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EP0244626A1 - Electrode et son application - Google Patents

Electrode et son application Download PDF

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Publication number
EP0244626A1
EP0244626A1 EP87104615A EP87104615A EP0244626A1 EP 0244626 A1 EP0244626 A1 EP 0244626A1 EP 87104615 A EP87104615 A EP 87104615A EP 87104615 A EP87104615 A EP 87104615A EP 0244626 A1 EP0244626 A1 EP 0244626A1
Authority
EP
European Patent Office
Prior art keywords
electrodes
electrode
drying
masonry
desalination
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP87104615A
Other languages
German (de)
English (en)
Other versions
EP0244626B1 (fr
Inventor
Bernard Dr Wessling
Christian Funder
Harald Dr. Volk
Olaf Siemers
Holger Merkle
Manfred Hilleberg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wessling Bernhard Dr
Original Assignee
Wessling Bernhard Dr
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wessling Bernhard Dr filed Critical Wessling Bernhard Dr
Priority to AT87104615T priority Critical patent/ATE47529T1/de
Publication of EP0244626A1 publication Critical patent/EP0244626A1/fr
Application granted granted Critical
Publication of EP0244626B1 publication Critical patent/EP0244626B1/fr
Expired legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/70Drying or keeping dry, e.g. by air vents
    • E04B1/7007Drying or keeping dry, e.g. by air vents by using electricity, e.g. electro-osmosis
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23FNON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F13/00Inhibiting corrosion of metals by anodic or cathodic protection
    • C23F13/02Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25BELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B11/00Electrodes; Manufacture thereof not otherwise provided for
    • C25B11/04Electrodes; Manufacture thereof not otherwise provided for characterised by the material
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23FNON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F2201/00Type of materials to be protected by cathodic protection
    • C23F2201/02Concrete, e.g. reinforced

