Phosphonic acid-containing blends and phosphonic acid-containing polymers

a technology of phosphonic acid and blends, which is applied in the direction of cation exchanger materials, sustainable manufacturing/processing, and final product manufacturing, etc., can solve the problems of reducing proton conductivity, unable to use, and unable to meet the temperature range above 100°

Inactive Publication Date: 2017-06-15
HARING THOMAS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0019]prevention of bleeding out of the polymer blends, if blends of polymeres with low molecular 1-hydroxymethylene-1,1-bisphosphonic acids according to the invention are used in membrane applications.

Problems solved by technology

They can't be used at temperatures above 100° C., because they dry out and fort his reason their proton conductivity decreases several orders of magnitude.
Kerres, F. Schrönberger, unveröffentlichte Ergebnissephosphonic acids tend at temperatures around 120° C. to condensate. which renders their use in fuel cells in the temperature range above>100° C. so far impossible.< / ul

Method used

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  • Phosphonic acid-containing blends and phosphonic acid-containing polymers
  • Phosphonic acid-containing blends and phosphonic acid-containing polymers
  • Phosphonic acid-containing blends and phosphonic acid-containing polymers

Examples

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application examples

[0101]1. Preparation of an ionically cross-linked blend from a 1-hydraxymethylene-1,1-bisphosphonic acid containing a pyridine group and a sulfonated arylene main-chain polymer (universal procedure)

[0102]3 g of the sulfonated arylene main-chain polymer in the SO3Na form are dissolved in DMSO to a 10% solution. It is dissolved so much of the pyridine-containing 1-hydroxymethylene-1,1-bisphosphonic acid in the Na+ form in DMSO to a 10% solution, that there is 1 sulfonate group per 1 pyridine group. Thereafter the solutions are mixed together. The combined solution is cast onto a glass plate to a thin film with a doctor knife. Then the DMSO is removed via evaporation at temperatures between 50 and 150° C. and, if necessary, low pressure of 800-10 mbar. Then the polymer film is removed under water from the glass plate. The polymer film is posttreated as follows:[0103]1. In 1 to 50% base (alkali base such as NaOH, KOH, LiOH, etc., earth alkali such as Ba(OH)2,Ca(OH)2, aqueous ammonia or ...

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Abstract

A blend or blend membrane formed from a hydroxymethylene-oligo-phosphonic acid R-C(P03H2)x(OH)y and a polymer, in which the radical R is any organic radical, x and y are integers, the hydroxymethylene-oligo-phosphonic acid is a product of a reaction involving a carbonic acid, a carbonic acid halide or a carbonic acid anhydride, and the polymer includes a functional group selected from the group consisting of (i) suitable cation exchange groups or their non-ionic precursor and (ii) suitable basic groups.

Description

BACKGROUND OF THE INVENTION[0001]Commercially available ionomer membranes based on perfluorinated sulfonic acids can be used at temperatures below 100° C. in electrochemical cells, especially in fuel cells and show in this temperature range good H+-conductivities and high (electro)chemical stability. They can't be used at temperatures above 100° C., because they dry out and fort his reason their proton conductivity decreases several orders of magnitude. 1,2 However it makes sense to run a fuel cell at temperatures above 100° C. because the CO-tolerance of the fuel cell reaction in this temperature range is markedly greater due to a faster electrode kinetic as below 100° C.3. How ever as explained above is the use of sulfonated ionomer membranes at temperatures above 100° C. in fuel cells atmospheric pressure and with out humidifying of the membrane not possible. In the literature several approaches for alternative proton conductors in the temperature range of approximately 100 to 20...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H01M8/1034H01M8/1023B01J39/20H01M8/1039C08J5/22H01M8/1044H01M8/1025
CPCH01M8/1034H01M8/1044H01M8/1023H01M8/1025C08J2341/00C08J5/2287B01J39/20H01M2008/1095H01M8/1039C08G61/02C08G61/122H01M8/1011H01M8/1027H01M8/103H01M8/1032H01M8/1048H01M8/1072H01M2300/0082Y02E60/50Y02P70/50
Inventor HARING, THOMASKERRES, JOCHENSCHONBERGER, FRANKHEIN, MARTIN
Owner HARING THOMAS
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