The Research on the Longitudinal Tensile Strength of Tracheids of Brown-Rotted Chinese Fir

Abstract:

Using Zero-span tensile test technique, measurements of the longitudinal tensile strength of tracheids of brown-rotted Chinese fir were obtained in the present work. The results showed that the longitudinal tensile strength of tracheids reduced with the increase of exposure time. The absolute value of reduced tensile strength was not remarkable because of low degradation efficiency. The FTIR spectroscopy results shows that brown-rot fungus did degraded the cellulose and hemicellulose of Chinese fir, explaining the reduction of tensile strength of tracheids. The intensities of the characteristic aromatic lignin peak at 1512 cm-1 was not increased but decreased, which was very strange, hinting the reason of that is not clearly illustrate by the FTIR spectra only.

• Periodical: Advanced Materials Research (Volumes 183-185)
• Pages: 2014-2018
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.183-185.2014
• Online since: January 2011
• Authors: Xian Bao Cheng, Rong Jun Zhao, Wei Wei Shangguan
• Keywords: Brown Rot, Chinese Fir, FT-IR, Longitudinal Tensile Strength, Zero-Span Test

References

[1] V.D. Akker. Importance of fiber Strength in Ppaper. Tappi, 1958, 41 (8): 416-425.

[2] J.E. Stone, D.W. Clayton. The Use of Microtome Sections form Measuring the Change in Strength of Spruce Fibers Due to Pulping. Pulp and Paper Magazine of Canada. 1960: 475-484.

[3] Xiao. Jun Wang, Bo ZHANG, Ben. Hua Fei. The Application of Zero-span Tensile Testing Technique In Wood Science. Wood Processing Machinery, 2006, 3: 34-37.

[4] Yan Yu , Ben. Hua Fei, Bo ZHANG. Estinmtion of Longitudinal Tensile Strength of Tracheids with Zero-Span Tension Technique. Scientia Silvae Sinicae, 2006, 42 （7）: 83-86.

[5] Juan sun, Ben. Hua Fei, et al. The Research on The Zero-span Tensile Strength of Tracheids of The Softwood. Wood Processing Machinery, 2009, 3: 9-12.

[6] Yan Yu, et al. Factors affecting Longitudinal Tensile Strength of Softwood Tracheids Investigated with Zero-span Tension. Transaction of China Pulp and Paper, 2007, 3: 72-76.

[7] Yu. Jie Chi. FTIR Analysis on Function Groups of David Poplar Wood and Lignin Degraded by 6 Species of Wood White- Rot Fungi. Scientia Silvae Sinicae, 2005, 41 (2): 136-140.

[8] E. Jerrold, Winandy, et al. Modeling Strength loss in Wood by Chemical Composition. Part Ⅰ. An Individual Component Model for Southern Pine. Wood and Fiber Scinece, 2001, 33(2): 239-254.

[9] K. Pandey, et al. FTIR Studies of The Changes in Wood Chemistry Following Decay by Brown-rot and White-rot Fungi. International Biodeterioration & Biodegradation, 2003, 52: 151-160.

DOI: 10.1016/s0964-8305(03)00052-0

[10] Xiao. Qing Wang, Ben. Hua Fei, et al. FTIR Spectroscopic Studies of thePhoto-Discoloration of Chinese Fir. Spectroscopy and Spectral Analysis, 2009, 29（5）: 1272-1275.

[11] T.R. Filley, G. Cody, et al. Lignin Demethylation and Polysaecharide Decomposition In Spruce Sapwood Degraded by Brown rot Fungi. Organic Geochemistry, 2002, 33(2): 111-124.

DOI: 10.1016/s0146-6380(01)00144-9

[12] H. Lee et a1. Mieromorphologieal Characteristics of Decayed Wood and Laccase Produced by The Brown-rot Fungus Coniophora puteana. Jourual of Wood Science, 2004, 50 (3): 281-284.

DOI: 10.1007/s10086-003-0558-2

[13] Gai, Yun Li, Hai. Qing Ren, Te. FU Qin, Ze. Hui Jiang. Changes of Main Wood Cchemical Components During Brown-rot Decay by wolfiporia cocos. Forest Research, 2009, 22 (4): 592-596.