.2007.01.012","article-title":"Preparation, structure and thermomechanical properties of nylon-6 nanocomposites with lamella-type and fiber type sepiolite","volume":"67","author":"Xie","year":"2007","journal-title":"Compos. Sci. Technol."},{"key":"ref_28","first-page":"445","article-title":"Characterization and properties of sepiolite\/polyurethane nanocomposites","volume":"725","author":"Chen","year":"2007","journal-title":"Mater. Sci. Eng. A"},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"86","DOI":"10.1039\/b003197f","article-title":"Molecular access to intracrystalline tunnels of sepiolite","volume":"11","year":"2001","journal-title":"J. Mater. Chem."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"226","DOI":"10.1016\/j.compscitech.2018.12.025","article-title":"Self-organization of sepiolite fibbers in a biobased thermoset","volume":"171","author":"Falco","year":"2019","journal-title":"Compos. Sci. Technol."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"2542","DOI":"10.1002\/macp.200700335","article-title":"How can nanohybrids enhance polyester sepiolite nanocomposite properties","volume":"208","author":"Duaresne","year":"2007","journal-title":"Macromol. Chem. Phys."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"2163","DOI":"10.1002\/app.22337","article-title":"Study on sepiolite-reinforced polymeric nanocomposites","volume":"99","author":"Zheng","year":"2006","journal-title":"J. Appl. Polym. Sci."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"4931","DOI":"10.1016\/j.eurpolymj.2007.09.010","article-title":"Preparation of poly- propylene\/sepiolite nanocomposites using supercritical CO2 assisted mixing","volume":"43","author":"Ma","year":"2007","journal-title":"Eur. Polym. J."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"2047","DOI":"10.1021\/ie101737n","article-title":"Flame-retardant effect of sepiolite on an intumescent flame-retardant polypropylene system","volume":"50","author":"Liu","year":"2011","journal-title":"Ind. Eng. Chem. Res."},{"key":"ref_35","doi-asserted-by":"crossref","unstructured":"Li, X., Gao, Q., Xia, C., Li, J., and Zhou, X. (2019). Urea formaldehyde resin resultant plywood with rapid formaldehyde release modified by tunnel-structured sepiolite. Polymers, 11.","DOI":"10.3390\/polym11081286"},{"key":"ref_36","first-page":"77","article-title":"Presentation and Examination of the Occurrence of Sepiolite Mineral in Tanbo Region, Southeastern Minab, Iran","volume":"10","author":"Soltani","year":"2019","journal-title":"Res. Earth Sci."},{"key":"ref_37","doi-asserted-by":"crossref","unstructured":"Taghiyari, H.R., Mobini, K., Sarvari Samadi, Y., Doosti, Z., Karimi, F., Asghari, M., Jahangiri, A., and Nouri, P. (2013). Effects of nano-wollastonite on thermal conductivity coefficient of medium-density fiberboard. J. Mol. Nanotechnol., 2.","DOI":"10.4172\/2324-8777.1000106"},{"key":"ref_38","first-page":"303","article-title":"Effect of nanosilver on the rate of heat transfer to the core of the medium density fiberboard mat","volume":"2","author":"Taghiyari","year":"2013","journal-title":"Int. J. Bio-Inorg. Hybrid Nanomater."},{"key":"ref_39","doi-asserted-by":"crossref","unstructured":"Hakeem, K.R., Jawaid, M., and Alothman, O.Y. (2015). Effects of Nanotechnology on Fluid Flow. In Agricultural and Wood-Based Composites Materials. Agricultural Biomass Based Potential Materials, Springer.","DOI":"10.1007\/978-3-319-13847-3"},{"key":"ref_40","doi-asserted-by":"crossref","unstructured":"Taghiyari, H.R., Norton, J., and Tajvidi, M. (2017). Effects of Nano-Materials on Different Properties of Wood-Composite Materials. Bio-based Wood Adhesives: Preparation, Characterization, and Testing, CRC Press\/Taylor & Francis Group.","DOI":"10.1201\/9781315369242-14"},{"key":"ref_41","doi-asserted-by":"crossref","unstructured":"Esmailpour, A., Taghiyari, H.R., Hosseinpourpia, R., Adamopoulos, S., and Zereshki, K. (2020). Shear strength of heat-treated solid wood bonded with polyvinyl-acetate reinforced by nanowollastonite. Wood Res., (in press).","DOI":"10.37763\/wr.1336-4561\/65.2.183194"},{"key":"ref_42","first-page":"205","article-title":"Effect of sepiolite mineral on thermal properties and thermal conductivity of wood plastic composite materials","volume":"19","author":"Alma","year":"2018","journal-title":"Turkish J. For."},{"key":"ref_43","unstructured":"Bergman, T., Lavine, A., Incropera, F., and DeWitt, D. (2011). Fundamentals of Heat and Mass Transfer, John Wiley & Sons. [7th ed.]."},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"4138","DOI":"10.15376\/biores.9.3.4138-4149","article-title":"Effects of the improvement in thermal conductivity coefficient by nano-wollastonite on physical and mechanical properties in medium-density fiberboard (MDF)","volume":"9","author":"Taghiyari","year":"2014","journal-title":"BioResources"},{"key":"ref_45","doi-asserted-by":"crossref","unstructured":"Taghiyari, H.R., Hassani, V., Maleki, S., and Eckelman, C.A. (2017). Effects of nano-wollastonite on screw withdrawal capacity of oriented strand lumber. J. Nanomater. Mol. Nanotechnol., 6.","DOI":"10.4172\/2324-8777.1000224"},{"key":"ref_46","doi-asserted-by":"crossref","unstructured":"Chihi, M., Tarfaoui, M., Bouraoui, C., and El Moumen, A. (2020). Effect of CNTs additives on the energy balance of carbon\/epoxy nanocomposites during dynamic compression test. Polymers, 12.","DOI":"10.3390\/polym12010194"},{"key":"ref_47","doi-asserted-by":"crossref","unstructured":"Dul, S., Ecco, L.G., Pegoretti, A., and Fambri, L. (2020). Graphene\/carb\u00f3n nanotube hybrid nanocomposites: Effect of compression molding and fused filament fabrication on properties. Polymers, 12.","DOI":"10.3390\/polym12010101"},{"key":"ref_48","doi-asserted-by":"crossref","unstructured":"Kumar, V.V., Balaganesan, G., Lee, J.K.Y., Esmaeely Neisiany, R., Surendran, S., and Ramakrishna, S. (2020). A review of recent advances in nanoengineered polymer composites. Polymers, 11.","DOI":"10.3390\/polym11040644"},{"key":"ref_49","doi-asserted-by":"crossref","first-page":"72","DOI":"10.4028\/www.scientific.net\/KEM.535-536.72","article-title":"Impact loading on glass\/epoxy composite laminates with nano clay","volume":"535\u2013536","author":"Velmurugan","year":"2013","journal-title":"Key Eng. Mater."}],"container-title":["Nanomaterials"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2079-4991\/10\/4\/599\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T09:11:24Z","timestamp":1760173884000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2079-4991\/10\/4\/599"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2020,3,25]]},"references-count":49,"journal-issue":{"issue":"4","published-online":{"date-parts":[[2020,4]]}},"alternative-id":["nano10040599"],"URL":"https:\/\/doi.org\/10.3390\/nano10040599","relation":{},"ISSN":["2079-4991"],"issn-type":[{"value":"2079-4991","type":"electronic"}],"subject":[],"published":{"date-parts":[[2020,3,25]]}}}