Sustained lowefficiency dialysis for critically ill. Membrane preparation asymmetric psf membranes were prepared using. Commercial ro technology the semipermeable membrane for reverse osmosis applications consists of a thin film of polymeric material several thousand angstroms thick cast on a fabric support. This specification provides requirements and associated test methods for this thermoplastic when it is intended. Our team has successfully helped customers replace pei and polysulfone family polymers with both semicrystalline and amorphous high heat polymers alternatives. Commonly used dialyzer specifications and substitution. Polysulfone early market development activities springerlink. Rtp 900 polysulfone psu product data sheet rtp company. Both conferences were held at union carbides bound brook facility. Psu polysulfone tubes have excellent strength and rigidity, high impact resistance and is rated ul v0. Ignition control use suitable flameproof equipment or nonsparking tools in areas handling combustible powders.
A clinical update on dialyzer membranes stateoftheart. Utilized a custommanufactured polysulfone device with four 6mm diameter x 3mm deep indentations in agarose within in each well of standard 6well culture. Excellent for electrical and electronic, medical instruments and trays. Oxidants such as sodium hypochlorite, chlorine dioxide, hydrogen peroxide, and chloramines, which are effective in reducing membrane biofouling, are frequently used in feed water pretreatment and membrane cleaning processes. In neonates, we have had excellent experience with the spiraflo hft02 bellco, mirandola, italy and the fxpaed fresenius medical care, bad. The flat sheet ro membrane is composed of three layers. Quadrant epp psu, polysulfone, unfilled, extruded material notes. In this paper, the optimization of spinning parameters in preparing hydrophobic polysulfone psf hollow fiber support membrane is described. Convert and create pdf from various types of files like word doc, excel xls, powerpoint ppt. Effective bonding and grounding of powder handling units prevents the accumulation of. Click create pdf xps document, then click create pdf xps. Chatoth division of nephrology, department of internal medicine, university of arkansas for medical sciences, little rock, arkansas. A novel method of surface modification to polysulfone ultrafiltration membrane37 rejection wilbert 1998. For example, the reaction of the disodium salt of bisphenol a with dichlorodiphenyl sulfone yields bisphenol a polysulfone psu.
Polysulfone is a tough, rigid, high strength transparent thermoplastic which maintains its properties over a wide temperature range from 150 degrees f to above 300 degrees f. Fabrizio parodi, in comprehensive polymer science and supplements, 1989. A novel method of surface modification to polysulfone. These properties remain constant over a relatively broad temperature range 150. Rtp 900 p1720 polysulfone psu product data sheet rtp. Polysulfone is a hightemperature thermoplastic created for extended service beyond 300 degrees f. While machining polysulfone provides components for many different industries and applications, it does have its niche. All information recommendations and suggestions appearing herein concerning this product are based upon data obtained from the manufacturer andor recognized technical sources. Tecason s, unifone, ensifone, thermalux, udel, ultrason and others. The polysulfone sensor body cracked radially, adjacent to a moldedin steel insert. These polymers are known for their toughness and stability at high temperatures. A triple orificespinneret was utilized to create an open outward surface. Polysulfone, any of a class of resinous organic chemical compounds belonging to the family of polymers in which the main structural chain most commonly consists of benzene rings linked together by sulfonyl.
Typical applications for machining plastics include semiconductor processing components, heavy equipment wear parts, and food processing components. View and download powerpoint presentations on polysulfone ppt. Failure analysis of a polysulfone flow sensor body a. It is rigid, tough, and dimensionally stable over a wide temperature range.
It complies with the national sanitation foundations. The initial introduction was performed via two press conferences, capping several years of research and product development activities. Dialyzers in the 21 century the basics bc renal agency. An overview of the plastic material selection process for medical devices february 20. An overview of the plastic material selection process for. Designed for use in fda recognized devices, it also passed all test of the u. Polysulfone describes a family of thermoplastic polymers. When you save presentation as a pdf file it freezes the formatting and layout. Polyethersulfone is one of the hightemperature engineering thermoplastics in the polysulfone family. Polysulfones are a family of high performance thermoplastics.
Udel polysulfone, formerly known as bakelite polysulfone, was introduced via a flurry of promotional activities. Rtp 900 p1720 polysulfone psu product data sheet rtp company. Failure analysis of a polysulfone flow sensor body a case study jeffrey a. Polysulfone is resistant to degradation from hot water and steam and it is often used in medical and food preparation applications where repeated sterilization is required. According to the chemical definition, the term polysulfone comprises simply a group of polymers containing a sulfone group and alkyl or aryl groups. The primary structure of polysulfone has been previously investigated 55 5657 and is listed in table 4.
