Poly Ethylene Oxide Membranes

W.H. Jo, H.J. Kim, Y.S. Kang, Separation of water—ethanol mixture through poly(acrylonitrile-co-acrylic acid)/poly(ethylene oxide) membranes by pervaporation, J. Appl. Polym. Sci. 51 (1994) 529— 535. 

An J, Zhang H, Zhang J, Zhao Y, Yuan X (2009) Preparation and antibacterial activity of electrospun chitosan/poly(ethylene oxide) membranes containing silver nanoparticles. Colloid Polym Sci 287 1425-1434... 

Chapman et al. [131] reported the synthesis of poly(ethylene oxide) (PEO) supported dendritic f-BOC-poly(a, c-L-lysines). These dendritic polymers termed as hydramphiphiles formed foams possessing good temporal stability in aqueous solution. Scrimin et al. [132] synthesized a three-directional polypeptide having uses in membrane permeability modulation. Decapeptide fragments were linked to TREN [tris(2-aminoethyl)amine] core. 

Gel polymer lithium-ion batteries replace the conventional liquid electrolytes with an advanced polymer electrolyte membrane. These cells can be packed in lightweight plastic packages as they do not have any free electrolytes and they can be fabricated in any desired shape and size. They are now increasingly becoming an alternative to liquid-electrolyte lithium-ion batteries, and several battery manufacturers. such as Sanyo. Sony, and Panasonic have started commercial production.Song et al. have recently reviewed the present state of gel-type polymer electrolyte technology for lithium-ion batteries. They focused on four plasticized systems, which have received particular attention from a practical viewpoint, i.e.. poly(ethylene oxide) (PEO). poly (acrylonitrile) (PAN). ° poly (methyl methacrylate) (PMMA). - and poly(vinylidene fluoride) (PVdF) based electrolytes. ... 

Asatekin A, Kang S, Elimelech M et al (2007) Anti-fouling ultrafiltration membranes containing polyacrylonitrile-graft-poly(ethylene oxide) comb copolymer additives. J Membr Sci 298 136-146... 

Scheme 4.1 Chemical structures of the principal membrane, a poly(ethylene glycol)diacrylate (PEGda). b poly(ethylene oxide) (PEO). c poly(propylene glycol)diacrylate (PPGda). d 2-aminoethylmethacrylate (AEMA) hydrochloride, e poly(ethylene glycol)urethane dimethacrylate (PEGudm) [53]...

Car A, Stropnik C, Yave W et al (2008) PEG modified poly(amide-b-ethylene oxide) membranes for C02 separation. J Membr Sci 307(l) 88-95... 

Fig. 30 a, b. Formation of intermacromolecular complexes through hydrogen bonds in heterogeneous systems1771. (a) Time dependence of the poly(methacrylic acid) (PMAA) membrane contraction by complexation with poly(ethylene oxide) (PEO) with different chain length. O Mrao = 600, 3 Mpeo = 1000, MPEO = 2000, MPEO = 7500, A Mreo = 83000. (b) Time dependence of the PMAA membrane contraction by complexation with various proton-accepting polymers. O Poly(N-vinyl-2-pyrrolidone) (PVPo) (M. = 10000) 3 PVPo (M = 360000), poly (methyl vinyl ether) (Mw = 64000) poly (vinyl alcohol) (Mw = 22000)... 

Fig. 32. Dependence of mechanochemical contraction, stress and water permeability of a complex membrane consisting of poly-(methacrylic add) (PMAA) and poly(ethylene oxide) (PEO) on the molecular weight of PEO483. (1) Relative permeability to water,...

Osada202 described the mechanochemical system of poly(methacrylic acid)-poly(ethylene oxide) by utilizing intermacromolecular complexation between the two component polymers (Fig. 51). The PMAA membrane is contracted by more than 90% of its original length when heated from 10 to 60 °C. When decreasing the temperature, the membrane almost completely recovers its original state. The work spent per a contraction is about 5 x 10 3 cal/g of membrane. 

A system with interesting properties is the poly(ethylene oxide)-Wock-poly[2-(diethylamino) ethyl methacrylalc -.sfa -[3-(trimclhoxysilyl)propyl methacrylate] (PEO-b-P(DEA-sfaf-TMSPMA)) block copolymer. This self-crosslinkable copolymer formed vesicles which demonstrated pH-tunable membrane permeability [223],... 

Gitsov et al 10) produced a nanoreactor fi om laccase and linear poly(ethylene oxide)-dendritic poly(benzyl ether) diblock copolymers. A notable feature of this system is the presence of hydrophobic dendritic pockets that increase the local concentration of water-insoluble organic compounds near the active site where they are oxidized. Li and Hsieh (77) employed a hydrogel fiber membrane, with a large surface area and improved organic solvent solubility in order to facilitate lipase reactions. He (72) grafted lipase onto silica particles, which permitted him to carry out synthesis of polyesters, polycarbonates, polyphosphates, and their copolymers at temperatures up to 150°C. 

Another way to template thin films of nano-sized cylinders perpendicular to the surface is to start with a preformed membrane of track-etched polycarbonate or nanoporous alumina. A fiuid dispersion of a filler material can be drawn into the pores. Anodized aluminum oxide was the template for construction of lithium ion nanobatteries having many parallel cells filled with the solid state electrolyte PEO-LiOTf (poly(ethylene oxide)-lithium trifluoromethanesulfonate) and the electrodes coated on the top and bottom surfaces of the film (41). 

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