EP2300365A2 - Verfahren zur modifizierung von expandiertem graphit und verwendung des modifizierten expandierten graphits - Google Patents
Verfahren zur modifizierung von expandiertem graphit und verwendung des modifizierten expandierten graphitsInfo
- Publication number
- EP2300365A2 EP2300365A2 EP09776887A EP09776887A EP2300365A2 EP 2300365 A2 EP2300365 A2 EP 2300365A2 EP 09776887 A EP09776887 A EP 09776887A EP 09776887 A EP09776887 A EP 09776887A EP 2300365 A2 EP2300365 A2 EP 2300365A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- expanded graphite
- process gas
- plasma
- modified
- gas
- 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.)
- Withdrawn
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/44—Carbon
- C09C1/46—Graphite
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
- B01J20/3231—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the coating or impregnating layer
- B01J20/3242—Layers with a functional group, e.g. an affinity material, a ligand, a reactant or a complexing group
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/18—Carbon
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/20—Graphite
- C01B32/21—After-treatment
- C01B32/22—Intercalation
- C01B32/225—Expansion; Exfoliation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/70—Non-metallic catalysts, additives or dopants
- B01D2255/702—Carbon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/34—Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves ; Ionic sputtering; Flame or plasma spraying; Particle radiation
- B01J37/349—Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves ; Ionic sputtering; Flame or plasma spraying; Particle radiation making use of flames, plasmas or lasers
Definitions
- the invention relates to a method for producing surface-modified expanded graphite and to uses of this surface-modified expanded graphite.
- Expanded graphites are generally well wetted with nonpolar media such as oil (US 005282975A), but not with polar media such as water.
- polar media such as water.
- responsible for the poor wettability of expanded graphite with polar media is the absence of polar chemical surface groups.
- DE-C-66804 discloses the production of expanded graphitic particles having a worm-like structuring by the thermal decomposition of a graphite particle.
- the oxygen groups generated in an acid intercalation under oxidative conditions are largely destroyed by the thermal treatment leading to expansion.
- the functional groups can be obtained by lowering the expansion temperature in the production of expanded graphite from graphite salt. However, the degree of expansion is reduced, which is undesirable for many applications.
- the process according to the invention produces functional surface groups on expanded graphite with a plasma chemical vapor phase process. It has surprisingly been found that even a few atomic percent of plasma-generated functional groups on expanded graphite are sufficient to significantly alter the interaction of the expanded graphite with polar media.
- An advantage of the method according to the invention is that the type and the surface density of plasma-chemically generated functional surface groups on expanded graphites can be varied within a very wide range. Not only oxygen functionalities but also numerous other functional groups, e.g. nitrogen-containing, halogen-containing or phosphorus-containing groups are generated. This can lead to the improvement of the infiltrability of expanded graphites with different, preferably polar, media. Oxygen-functional groups generated in a plasma-mixed manner have a high long-term stability.
- expanded graphite can be used for numerous applications.
- the surface of the expanded graphite is modified in a suitably selected process by means of a process gas in the presence of a plasma by the incorporation of chemical groups.
- the plasma-chemically generated surface groups change the chemical and physisorptive properties of the surface of the expanded graphite.
- the plasma serves as a source of high-energy species, such as rotatory, vibratory and / or electronically excited molecules or radicals, electronically excited atoms or ions of the surrounding gas atmosphere, as well as electrons and photons. Unless this species is sufficiently Enthalpy, they activate chemical bonds of the graphite, so that it can lead to bond breaks and the formation of reaction products with species of the process gas, which allows the formation of chemical groups on the surface of the expanded graphite. Their chemical composition influences the wettability of the plasma-chemically modified expanded graphite.
- the transfer of energy from an energy source to the atoms or molecules of a suitably selected process gas and the graphite surface may be by ions, electrons, electrons or electromagnetic fields including radiation.
- the excitation of a gas to a plasma in a very large pressure range in particular from 0.1 to 500,000 Pa, preferably in the low pressure range of 1 to 100 Pa or in the high pressure range of 50,000 to 150,000 Pa, and in the normal pressure range by a DC gas discharge or AC gas discharge, a high-energy electromagnetic radiation field, such as, for example, generates a microwave source or a laser, or, alternatively, an electron or ion source can be realized.
- the plasma can be operated continuously or discontinuously.
- the neutral gas component can, depending on the type of excitation of the plasma, cold, i. in the range below about 700 K, as in the case of a low temperature plasma, or hot, i. in the range above about 700 K, as in the case of a thermal plasma.
- Expanded graphite produced by thermal expansion having an initial oxygen content of 1.2% oxygen atoms per carbon atom (O / C) of the graphite surface, was sintered at 25 Pa in a microwave-fed oxygen plasma at 300 W for 100 s, 150 s, 200 s and 250 s, respectively Performance treated.
