Main Article Content
This paper presents the electromagnetic wave (EW) absorption properties in terms of complex permittivity and permeability of novel green composites coconut fiber coir and charcoal powder materials. The samples were fabricated using the raw agricultural waste coconut fiber coir, charcoal powder, epoxy resin and hardener with varied composition. The dielectric properties of the materials were characterized using two-port waveguide measurement method over the X-band frequency (8.2 – 12.4GHz). The average permittivity value measured is approximately 3.00 with 10wt% charcoal has the highest permittivity of 3.59. Apart from that, all samples exhibit good reflection loss of better than -25dB which means more than 99% absorption rate. The result shows the composite material is a promising organic material for electromagnetic absorber applications.
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
- F. M. Idris, M. Hashim, Z. Abbas, I. Ismail, R. Nazlan, and I. R. Ibrahim, "Recent developments of smart electromagnetic absorbers based polymer-composites at gigahertz frequencies," J. Magn. Magn. Mater., vol. 405, pp. 197–208, 2016.
- S. T. Liu, K. K. Yan, Y. H. Zhang, S. Di Jin, Y. Ye, and X. G. Chen, "Magnesiothermic reduction of rice husk ash for electromagnetic wave adsorption," J. Magn. Magn. Mater., vol. 394, pp. 266–273, 2015.
- Y. Ding, Q. Liao, S. Liu, H. Guo, Y. Sun, and G. Zhang, "Reduced Graphene Oxide Functionalized with Cobalt Ferrite Nanocomposites for Enhanced Efficient and Lightweight Electromagnetic Wave Absorption," Nat. Publ. Gr., no. April, pp. 1–9, 2016.
- X. Du, Z. Zhang, W. Liu, and Y. Deng, "Nanocellulose-based conductive materials and their emerging applications in energy devices - A review," Nano Energy, vol. 35, no. April, pp. 299–320, 2017.
- L. Y. Seng, F. H. Wee, H. A. Rahim, M. AbdulMalek, Y. K. You, Z. Liyana, and A. A. M. Ezanuddin, "Design of multiple-layer microwave absorbing structure based on rice husk and carbon nanotubes," Appl. Phys. A, vol. 123, no. 1, p. 73, 2017.
- Z. Liyana, F. Malek, H. Nornikman, N. A. Mohd Affendi, L. Mohamed, N. Saudin, and A. A. Ali, "Investigation of sugar cane bagasse as alternative material for pyramidal microwave absorber design," IEEE Symp. Wirel. Technol. Appl. ISWTA, pp. 66–70, 2012.
- B. Smythe, S. Casserly, and D. Arakaki, "Organic-based microwave frequency absorbers using corn stover," IEEE Antennas Propag. Soc. AP-S Int. Symp., pp. 920–921, 2014.
- R. Kaur, G. D. Aul, and V. Chawla, "Improved Reflection Loss Performance of Dried Banana Leaves Pyramidal Microwave Absorbers by Coal for Application in Anechoic Chambers," vol. 43, no. July, pp. 157–164, 2015.
- I. R. M. Noordin, H. Abdullah Idris, M. N. Taib, J. Md Sharif, A. D. Rosli, A. Zanal, and A. T. Abdullah, "Investigation of oil palm ash microwave absorber for broadband application," Proc. - 2012 IEEE 8th Int. Colloq. Signal Process. Its Appl. CSPA 2012, pp. 232–235, 2012.
- B. S. Yew and F. H. Wee, "A GRICULTURAL W ASTE BASED -COCO PEAT M ICROWAVE," Int. J. Eng. Sci. Emerg. Technol., vol. 7, no. 2, pp. 547–554, 2014.
- "Agilent Basics of Measuring the Dielectric Properties of Materials," 5989–2589EN, 2013.
- S. Kashi, R. K. Gupta, T. Baum, N. Kao, and S. N. Bhattacharya, "Dielectric properties and electromagnetic interference shielding effectiveness of graphene-based biodegradable nanocomposites," Mater. Des., vol. 109, pp. 68–78, 2016.