摘要:
La présente invention concerne de nouveaux polymères contenant statistiquement plusieurs motifs sulfoniques ou sulfonates métalliques par unité de répétition, leurs procédés de préparation et leurs emplois comme antibactériens, fongicides, antiviraux et catalyseurs.
摘要:
Provided is a method of removing sodium from a collection of sodium-laden resin beads comprising the steps of (a) providing the collection of sodium-laden resin beads, wherein the resin beads comprise one or more vinyl polymers having quaternary ammonium groups; wherein cation exchange resin, if present in the collection of resin beads, are present in an amount of 0 to 0.5% by weight based on the weight of the collection of resin beads; wherein 90 mole % or more of the quaternary ammonium groups are each associated with a hydroxide anion; wherein sodium is present in an amount of more than 100 ppb by weight, based on the weight of the collection of sodium-laden resin beads, and (b)bringing the collection of sodium-laden resin beads into contact with aqueous ammonium hydroxide to form a mixture (b).
摘要:
L'invention concerne un matériau destiné à l'injection plastique et son procédé de fabrication, comportant de la matière thermoplastique, des billes de verre creuses et des fibres de carbone, caractérisé en ce qu'il consiste en un mélange de deux composés distincts, un premier composé sous forme de granulés obtenus par extrusion, de préférence par extrusion selon le procédé BUSS, et comprenant de la matière thermoplastique et des billes de verre creuses, et un second composé sous forme de granulés comprenant de la matière thermoplastique chargée en fibres telles que des fibres de carbone ou des fibres végétales.
摘要:
A self-supported ion exchange membrane is described. The membrane includes: a polymerized and crosslinked monomer, where the monomer includes: a least one ionic group, a polymerized group, and a silicate group; and a polymer chemically bonded to crosslinked monomer through the silicate group.
摘要:
Abstract A solid polymer electrolyte composition is made by hydrolyzing cellulose in a dissolution media to form a first mixture; then combining said first mixture with an antisolvent to form a precipitate; and then (in any order) separating said precipitate from excess antisolvent and excess dissolution media; optionally adjusting or neutralizing the pH of said precipitate; optionally washing said precipitate with water; combining said precipitate with an electrolyte salt and a hydrophilic polymer to form a wet polymer electrolyte composition; and then drying said wet polymer electrolyte composition to produce a solid polymer electrolyte composition. Solid polymer electrolyte compositions produced by the process, along with films formed therefrom and devices containing the same, are also described.
摘要:
"PROCESS OF CARBONS FUNCTIONALIZATION BY THE GROWTH OF POLYMERIC CHAINS WITH ION EXCHANGE PROPERTIES FOR POLYMER ELECTROLYTE FUEL CELLS APPLICATIONS", that is related to the electrocatalysts for polymer electrolyte fuel cell technology, related to a chemical activation form of the carbon source surface, like carbon black, performing the growth of polymeric chains with proton exchange properties, and afterward to perform the anchoring of the electrocatalysts nanoparticles like Pt, PtRu and others, or by just a chemical activation of the carbon source surface by chemical oxidant reaction using oxidant agents like chromate ions, dichromate, permanganate, nitrate, halogens, hydrogen peroxide, and others, preferably nitric acid or hydrogen peroxide or its mixtures, or any reagent or technique that are able to produce oxygenated groups in the carbon surface. The main effect of this invention is the improvement of the ion conductivity in the three interfaces, consequently decreasing the ohmic drop of the system.
摘要:
Methods of making macroporous cation exchange resins are described. The macroporous cation exchange resins are in the form of particles such as beads that contain a hydrophilic, crosslinked, (meth)acrylic-type polymeric material. The macroporous cation exchange resins are prepared using an inverse suspension polymerization process in the presence of a water soluble, organic, aliphatic porogen having at least three hydroxy groups.
摘要:
Improved systems and methods for removing the load of perchlorate and other oxyanions off of ion exchange resins through bioregeneration are disclosed. The improved systems and methods rely upon direct contact between the resin and a liquid product containing enrichment cultures of or pure strains of perchlorate-destroying microorganisms. Controlled temperatures also lead to improvements as do upflow conditions leading to bed expansion. These methods can be incorporated into methods for removing perchlorate from aqueous streams.