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2 Archives of Metallurgy and Materials

2 2022

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Mechanical and Dielectric Properties of Hybrid Carbon Nanotubes-Woven Glass Fibre Reinforced Epoxy Laminated Composites via the Electrospray Deposition Method

Zakaria Muhammad Razlan, Khairuddin Nur Aishahatul Syafiqa Mohammad, Omar Mohd Firdaus, Akil Hazizan Md, Othman Muhammad Bisyrul Hafi, Al Bakri Abdullah Mohd Mustafa, Abd Rahim Shayfull Zamree, Ting Sam Sung, Azmi Azida

Archives of Metallurgy and Materials

2022

Vol. 67, iss. 2

669--675

Herein, the effects of multi-walled carbon nanotubes (CNTs) on the mechanical and dielectric performance of hybrid carbon nanotube-woven glass fiber (GF) reinforced epoxy laminated composited are investigated. CNTs are deposited on woven GF surface using an electrospray deposition method which is rarely reported in the past. The woven GF deposited with CNT and without deposited with CNT are used to produce epoxy laminated composites using a vacuum assisted resin transfer moulding. The tensile, flexural, dielectric constant and dielectric loss properties of the epoxy laminated composites were then characterized. The results confirm that the mechanical and dielectric properties of the woven glass fiber reinforced epoxy laminated composited increases with the addition of CNTs. Field emission scanning electron microscope is used to examine the post damage analysis for all tested specimens. Based on this finding, it can be prominently identified some new and significant information of interest to researchers and industrialists working on GF based products.

Influence of Filler Surface Modification on Static and Dynamic Mechanical Responses of Rice Husk Reinforced Linear Low-Density Polyethylene Composites

Omar Mohd Firdaus, Al Bakri Abdullah Mohd Mustafa, Ting Sam Sung, Jeż Bartłomiej, Nabiałek Marcin, Md Akil Hazizan, Zulkepli Nik Noriman, Abd Rahim Shayfull Zamree, Azmi Azida

Archives of Metallurgy and Materials

2022

Vol. 67, iss. 2

507--519

Filler surface modification has become an essential approach to improve the compatibility problem between natural fillers and polymer matrices. However, there is limited work that concerns on this particular effect under dynamic loading conditions. Therefore, in this study, both untreated and treated low linear density polyethylene/rice husk composites were tested under static (0.001 s-1, 0.01 s-1 and 0.1 s-1) and dynamic loading rates (650 s-1, 900 s-1 and 1100 s-1) using universal testing machine and split Hopkinson pressure bar equipment, respectively. Rice husk filler was modified using silane coupling agents at four different concentrations (1, 3, 5 and 7% weight percentage of silane) at room temperature. This surface modification was experimentally proven by Fourier transform infrared and Field emission scanning electron microscopy. Results show that strength properties, stiffness properties and yield behaviour of treated composites were higher than untreated composites. Among the treated composites, the 5% silane weight percentage composite shows the optimum mechanical properties. Besides, the rate of sensitivity of both untreated and treated composites also shows great dependency on strain rate sensitivity with increasing strain rate. On the other hand, the thermal activation volume shows contrary trend. For fracture surface analysis, the results show that the treated LLDPE/RH composites experienced less permanent deformation as compared to untreated LLDPE/RH composites. Besides, at dynamic loading, the fracture surface analysis of the treated composites showed good attachment between RH and LLDPE.