Mohd Ridzuan Mohd Jamir
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Preferred name
Mohd Ridzuan Mohd Jamir
Official Name
Mohd Ridzuan , Mohd Jamir
Alternative Name
Ridzuan Mohd Jamir, Mohd
M Ridzuan, M. J.
Ridzuan, M. J.M.
Mohd Jamir, Mohd Ridzuan
Jamir, Mohd Ridzuan Mohd
Main Affiliation
Scopus Author ID
36069815000
Researcher ID
H-9343-2012

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  • Publication
    Dynamic mechanical analysis of graphene nanoplatelets/glass reinforced epoxy composite
    ( 2021-10-25)
    Ahmad M.A.A.
    ;
    Mohd Ridzuan Mohd Jamir
    ;
    Mohd Shukry Abdul Majid
    ;
    Cheng Ee Meng
    ;
    Sulaiman M.H.
    This paper presents a study on dynamic mechanical analysis (DMA) of graphene nanoplatelets (GNPs)/glass reinforced epoxy composite. The composite was fabricated by a hand lay-up technique followed by vacuum bagging technique. GNPs weight fraction was 0.5 and 1.5 wt.% for a fixed glass fibre fraction. The test was carried out in terms of storage modulus (E’), loss modulus (E”), and tan δ. The result indicates that 1.5 wt.% GNPs/glass reinforced epoxy composite obtain the maximum value of the dynamic mechanical properties due to the incorporation of GNPs nanofiller. The improved dynamic mechanical properties were related to better interfacial interaction of the nanofiller with the epoxy matrix. The glass transition temperature (Tg) value for 0.5 and 1.5 wt.% GNPs/glass were 62.84 and 66.01 °C, respectively.
  • Publication
    The effect of stacking sequence on fatigue behaviour of hybrid pineapple leaf fibre/carbon-fibre-reinforced epoxy composites
    ( 2021-11-01)
    Hashim M.K.R.
    ;
    Mohd Shukry Abdul Majid
    ;
    Mohd Ridzuan Mohd Jamir
    ;
    Kasim F.H.
    ;
    Sultan M.T.H.
    ;
    Shah A.U.M.
    ;
    Ahmad K.A.
    ;
    Basri A.A.
    This study examined the fatigue behaviour of pineapple leaf fibre/carbon hybrid laminate composites under various stacking sequences. The vacuum infusion technique was used to fabricate the symmetric quasi-isotropic oriented laminates, in which the stacking was varied. The laminate was tested under static and fatigue tensile load according to ASTM D3039-76 and ASTM D3479-96, respectively. Maximum tensile strength and modulus of 119.34 MPa and 6.86 GPa, respec-tively, were recorded for the laminate with external PALF ply and internal carbon ply oriented at [± 45◦ 2, 0◦ /90◦ 2]s (PCCP_45090). The fatigue tests showed that PCCP_45090 and CPPC_09045 (with internal PALF ply and external carbon ply oriented at [0◦ /90◦ 2, ± 45◦ 2]s) exhibited a higher useful life, especially at the high-stress level of the ultimate tensile strength. The normalised stress against the number of cycles showed that the stacking sequences of different ply orientations affected the fatigue behaviour more than the stacking sequences of the material. The laminate stacking sequence significantly affected the hysteresis energy and stiffness evolution. The scanning electron microscopy images showed that the fatigue failure modes included fibre pull-out, fibre breakage, matrix cracking, debonding, and delamination. The study concluded that PCCP_45090 exhibited an outstanding fatigue performance.
  • Publication
    Microwave dielectric analysis on porous hydroxyapatite/starch composites with various ratio of hydroxyapatite to starch
    ( 2020-07-09)
    You B.C.
    ;
    Cheng Ee Meng
    ;
    Shahriman Abu Bakar
    ;
    Nashrul Fazli Mohd Nasir
    ;
    Eng Swee Kheng
    ;
    Mohd Shukry Abdul Majid
    ;
    Mohd Ridzuan Mohd Jamir
    ;
    Khor Shing Fhan
    This study aims to investigate the dielectric response of the porous hydroxyapatite/starch composites by varying the starch proportion in determining the feasibility of the microwave sample characterization technique in bone tissue engineering. The porous hydroxyapatite/starch composites were fabricated by using natural starch (gelatinization and retrogradation) through the solvent casting and particulate leaching technique. The dielectric constant (ϵ′) and loss factor (ϵ″) of the complex permittivity of the porous hydroxyapatite/starch composites were measured in the Ku band frequency of 12.4-18.0 GHz. ϵ′ and ϵ″ of the porous composites increase with frequency. The highly porous composite that due to higher starch proportion exhibit higher ϵ′ and ϵ″, resulting in the significant dielectric responses.
