UPM Institutional Repository

Moisture content of kenaf (hibiscus cannabinus l.) stem based on microwave dielectric properties


Citation

Radzuan, Mohd Nazren (2013) Moisture content of kenaf (hibiscus cannabinus l.) stem based on microwave dielectric properties. Masters thesis, Universiti Putra Malaysia.

Abstract

This research investigated the relationship between microwave the dielectric properties of kenaf plant and it‘s MC for purpose of developing an in-situ sensor for the measurement of kenaf stem fibre MC. The rectangular waveguide resonator method was used to determine the dielectric properties of kenaf stems and the results were compared with those of the oven dried method of various drying times. The relationship between the dielectric properties and MC and frequency were investigated. The dielectric constant, ε‘ and loss facor, ε‖ in the kenaf stem, core and bast at frequencies 8.7875 GHz and 10.1882 GHz showed cubic relationship with MC. The equation for in-situ MC determination in kenaf stem was established and compared with those of the conventional drying method to evaluate the accuracy of the new equation established. The R2 value for kenaf stem samples at B, M and T portion at frequency show strong relationship that is above 0.9 compared with kenaf core and bast samples. In bast, the correlation between dielectric properties with MC was not good thus the MC determination equation cannot be established. The ability of this technique to determine the kenaf stem MC accurately and rapidly will not only help in improving the efficiency of decorticator machine in kenaf processing,but also in improving fibre quality and market price of kenaf fibre.


Download File

[img]
Preview
PDF
FK 2013 16R.pdf

Download (1MB) | Preview

Additional Metadata

Item Type: Thesis (Masters)
Subject: Fiber
Subject: Kenaf
Call Number: FK 2013 16
Chairman Supervisor: Associate Professor Khalina Abdan, PhD
Divisions: Faculty of Engineering
Depositing User: Haridan Mohd Jais
Date Deposited: 19 Jul 2016 04:47
Last Modified: 19 Jul 2016 04:47
URI: http://psasir.upm.edu.my/id/eprint/47560
Statistic Details: View Download Statistic

Actions (login required)

View Item View Item