管式炭膜孔结构及强度控制

The Pore Structure and Strength Control of Tube Carbon Membrane

以石油焦为原料,研究了原料粒度及混入中温沥青、酚醛树脂、田菁粉和淀粉等添加剂对管式炭膜孔结构和膜强度的影响。结果表明,随原料平均粒径的减小,所制得管式炭膜的平均孔径减小,但强度增大;加入酚醛树脂、田菁粉和淀粉等添加剂使炭膜孔径增大,但强度减小,而加入中温沥青则与之相反;以田菁粉为添加剂时炭膜的平均孔径达0.319μm,强度为4.40N/mm,以中温沥青为添加剂时炭膜的平均孔径为0.174μm,但强度高达13.78N/mm。

The influence on the pore structure and strength of the tube carbon membrane by changing the size of raw materials granularity and mixing with medium temperature pitch, phenolic resin, sesbania powder, starch as additives is investigated. The results show that the average pore size of tube carbon membrane decreases with the decrease of the average particle size of raw materials, but the strength grows. And the pore size of carbon membrane increase largely when phenolic resin, sesbania powder, starch are added, but the strength decreased, while the temperature pitch is in the opposite. To sesbania powder as additive, the average pore size is up to 0. 319μm, its strength is 4. 40N/mm. To medium temperature pitch as additive, the average pore size is 0. 174μm, but its strength is up to 13. 78N/mm.