25APR

FLORAM receives Impact Factor

We are pleased to announce that FLORAM has received its first impact factor rating in the 2022 Journal Citation Reports (JCR).

Now FLORAM has the highest impact factor among Brazilian Forest Sciences journals.

Floresta e Ambiente
https://www.floram.org/article/doi/10.1590/2179-8087.084117
Floresta e Ambiente
Original Article Wood Science and Technology

Physical Properties of Thermally Modified Juvenile and Mature Wood of Hevea brasiliensis (Euphorbiaceae)

Fred Willians Calonego; Elias Taylor Durgante Severo; João Vicente de Figueiredo Latorraca; Brian H. Bond

Downloads: 0
Views: 784

Abstract

Abstract: Exposing timber to temperatures approaching 200 °C causes thermal modification and changes its characteristics. This study evaluates the effect of various levels of thermal treatment on the physical properties of juvenile and mature wood from rubber tree (Hevea brasiliensis). Boards taken from 53-year-old rubber trees were thermally modified at up to 220 °C. Thermal treatment caused decreases on the oven-dried density, equilibrium moisture content, and swellings on juvenile and mature woods of H. brasiliensis. Influence of thermal modification at 180-200 °C in juvenile wood was lower than in mature wood, whereas the treatment at 220 °C caused a greater variation in properties of juvenile wood. The thermally modified wood is a suitable product for use in environments with high levels of relative humidity.

Keywords

thermal modification, rubber wood, maximum swellings, density of wood, equilibrium moisture content

References

Almeida G, Hernández RE. Changes in physical properties of tropical and temperate hardwoods below and above fiber saturation point. Wood Science and Technology 2006; 40: 599-613. 10.1007/s00226-006-0083-8

Arnold M. Effect of moisture on the bending properties of thermally modified beech and spruce. Journal of Material Science 2010; 45: 669-680. 10.1007/s10853-009-3984-8

Associação Brasileira de Normas Técnicas - ABNT. ABNT NBR 7190: projeto de estruturas de madeira. Rio de Janeiro; 1997.

Bächle H, Zimmer B, Windeisen E, Wegener G. Evaluation of thermally modified beech and spruce wood and their properties by FT-NIR spectroscopy. Wood Science and Technology 2010; 44: 421-433. 10.1007/s00226-010-0361-3

Bao FC, Jiang ZH, Jiang XM, Lu XX, Luo XQ, Zhang SY. Differences in wood properties between juvenile wood and mature wood in 10 species grown in China. Wood Science and Technology 2001; 35: 363-375. 10.1007/s002260100099

Bendtsen BA. Properties of wood from improved and intensively managed trees. Forest Products Journal 1978; 28: 61-72.

Brito JO, Silva FG, Leão MM, Almeida G. Chemical composition changes in eucalyptus and pinus woods submitted to heat treatment. Bioresource Technology 2008; 99(18): 8545-8548. 10.1016/j.biortech.2008.03.069

Calonego FW, Severo ETD, Assi PP. Mensuração do comprimento das fibras para a determinação da madeira juvenil em Eucalyptus citriodora. Scientia Forestalis 2005; 68: 113-121.

Calonego FW, Severo ETD, Ballarin AW. Physical and mechanical properties of thermally-modified wood from Eucalyptus grandis. European Journal of Wood and Wood Products 2012; 70(4): 453-460. 10.1007/s00107-011-0568-5

Calonego FW, Severo ETD, Latorraca JVF. Effect of thermal modification on the physical properties of juvenile and mature woods of Eucalyptus grandis. Floresta e Ambiente 2014; 21(1): 108-113. 10.4322/floram.2014.004

Calonego FW, Severo ETD, Sansígolo CA, Rezende MA, Bruder EM, Costa VE. Calorific value and chemical properties in juvenile and mature wood of thermally-modified Eucalyptus grandis. Drvna Industrija 2016; 67(3): 207-214. 10.5552/drind.2016.1522

Cown DJ. Corewood (Juvenile wood) in Pinus radiata - should we be concerned? New Zealand Journal of Forestry Science 1992; 22(1): 87-95.

Esteves B, Marques AV, Domingos I, Pereira H. Influence of steam heating on the properties of pine (Pinus pinaster) and eucalypt (Eucalyptus globulus) wood. Wood Science and Technology 2007; 41: 193-207. 10.1007/s00226-006-0099-0

Esteves B, Pereira H. Wood modification by heat treatment: a review. BioResources 2009; 4(1): 370-404.

