Some physical properties of delignified and compressed Melia dubia wood
DOI:
https://doi.org/10.19182/bft2019.341.a31758Keywords
compressed wood, delignification, set recovery, thickness loss, IndiaAbstract
This study explores the effects of delignification in improving some physical properties of compressed wood. Blocks of six year-old plantation-grown Melia dubia wood (density = 0.39 g/cm3) were delignified in an alkaline solution of NaOH and Na2SO3 for 4 h. The delignified wood blocks were dried to 12% moisture content and compressed at two temperatures (120 °C and 150 °C) for 2 hours and 4 hours. Improvements in density, set recovery (%) and thickness loss (%) after compression were observed and compared with the non-delignified samples. The mean density of delignified and compressed (DCW) wood was 0.825 g/cm3 (SD = 0.109); for compressed wood without delignification (CW), the mean density was 0.889 g/cm3 (SD = 0.049). These densities differ significantly, with the DCW samples showing very low set recovery (2.97% to 5.22%), while comparatively, the CW wood samples showed very high set recovery (48.47% to 38.05%). Average loss of thickness (%) in the DCW samples varied from 47.22% to 52.26%, and was approximately 10% higher (58.77% to 61.91%) in the CW samples with no delignification.
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Abe H., Funada R., Kuroda N., Furusawa O., 2001. Confocal laser scanning microscopy of water uptake during the recovery of compressed and drying-set wood. IAWA Journal, 22 (1): 63-72. https://doi.org/10.1163/22941932-90000264
Dwianto W., Morooka T., Norimoto M., Kitajima T., 1999. Stress relaxation of sugi (Cryptomeria japonica D. Don) wood in radial compression under high temperature steam. Holzforschung, 53 (5): 541-546. https://doi.org/10.1515/HF.1999.089
Esteves B., Ribeiro F., Cruz-Lopes L., Domingos J. F. I., 2017. Densification and heat treatment of maritime pine wood. Wood Research, 62 (3): 373-388. http://ce3c.ciencias.ulisboa.pt/research/publications/ver.php?id=833
Higashihara T., Morooka T., Hirosawa S., Norimoto M., 2004. Relationship between changes in chemical components and permanent fixation of compressed wood by steaming or heating. Mokuzai Gakkaishi, 50: 159-167. https://jglobal.jst.go.jp/en/detail?JGLOBAL_ID=200902214551284397&rel=0
Hwang S., Lee W., 2011. Hardness and Dimensional Stability of Radiata Pine (Pinus radiata D. Don) Heat-Compressed Wood - Effect of Press Temperature & Time. Journal of the Korean Wood Science and Technology, 39 (3): 206-212. http://www.jwst.or.kr/past/list_sub.asp?srcCate=&i_key=6021&p_key=3020&v_key=39&n_key=3&n_key1=3&i_kname=&p_name=
Inoue M., Ogata S., Kawai S., Rowell R. M., Norimoto M., 1993a. Fixation of Compressed Wood Using Melamine-Formaldehyde Resin. Wood and Fiber Science, 25 (4): 404-410. https://wfs.swst.org/index.php/wfs/article/view/623/623
Inoue M., Norimoto M., Tanahashi M., Rowell R. M., 1993b. Steam or heat fixation of compressed wood. Wood and Fiber Science, 25 (3): 224-235. https://wfs.swst.org/index.php/wfs/article/view/288
Ito Y., Tanahashi M., Shigematsu M., Shinoda Y., 1998. Compressive-molding of wood by high-pressure steam-treatment. Part 2: Mechanism of permanent fixation. Holzforschung - International Journal of the Biology, Chemistry, Physics and Technology of Wood, 52 (2): 217-221. https://doi.org/10.1515/hfsg.1998.52.2.217
JieYing W., GuangJie Z., Iida I., 2000. Effect of oxidation on heat fixation of compressed wood of China fir. Forestry Studies in China, 2 (1): 73-79.
Kumar S., Bhushan U. K., Mishra A. K., Jena S. K., 2018. Variability in physical properties of plantation-grown progenies of Melia composita and determination of a kiln drying schedule. Journal of Forestry Research, 29: 1435-1442. https://doi.org/10.1007/s11676-017-0527-z
Morsing N., Hoffmeyer P., 1998. Densification of Wood. The influence of hygrothermal treatment on compression of beech perpendicular to gain. Kongens Lyngby, Denmark, Technical University of Denmark (DTU). http://orbit.dtu.dk/en/publications/densification-of-wood(5e00be8d-891d-4a4d-b5e8-102e7bbaeadd).html
Navi P., Girardet F., 2000. Effects of thermo-hydro-mechanical treatment on the structure and properties of wood. Holzforschung - International Journal of the Biology, Chemistry, Physics and Technology of Wood, 54 (3): 287-293. https://doi.org/10.1515/HF.2000.048
Sandermann W., Augustin H., 1964. Chemical investigations on the thermal decomposition of wood. Part III: Chemical investigation on the course of decomposition. Holz als Roh- und Werkstoff, 22: 377-386. https://doi.org/10.1007/BF02628346
Senol S., Budakci M., 2016. Mechanical wood modification method. Mugla Journal of Science and Technology, 2 (2): 53-59. http://dergipark.ulakbim.gov.tr/muglajsci/article/view/5000205925
Song J., Chen C., Zhu S., Zhu M., Dai J., Ray U., 2018. Processing bulk natural wood into a high-performance structural material. Nature, 554 (8): 224-228. https://doi.org/10.1038/nature25476
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