摘要:
The invention relates to a composite or a composite membrane consisting of an ionomer and of an inorganic optionally functionalized phyllosilicate. The isomer can be: (a) a cation exchange polymer; (b) an anion exchange polymer; (c) a polymer containing both anion exchanger groupings as well as cation exchanger groupings on the polymer chain; or (d) a blend consisting of (a) and (b), whereby the mixture ratio can range from 100% (a) to 100% (b). The blend can be ionically and even covalently cross-linked. The inorganic constituents can be selected from the group consisting of phyllosilicates or tectosilicates.
摘要:
A non crosslinked, covalently crosslinked and/or ionically crosslinked polymer, having repeating units of the general formula (1) —K—R— (1) In which K is a bond, oxygen, sulfur, the radical R is a divalent radical of an aromatic or heteroaromatic compound.
摘要:
A non crosslinked, covalently crosslinked and/or ionically crosslinked polymer, having repeating units of the general formula (1) —K—R— (1) In which K is a bond, oxygen, sulfur, the radical R is a divalent radical of an aromatic or heteroaromatic compound.
摘要:
The Invention relates to a drawn polymer film, comprising (A) a polymer or polymer blend and at least (B) one additional component with an average particle diameter of between 0.1 and 15 μm, which by means of (C) one or several secondary treatment steps is processed to form a membrane after being drawn. The average particle diameter of component (B) ranges between 0.1 and 15 μm, preferably 0.5-8.0 μm, with the range between 1.0 and 7.0 μm being particularly preferred. The membranes are used for alkene-alkane separation, electrodialysis, the desalinisation of seawater, in fuel cell applications and other membrane applications.
摘要:
A method is disclosed for production of solutions of aminophosphonic acids and polymeric sulphonic acids in aprotic solvents. Membranes for membrane methodologies are produced from said solutions. Said membranes can also be doped with phosphoric acid.
摘要:
The invention relates to novel polymers or oligomers containing at least sulfonite groups (P-(SO2)nX, X=1−(n=1), 2−(n=2) or 3−(n=3) valent metal cation or H+ or ammonium ion NR4+ wherein R=alkyl, aryl, H), which are obtained by completely or partially reducing polymers or oligomers containing at least SO2Y-groups (Y=F, Cl, Br, I, OR, NR2 (R=alkyl and/or aryl and/or H), N-imidazolyl, N-pyrazolyl) by means of suitable reducing agents in a suspension or in a solution form. The invention also relates to polymers and polymer(blend) membranes which are obtained by further reacting the obtained sulfinated polymers, especially by alkylation of the sulfinate groups with mono- di- or oligo functional electrophiles. The invention further relates to methods for producing the sulfinated polymers and for further reacting the sulfinated polymers with electrophiles by S-alkylation.
摘要:
The invention relates to:—anion exchange blend membranes consisting the following blend components:—a halomethylated polymer (a polymer with —(CH2)x—CH2—Hal groups, Hal=F, Cl, Br, I; x=0-12), which is quaternised with a tertiary or a n-alkylated/n-arylated imidazole, an N-alkylated/N-arylated benzimidazole or an N-alkylated/N-arylated pyrazol to form an anion exchanger polymer. - an inert matrix polymer in which the anion exchange polymer is embedded and which is optionally covalently crosslinked with the halomethylated precursor of the anion exchanger polymer,—a polyethyleneglycol with epoxide or halomethyl terminal groups which are anchored by reacting with N—H-groups of the base matrix polymer using convalent cross-linking—optionally an acidic polymer which forms with the anion-exchanger polymer an ionic cross-linking (negative bound ions of the acidic polymer forming ionic cross-linking positions relative to the positive cations of the anion-exchanger polymer)—optionally a sulphonated polymer (polymer with sulphate groups —SO2Me, Me=any cation), which forms with the halomethyl groups of the halomethylated polymer convalent crosslinking bridges with sulfinate S-alkylation. The invention also relates to a method for producing said membranes, to the use of said membranes in electrochemical energy conversion processes (e.g. Redox-flow batteries and other flow batteries, PEM-electrolyses, membrane fuel cells), and in other membrane methods (e.g. electrodialysis, diffusion dialysis).
摘要:
The invention relates to a membrane for proton conduction, made of a proton-conducting polymer for use in redox flow batteries. The polymer is sulfonated poly(ether ketone ether ketone ketone) (PEKEKK). The membranes are efficient, mechanically stable, oxidation-resistant in VO2+ with sulfuric acid, and exhibit long-term stability in the unblended state. The membranes can be used for several hundred to a thousand hours in vanadium redox flow batteries having black start capacity. Formula I, PEKEKK with a sulfonic acid group and an IEC of 1.73 meq/g.
摘要:
Ionomers and ionomer membranes, consisting of a non-fluorinated or partly fluorinated non-, partly or fully-aromatic main chain and a non- or partly-fluorinated side chain with ionic groups or their non-ionic precursors, have a positive impact on the proton conductivity of the ionomers. Various processes produce these polymeric proton conductors.
摘要:
A non crosslinked, covalently crosslinked and/or conically crosslinked polymer, having repeating units of the general formula (1) —K—R— (1) In which K is a bond, oxygen, sulfur, the radical R is a divalent radical of an aromatic or heteroaromatic compound.