Mohd Hanif Mohd Pisal
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Preferred name
Mohd Hanif Mohd Pisal
Official Name
Mohd Hanif , Mohd Pisal
Alternative Name
Mohd Pisal , Mohd Hanif
Pisal, Mohamad Hanif Mohd
Pisal, M. H.M.
Main Affiliation
Scopus Author ID
56239228100
Researcher ID
GFX-4850-2022

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The role of zinc chloride in enhancing mechanical, thermal and electrical performance of ethylene vinyl acetate/carbonized wood fiber conductive composite

2021-02-02 , Mohd Hanif Mohd Pisal , Azlin Fazlina Osman , Tan Soo Jin , Rozyanty Rahman , Alrashdi A.A. , Masa A.

Carbonized natural filler can offer the production of low cost composites with an eco-friendliness value. The evolving field of electronics encourages the exploration of more functions and potential for carbonized natural filler, such as by modifying its surface chemistry. In this work, we have performed surface modification on carbonized wood fiber (CWF) prior to it being used as filler in the ethylene vinyl acetate (EVA) composite system. Zinc chloride (ZnCl2) with various contents (2 to 8 wt%) was used to surface modify the CWF and the effects of ZnCl2 composition on the surface morphology and chemistry of the CWF filler were investigated. Furthermore, the absorptive, mechanical, thermal, and electrical properties of the EVA composites containing CWF-ZnCl2 were also analyzed. SEM images indicated changes in the morphology of the CWF while FTIR analysis proved the presence of ZnCl2 functional groups in the CWF. EVA composites incorporating the CWF-ZnCl2 showed superior mechanical, thermal and electrical properties compared to the ones containing the CWF. The optimum content of ZnCl2 was found to be 6 wt%. Surface modification raised the electrical conductivity of the EVA/CWF composite through the development of conductive deposits in the porous structure of the CWF as a channel for ionic and electronic transfer between the CWF and EVA matrix.

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Effect of stretching rate on tensile response and crystallization behavior of crosslinked natural rubber

2021-01-01 , Masa A. , Hayeemasae N. , Soontaranon S. , Mohd Hanif Mohd Pisal , Rasidi M.S.M.

The performance of natural rubber (NR) relies heavily on the microstructural changes during deformation. This has brought to significant change in the stress response of NR. Besides, the stretching rate may also affect the stress response of NR. In this study, effects of stretching rate on tensile deformation and strain-induced crystallization of crosslinked NR were investigated. Results indicated that increasing the strain rate has increased the stress at given strain where the onset of strain-induced crystallization was shifted to a lower strain. The crystallinity of the crosslinked NR was shown to be higher at a high stretching rate and it corresponded well with the tensile response. The results clearly confirm that chain orientation and crystallization became stronger with increasing deformation rate. The study also suggests that the deformation could improve distribution of crosslinked network structures.

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Mechanical properties of poly-(hydroxybutyrate- co -valerate)/natural rubber/cellulose nanocrystal (PHBV/NR/CNC) nanocomposites prepared by using two-roll mill method

2024-04-01 , Lim K.C. , Halim N.A.S.A. , Mahamud S.N.S. , Osman A.F. , Mohd Hanif Mohd Pisal , Masa A.

Poly (hydroxybutyrate-co-valerate) (PHBV) was the ideal replacement for petroleum-based plastic, owing to its biocompatible, non-toxicity and naturally by bacteria. However, PHBV has high brittleness due to high crystallinity, becoming a major challenge for PHBV commercial production and limiting its use in molded products. Natural rubber (NR) and cellulose nanocrystal (CNC) created an excellent opportunity to enhance the modulus and minimize the effect of non-degradable materials utilized in the polymer matrix. This study demonstrates the formation of PHBV/NR/CNC ternary nanocomposites to obtain a commodity biomaterial with improved mechanical properties. The effects of CNC loadings (1, 3, 5 wt.%) on the mechanical properties and structure of the PHBV/NR/CNC nanocomposites were investigated. Based on the tensile test, the use of the CNC brought a more pronounced positive impact (especially 1wt.% CNC) to the PHBV/NR blend matrix, where it enhanced the tensile Young's modulus of the PHBV/NR/CNC nanocomposites. Fourier transform infrared spectroscopy (FTIR) confirmed the success of peroxide crosslinking after the melt compounding process by using a heated two-roll mill.

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