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Showing 1 to 20 of 72 for “"Polysulfone"”.
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An Investigation of Pore Collapse in Asymmetric Polysulfone Membranes
Porous polysulfone membranes prepared by phase inversion can be tailored to suit filtration requirements by the choice of solvent and coagulant. In the current research polysulfone membranes were prepared by inverting a solution in N-methyl pyrrolidinone (NMP) in isopropanol to form uniform sized …
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Study on the effect of zeolite rice husk particles on polysulfone membrane
… obtained from rice husk ash (RHA). The RHY/polysulfones (PSf) membranes incorporated with RHY particle at different loading were prepared through phase inversion technique. Physical characterization were carried out using thermogravimetric analysis (TGA), scanning electron microscope (SEM), …
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Development of in situ synthesis of silver polysulfone membrane for water separation
… development of in-situ synthesis of silver (Ag)/polysulfone (PSf) membrane was carried out for water separation purposes. The effect of different types of silver on membrane performance, the effect of silver precursor and the effect of in-situ synthesis of silver in PSf membrane has been …
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Polysulfone ultrafiltration membranes impregnated with silver nanoparticles show improved biofouling resistance and virus removal
… control. In this study, nAg incorporated into polysulfone ultrafiltration membranes (nAg-PSf) exhibited antimicrobial properties towards a variety of bacteria, including Escherichia coli K12 and Pseudomonas mendocina KR1, and enhanced the removal of MS2 bacteriophage. Nanosilver incorporation …
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The effect of flower-like tatania towards characteristics and performance of polysulfone mixed matrix membrane
For ages, the polymeric membrane such as PSf is widely used in liquid separation for various application as the polymer itself offer versatile and attractive properties. However, due to strong hydrophobic nature of PSf property that create serious fouling problem to most of the separation process, …
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Synthesis and Properties of Novel Triptycene-containing Segmented Polyurethanes and Semicrystalline Polysulfone-polyester Multiblock Copolymers
Segmented copolymers are important polymers with attractive properties and wide applications. In this dissertation, segmented polyurethanes containing triptycene units and multiblock copolymers containing poly(arylene ether sulfone) (PAES) and poly(1,4-cyclohexyldimethylene terephthalate) (PCT) …
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Polysulfone mixed matrix membranes with biosynthesis nanoparticles: enhancement of interface compatibility and antibacterial membrane seperation process
This study investigates the effect of biosynthesis silver nanoparticles (bio-AgNPs) structure towards PSf membranes performance. The addition of bio-AgNPs in the membrane formulation was aimed to improve antibacterial properties and interface compatibility of the polymer mixed matric membrane. In …
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Studies of blends containing liquid crystalline polymers with PET and related investigations of hydroquinone/biphenol polysulfone systems
The investigation of structure-property behavior of extruded cast films prepared from blends of thermotropic liquid crystalline copolyesters with polyethylene terephthalate (PET). Data were obtained which showed not only the temperature dependence of the moduli and stress-strain behavior but also …
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Enhancement of antifouling properties using rice husk silica particles in polysulfone membrane and optimization of its operating condition
… of rice husk silica (RHS) as additive in the polysulfone membrane to enhance antifouling properties in membrane separation process. The flat sheet PSf/RHS membrane was prepared via phase inversion technique. The characterization and performance test were conducted on PSf ultrafiltration …
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Application of the Vortex Fluid Device (VFD) in Polysulfone Synthesis and Ultra-filtration Membrane Fabrication for water treatment purposes
… with their filtration performances. Initially, Polysulfone (PSF) was prepared under high shear in the VFD operating in the confined mode, and its properties compared with that prepared using batch processing. Scanning electron microscopy (SEM) established that the VFD synthesised PSFs are …
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Characterization of polymeric membranes: sulfonated polysulfones
Sulfonated polysulfone has been shown to possess desirable physical properties for use as a reverse osmosis desalination membrane. In this work, an extensive of dense membranes made from sulfonated polysulfone having 0.2, 0.4, 0.5, 0.6, 0.8, and 1.0 degree of sulfonation is described. The degree of …
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Effect of surface treatment on the mechanical properties of the polysulfone-Al/Li bonded system including thin film studies of moisture intrusion and the viscoelastic response of the interphase region
An investigation of polysulfone-Al/Li alloy interaction involved single lap shear joints and wedge samples following an FPL etch, sulfuric acid anodization (SAA) and phosphoric acid anodization (PAA). The study of the Al/Li surfaces involved the determination of the elemental composition and …
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Siloxane modified engineering thermoplastics
… were examined. The first was that of polysulfone-polyarylester block copolymers where glassy-crystalline block copolymers were synthesized and characterized. The morphology of the block copolymers could be controlled by varying the chemical microstructure of the polyester segment. …
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Growth dynamics, charge density, and structure of polyamide thin-film composite membranes
… characterize the polyamide layer formed on the polysulfone support, without physical or chemical removal, so that it is close to its native form, which has been used in industrial reverse osmosis applications. Growth dynamics by diffuse reflectance spectroscopy was developed for the …
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Synthesis, properties, and modifications of engineering polymers
… of these materials were also examined. Polysulfones were characterized to be tough, ductile materials and it was found that polysulfone-poly(dimethylsiloxane) block copolymers blends with homopolysulfone serves to further increase their ductility as indicated by fracture toughness …
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Engineering properties of multiphase block copolymers
… In the bisphenol-A polycarbonate/bisphenol-A polysulfone system, for example, strictly one phase materials, with only one intermediate glass transition temperature, were obtained at block lengths of less than 10,000 g/mole. Two-phase copolymers resulted when blocks exceeding 20,000 g/mole were …
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Fabrication and characterization of nano-engineered membranes for oil-water separation
… work, a method for fabricating an asymmetric polysulfone membranes is presented. The polysulfone membrane has the feature of allowing much higher flow rates for a given applied pressure. The research is largely motivated by a need for low cost methods for separating o/w and w/o emulsions. The …
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Synthesis of poly(arylene ether sulfone)-polyimide segmented copolymers
… o-dichlorobenzene as the azeotroping agent. The polysulfone oligomers were reacted into the system via the diamine oligomer. The segmented copolymers demonstrated good solubility characteristics, high thermal stability, and high glass transition temperatures. Previously, polyimides containing …
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Interfacial strength development in thermoplastic resins and fiber-reinforced thermoplastic composites
… prepregs. All tests were performed using polysulfone P1700 thermoplastic resin and AS4/P1700 graphite-polysulfone prepreg. Two test methods were examined to measure autohesion in neat resin samples. These included an interfacial tension test based on the ASTM tensile adhesion test (ASTM …
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