- Tablets having a density of 0.12 g / ml and 0.06 g / ml were prepared by compaction from the expanded graphite modified from Example 1 and from the starting material by compaction. These were placed on a water surface for 5 minutes. Subsequently, the weight gain was determined and compared. The result shown in FIG. 2 shows a correlation between the weight increase of the pellets caused by a water absorption and the oxygen content on the surface of the expanded graphite.
- Tablets having a density of 0.08 g / ml were produced by compaction from the expanded graphite modified in Example 3 and from the starting material by compaction. These were placed on the surface of the liquid monomer (2-hydroxyethyl) methacrylate for 5 minutes. Subsequently, the weight gain was determined and compared. The monomer uptake of the modified material tablet was 50% greater than that of the starting material tablet. Higher monomer absorption results in organic composites with lower residual porosity.
- Tablets having a density of 0.08 g / ml were produced by compression from the expanded graphite modified in Example 3 and from the starting material by compression. These were stored for 16 hours in a steam atmosphere, as they are at Room temperature in a partially filled with water, closed container sets. Subsequently, the weight gain of the tablets was determined and compared. It was found that the tablets of modified expanded graphite compared to the tablets from the starting material showed a by a factor of 2.5 increased weight gain by water vapor sorption.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008033280A DE102008033280A1 (de) | 2008-07-11 | 2008-07-11 | Verfahren zur Modifizierung von expandiertem Graphit und Verwendung des modifizierten expandierten Graphits |
PCT/EP2009/004708 WO2010003571A2 (de) | 2008-07-11 | 2009-06-25 | Verfahren zur modifizierung von expandiertem graphit und verwendung des modifizierten expandierten graphits |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2300365A2 true EP2300365A2 (de) | 2011-03-30 |
Family
ID=41202301
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09776887A Withdrawn EP2300365A2 (de) | 2008-07-11 | 2009-06-25 | Verfahren zur modifizierung von expandiertem graphit und verwendung des modifizierten expandierten graphits |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2300365A2 (de) |
DE (1) | DE102008033280A1 (de) |
WO (1) | WO2010003571A2 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106397094A (zh) * | 2016-10-27 | 2017-02-15 | 新疆兵团现代绿色氯碱化工工程研究中心(有限公司) | 一种低温等离子体改性催化剂载体的方法 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT510311B1 (de) * | 2010-08-27 | 2013-02-15 | Sunpor Kunststoff Gmbh | Flammgeschützte, wärmedämmende polymerisate und verfahren zu deren herstellung |
CN108031233A (zh) * | 2017-12-13 | 2018-05-15 | 滁州兄弟科技有限公司 | 一种氮氧化物废物气处理用复合吸附材料的制备方法 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008138990A1 (de) * | 2007-05-16 | 2008-11-20 | Sgl Carbon Ag | Verfahren zur herstellung eines latentwärme-speichermaterials |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE66804C (de) | Dr. phil. W. luzi in Leipzig, Hospitalstr. 18 | Verfahren zur Aufbereitung von Graphit | ||
JPH01122911A (ja) * | 1987-11-07 | 1989-05-16 | Nippon Steel Corp | 表面硬質化黒鉛材料の製造方法 |
SU1657473A1 (ru) * | 1988-07-11 | 1991-06-23 | Институт элементоорганических соединений им.А.Н.Несмеянова | Способ получени термически расширенного графита |
US5282975A (en) | 1989-12-25 | 1994-02-01 | Technion Research And Development Foundation Ltd. | Removal of oil from water |
FR2715082B1 (fr) * | 1994-01-19 | 1996-02-23 | Elf Aquitaine | Procédé de réalisation d'un composite actif et composite actif réalisé à partir de ce procédé. |
DE4432865A1 (de) * | 1994-09-15 | 1996-03-21 | Plasmachem Produktions Und Han | Hochorientiertes Pyrographit (HOPG) mit Oberflächendefekten, regulär in Form, Größen, Tiefe und Oberflächendichte und Herstellungsverfahren dafür |
EP0975040A1 (de) * | 1998-02-06 | 2000-01-26 | Nisshinbo Industries, Inc. | Separator für brennstoffzellen und verfahren zu dessen herstellung |
RU2184086C1 (ru) * | 2001-04-02 | 2002-06-27 | Петрик Виктор Иванович | Способ удаления нефти, нефтепродуктов и/или химических загрязнителей из жидкости, и/или газа и/или с поверхности |
JP4422439B2 (ja) * | 2003-06-30 | 2010-02-24 | Tdk株式会社 | 電極用炭素材料及びその製造方法、電池用電極及びその製造方法、並びに、電池及びその製造方法 |
