The Experts below are selected from a list of 1016721 Experts worldwide ranked by ideXlab platform
Azizah Endut - One of the best experts on this subject based on the ideXlab platform.
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the formation and characterisation of an asymmetric nanofiltration membrane for ammonia nitrogen removal effect of shear rate
Bioresource Technology, 2010Co-Authors: Syazana N A Halim, Ahmad Jusoh, Azizah EndutAbstract:Abstract The focus of this research is to study the potential of nanofiltration membrane technology in removing ammonia–nitrogen from the aquaculture system. One of the major fabrication parameters that directly affect the separation performance is shear rate or casting rate during membrane fabrication. In this study, asymmetric polyethersulfone (PES) nanofiltration membranes were prepared at five different shear rates within the range of 67–400 s−1. Membrane productivity and separation performance were assessed via pure water, salt and ammonia–nitrogen permeation experiments, and their structural properties were determined by employing the combination of the irreversible thermodynamic (IT) model, solution diffusion model, steric hindrance pore (SHP) model and Teorell–Meyers (TMS) model. The study reveals that the alteration of shear rate enormously affects the membrane morphology and structural parameters, hence subsequently significantly influencing the membrane performance. It was found that, membrane produced at the shear rate 200 s−1 or equivalent to 10 s of casting speed during membrane fabrications managed to remove about 68% of ammonia–nitrogen, in which its separation performance is the most favourable by means of highest flux and rejection ability towards unwanted solutes. Besides, from the research findings, nano-membrane technology is a potential candidate for the treatment of aquaculture wastewater.
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the formation and characterisation of an asymmetric nanofiltration membrane for ammonia nitrogen removal effect of shear rate
Bioresource Technology, 2010Co-Authors: Syazana N A Halim, Ahmad Jusoh, Azizah EndutAbstract:Abstract The focus of this research is to study the potential of nanofiltration membrane technology in removing ammonia–nitrogen from the aquaculture system. One of the major fabrication parameters that directly affect the separation performance is shear rate or casting rate during membrane fabrication. In this study, asymmetric polyethersulfone (PES) nanofiltration membranes were prepared at five different shear rates within the range of 67–400 s−1. Membrane productivity and separation performance were assessed via pure water, salt and ammonia–nitrogen permeation experiments, and their structural properties were determined by employing the combination of the irreversible thermodynamic (IT) model, solution diffusion model, steric hindrance pore (SHP) model and Teorell–Meyers (TMS) model. The study reveals that the alteration of shear rate enormously affects the membrane morphology and structural parameters, hence subsequently significantly influencing the membrane performance. It was found that, membrane produced at the shear rate 200 s−1 or equivalent to 10 s of casting speed during membrane fabrications managed to remove about 68% of ammonia–nitrogen, in which its separation performance is the most favourable by means of highest flux and rejection ability towards unwanted solutes. Besides, from the research findings, nano-membrane technology is a potential candidate for the treatment of aquaculture wastewater.
Syazana N A Halim - One of the best experts on this subject based on the ideXlab platform.
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the formation and characterisation of an asymmetric nanofiltration membrane for ammonia nitrogen removal effect of shear rate
Bioresource Technology, 2010Co-Authors: Syazana N A Halim, Ahmad Jusoh, Azizah EndutAbstract:Abstract The focus of this research is to study the potential of nanofiltration membrane technology in removing ammonia–nitrogen from the aquaculture system. One of the major fabrication parameters that directly affect the separation performance is shear rate or casting rate during membrane fabrication. In this study, asymmetric polyethersulfone (PES) nanofiltration membranes were prepared at five different shear rates within the range of 67–400 s−1. Membrane productivity and separation performance were assessed via pure water, salt and ammonia–nitrogen permeation experiments, and their structural properties were determined by employing the combination of the irreversible thermodynamic (IT) model, solution diffusion model, steric hindrance pore (SHP) model and Teorell–Meyers (TMS) model. The study reveals that the alteration of shear rate enormously affects the membrane morphology and structural parameters, hence subsequently significantly influencing the membrane performance. It was found that, membrane produced at the shear rate 200 s−1 or equivalent to 10 s of casting speed during membrane fabrications managed to remove about 68% of ammonia–nitrogen, in which its separation performance is the most favourable by means of highest flux and rejection ability towards unwanted solutes. Besides, from the research findings, nano-membrane technology is a potential candidate for the treatment of aquaculture wastewater.
