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All Journal Jurnal Sains Indonesia Makara Journal of Technology
Badri, Khairiah Haji
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Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Social Sciences Other

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Physical and Mechanical Properties of Palm Kernel Oil-Based Polyester Polyurethane/Multi-Walled Carbon Nanotube Composites Mat Amin, Khairul Anuar; Zailani, Muhammad Alif; Zulkifli, Nurul Nabilah; Badri, Khairiah Haji
Makara Journal of Technology Vol. 21, No. 2
Publisher : UI Scholars Hub

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Abstract

In this study, polyurethane (PU) films from palm kernel oil-based polyester (PKO-p) incorporated multi-walled carbon nanotubes (MWNTs) are prepared via a evaporative casting method. Nanoparticle fluid dispersions containing 0.02%, 0.03%, and 0.05% wt. of MWNTs are added into PKO-p based resin and mixed by digital probe sonicator for 30 min followed by mixing with isocyanate to produce PU-MWNTs composite films. The mechanical properties, swelling, water vapour transmission rate (WVTR) and conductivity of the PU-MWNTs composite films are examined. Results show that the toughness (T) or flexibility, the tensile strength (TS), and Young’s modulus (YM) values of PU-MWNTs composite films increase with the increasing concentrations of MWNT. In contrast, the water vapour transmission rate (WVTR) and swelling test of PU-MWNTs composite films decrease with the increase of MWNT concentrations. For conductivity testing, the film with 0.05 wt.% MWNT (PU-5) has the highest conductivity value at 2.19 x 10-9 S cm-1. In summary, incorporation of MWNTs has improved the mechanical properties of the polyurethane composites films.
Review: A Modest Approach of Electrochemical Sensor to Determine Biogenic Amines in Food and Beverages Muhammad Abdurrahman Munir; Badri, Khairiah Haji; Heng, Lee Yook; Inayatullah, Ahlam; Badrul, Hamid Alkhair
Jurnal Sains Indonesia Vol 1 No 3 (2020): Volume 1, Nomor 3, 2020 (November)
Publisher : PUSAT SAINS INDONESIA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59897/jsi.v1i3.25

Abstract

Biogenic amines are chemical compounds that can be found in protein food. The analysis of biogenic amines in food samples is very important because the toxicity released by them is very adverse if consumed by human. Several methods have been applied and developed in order to detect biogenic amines such as liquid chromatography (LC) and gas chromatography (GC). Nevertheless, both of them are time consuming and using many chemical compounds. Thus, electrochemical sensors become the best solution in order to solve the issues from chromatography methods. Electrochemical sensors are very simple, easy to use and cheap. This paper reviews about various techniques of electrochemical sensor such as chemical sensors, biosensors and optical sensors that have been used for biogenic amines detection.
Co-Authors Badrul, Hamid Alkhair Inayatullah, Ahlam Lee Yook Heng, Lee Yook Mat Amin, Khairul Anuar Muhammad Abdurrahman Munir Zailani, Muhammad Alif Zulkifli, Nurul Nabilah