Sigmaaldrich offers a number of polysulfone products. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Polysulfone ps is useful as a membrane separation engineering material due to its excellent properties such as high tensile strength, good chemical stability, durability when heated, pressure resistance, and so on guo et al. Find powerpoint presentations and slides using the power of, find free presentations research about polysulfone ppt. People can view the slides even if they dont have powerpoint, but they cant make changes to it. The most important consideration in machining is to limit the amount of heat buildup, as the very act of machining generates friction, and thus, heat. It is the users responsibility to determine the safety, toxicity and suitability. Polysulfone 185 365 360 680 effect of morphology as cryyystallinity increases so does. Utilized a custommanufactured polysulfone device with four 6mm diameter x 3mm ppt.
Technically used polysulfones contain an aryl so 2 aryl subunit. Standard specification for polysulfone resin for medical. Trypsin mw 28 000 dalton purchased from sigma aldrich has been used for the evaluation of membrane performance. The surface of the dialyzer membrane should approximately match the body surface area of the patient. Supported by key features of high performance membrane dialyzers influence of design and chemical composition on membrane performance influence of membrane characteristics on clinical status. Physical properties metric english comments specific gravity 1. Polysulfone is an amorphous high performance thermoplastic that offers excellent mechanical and electrical properties, as well as chemical resistance to acidic and salt solutions.
Due to the high cost of raw materials and processing. Polysulfone properties remain relatively consistent over a broad range of temperatures, from 150f to 300f, and this material is suitable for applications where autoclavability is required. With the addition of glass fibers to the polysulfone, the result is an increase in tensile, flexural, and compressive strengths and also an increase in modulus values. The electronic, automotive, communications, food processing, plumbing, appliance manufacturing, and water purification industries plus the medical and chemical fields all use polysulfone in.
Psu polysulfone is a high temperature, amber colored, semitransparent plastic material with good mechanical properties. Polysulfone psu amorphous nylon polycarbonate pc acrylonitrile butadiene styrene abs styrene acrylonitrile san polystyrene ps high impact polystyrene hips acrylic pmma polyetheretherketone peek polyphenylene sulfide pps polyphthalamide ppa polyamide panylons polyethylene terephthalate pet polybutylene terephthalate pbt. In the publish as pdf or xps dialog box, choose a location to save the file to. Polysulfone is a popular material for tight tolerance and high heat.
One of the most common methods is nucleophilic substitution of an aromatic chloro or fluorosulfone by a phenoxide ion. Polysulfone is resistant to degradation from hot water and steam and it is often used in medical and food preparation. An engineers guide to specify the right thermoplastic. During the last 15 years, aromatic polysulfones have achieved a remarkable position among other thermoplastic polymers by virtue of their excellent properties, such as thermal stability, high distortiontemperature, chemical inertness, electrical performance and flame retardancy. Nf membranes are made from cellulose acetate blends or polyamide composites like the ro membranes, or they could be modified forms of uf membranes such as sulfonated polysulfone10. Preparation and characteristics of polysulfone dialysis composite membranes modified with nanocrystalline cellulose shuai li, yuan gao, haolong bai, liping zhang, ping qu, and lu bai composite membranes for dialysis were prepared by a loebsourirajan ls phase inversion process. Polysulfone polysulfone psu rods, sheets order online. Membranes can also be prepared from inorganic materials such as ceramics or metals3.
Polysulfone psu is an amorphous high performance polymer characterized by excellent thermal properties, good resistance to inorganic acids and bases, and outstanding hydrolytic stability against hot water and steam sterilization. The occasional hydrophilic character of its membrane surface is provided by the oxygen aryloalkyl and sulfur dioxide arylso 2 alkyl moieties that are able to form hydrogen bonds. Unfilled, extruded astm product data sheet manufacturer. Data provided by quadrant engineering plastic products physical properties metric english comments specific gravity 1. Pdf converter is a online webbased document to pdf converter software. Polysulfone is a thermoplastic that is widely used in high temperature applications. Polysulfone is a semihydrophobic material, containing sequential aromatic and aliphatic units that repulse water and hydrophilic compounds. The guide below offers common alternatives to pei within our portfolio. The commercial grade membrane must have high water permeability and a high degree of semipermeability. Amorphous thermoplastics tensile strength pull apart psi ultem 15,200 polysulfone 10,200 radel r 10,100 acrylic 10,000 noryl 9,600 polycarbonate 9,500 petg 7,700 pvc 7,500 kydex. Three membrane solutions with different polymer concentration of polysulfone 15% psf 15, 17% psf 17 and 19% psf 19 were used to prepare asymmetric flat sheets membranes via a simple drywet phase inversion technique. Polysulfone dialyzers are preferred because of their superior biocompatibility and lower anticoagulation requirements.
Stateoftheart considerations for optimal care in hemodialysis. Pdf advances in polysulfonebased membranes for hemodialysis. Displaying polysulfone powerpoint presentations utilized a custommanufactured polysulfone device with four 6mm diameter x 3mm ppt presentation summary. Process economics program sri international menlo park, california 94025 abstract process economics program report no. Save powerpoint presentations as pdf files office support. These polymers are known for their toughness and stability at high temperature.
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