Definitions

  • the invention relates to electrodes based on thermoplastic macromolecular materials and conductive non-metallic additives and the use thereof.
  • Electrodes are used for various electrochemical purposes, especially in aqueous media, e.g. for the electrochemical synthesis of substances, for electrolysis, for measuring purposes or as sensors or in galvanic cells for storing electrical energy.
  • Electrodes There are no electrodes known which can be produced with thermoplastic processing methods (e.g. extrusion or injection molding) from mixtures of thermoplastic macromolecular materials with conductive non-metallic additives and which are stable under electrolysis conditions (cf. e.g. D. Kyriacon and D. Jannakondakis, "Electrocatalysis for Organic Synthesis ", New York 1986).
  • thermoplastic processing methods e.g. extrusion or injection molding
  • electrolysis conditions cf. e.g. D. Kyriacon and D. Jannakondakis, "Electrocatalysis for Organic Synthesis ", New York 1986.
  • a particularly interesting application for such electrodes under complex electrolytic conditions is electrical processes for removing capillary moisture in masonry. The capillary moisture and salinization of masonry as well as the corrosion of reinforced concrete is a serious economic and conservation problem.
  • EP-OS 100 845 and AT-OS 3101/82 network-like, conductive coated carbon fiber electrode: network quickly loses electrical contact with the electrode, which is also removed at short notice); M.W. Tenge, DE-OS 27 06 172 and 27 06 193, 27 05 814, 27 05 813 and 25 03 670 (soot-filled PTFE electrode; with ⁇ 2 V too low working voltage, poor contact with the masonry, very low conductivity).
  • the synthetic macromolecular material A is polar and stable with respect to the electrolysis medium, ie hydrolysis and especially oxidation stable in aqueous media.
  • the material can be processed thermoplastically and can, but need not, be crosslinkable.
  • macromolecular electrode component A polar substances, in particular EVA (ethylene vinyl acetate), CPE (chlorinated polyethylene), TPU (thermoplastic polyurethane), in particular Polyether polyurethane, hard and soft PVC (polyvinyl chloride), NBR (nitrile rubber), ABS (acrylonitrile-butadiene-styrene terpolymer), SBR (styrene-butadiene rubber), fluoroelastomers or mixtures of such substances have proven successful. They should be able to be wetted well by the electrolysis medium, but not be swollen, dissolved or (eg hydrolytically) decomposed.
  • the conductive additives B are non-metallic; on the one hand, they can modify the material in a conductive manner, on the other hand, they can build up a potential during use (e.g. measured against a reference electrode before or after a certain period of operation) without significantly affecting the system's operability.
  • Mixtures of a) so-called conductive carbon black (electrically conductive carbon black with a surface area of more than 600 m 2 / g) and / or carbon fibers and / or intrinsically conductive polymers with b) carbon black of lower conductivity with a surface area of less than 600 m 2 come as conductive additives B. / g, graphite, intrinsically conductive polymers (in complexed or compensated form) or transition metal oxides.
  • intrinsically conductive polymers e.g. To name polyacetylene, polypyrrole, polyphenylenes, polyanilines, polythiophenes, polyphthalocyanines and other polymers with conjugated ⁇ -electron systems. These conductive polymers can also form component B alone.
  • metal oxides e.g. Fe (II) / Fe (III) mixed oxides, MnO2, V2O3, Nb2O3 and others into consideration, that is to say those in which the transition metal can be converted into a higher, likewise stable oxidation state.
  • the conductive additives B are mixed in concentrations of 3 to 75% by weight, preferably 8 to 55% by weight, with 25 to 97, preferably 45 to 92% by weight of component A. If B is a mixture of conductive and potential stabilizing substances, they are used in weight ratios of 1: 4 to 4: 1.
  • the specific resistance preferred for use as electrodes is below 104 ⁇ cm, preferably below 103 ⁇ cm, particularly preferably below 2. 102 ⁇ cm.
  • the electrode material is produced on commercially available plastic processing machines such as twin-screw extruders, internal mixers or the like using conventional processing aids such as stabilizers, lubricants, fillers, etc.
  • the mass obtained is granulated or directly transformed into the later electrode shape (foils, plates, profiles, etc.).
  • the electrodes are used in a variety of processes, e.g. as sensors, as electrodes for electrolytic oxidation or reduction, for electrocatalysis, for dewatering - e.g. of masonry, sludge, peat and the like - for desalination or corrosion protection.
  • Electrodes were tested with 6 V DC voltage in aqueous NaCl solution. It was found that the current flow drops rapidly with graphite electrodes, and likewise with carbon fiber electrodes. Metal electrodes are consumed. Carbon-filled polymer electrodes made of e.g. cross-linked polyethylene, which contain a metal core, apparently always have contact problems and ultimately break down the metal core through a weak point; wetting by the electrolysis medium is poor.
  • the electrodes according to the invention surprisingly display a completely different behavior: after an initially constant current, the current flow increases by up to 50%, then drops slightly and stabilizes at least at the initial level, but often between the initial and the maximum level.
  • the initial current is essentially determined by the resistance of the electrodes and is therefore higher for the carbon fiber.
  • a comparable end resistance possibly only the outermost surface of the electrode according to the invention is changed, which simulates a higher resistance due to contact problems, while the internal resistance remains at the original level
  • the electrode according to the invention shows a current which is more than 10 times higher is even higher than the baseline.
  • the electrodes are placed in a flat form, e.g. in the form of foils or plates. Foils that have been punched out (to facilitate plastering) have proven effective for drying walls.
  • the foils are e.g. contacted by welding; these conductors can run inside the masonry, as can the contact point in the masonry (e.g. plaster); the contact between the voltage generator and the conductor must be outside the masonry with protection against moisture.
  • Direct and alternating voltages of the required size can be used to operate the electrodes.
  • use is preferably made between 4 and 48V, and pulsed DC voltage can be used to limit the current flow at voltages of more than 6V.
  • Another anode consisted of PVC and 40% polyaniline hydrochloride (No. 6), the cathode made of PVC, 40% polyaniline and 8% conductive carbon black.
  • a carbon fiber find (No. 7) is used as a further comparison electrode.
  • the electrodes are attached in an electrolysis vessel in spatially separate but electrolytically connected cylinders, the aqueous solution (2g NaCl / 100g H2O) only half covering the electrodes, so that the electrodes can be contacted with welded metal wires outside the electrolysis medium.
  • the cylinders have a valve at the top, so that gases can be periodically released during electrolysis.
  • Example 2 In a long-term test, three electrode compositions composed according to the invention were used as anode and cathode in an aqueous electrolysis according to Example 2. All electrodes contained conductive carbon black (Ketjenblack EC) as component Ba in soft PVC. No. 1 and No. 2 contained as component Bb graphite, No. 3 the mixed oxide of Example 2. The current profile is shown in FIG. 5 (not standardized on the electrode area).
  • conductive carbon black Ketjenblack EC

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Structural Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electrodes For Compound Or Non-Metal Manufacture (AREA)
  • Secondary Cells (AREA)
  • Battery Electrode And Active Subsutance (AREA)
  • Conductive Materials (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Primary Cells (AREA)
  • Hybrid Cells (AREA)
  • Electrolytic Production Of Metals (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)
EP87104615A 1986-03-27 1987-03-27 Electrode et son application Expired EP0244626B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87104615T ATE47529T1 (de) 1986-03-27 1987-03-27 Elektrode sowie deren verwendung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863610388 DE3610388A1 (de) 1986-03-27 1986-03-27 Stabile elektroden auf basis makromolekularer werkstoffe und verfahren zu ihrer verwendung
DE3610388 1986-03-27

Publications (2)