Ferreira AL, Severo ETD, Calonego FW. Determination of fiber length and juvenile and mature wood zones from Hevea brasiliensis trees grown in Brazil. European Journal of Wood and Wood Products 2011; 69: 659-662. 10.1007/s00107-010-0510-2

Indústria Brasileira de Árvores - IBÁ. Relatório Ibá 2015. São Paulo: Pöyry; 2015.

Kadir AA, Sudin R. Carbohydrates in rubberwood (Hevea brasiliensis Muell.). Holzforschung 1989; 43(3): 173-178. 10.1515/hfsg.1989.43.3.173

Korošec RC, Lavrič B, Rep G, Pohleven F, Bukovec P. Thermogravimetry as a possible tool for determining modification degree of thermally treated Norway spruce wood. Journal of Thermal Analysis and Calorimetry 2009; 98: 189-195. 10.1007/s10973-009-0374-z

Latorraca JVF, Dünisch O, Koch G. Chemical composition and natural durability of juvenile and mature heartwood of Robinia pseudoacacia L. Anais da Academia Brasileira de Ciências 2011; 83(3): 1059-1068. 10.1590/S0001-37652011005000016

Lobão MS, Costa DP, Almonacid MAA, Tomazello Filho M. Wood quality of Schizolobium parahyba var. amazonicum trees, state of Acre, Brazil. Floresta e Ambiente 2012; 19(3): 374-384.

Matan N, Kyokong B. Effect of moisture content on some physical and mechanical properties of juvenile rubberwood (Hevea brasiliensis Muell. Arg.). Songklanakarin Journal of Science and Technology 2003; 25(3): 327-340.

Mburu F, Dumarçay S, Bocquet JF, Petrissans M, Gérardin P. Effect of chemical modifications caused by heat treatment on mechanical properties of Grevillea robusta wood. Polymer Degradation and Stability 2008; 93(2): 401-405. 10.1016/j.polymdegradstab.2007.11.017

Naji HR, Sahri MH, Nobuchi T, Bakar ES. The effect of growth rate on wood density and anatomical characteristics of rubberwood (Hevea brasiliensis Muell. Arg.) in two different clonal trails. Journal of Natural Product and Plant Resources 2011; 1(2): 71-80.

Palermo GPM, Latorraca JVF, Carvalho AM, Calonego FW, Severo ETD. Anatomical properties of Eucalyptus grandis wood and transition age between the juvenile and mature woods. European Journal of Wood and Wood Products 2015; 73: 775-780. 10.1007/s00107-015-0947-4

Ratnasingam J, Ioras F. Effect of heat treatment on the machining and other properties of rubberwood. European Journal of Wood and Wood Products 2012; 70: 759-761. 10.1007/s00107-011-0587-2

Severo ETD, Calonego FW. Thermal modification process for heat radiation to improve the dimensional stability and biological durability of solid wood. Rio de Janeiro: INPI; 2009. Patent PI0902138-8A2.

Severo ETD, Calonego FW, Sansígolo CA. Physical and chemical changes in juvenile and mature woods of Pinus elliottii var. elliottii by thermal modification. European Journal of Wood and Wood Products 2012; 70: 741-747. 10.1007/s00107-012-0611-1

Severo ETD, Calonego FW, Sansígolo CA, Bond B. Changes in the chemical composition and decay resistance of thermally-modified Hevea brasiliensis wood. PLoS ONE 2016; 11(3): e0151353. 10.1371/journal.pone.0151353

Severo ETD, Oliveira EF Jr, Sansígolo CA, Rocha CD, Calonego FW. Properties of juvenile and mature woods of Hevea brasiliensis untapped and with tapping panels. European Journal of Wood and Wood Products 2013; 71: 815-818. 10.1007/s00107-013-0731-2

Shanks RA, Gunaratne LMWK. Gelatinization and retrogradation of thermoplastic starch characterized using modulated temperature differential scanning calorimetry. Journal of Thermal Analysis and Calorimetry 2011; 106: 93-99. 10.1007/s10973-011-1620-8
 

5eb94ba10e88258669c7a683 floram Articles
Links & Downloads

FLORAM

Share this page
Page Sections