Khairuddin Md Isa
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Preferred name
Khairuddin Md Isa
Official Name
Md Isa, Khairuddin
Alternative Name
Isa, K. Md
Md Isa, Khairuddin
Md. Isa, Khairuddin
Isa, K. M.
Main Affiliation
Scopus Author ID
36188321600
Researcher ID
Y-7078-2019

Research Output

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  • Publication
    The application of continuous pneumatic jig for solid waste separation
    (Springer, 2025)
    M. A. Abd Aziz
    ;
    N. A. F. Bashari
    ;
    M. A. Hairunnaja
    ;
    M. A. Arifin
    ;
    Khairuddin Md Isa
    This study investigates the use of continuous pneumatic jigging as an efficient technique of solid waste separation, with a focus on the different materials of copper wire and rubber insulator. The research investigates the effect of several parameters on separation efficiency, such as air flow, pulse rate, vibrational force, and bed thickness. The 7-min experiment, which included the simultaneous use of jigging and vibration, gives light on the subtle relationships that govern particle movement. The results of the air flow and pulse rate investigation highlight the importance of concentration criteria and density discrepancies in obtaining appropriate separation. The usage of small particles refines the process for greater efficiency. A persuasive case is presented in the analysis of the vibrational impact for the efficacy of lower air flow rates coupled with higher vibrational force. This is consistent with the minimal fluidization velocity notion, emphasising the critical role of effective fluidization in particle separation performance. The analysis of bed thickness emphasises the significance of proportional modifications in air flow rate to maintain optimal separation efficiency. The research finishes with a synthesis of these findings, emphasising the attractive prospects of pneumatic jigging for solid waste separation, notably with copper wire and rubber insulator materials. The implications for waste processing scenarios, notably in the beneficiation or pre-treatment of waste electrical and electronic equipment prior to recycling, are discussed. This research lays a foundation for further exploration and application of pneumatic jigging in sustainable waste management practices.
  • Publication
    Innovative formulation and characterisation of grease made from waste engine oil
    (UPM Press, 2023)
    Muhammad Auni Hairunnaja
    ;
    Mohd Aizudin Abd Aziz
    ;
    Nurul Waheeda Abdu Rahman
    ;
    Mohd Azmir Arifin
    ;
    Khairuddin Md Isa
    ;
    Umi Fazara Md Ali
    Lubricating grease is usually produced from mineral oil, making the relationship between grease and mineral oil unavoidable. Formulation of grease from waste oil can reduce the dependency of the grease industry on mineral oil as well as help to reduce the waste generation of used oil. This study aims to produce fumed silica (FS) grease from waste engine oil (WEO) and analyse the properties of the formulated grease. The method started with treating WEO to remove any contaminants in the used oil. After that, the greases are produced using a weight percentage ratio before being examined for consistency, oil separation, oil bleeding, FTIR (Fourier transform infrared spectroscopy) analysis, and corrosiveness. In terms of uniformity, oil separation, and oil bleeding, WEO percentage content had a substantial impact on the findings. The FTIR demonstrated that synthetic greases had the same spectra when evaluated between 500 cm-1 and 4000 cm-1. The grease's corrosiveness is low, as determined by class 1 corrosiveness toward the copper strip. However, the grease properties differ when consistency, oil bleeding and oil separation test is done. Higher oil content in grease produced high oil bleeding and separation but low consistency. As a conclusion of the results, fumed silica grease with oil percentages of 83 and 82 have the most grease-like features, showing that the grease fits the traits' requirements. Based on the investigation's findings, it was established that WEO may be used as a base oil in grease formulation and that the grease's properties are satisfactory.
      2  12
  • Publication
    Breaking boundaries in biodegradable packaging : a comprehensive review on magnetic alignment of iron-cellulose in PLA
    (Universiti Malaysia Perlis, 2025)
    Siti Hajar Omar
    ;
    Mohd. Aizudin Abd. Aziz
    ;
    Saiful Azhar Saad
    ;
    Khairuddin Md Isa
    ;
    Nur Amira Fatihah Binti Bashari
    ;
    Muhammad Auni Hairunnaja
    This review paper explores the transformative potential of incorporating iron-coated cellulose into polylactic acid (PLA) composite films, presenting a comprehensive analysis of the advancements, implications, and challenges associated with this innovative approach. The introduction establishes the context, emphasizing the growing significance of sustainable packaging and the unique properties offered by biopolymers. The subsequent sections delve into the synthesis and fabrication methods, emphasizing the pivotal role of iron-coated cellulose in enhancing the mechanical, magnetic, and barrier properties of PLA nanocomposites. The review discusses in detail the magnetic alignment techniques employed, elucidating their impact on particle distribution and alignment within the PLA matrix. The exploration of magnetic field application reveals intricate relationships with curing times, emphasizing the dynamic interplay between magnetic alignment, curing processes, and particle distribution. The mechanical properties section further underscores the positive influence of magnetic alignment on tensile strength, stiffness, and dimensional stability, offering promising avenues for oriented structures in structural and functional materials. Expanding the scope to water barrier properties, the review investigates the effects of iron-coated cellulose on moisture absorption, revealing nuanced interactions that enhance the water barrier characteristics of the nanocomposites. Contact angle measurements provide insights into the surface properties, with the study uncovering how magnetic alignment contributes to improved hydrophobicity, thereby resisting water absorption and enhancing the effectiveness of these materials in packaging applications. The implications for sustainable packaging constitute a critical aspect of the review, shedding light on the environmental benefits and challenges associated with implementing magnetic alignment on a larger scale. The optimized material usage, renewable nature of iron-coated cellulose, and potential reduction in waste align with sustainability goals. However, challenges such as specialized equipment requirements and disposal considerations are also discussed, providing a balanced perspective. The paper concludes by summarizing the key advancements achieved through the incorporation of iron-coated cellulose into PLA composite films. It highlights the potential of these nanocomposites for future sustainable packaging, emphasizing their robust mechanical properties, magnetic functionalities, and enhanced water barrier characteristics. The conclusions underscore the collaborative effects of cellulose and iron coating, envisioning a future where sustainable packaging not only meets but surpasses industry standards. In essence, this review paper serves as a comprehensive guide, consolidating knowledge and insights to pave the way for future research and industry practices in the realm of sustainable and enhanced biopolymer packaging.
      3  1