Publication Number Publication Date
EP0244626A1 true EP0244626A1 (fr) 1987-11-11
EP0244626B1 EP0244626B1 (fr) 1989-10-25

Family

ID=6297415

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87104615A Expired EP0244626B1 (fr) 1986-03-27 1987-03-27 Electrode et son application

Country Status (6)

Country Link
US (1) US4806212A (fr)
EP (1) EP0244626B1 (fr)
AT (1) ATE47529T1 (fr)
DE (2) DE3610388A1 (fr)
ES (1) ES2011275B3 (fr)
GR (1) GR3000319T3 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0333700A1 (fr) * 1988-03-15 1989-09-20 Steininger, Karl-Heinz, Dipl.-Ing.Dr.techn. Electrode
EP0421881A1 (fr) * 1989-10-05 1991-04-10 Electricite De France Matériau conducteur pour électrode, composant électrique et leur procédé de fabrication
WO1998020331A1 (fr) * 1996-11-07 1998-05-14 Cambridge Sensors Limited Electrodes et leur utilisation dans des dosages
EP2184316A1 (fr) 2008-11-06 2010-05-12 Clariant International Ltd. Composition comportant des cires de propylène-oléfine-copolymère et charbon noir

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3943420A1 (de) * 1989-12-30 1991-07-04 Zipperling Kessler & Co Verfahren zur herstellung von antistatisch bzw. elektrisch leitfaehig ausgeruesteten polymeren zusammensetzungen
US5476612A (en) * 1989-12-30 1995-12-19 Zipperling Kessler & Co., (Gmbh & Co.). Process for making antistatic or electrically conductive polymer compositions
DE4024268A1 (de) * 1990-07-31 1992-02-06 Lehmann & Voss & Co Elektrisch leitfaehiges kunststoffelement und seine verwendung
JPH0489561A (ja) * 1990-08-01 1992-03-23 Mitsubishi Petrochem Co Ltd クーロメトリック型電気化学検出器用電極
US5955834A (en) * 1996-08-02 1999-09-21 The Ohio State University Light emitting devices utilizing high work function electrodes
US6623870B1 (en) * 1996-08-02 2003-09-23 The Ohio State University Electroluminescence in light emitting polymers featuring deaggregated polymers
US6323659B1 (en) 1998-04-29 2001-11-27 General Electric Company Material for improved sensitivity of stray field electrodes
GB2352993B (en) * 1999-08-10 2003-12-24 Clive Alan Francis Blade sharpener
DE10058507A1 (de) * 2000-11-24 2002-06-06 Dutkewitz Wolfgang Vorrichtung zum induzierten, gerichteten Molekül- und Ionentransport in nichtkapillaren sowie insbesondere kapillaren Stoffen mittels dispergierter Elektroden und netzunabhängiger Solarstromversorgung (Sicco-Plan-System)
MX2008014300A (es) * 2006-05-08 2008-11-26 Siemens Water Tech Corp Aparato electrolitico con electrodo polimerico y metodos de preparacion y uso.
DE102007062504A1 (de) * 2007-12-20 2009-07-02 Horn GmbH Fabrik für Metall-, Silicon-, und Teflonverarbeitung Körperelektrode

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1229318A (fr) * 1958-07-04 1960-09-06 South African Council Scientif Matériaux à hautes conductivités électrique et thermique et haute inertie chimique, leurs produits de moulage et procédé pour les fabriquer
DE2549083A1 (de) * 1975-11-03 1977-05-05 Hans Prof Dr Meier Verfahren zur herstellung von sauerstoffelektroden, insbesondere fuer brennstoffzellen
DE2722985A1 (de) * 1977-05-20 1978-11-23 Inst Cercetari Constructi Verfahren und vorrichtung zur trockenlegung und trockenhaltung unterirdischer bauwerke bzw. bauwerksteile durch elektrodraenage
US4265727A (en) * 1979-10-22 1981-05-05 Hitco Composite electrodes
US4447505A (en) * 1980-12-13 1984-05-08 Electrochemische Energieconversie, N.V. Fuel cell electrode
DE3413303A1 (de) * 1983-05-06 1984-11-08 BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau Kathodischer, gas- und fluessigkeitsdurchlaessiger stromkollektor

Family Cites Families (13)

