| 摘要 |
<p>The membrane according to the invention is a flat symmetrical carbon membrane formed by a thick microporous carbon layer with a thickness ranging between 2 and 3 νm, having molecular screening properties and supported on a (flat) macroporous or (tubular) ceramic type carbon substrate. Preparation of the carbon membrane disclosed in the invention comprised the following steps: the polymer (phenolic resin) is dissolved in methanol; another solvent was occasionally used as diluent; the polymeric solution was deposited and expanded homogeneously on the surface of the substrate; the polymeric membrane thus obtained was air-dried; the dried polymeric substrate deposited on the substrate was slowly vacuum heated to a temperature such at which decomposition of the polymer and transformation of the latter into a microporous carbon film occur.</p> |
