Dielectric Response of Borassus flabellifier Wood at Different Moisture Content

Abstract:

The dielectric properties for Borassus Flabellifier BF wood were determined in the longitudinal and perpendicular directions of fibbers at different moisture content. The wood parts of male and female Borassus Flabellifier tree were taken from where the natural liquid Neera collected overnight. The wood parts were dried by microwave oven from 25 percent moisture content to oven dried condition. The dielectric parameters were measured by four-probe method. All the measurement was taken on frequency 105 Hz at room temperature 3110K. The Results indicate that the longitudinal values were nearly same as perpendicular directions of fibbers for both dielectric properties and dielectric conductivity with moisture content. In this study the drying of wood done by microwave energy using a continuous microwave drier was compared to that by conventional method. Characterization of the samples was made by scanning electron microscope (SEM) Model JEOL JSM5400. The specimen’s were collected from Dhar Dist. (M.P.) India.

• Periodical: Advanced Materials Research (Volumes 347-353)
• Pages: 1488-1493
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.347-353.1488
• Online since: October 2011
• Authors: Sushil Phadke, B.D Shrivastava, Ashutosh Mishra, N Dagaonkar
• Keywords: Dielectric Conductivity, Dielectric Constant, Dielectric Loss Tangents, Moisture Content, Scanning Electron Microscope (SEM)

References

[1] S.N. Sanyal, V.K. Jain, Y.M. Dubey, and P.C. Verma, A preliminary note on Relationship between dielectric properties and thermal conductivity of wood, J. Ind. Acad. Wood Sci. 22 (1991) 45-49.

[2] H.M. Gu, structure based, two- dimensional anisotropic , transient heat conduction model for wood, Ph.D. dissertation, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, (2001).

[3] H.M. Gu and A. Zink-Sharp: Geometric model for softwood transverse thermal conductivity, part 1, Wood and Fiber Sci., 37, (2005), pp.699-711.

[4] P. Martin, R. Collet, P. Barthclemy and G. Roussy: Evaluation of wood characteristics, Internal scanning of the material by microwaves, Wood Sci. Tech., 21 (1987) 361-371.

DOI: 10.1007/bf00380203

[5] M.F. Kabir, W.M. Daud, K.B. Khalid and H.A.A. Sidek: Dielectric and ultrasonic properties of rubber wood, effect of moisture content, grain direction and frequency, Holz Roh Werkst, 56, (1998), pp.223-227.

DOI: 10.1007/s001070050305

[6] H. Sahin and N. Ay: Dielectric properties of hardwood species at microwave frequencies, J. Wood Sci., 50, (2004), 375-380.

DOI: 10.1007/s10086-003-0575-1

[7] M.D. Wan, B. Kaida, and A.A. Sidek, Temperature dependence of the dielectric properties of rubber wood. Wood and Fibre Science, Vol. 33(2) (2001), pp.233-238.

[8] Reimer & Ludwig: Scanning electron microscopy, Springer series in optical sciences, Vol. 45, (1998).

[9] N. Chand, D. Jain and A. Nigrawal: Investigations on gradient a.c. conductivity characteristics of bamboo, Bull. Mater. Sci. Vol 29, No. 2, (2006), pp.193-196.

DOI: 10.1007/bf02704615