Color Changes, EMC and Biological Resistance of Thermally Modified Yellow Poplar
Keywords:Pycnoporus sanguineus, Cryptoermes brevis, Liriodendron tulipifera, thermal modification, colorimetric values
Liriodendron tulipifera L., known as yellow poplar, are fast-growing trees, make up about 17% of commercially available hardwood in North America, and are generally used in furniture, doors, and millwork. The wood is used mostly where it would be hidden or painted. The value of yellow poplar is less than that of other hardwoods with more pronounced grain and color. This study evaluated the effect of various levels of thermal treatment on color and resistance to decay fungus and termites of yellow poplar wood. Boards (28.57 mm thickness150 mm width3.65 m length) were taken from a sawmill and thermally modified at temperatures of 180°C, 200°C, and 220°C. A summary of the findings were that thermal treatment caused: 1) darkening and reddening of yellow poplar wood; 2) a reduction of up to 51.4% in EMC when exposed to 21°C and 65% relative humidity, and 3) a significant increase in wood decay resistance against decay fungus Pycnoporus sanguineus. Treatment at 220°C resulted in a change in American Society of Testing Materialswood decay resistance class from slightly resistant to highly resistant; and no significant changes in resistance against the dry-wood termites Cryptotermes brevis were found.
Alden H (1995) Hardwoods of North America. General
Technical Report FPL-GTR-83. Madison, WI.
Andrade FA, Calonego FW, Severo ETD, Furtado EL (2012)
Selection of fungi for accelerated decay in stumps of
Eucalyptus spp. Biores Technol 110:456-461.
ASTM E-308 (1999) Standard practice for computing the
colors of objects by using the CIE system. American
Society for Testing and Materials, West Conshohocken,
ASTM D-1413 (2007) Standard test method for wood preservatives by laboratory soil-block cultures. American
Society for Testing and Materials, West Conshohocken,
ASTM D-2017 (2008) Standard method of accelerated
laboratory test of natural decay resistance of wood.
American Society for Testing and Materials, West Conshohocken, PA.
Atlanta Hardwoods (2018) Atlanta Hardwood Corporation
expands, adding thermally modified wood production
production-capacity/. Accessed 23 August 2018.
Bekhta P, Niemz P (2003) Effect of high temperature on the
change in color, dimensional stability and mechanical
properties of spruce wood. Holzforschung 57:539-546.
Buchanan MA, Dickey EE (1960) Liriodenine, a nitrogen containing pigment of yellow poplar heartwood (Liriodendron
tulipqera, L.). J Org Chem 25(8):1389-1391.
Calonego FW, Severo ETD, Furtado EL (2010) Decay resistance
of thermally-modified Eucalyptus grandis wood at 140°C, 160°C, 180°C, 200°C and 220°C. Biores Technol 101:9391-9394.
Camargos JAA, Gonçalez JC (2001) A colorimetria aplicada
como instrumento na elaboração de uma tabela de cores
de madeira. Bras Florest 71:30-41 (In Portuguese with
summary in English).
Espinoza O, Buehlmann U, Lagurda-Mallo MF (2015)
Thermally modified wood: Marketing strategies of U.S.
producers. BioResources 10(4):6942-6952.
Esteves B, Pereira H. (2009) Wood modification by heat
treatment: A review. BioResources 4(1):370-404.
Gonçalves FG, Pinheiro DTC, Paes JB, de Carvalho AG,
Oliveira GL (2013) Durabilidade natural de especies
florestais madeireiras ao ataque de cupim de madeira seca.
Floresta Ambient 20(1):110-116.
IPT-1157 (1980) Ensaio acelerado da resistencia natural ou
de madeira preservada ao ataque de termitas do genero
Cryptotermes (Fam. Kalotermitidae). Instituto de Pesquisas
Tecnologicas, São Paulo, Brazil (In Portuguese).
Mburu F, Dumarçay S, Huber F, Petrissans M, Gerardin P
(2007) Evaluation of thermally modified Grevillea robusta
heartwood as an alternative to shortage of wood resource in
Kenya: Characterization of physicochemical properties
and improvement of bio-resistance. Biores Technol 98:
Meints T, Teischinger A, Stingl R, Hansmann C (2017)
Wood colour of central European wood species: CIELAB
characterization and colour intensification. Eur J Wood
Wood Prod 75:499-509.
Metsa-Kortelainen S, Anitikainen T, Viitaniemi P (2006) The
water absorption of sapwood and heartwood of Scots pines
and Norway spruce heat-treated at 170°C, 190°C, 210°C
and 230°C. Holz Roh Werkst 64:192-197.
Mitsui K, Murata A, Tolvaj L (2004) Changes in the
properties of light-irradiated wood with heat treatment:
Part 3. Monitoring by DRIFT spectroscopy. Holz Roh
Northland Forest Products (2018) Cambia: What is thermally
modified wood. http://cambiawood.com//about-our-wood/
thermally-modified-wood. Accessed 23 August 2018.
Oliver-Villanueva JV, Gascon-Garrido P, Ibiza-Palacios MS
(2013) Evaluation of thermally-treated wood of beech
(Fagus sylvatica L.) and ash (Fraxinus excelsior L.)
against Mediterranean termites (Reticulitermes spp.). Eur J
Wood Wood Prod 71:391-393.
Pessoa AMC, Berti Filho EB, Brito JO (2006) Avaliação da
madeira termorretificada da madeira de Eucalyptus
grandis submetida ao ataque de cupim de madeira seca,
Cryptotermes brevis. Sci For 72:11-16 (In Portuguese with
summary in English).
Salca EA, Hiziroglu S (2014) Evaluation of hardness and
surface quality of different wood species as function of
heat treatment. Mater Des 62:416-423.
Schirp A, Wolcott MP (2005) Influence of fungal decay and
moisture absorption on mechanical properties of extruded
wood-plastic composites. Wood Fiber Sci 37(4):643-652.
Severo ETD, Calonego FW (2011) Processo de modificação
termica, por irradiação de calor, para a melhora da estabilidade dimensional e da durabilidade biologica de madeira solida. INPI Patent PI0902/38-8A2 (In Portuguese).
Severo ETD, Calonego FW, Sansigolo CA (2012) Physical
and chemical changes in juvenile and mature woods of
Pinus elliottii var. elliottii by thermal modification. Eur J
Wood Wood Prod 70:741-747.
Severo ETD, Calonego FW, Sansıgolo CA, Bond B (2016)
Changes in the chemical composition and decay resistance
of thermally-modified Hevea brasiliensis wood. PLoS
Shi JL, Kocaefe D, Amburgey T, Zhang J (2007) A comparative
study on brown-rot fungus decay and subterranean
termite resistance of thermally modified and
ACQ-C treated wood. Holz Roh Werkst 65:353-358.
Sundqvist B, Moren T (2002) The influence of wood
polymers and extractives on wood colour induced by
hydrothermal treatment. Holz Roh Werkst 60:375-376.
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