CN100490970C (zh) * | 2005-10-24 | 2009-05-27 | 南开大学 | 膨胀石墨负载NiB非晶态合金催化剂和制备方法及应用 |
US7985722B2 (en) | 2006-07-27 | 2011-07-26 | Aurora Advanced Beauty Labs | Rhamnolipid-based formulations |
-
2008
- 2008-07-11 DE DE102008033280A patent/DE102008033280A1/de not_active Withdrawn
-
2009
- 2009-06-25 WO PCT/EP2009/004708 patent/WO2010003571A2/de active Application Filing
- 2009-06-25 EP EP09776887A patent/EP2300365A2/de not_active Withdrawn
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008138990A1 (de) * | 2007-05-16 | 2008-11-20 | Sgl Carbon Ag | Verfahren zur herstellung eines latentwärme-speichermaterials |
Non-Patent Citations (1)
Title |
---|
See also references of WO2010003571A2 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106397094A (zh) * | 2016-10-27 | 2017-02-15 | 新疆兵团现代绿色氯碱化工工程研究中心(有限公司) | 一种低温等离子体改性催化剂载体的方法 |
Also Published As
Publication number | Publication date |
---|---|
WO2010003571A2 (de) | 2010-01-14 |
DE102008033280A1 (de) | 2010-01-14 |
WO2010003571A3 (de) | 2010-07-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE102007053652A1 (de) | Expandierter Graphit und Verfahren zu seiner Herstellung | |
EP0655516B1 (de) | Verfahren zur Beschichtung oder Oberflächenbehandlung von Feststoffteilchen mittels einer Plasma-Wirbelschicht | |
DE2741427C2 (de) | Verfahren zur Herstellung von verbesserten Calciumcarbonat-Teilchen und deren Verwendung als Füllstoff | |
EP1095907B1 (de) | Verfahren zur plasmakatalytischen Erzeugung von Ammoniak | |
DE102009049379A1 (de) | Verbundmaterialien mit Graphenlagen und deren Herstellung und Verwendung | |
EP1901995A2 (de) | Kohlenstoff-nanopartikel, deren herstellung und deren verwendung | |
WO2010000424A2 (de) | Ein hocheffizientes gasphasenverfahren zur modifizierung und funktionalisierung von kohlenstoff-nanofasern mit salpetersäuredampf | |
WO2010040335A2 (de) | Adsorberelement und verfahren zur herstellung eines adsorberelements | |
WO2010003571A2 (de) | Verfahren zur modifizierung von expandiertem graphit und verwendung des modifizierten expandierten graphits | |
EP1051266A1 (de) | Polare polymerartige beschichtung | |
DE102012024329B4 (de) | Verfahren zur Herstellung von reduziertem Graphenoxid sowie damit hergestelltes reduziertes Graphenoxid und dessen Verwendung | |
DE102006015591B3 (de) | Organischer Werkstoff mit katalytisch beschichteter Oberfläche und Verfahren zu dessen Herstellung | |
EP3248939A1 (de) | Organofunktionelle siliziumpartikel, verfahren zu deren herstellung sowie deren verwendung | |
DE102005038554A1 (de) | Verfahren zur Herstellung von Kugelaktivkohle | |
DE102011000662A1 (de) | Verfahren zur Herstellung von Graphen-Nanolagen | |
EP2387456B1 (de) | Verfahren zur modifizierung der oberfläche von partikeln und hierzu geeignete vorrichtung | |
DE2528374C3 (de) | Verfahren zur Regenerierung von verbrauchtem Polytetrafluorethylen | |
DE102008056968A1 (de) | Verfahren zum Abscheiden einer Nanokomposit-Schicht auf einem Substrat mittels chemischer Dampfabscheidung | |
EP2366730B1 (de) | Verfahren zur chemischen modifizierung der polymeren oberfläche eines partikulären feststoffs | |
WO2023102584A1 (de) | Verfahren zur herstellung von nanoplättchen aus g-c3n4/metall-verbundmaterial | |
DE102019000683A1 (de) | Verfahren zur Herstellung von Kern-Schale-Nanopartikel bei Raumtemperatur für die photokatalytische Wasserspaltung | |
DE102020133062A1 (de) | Vielzahl von Partikeln mit Beschichtung und Verfahren zu deren Herstellung | |
DE4334198A1 (de) | Verfahren zur Reduktion von Sulfoxidgruppen in Polymeren | |
Yan et al. | A new loading method for nanopaper and nanoparticles composite | |
EP2303802B1 (de) | Verfahren zur entfernung einer oberflächenschicht, formkörper und verwendung des formkörpers |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20110110 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR |
|
AX | Request for extension of the european patent |
Extension state: AL BA RS |
|
DAX | Request for extension of the european patent (deleted) | ||
17Q | First examination report despatched |
Effective date: 20120402 |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: BAM BUNDESANSTALT FUER MATERIALFORSCHUNG UND -PRUE |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
|
18W | Application withdrawn |
Effective date: 20140313 |