PDF Publication Title:
Text from PDF Page: 011
CARBON DIOXIDE TECHNOLOGY PLATFORM 125 PEO segment and characterized by small angle X-ray scattering in CO2 (17). The perfluoroalkane chain was reported to have a number average molecular weight of 384 g/mol, whereas the PEO segment was reported to be 340 g/mol. The poly(tetrafluoroethylene)-block-PEO sample contained a range of molecular weights, and the corresponding scattering curve showed two distinct regions. The model proposed by the authors involved small premicellar surfactant aggregates consisting of fewer than 10 surfactant molecules and a second group of larger surfactant molecules containing 6 to 8 PEO units (17). The large aggregates could be classified as conventional reverse micelles. 2.2.3 Perfluoropolyether Chelating Agents KrytoxTM Fluorosurfactants, also known as perfluoropolyether (PFPE) carboxylic acids, have been converted to chelating agents and subsequently evaluated for solubility in CO2 (22). The chelat- ing agents were designed to possess a head group of either bis(picolyl amine) or dithiol and a tail of PFPE. The phase behavior of the chelating agents was shown to vary with molecular weight of the PFPE-tail component. As the molecular weight of the PFPE-tail increased, the total molecular weight of the compound increased, thereby decreasing its solubility in CO2. On the other hand, increasing the ratio of the PFPE-tail segment to the polar head group segment enhanced the solubility of the chelating agent. 2.3 CO2-Philic/Lipophilic Surfactants A semifluorinated diblock F(CF2)10(CH2)10H has been characterized by small angle X-ray scattering using 5–6 wt% surfactant concentrations in CO2 at 65◦C (17). The scattering data provided radius of gyration measurements that were compared to theoretical calculations for the individual molecules. For the conditions of this experiment, a model was developed that depicted no more than three to four unimers (individual copolymer chains) per aggregate for the diblock. Utilizing small-angle neutron scattering measurements in CO2 at 65◦C, a di- block of polystyrene and poly(FOA), polystyrene-block-PFOA, provided quite different results (16). Relying on calibrated small-angle neutron scattering curves, a model was developed that depicted the block copolymers as a spherical core-shell structure. By systematically increasing the PFOA block length, the radius of the total particle increased with a simultaneous decrease in the swelling of the corona. The solvent strength of CO2 is easily tuned so that by increasing the density of CO2 the aggregation number was observed to decrease, creating more dynamic micelles. It was proposed that a critical micelle density exists analogous to a critical micelle concentration to describe the phenomenon of unimer-to-aggregate transitions for amphiphilic materials in CO2. 2.4 Reversible Self-Assembly The phenomena of a critical micelle concentration suggested by previous scatter- ing measurements of block copolymers (16) was confirmed in a study of polyvinylPDF Image | OPPORTUNITIES FOR POLLUTION PREVENTION
PDF Search Title:
OPPORTUNITIES FOR POLLUTION PREVENTIONOriginal File Name Searched:
Ann._Review_Ener.Environ.pdfDIY PDF Search: Google It | Yahoo | Bing
NFT (Non Fungible Token): Buy our tech, design, development or system NFT and become part of our tech NFT network... More Info
IT XR Project Redstone NFT Available for Sale: NFT for high tech turbine design with one part 3D printed counter-rotating energy turbine. Be part of the future with this NFT. Can be bought and sold but only one design NFT exists. Royalties go to the developer (Infinity) to keep enhancing design and applications... More Info
Infinity Turbine IT XR Project Redstone Design: NFT for sale... NFT for high tech turbine design with one part 3D printed counter-rotating energy turbine. Includes all rights to this turbine design, including license for Fluid Handling Block I and II for the turbine assembly and housing. The NFT includes the blueprints (cad/cam), revenue streams, and all future development of the IT XR Project Redstone... More Info
Infinity Turbine ROT Radial Outflow Turbine 24 Design and Worldwide Rights: NFT for sale... NFT for the ROT 24 energy turbine. Be part of the future with this NFT. This design can be bought and sold but only one design NFT exists. You may manufacture the unit, or get the revenues from its sale from Infinity Turbine. Royalties go to the developer (Infinity) to keep enhancing design and applications... More Info
Infinity Supercritical CO2 10 Liter Extractor Design and Worldwide Rights: The Infinity Supercritical 10L CO2 extractor is for botanical oil extraction, which is rich in terpenes and can produce shelf ready full spectrum oil. With over 5 years of development, this industry leader mature extractor machine has been sold since 2015 and is part of many profitable businesses. The process can also be used for electrowinning, e-waste recycling, and lithium battery recycling, gold mining electronic wastes, precious metals. CO2 can also be used in a reverse fuel cell with nafion to make a gas-to-liquids fuel, such as methanol, ethanol and butanol or ethylene. Supercritical CO2 has also been used for treating nafion to make it more effective catalyst. This NFT is for the purchase of worldwide rights which includes the design. More Info
NFT (Non Fungible Token): Buy our tech, design, development or system NFT and become part of our tech NFT network... More Info
Infinity Turbine Products: Special for this month, any plans are $10,000 for complete Cad/Cam blueprints. License is for one build. Try before you buy a production license. May pay by Bitcoin or other Crypto. Products Page... More Info
CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com (Standard Web Page)