* Cited by examiner, † Cited by third party
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US4254727A (en) * 1959-12-30 1981-03-10 Moeller Kurt G F Shock-crush subfoundation
AT238417B (de) * 1962-02-19 1965-02-10 Curt Ing Meisel-Krone Elektrode für die Entfeuchtung bzw. Trockenlegung von Mauerwerk
DE2040510C3 (de) * 1970-08-14 1980-03-06 Dr. Karl Thomae Gmbh, 7950 Biberach Oxazole- und Thiazole eckige Klammer auf 5,4-d] azepin- Derivate
DE2705813A1 (de) * 1975-01-29 1978-08-17 Tenge Hans Werner Anlagen fuer die durchfuehrung elektro- physikalischer verfahren zur beeinflussung von fluessigkeiten in und an feststoffen
DE2706193A1 (de) * 1975-01-29 1978-08-17 Tenge Hans Werner Anordnung von elektroden bei elektro- physikalischen verfahren
DE2503670C2 (de) * 1975-01-29 1982-06-16 Hans-Werner 8025 Unterhaching Tenge Verfahren zur Beschleunigung oder Unterbindung und Umkehr der natürlichen Bewegung von Flüssigkeiten in Feststoffen mit poröser und/oder semipermeabler Struktur und Elektroden zur Durchführung des Verfahrens
DE2705814A1 (de) * 1975-01-29 1978-08-17 Tenge Hans Werner Verfahren zur elektro-kinetischen bzw. elektro-osmotischen bewegung von polaren bzw. polarisierten fluessigkeiten in und an poroesen und/oder semipermeablen feststoffen
US4534889A (en) * 1976-10-15 1985-08-13 Raychem Corporation PTC Compositions and devices comprising them
IT1122385B (it) * 1979-08-01 1986-04-23 Oronzio De Nora Impianti Elettrodo per celle elettrochimiche ad elettrolita solido
KR830007884A (ko) * 1980-10-31 1983-11-07 앤 시이 헤릭크 삼층으로 적층된 메트릭스 전극
AT375709B (de) * 1982-08-16 1984-09-10 Oppitz Hans Verfahren zur elektroosmotischen trockenlegung von mauerwerk od. dgl.
DD234997A3 (de) * 1983-10-04 1986-04-23 Adw Ddr Elektrodenanordnung zur elektrochemischen entsalzung undtrocknung von mauerwerk
GB2169608B (en) * 1984-12-28 1988-02-24 Hoechst Gosei Kk Process for producting electrically conductive composite polymer article

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1229318A (fr) * 1958-07-04 1960-09-06 South African Council Scientif Matériaux à hautes conductivités électrique et thermique et haute inertie chimique, leurs produits de moulage et procédé pour les fabriquer
DE2549083A1 (de) * 1975-11-03 1977-05-05 Hans Prof Dr Meier Verfahren zur herstellung von sauerstoffelektroden, insbesondere fuer brennstoffzellen
DE2722985A1 (de) * 1977-05-20 1978-11-23 Inst Cercetari Constructi Verfahren und vorrichtung zur trockenlegung und trockenhaltung unterirdischer bauwerke bzw. bauwerksteile durch elektrodraenage
US4265727A (en) * 1979-10-22 1981-05-05 Hitco Composite electrodes
US4447505A (en) * 1980-12-13 1984-05-08 Electrochemische Energieconversie, N.V. Fuel cell electrode
DE3413303A1 (de) * 1983-05-06 1984-11-08 BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau Kathodischer, gas- und fluessigkeitsdurchlaessiger stromkollektor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
CHEMICAL ABSTRACTS, Band 92, Nr. 12, 24. März 1980, Seite 278, Zusammenfassung Nr. 98602v, Columbus, Ohio, US; & PL-A-99 115 (POLITECHNIKA WROCLAWSKA) 30-10-1978 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0333700A1 (fr) * 1988-03-15 1989-09-20 Steininger, Karl-Heinz, Dipl.-Ing.Dr.techn. Electrode
EP0421881A1 (fr) * 1989-10-05 1991-04-10 Electricite De France Matériau conducteur pour électrode, composant électrique et leur procédé de fabrication
FR2652943A1 (fr) * 1989-10-05 1991-04-12 Electricite De France Materiau conducteur pour electrode, composant electrique et leur procede de fabrication.
WO1998020331A1 (fr) * 1996-11-07 1998-05-14 Cambridge Sensors Limited Electrodes et leur utilisation dans des dosages
US6309535B1 (en) 1996-11-07 2001-10-30 Cambridge Sensors Limited Electrodes and their use in assays
EP2184316A1 (fr) 2008-11-06 2010-05-12 Clariant International Ltd. Composition comportant des cires de propylène-oléfine-copolymère et charbon noir
US8741183B2 (en) 2008-11-06 2014-06-03 Clariant Finance (Bvi) Limited Compositions comprising propylene-olefin-copolymer waxes and carbon black

Also Published As

Publication number Publication date
ES2011275B3 (es) 1990-01-01
DE3610388A1 (de) 1987-10-01
EP0244626B1 (fr) 1989-10-25
US4806212A (en) 1989-02-21
ATE47529T1 (de) 1989-11-15
DE3760843D1 (en) 1989-11-30
GR3000319T3 (en) 1991-06-07
DE3610388C2 (fr) 1987-12-23

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