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the formation and characterisation of an asymmetric nanofiltration membrane for ammonia nitrogen removal effect of shear rate
Bioresource Technology, 2010Co-Authors: Syazana N A Halim, Ahmad Jusoh, Azizah EndutAbstract:Abstract The focus of this research is to study the potential of nanofiltration membrane technology in removing ammonia–nitrogen from the aquaculture system. One of the major fabrication parameters that directly affect the separation performance is shear rate or casting rate during membrane fabrication. In this study, asymmetric polyethersulfone (PES) nanofiltration membranes were prepared at five different shear rates within the range of 67–400 s−1. Membrane productivity and separation performance were assessed via pure water, salt and ammonia–nitrogen permeation experiments, and their structural properties were determined by employing the combination of the irreversible thermodynamic (IT) model, solution diffusion model, steric hindrance pore (SHP) model and Teorell–Meyers (TMS) model. The study reveals that the alteration of shear rate enormously affects the membrane morphology and structural parameters, hence subsequently significantly influencing the membrane performance. It was found that, membrane produced at the shear rate 200 s−1 or equivalent to 10 s of casting speed during membrane fabrications managed to remove about 68% of ammonia–nitrogen, in which its separation performance is the most favourable by means of highest flux and rejection ability towards unwanted solutes. Besides, from the research findings, nano-membrane technology is a potential candidate for the treatment of aquaculture wastewater.
Gerhard Wilde - One of the best experts on this subject based on the ideXlab platform.
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Surface patterning using templates: Concept, properties and device applications
Chemical Society Reviews, 2011Co-Authors: Yong Lei, Shikuan Yang, Minghong Wu, Gerhard WildeAbstract:Surface nano-patterns on substrates are the fundamental structures of various nano-devices. Template-based surface nano-patterning techniques are highly efficient methods in realizing different surface nano-patterns. The time-saving and low-cost fabrication processes of the template-based surface patterning are highly desirable for industry in fabricating different kinds of nano-devices. This tutorial review summarizes the recent advancements in the field of template-based surface nano-patterning, especially focusing on three templates prepared using self-assembly processes: ultra-thin alumina membranes, monolayer polystyrene sphere arrays, and block copolymer patterns. The basic concepts, the general fabrication processes, the structure-related properties, and the device applications of these template-based surface nano-patterning techniques are introduced.
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highly ordered nanostructures with tunable size shape and properties a new way to surface nano patterning using ultra thin alumina masks
Progress in Materials Science, 2007Co-Authors: Yong Lei, Weiping Cai, Gerhard WildeAbstract:Abstract Large-scale arrays of nanostructures on substrates, such as semiconductor or metal nano-particle arrays, have attracted considerable interest due to their unique physical properties and many potential applications in areas such as electronics, optoelectronics, sensing, high-density storage, and ultra-thin display devices. In the last two decades, the search for a highly efficient and low-cost nano-patterning method in fabricating ordered surface nanostructures with tunable dimensions and properties, has involved interdisciplinary and cross-disciplinary research and development with emerging technologies such as lithographic methods, self-assembly processes, and scanning probe techniques. Here, we review a new surface nano-patterning approach in fabricating ordered nanostructures, in which ultra-thin anodic alumina membranes are used as fabrication masks. Using the method, large-scale arrays of highly ordered nanostructures in the range of square centimeters can be fabricated on any substrate in a massive parallel way. The resulting nanostructures are characterized by highly defined and controllable size, shape, composition, and spacing of the nanostructures. Tuning of the properties of the arrayed nanostructures can be obtained by controlled adjustment of the structural parameters of the arrayed nanostructures. Compared to conventional lithographic methods, the present nano-patterning approach offers attractive advantages, such as large pattern area, high throughput, low equipment costs, and high flexibility and control options for ordered nanostructures with tunable properties. This new non-lithographic nano-patterning approach will be shown to be a general method in fabricating a wide range of ordered surface nanostructures with tunable and unique physical and chemical properties that could be used in the fabrication of nano-devices with high performance and controllability.