  • Publication
    Lumped-element circuit modeling for composite scaffold with nano-hydroxyapatite and wangi rice starch
    ( 2023)
    Xiao Jian Tan
    ;
    Cheng Ee Meng
    ;
    Nashrul Fazli Mohd Nasir
    ;
    Mohd Shukry Abdul Majid
    ;
    Mohd Ridzuan Mohd Jamir
    ;
    Khor Shing Fhan
    ;
    Kim Yee Lee
    ;
    Kok Yeow You
    ;
    Che Wan Sharifah Robiah Mohamad
    Mechanistic studies of the interaction of electromagnetic (EM) fields with biomaterials has motivated a growing need for accurate models to describe the EM behavior of biomaterials exposed to these fields. In this paper, biodegradable bone scaffolds were fabricated using Wangi rice starch and nano-hydroxyapatite (nHA). The effects of porosity and composition on the fabricated scaffold were discussed via electrical impedance spectroscopy analysis. The fabricated scaffold was subjected to an electromagnetic field within the X-band and Ku-band (microwave spectrum) during impedance/dielectric measurement. The impedance spectra were analyzed with lumped-element models. The impedance spectra of the scaffold can be embodied in equivalent circuit models composed of passive components of the circuit, i.e., resistors, inductors and capacitors. It represents the morphological, structural and chemical characteristics of the bone scaffold. The developed models describe the impedance characteristics of plant tissue. In this study, it was found that the ε′ and ε″ of scaffold composites exhibited up and down trends over frequencies for both X-band and Ku-band. The circuit models presented the lowest mean percentage errors of Z′ and Z″, i.e., 3.60% and 13.80%, respectively.
  • Publication
    Evaluation of kenaf/glass fibre reinforced composites for bolted single lap joints under tension loading
    ( 2021-05-03)
    Mariam M.
    ;
    Zainab A.W.S.
    ;
    Afendi M.
    ;
    Mohd Shukry Abdul Majid
    ;
    Mohd Ridzuan Mohd Jamir
    Experimental studies have been presented in this paper on dissimilar material metal/fibre laminates to investigate the fatigue response under tension-tension loading. The testing was evaluated on single lap joints (SLJs) with different joint technique; fastener bolted, adhesive bonded and hybrid (combination of bolted and bonded) joint with dimension of 160 mm length, 40 mm width and 3±0.5 mm thickness. The dynamic testing was subjected into constant frequency and stress ratio of 5 Hz and 0.1, respectively. The range of applied load level were defined in between 30 % to 90%. Theoretically, significant improvements in fatigue strength can be obtained by adopting long overlap length which used in the study, 64 mm. From the experimental study, the hybrid joint of dissimilar material reached highest load cycles followed by adhesive bonded and bolted joint.
  • Publication
    Dielectric and Colorimetric Analysis on Thermal Degradation of Cooking Oil
    ( 2021-01-01)
    Cheng Ee Meng
    ;
    Zakaria A.
    ;
    Bakar S.A.
    ;
    Kheng E.S.
    ;
    Ahmad Nasrul Norali
    ;
    Nashrul Fazli Mohd Nasir
    ;
    Fhan K.S.
    ;
    Mohd Shukry Abdul Majid
    ;
    Yee L.K.
    ;
    Mohd Ridzuan Mohd Jamir
    In this work, dielectric and colorimetric properties of cooking oil is investi-gated for quality of cooking oil. An interdigitated electrode sensor (IDE), RGB colour detector and LCR (inductance–capacitance–resistance) meter were used to study colorimetric properties. The measured data was analyzed using principal component analysis, differential evolution feature extraction and major voting fusion. In dielectric measurement, there are different re-markable signal pattern which indicates the resistance change for used and fresh cooking oil. In addition, ten frequencies which can provide distinctive pattern were selected using differential evolution feature extraction. Nine types of cooking oil are then classified into used and fresh oil class. Major voting fusion exhibit 83% accuracy in classifying the oil. In the meantime, it can distinguish the used and fresh vegetable oils with approximately 100% accuracy. On the other hand, the results of colorimetric measurement indi-cate that this method can determine quality of frying oil accurately based on its type of oil, oil freshness, and duration of oil to fry.
  • Publication
    Biodegradation and swelling behaviour of cellulose-based plastic incorporation of pennisetum purpureum, chitosan and gelatine
    ( 2023-01-01)
    Rohadi T.N.T.
