Browsing Noorhafiza Muhammad, Assoc. Prof. Ts. Dr. by Author "noorhafiza@unimap.edu.my"
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Characteristics of thermoplastic potato starch/bentonite nanocomposite film
Nurul Husna, Zakaria; Noorhafiza, Muhammad; Mohd Mustafa Al Bakri, Abdullah; Sandu, I. G.; Mei Wan, C. L. (IOP Publishing Ltd, 2018-06)The aim of this study is to investigate the effect of bentonite towards thermoplastic potato starch nanocomposite films on the mechanical, microstructure and physical properties. The nanocomposite films were prepared using ... -
Comparison of dry and wet fibre laser precision cutting for coronary stent manufacture
Noorhafiza, Muhammad; Whitehead, David; Boor, Alan; Li, Lin (Laser Institute of America, 2010)High precision laser micromachining is extensively used in medical device industry. In medical stent fabrication, the processed stents must exhibit mechanically robust structures and high surface quality. High cost of post ... -
Comparison of dry and wet fibre laser profile cutting of thin 316L stainless steel tubes for medical device applications
Noorhafiza, Muhammad; Whitehead, David; Boor, Alan; Li, Lin (Elsevier B.V., 2010-11-19)In medical coronary stent fabrication, high precision profile cutting with minimum post-processing is desirable. Existing methods of profiling thin tubular metallic materials are based mainly on the use of Nd:YAG lasers. ... -
Effect of mixing temperature on characteristics of thermoplastic potato starch film
Nurul Husna, Zakaria; Noorhafiza, Muhammad; Sandu, Andrei Victor; Mohd Mustafa Al Bakri, Abdullah (IOP Publishing Ltd, 2018-06)This study present the preparation of potato starch film with glycerol as a plasticizer through a solution casting technique. The effect of mixing temperature (80°C, 85°C, 90°C and 95°C) on the tensile and microstructure ... -
In Vitro bioactivity study of thermoplastic Starch/Bentonite/Hydroxyapatite composites for biomedical applications
Nurul Husna, Zakaria; Noorhafiza, Muhammad; Mohd Mustafa Al Bakri, Abdullah; S. N. F., M. Noor (IOP Publishing Ltd, 2020-02)Potato starch composites film incorporating hybrid bentonite and hydroxyapatite (HA) were investigated as novel biomaterial for potential biomedical applications. The selected potato starch/bentonite composites were prepared ... -
Laser cutting of coronary stents: Progress and development in laser based stent cutting technology
Noorhafiza, Muhammad; Mohd Mustafa Al Bakri, Abdullah; Mohd Shuhidan, Saleh; Li, Lin (Trans Tech Publications Ltd., 2015)Laser cutting is one of the key fabrication technologies applied to coronary stent manufacture. This paper reviews the recent progress in laser-based stent manufacturing, including different type of lasers used, laser ... -
Picosecond laser fabrication of nitinol for coronary stent applications
Noorhafiza, Muhammad; Whitehead, David; Viejo, F.,; Abuaisha, R.,; Boor, Alan; Oppenlaendar, W.,; Liu, Zhi; Li, Lin (Laser Institute of America, 2010)Nitinol (a shape memory nickel-titanium alloy) is one of the desirable materials for medical stents applications, due to its high corrosion resistance, self-expansion and biocompatibility. The stents are commonly fabricated ... -
Potential of cassava root as a raw material for bio composite development
Nurul Husna, Baharuddin; Mazlan, Mohamed; Mohd Mustafa Al Bakri, Abdullah; Noorhafiza, Muhammad; Rozyanty, Rahman; Mohd Nazri, Omar; Mohd Hazim, Mohamad Amini; Mohammad Khairul Azhar, Abdul Razab; Zairi Ismael, Rizman (Asian Research Publishing Network (ARPN), 2016-05)In recent years, a lot of researches have done by domestic and foreign scholars to enhance and improve the development of man-made board production that based on natural fiber and agricultural residues. Due to a worldwide ... -
Potential of starch nanocomposites for biomedical applications
Nurul Husna, Zakaria; Noorhafiza, Muhammad; Mohd Mustafa Al Bakri, Abdullah (IOP Publishing Ltd, 2017-06)In recent years, the development of biodegradable materials from renewable sources based on polymeric biomaterials have grown rapidly due to increase environmental concerns and the shortage of petroleum sources. In this ... -
Surface topographical modification of coronary stent: a review
Tan, C H; Noorhafiza, Muhammad; Mohd Mustafa Al Bakri, Abdullah (IOP Publishing Ltd, 2017-06)Driven by the urge of mediating the inflammatory response from coronary stent implant to improve patency rates of the current coronary stent, concern has been focusing on reducing the risk of in-stent restenosis and ... -
Understanding the behaviour of pulsed laser dry and wet micromachining processes by multi-phase smoothed particle hydrodynamics (SPH) modelling
Noorhafiza, Muhammad, Dr.; Rogers, Benedict, Dr.; Li, Lin (IOP Publishing, 2013-03)A smoothed particle hydrodynamics (SPH) numerical model is developed to simulate the three-phase laser micro-machining process for medical coronary stent manufacture. The open-source code SPHysics is used to model the ...