Mou’ad A. Tarawneh, Adilah Mat Ali, Sahrim Hj Ahmad and L.J. Yu
The purpose of this paper is to study the effects of multi-walled carbon nanotubes (MWCNTs) loading on the thermal conductivity of nanocomposites.
Abstract
Purpose
The purpose of this paper is to study the effects of multi-walled carbon nanotubes (MWCNTs) loading on the thermal conductivity of nanocomposites.
Design/methodology/approach
In this paper, the polymer nanocomposite of MWCNT nanoparticles incorporated with PLA and LNR as compatibilizer were prepared via melt blending method.
Findings
The result has shown that the sample with 3.5 wt.% of MWCNT content provided higher thermal conductivity which is believed to be the optimum loading that formed the suitable percolated network for phonon conduction facilitation because of better dispersion in the PLA/LNR matrix as confirmed by SEM micrograph.
Originality/value
Thermal conductivity of polylactic acid (PLA)/liquid natural rubber (LNR) matrix improved with MWCNT.
Details
Keywords
Ing Kong, Robert Shanks, Sahrim Ahmad and Lih-Jiun Yu
The effect of multiwalled carbon nanotubes (MWCNTs)-magnetite (Fe3O4) hybrid content on the magnetic and dynamic mechanical properties of thermoplastic polypropylene-natural…
Abstract
The effect of multiwalled carbon nanotubes (MWCNTs)-magnetite (Fe3O4) hybrid content on the magnetic and dynamic mechanical properties of thermoplastic polypropylene-natural rubber (TPNR) nanocomposites was evaluated. The effect of acid treatment of MWCNTs on the properties of nanocomposites has also been examined. TPNR/fillers nanocomposites were prepared via a Thermo Haake internal mixer using melt blending method with ball-milling technique as a pre-mixed process. The acid treatment successfully shortened the lengths and disentangled the crowds of MWCNTs. The improved dispersion of acid-treated MWCNTs-Fe3O4 in TPNR matrix and the enhanced interfacial adhesion between acid-treated MWCNTs-Fe3O4 and TPNR matrix increased the magnetic and dynamic mechanical properties. Acid-treated MWCNTs-Fe3O4 filled TPNR shows 10% improvement in storage modulus over neat TPNR due to the fine dispersion of MWCNTs in the TPNR matrix.
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Mou’ad. A. Tarawneh, L. J. YU, Musab A. Tarawni, Sahrim Hj. Ahmad, O. Al-Banawi and Mohammad A. Batiha
This paper examines the enhancement in the properties of thermoplastic elastomer (TPE) reinforced by graphene nanoplates (GNPs). TPE is a blend of polypropylene (PP), natural…
Abstract
This paper examines the enhancement in the properties of thermoplastic elastomer (TPE) reinforced by graphene nanoplates (GNPs). TPE is a blend of polypropylene (PP), natural rubber (NR) and liquid natural rubber (LNR), which is used as a compatibiliser at a percentage of volume ratio 70:10:20, respectively. Using TPE as the host matrix, TPE/GNPs nanocomposites are processed, and the mechanical, electrical and structural properties are characterised. The results extracted from the tensile and the impact tests showed that the tensile strength, Young’s modulus and the impact strength of the nanocomposites also increased as the filler loading increased until an optimum value of filler loading was reached. Based on the experimental results, GNPs strongly affected the electrical conductivity due to disruption of the GNPs percolated network. It is believed that the high aspect ratio of GNPs is a critical issue concerning the constitution of a special interface region between the GNPs and TPE matrix and the high performance of the composites.
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Siti Mazlita Yamaludin, Sharifah Faigah Syed Alwi, Romzie Rosman and Mohd Rahim Khamis
This study aims to explore the COVID-19 impact on the sustainability of gharimin (genuine debtors) in Islamic financial institutions (IFI) in Malaysia. The analysis was further…
Abstract
Purpose
This study aims to explore the COVID-19 impact on the sustainability of gharimin (genuine debtors) in Islamic financial institutions (IFI) in Malaysia. The analysis was further conducted to expand the interpretation of gharimin in zakat institutions (ZI) to use the role of zakat distribution during the post-pandemic period due to income shock and long-term unemployment.
Design/methodology/approach
This study adopted a qualitative research approach with grounded theory analysis to integrate theoretical insights into the interpretation of gharimin and current practices from the perspectives of ZI and IFI. An in-depth interview with 18 informants was conducted, and data were collected from senior management positions in the zakat distribution department, academicians who are experts in the area of zakat, and heads of Shariah departments in IFI.
Findings
Expanding the interpretation of gharimin could help ZI and IFI recover the sustainability of gharimin for preparedness during post-pandemic and any emergency crisis in the future.
Practical implications
This study implies the potential role of ZI in combating the risk of defaulting debtors in IFI to prepare for pandemic recovery in the future.
Social implications
The new interpretation assists gharimin in reducing the burden debt using the zakat fund and protects genuine debtors by preventing IFI from declaring default or bankruptcy.
Originality/value
This study narrows the literature gaps about gharimin in IFI in the context of the pandemic. To the best of the authors’ knowledge, this is, perhaps, the first paper to present the expansion of interpretation for gharimin into mu’sir in IFI in Malaysia.