    ;
    Mohd Ridzuan Mohd Jamir
    ;
    Mohd Shukry Abdul Majid
    ;
    Normahira Mamat @ Mohamad Nor
    ;
    Hussain H.S.
    ;
    Xuan Y.Y.
    This paper reports on the biodegradation and swelling behaviour of cellulose-based plastic incorporation of Pennisetum purpureum (PS), chitosan and gelatine. Cellulose-based plastic (CP) was obtained from chitosan and gelatin; and from the cortex (CPS), pith (PPS), and whole (WPS) of Pennisetum purpureum (PS). The films were prepared by solution casting with untreated, 4, 8, 12, 16, and 20% alkali-treated cellulose of CPS, PPS, and WPS. The ASTM D5988-method was used to conduct the CP biodegradation tests. The swelling behaviour test was performed to measure the swelling percentage for each CP samples in aqueous solution with different pH values. The results reveal that the biodegradation of untreated CPS (60.30%), untreated WPS (49.74%), and untreated PPS (CP) showed the biggest relative weight reduction. CP added with the 8, and 16% alkali-treated cellulose of CPS, and PPS continues swelling in the solution of pH 7 throughout 24 hours of analysis. Increasing the cellulose loading accelerated the biodegradation rate of the bioplastic films. The results also suggest that the CP with the incorporated cortex (CPS) of Pennisetum purpureum (PS), is the most water-resistant in neutral followed by acid and alkali.
  • Publication
    Effect of varying core density and material on the quasi-static behaviors of sandwich structure with 3D-printed hexagonal honeycomb core
    ( 2024-01-01)
    Ainin F.N.
    ;
    Mohd Azaman Md Deros
    ;
    Mohd Shukry Abdul Majid
    ;
    Mohd Ridzuan Mohd Jamir
    Additive manufacturing (AM) involves the development of complex, lightweight sandwich structures for the automotive and aerospace industries. These structures are essential for load bearing and impact resistance. Nevertheless, there is a significant obstacle of failure under compressive loading, e.g. through brittle fractures and crushing. To address this issue, this study evaluates the compressive properties, energy absorption and failure damage in quasi-static tests (flatwise, in-plane, and flexural) of sandwich composites with 3D-printed hexagonal honeycomb cores of different unit cells (6, 8 and 10 mm) and materials (polylactic acid (PLA), PLA-Carbon and PLA-Wood). The results show that increasing the core density enhances compressive strength, modulus, and energy absorption. An 8 mm unit cell absorbs energy optimally for lightweight structures. In PLA flatwise testing, the 8 mm unit cell absorbed 419.49 J more energy than the 10 mm unit cell. Additionally, PLA-Wood has better mechanical performance than PLA-Carbon due to the better filler with the PLA- matrix. In flatwise testing with an 8 mm unit, PLA-Wood absorbs 214.01 J, while PLA-Carbon absorbs 122.49 J. The failure modes vary depending on tests performed. The study highlights the potential of 3D-printed honeycomb core structures for load-bearing applications in various industries, including aerospace and automotive. Highlights: Quasi-static loading behavior of 3D-printed hexagonal honeycomb cores. Increased core density improves compressive stress, modulus, and absorbed energy. An optimal unit cell size for lightweight 3D printed core structures is 8 mm. PLA-Wood performs better in energy absorption due to filler compatibility. The failure modes are related to the type of quasi-static loads applied.
  • Publication
    Electrical conductivity of graphene-glass and carbon-glass epoxy composites
    ( 2024-04-22)
    Ahmad M.A.A.
    ;
    Mohd Ridzuan Mohd Jamir
    ;
    Mohd Shukry Abdul Majid
    ;
    Ismail M.S.
    ;
    Cheng Ee Meng
    In this paper, an experimental investigation is conducted to examine the electrical conductivity of glass epoxy composites containing graphene and carbon nanofillers. The hand lay-up technique was used to fabricate the GN-glass, MWCN-glass, and GN-MWCN-glass hybrid epoxy composites. The nanofiller weight fraction at 1.5 and 3 wt. % was analysed. The electrical conductivity test was carried out using two-probe methods to evaluate the GN and MWCN nanofiller's contribution to forming conductive networks within the epoxy matrix and glass fibre. The result indicates a higher electrical conductivity value of GN-MWCN-glass hybrid epoxy composites due to hybrid nanofillers incorporation. Field emission scanning electron microscope analyses the nanofiller's dispersion and random distribution in the composites. The good conductivity was related to the better bond formation of the nanofillers with the epoxy matrix. The electrical conductivity results obtained from this study will serve as a basis for investigating the correlation between electrical resistance and strain characteristics in the self-sensing monitoring composite for future research.