The Effect of the Amylose/Amylopectin Contents of Starch on Porosity and Dielectric Properties of the Porous Hydroxyapatite/Starch Composites
Journal
IOP Conference Series: Materials Science and Engineering
ISSN
17578981
Date Issued
2020-07-09
Author(s)
Chong You B.
Universiti Malaysia Perlis
Abu Bakar S.
Nashrul Fazli Mohd Nasir
Universiti Malaysia Perlis
Eng Swee Kheng
Universiti Malaysia Perlis
Mohd Shukry Abdul Majid
Universiti Malaysia Perlis
Universiti Malaysia Perlis
Khor Shing Fhan
Universiti Malaysia Perlis
DOI
10.1088/1757-899X/864/1/012198
Handle (URI)
Abstract
This study aims to determine the effect of the amylose/amylopectin contents of starch on the porosity and dielectric properties of porous hydroxyapatite/starch composites. The porous hydroxyapatite/starch composites were prepared by utilizing the starches (rice, corn and potato starch) via gelatinization and retrogradation process. The complex permittivity of the porous hydroxyapatite/starch composites were evaluated in the frequency range of 12.4-18.0 GHz. The porous composites were exhibited the higher average porosity by using the starch with higher amylopectin content. The highly porous hydroxyapatite/starch composites with higher amylopectin content show the significant fluctuation peaks (at 13.8 and 16.6 GHz) and the higher imaginary part of the complex permittivity (ϵ′′) at higher frequency in the dielectric spectrum, respectively. The real (ϵ′) and imaginary part (ϵ′′) of the complex permittivity of the porous composites could be enhanced by increasing the average porosity and the amylopectin contents.
Funding(s)
Ministry of Higher Education, Malaysia
File(s)