Preparation of platinum loaded carbon fiber by using a polymer blend

Ozaki, Jun‐ichi; Ohizumi, W.; Endo, Naoto; Ōya, Asao; Yoshida, Shigeo; Iizuka, T.; Román-Martı́nez, M.C.; Linares‐Solano, A.

doi:10.1016/s0008-6223(97)82802-3

Cited by 16 publications

(1 citation statement)

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“…The present authors have been interested in controlling carbonization of phenol resin by modifying the polymer to obtain porous carbon fibers without an activation process. − In the course of the study, we have found that the treatment with supercritical methanol gave liquid products from a phenol resin fiber. As far as we know, depolymerization of phenol resin in supercritical methanol has not been studied.…”

Section: Introductionmentioning

confidence: 99%

Chemical Recycling of Phenol Resin by Supercritical Methanol

Ozaki

Djaja

Ōya

2000

Ind. Eng. Chem. Res.

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Thermosetting resin is one of the most difficult substances to be recycled, because it includes a highly cross-linked structure which gives the polymer chemical and thermal resistances. A preliminary study on the technique to recycle phenol resin was conducted in the present study, which was intended to be achieved by the use of a supercritical fluid. Supercritical methanol was employed because it has the following advantages over supercritical water: i.e., it allows milder reaction conditions and easier operation for the separation of the products from the solvent. The reaction of phenol resin in supercritical methanol was studied by varying the temperature in the range of 300-420 °C or changing the reaction time 30-150 min to understand the effects of the reaction temperature and of the reaction time. The conversion increased rapidly above 350 °C to give 94% at maximum at 420 °C, and the gas fraction also increased at the same time. When a longer reaction time was employed for the reaction at 400 °C, the conversion increased without giving additional gas product. From the point of view of liquefaction, the longer reaction at lower temperature would give better results. A gas chromatographic study revealed that the liquid product included phenol and its methylated derivatives. The carbon content of the solid product was higher than the initial phenol resin, showing that some carbonization took place during the reaction.

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Section: Introductionmentioning

confidence: 99%