| 摘要 |
A membrane-forming dope solution for carbon membranes, comprising a polyphenyleneoxide polymer, ammonium nitrate, and a solvent having a boiling point of 100°C or more and being capable of dissolving these components; the membrane-forming dope solution having a concentration of the polyphenyleneoxide polymer of 20 to 40 wt.%, and a concentration of the ammonium nitrate of 1 to 10 wt.%. The membrane-forming dope solution for carbon membranes is subjected to vacuum defoaming, and then subjected to a spinning step, thereby producing a carbon hollow fiber membrane. The use of the membrane-forming dope solution for carbon membranes can reduce yarn breakage during spinning or the formation of pinhole defects in the resulting polymer hollow fiber membranes. |
