Surface Modification of Carbon Fiber by using Electro-oxidation and -reduction Sequential Procedure

Suzuki, Ryuhei; Ishifune, Manabu; Mima, Yasuo; Uchida, Kenzo

doi:10.5796/electrochemistry.74.226

Cited by 3 publications

(8 citation statements)

References 23 publications

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“…In our previous study the C 1s peak of the phenolic structure of the anodically oxidized carbon fiber was observed at 286.8 eV. 15 These results indicate that phenolic hydroxyl groups are mainly introduced on the graphite surface under the anodic oxidations. 18 In order to graft thermoresponsive PNIPAAm chains from the graphite surface was prepared 4-cyano-4-[(dodecylsulfanylthiocarbonyl)sulfanyl]pentanoyl chloride as a RAFT reagent.…”

Section: Electrooxidation Of Graphite Electrodementioning

confidence: 98%

“…Tetrahydrofuran (THF) was distilled from Na-benzophenoneketyl under an argon atmosphere. Pure water was prepared by purification of distilled water using the Simplicity Personal Ultrapure Water System SIMS 700 0J (Millipore Co., Ltd. 14,15 A solution of LiNO 3 (2 mmol) as a supporting electrolyte in the mixed solvent (MeCN:H 2 O = 10:1, 50 mL) was put into an undivided electrolysis cell equipped with a graphite rod (6 mm diameter © 20 mm long) as an anode and a platinum plate (20 © 20 mm) as a cathode. The electrooxidation was carried out under the conditions of constant current (50 mA) with cooling by an ice bath.…”

Section: Methodsmentioning

confidence: 99%

“…It has been already achieved in our previous studies 14,15 that the phenolic hydroxyl groups are introduced on carbon fiber by the electrooxidation of the LiNO 3 containing electrolyte using the carbon fiber as an anode. In this study, we have first applied our procedure to the oxidation of graphite rod surface (Scheme 1).…”

Section: Electrooxidation Of Graphite Electrodementioning

confidence: 99%

“…Concerning the modification of carbon base electrodes, we have already achieved the introduction of hydroxyl groups on the carbon fiber surface using NO 3 radicals generated by the electrooxidation of NO 3 anions. 14,15 Several functional molecules such as B-cyclodextrin were successfully fixed on the carbon fiber by ether bonding of the anodically introduced hydroxyl groups on the carbon fiber with suitable halides or tosylates. 16,17 For end group control and grafting polymer chains from the solid materials was highly useful the living radical polymerization technique such as reversible addition-fragmentation chain transfer (RAFT) polymerization.…”

Section: Introductionmentioning

confidence: 99%

“…From the viewpoints of environmental protection alternative solvents such as water, 15 supercritical fluids, 6,7 and ionic liquids 811 have been actively studied in the field of electrochemical synthesis. Water is an ideal solvent, however, low solubility of organic substrates and electrolysis of water itself restrict the use of water as a solvent of electrochemical reactions of organic compounds.…”

Section: Introductionmentioning

confidence: 99%

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Preparation of Thermoresponsive Polymer-Modified Electrodes Having a TEMPO Moiety

2013

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Thermoresponsive polymers having 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) moieties were fixed on the graphite surface by using the reversible addition-fragmentation chain transfer (RAFT) graft polymerization technique. The surface of graphite has been anodically oxidized by using our original electrochemical method, and then modified with 4-cyano-4-[(dodecylsulfanylthiocarbonyl)sulfanyl]pentanoyloxy groups (RAFT reagents) by esterification with the corresponding acid chlorides. From the resulting RAFT reagent-modified graphite, 2,2,6,6-tetramethyl-4-piperidyl methacrylate (TEMPMA) and N-isopropylacrylamide (NIPAAm) monomers were copolymerized stepwise under RAFT polymerization conditions to afford the thermoresponsive block-copolymer-grafted graphite, poly(TEMPMA)-block-PNIPAAm-grafted graphite. N-Oxylation of tetramethylpiperidyl groups on the resulting graphite successfully afforded the corresponding TEMPO-containing thermoresponsive polymer-grafted graphite. Redox behavior of the resulting graphites was observed by cyclic voltammetry. The potential and intensity of the cathodic current peaks were discontinuously changed below and above the lower critical solution temperature (LCST) of the grafted thermoresponsive polymers. These results indicate that the phase transition of the thermoresponsive polymer on the graphite influences the electron transfer between the TEMPO moieties and the graphite surface.

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Section: Electrooxidation Of Graphite Electrodementioning

confidence: 98%

Section: Methodsmentioning

confidence: 99%

Section: Electrooxidation Of Graphite Electrodementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Preparation of Thermoresponsive Polymer-Modified Electrodes Having a TEMPO Moiety

2013

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Performances of novel poly(diaryloxyphosphazene) based heat shielding materials with various fibrous reinforcements

Zhang

Basharat

et al. 2021

J of Applied Polymer Sci

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Elastomeric heat shielding materials (EHSMs) are necessary to protect combustion chambers of solid rocket motors during their working.Poly(diaryloxyphosphazene) (PDPP) elastomers own inherent thermal stability and flame retardancy because the backbone of alternating phosphorus and nitrogen atoms can be a novel promising polymer matrix toward EHSMs. The present study deals with the development of a novel PDPP based EHSMs with several different fibrous reinforcements, including Kevlar, polyimide, and carbon short fibers. It is found that PDPP/Kevlar composites show outstanding tensile strength and ablation resistance because of their strong interfacial bonding between matrix and fibers which benefits from the possible network of intermolecular hydrogen bonds. PDPP/carbon composites produce a compact charred layer due to their high char yields of carbon fibers. These results improve the understanding of the role of polyphosphazenes with different kinds of fibers on ablation mechanisms, which enable the possibility to exploit intrinsic properties of polyphosphazenes.

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Modern Strategies in Electroorganic Synthesis

et al. 2008

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Surface Modification of Carbon Fiber by using Electro-oxidation and -reduction Sequential Procedure

Cited by 3 publications

References 23 publications

Preparation of Thermoresponsive Polymer-Modified Electrodes Having a TEMPO Moiety

Preparation of Thermoresponsive Polymer-Modified Electrodes Having a TEMPO Moiety

Performances of novel poly(diaryloxyphosphazene) based heat shielding materials with various fibrous reinforcements

Modern Strategies in Electroorganic Synthesis

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