摘要:
A modified carbonaceous material having chemically bound on its surface at least one fluoropolyoxyalkylene chain (chain Rf) and a process for the modification of a carbonaceous material [material (C)]. The process comprises: contacting the material (C) with a (per)fluoropolyether peroxide comprising at least one peroxidic moiety comprised between sp3 carbon atoms and at least one fluoropolyoxyalkene chain (chain Rf), i.e. a fluorocarbon segment comprising ether linkages in main chain [peroxide (P)]; and heating the material (C) while in contact with the peroxide (P) at a temperature exceeding decomposition temperature of the peroxide (P).
摘要:
A modified carbonaceous material having chemically bound on its surface at least one fluoropolyoxyalkylene chain (chain Rf) and a process for the modification of a carbonaceous material [material (C)]. The process comprises: contacting the material (C) with a (per)fluoropolyether peroxide comprising at least one peroxidic moiety comprised between sp3 carbon atoms and at least one fluoropolyoxyalkene chain (chain Rf), i.e. a fluorocarbon segment comprising ether linkages in main chain [peroxide (P)]; and heating the material (C) while in contact with the peroxide (P) at a temperature exceeding decomposition temperature of the peroxide (P).
摘要:
Novel imidazolium salts of formula (I) are described in which R is a C1-C14 alkyl group, optionally substituted by one or more fluorine atoms, or a C2-C18 alkoxyalkyl group, R′ is an alkyl group containing at least 8 carbon atoms, at least 6 of which are partially or entirely fluorinated, R″ is hydrogen or C1-C3 alkyl, Z is an organic or inorganic anion, and Q is further defined. The compounds of formula (I) are liquid crystals over a wide temperature range, and are characterised by high conductivity, hydrophobicity and stability. These properties made them ideally suitable for use in devices based on electrochemical reactions, such as solar cells, fuel cells, electrochemical sensors, lithium batteries and capacitors, etc.
摘要:
The invention concerns a process for purifying α,ω-diiodoperfluorinated compounds of formula 1-(CF2CF2Y)m—I comprising contacting an impure α,ω-diiodoperfluorinated compound with a suitable sequestering agent, with formation of a reversible adduct and separating the α,ω-diiodoperfluorinated compound from the adduct itself. Diammonium dihalogenids of the general formula [R1,2,3N—(CH2)n—NR4,5,6]2*2X (R1-6=alkyl C1-C6n=8-26, X═I, Br, Cl) also called ‘methonium compounds’ are the preferred sequestering agents.
摘要:
Novel imidazolium salts of formula (I) are described in which R is a C1-C14 alkyl group, optionally substituted by one or more fluorine atoms, or a C2-C18 alkoxyalkyl group, R′ is an alkyl group containing at least 8 carbon atoms, at least 6 of which are partially or entirely fluorinated, R″ is hydrogen or C1-C3 alkyl, Z is an organic or inorganic anion, and Q is further defined. The compounds of formula (I) are liquid crystals over a wide temperature range, and are characterized by high conductivity, hydrophobicity and stability. These properties made them ideally suitable for use in devices based on electrochemical reactions, such as solar cells, fuel cells, electrochemical sensors, lithium batteries and capacitors, etc.
摘要:
The present invention relates to the use of perfluorinated compounds as a surface coating to counteract the formation of fouling. The present invention also relates to a method for producing a surface coating capable of preventing the formation of fouling, this method comprising the application of a polar solution of a perfluorinated compound followed by a heat cycle conducted at controlled temperatures.