Ahmad Jusoh - One of the best experts on this subject based on the ideXlab platform.
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the formation and characterisation of an asymmetric nanofiltration membrane for ammonia nitrogen removal effect of shear rate
Bioresource Technology, 2010Co-Authors: Syazana N A Halim, Ahmad Jusoh, Azizah EndutAbstract:Abstract The focus of this research is to study the potential of nanofiltration membrane technology in removing ammonia–nitrogen from the aquaculture system. One of the major fabrication parameters that directly affect the separation performance is shear rate or casting rate during membrane fabrication. In this study, asymmetric polyethersulfone (PES) nanofiltration membranes were prepared at five different shear rates within the range of 67–400 s−1. Membrane productivity and separation performance were assessed via pure water, salt and ammonia–nitrogen permeation experiments, and their structural properties were determined by employing the combination of the irreversible thermodynamic (IT) model, solution diffusion model, steric hindrance pore (SHP) model and Teorell–Meyers (TMS) model. The study reveals that the alteration of shear rate enormously affects the membrane morphology and structural parameters, hence subsequently significantly influencing the membrane performance. It was found that, membrane produced at the shear rate 200 s−1 or equivalent to 10 s of casting speed during membrane fabrications managed to remove about 68% of ammonia–nitrogen, in which its separation performance is the most favourable by means of highest flux and rejection ability towards unwanted solutes. Besides, from the research findings, nano-membrane technology is a potential candidate for the treatment of aquaculture wastewater.
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the formation and characterisation of an asymmetric nanofiltration membrane for ammonia nitrogen removal effect of shear rate
Bioresource Technology, 2010Co-Authors: Syazana N A Halim, Ahmad Jusoh, Azizah EndutAbstract:Abstract The focus of this research is to study the potential of nanofiltration membrane technology in removing ammonia–nitrogen from the aquaculture system. One of the major fabrication parameters that directly affect the separation performance is shear rate or casting rate during membrane fabrication. In this study, asymmetric polyethersulfone (PES) nanofiltration membranes were prepared at five different shear rates within the range of 67–400 s−1. Membrane productivity and separation performance were assessed via pure water, salt and ammonia–nitrogen permeation experiments, and their structural properties were determined by employing the combination of the irreversible thermodynamic (IT) model, solution diffusion model, steric hindrance pore (SHP) model and Teorell–Meyers (TMS) model. The study reveals that the alteration of shear rate enormously affects the membrane morphology and structural parameters, hence subsequently significantly influencing the membrane performance. It was found that, membrane produced at the shear rate 200 s−1 or equivalent to 10 s of casting speed during membrane fabrications managed to remove about 68% of ammonia–nitrogen, in which its separation performance is the most favourable by means of highest flux and rejection ability towards unwanted solutes. Besides, from the research findings, nano-membrane technology is a potential candidate for the treatment of aquaculture wastewater.
N. V. Murthy - One of the best experts on this subject based on the ideXlab platform.
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Silicon Carbide Reinforced Aluminium Metal Matrix Nano Composites-A Review
Materials Today: Proceedings, 2017Co-Authors: A. Prasad Reddy, R. Narasimha Rao, P. Vamsi Krishna, N. V. MurthyAbstract:Aluminium metal matrix nano composites (Al-MMNCs) are a new generation of materials that have the potential of satisfying the recent demands of advanced engineering applications. They are widely used in automobile industries, aircrafts, structural applications and many other defence systems. Researchers have been observed that the addition of nano sized SiCp particles with aluminium alloy matrix yields superior mechanical and physical properties and interfacial characteristics of nano composites. The Scanning electron micrographs of the Al-MMNCs indicate that the nano SiCp reinforcing particles are uniformly distributed in the matrix alloy. This paper attempts to review the fabrication methods and mechanical properties of Al alloy/SiCp based metal matrix nano composites.
