Abstract: The carbon molecule sieve membrane was prepared with coating solution of novolac phenol formaldehyde (PF) resin containing hexamine on the outer of green support from the same material. The top layer and green support were carbonized at one time. In this way, the cracks and pinholes of top layer can be eliminated effectively. The ideal selectivity of H2/CH4 and H2/N2 were 171 and 74 respectively. The obtained carbon membrane has smooth surface without pinholes judged by a scanning electron microscope. The coating solution, properties of support and soaking time have obvious effects on the properties of membrane. Molecular sieving appears to contribute to the gas permeation.

Key words: carbon molecule sieve membrane, novolac phenol formaldehyde resin, carbonization, gas permeation

摘要： 以含六次甲基四胺的热塑性酚醛树脂的乙醇溶液为涂膜液，采用浸渍法在支撑体原膜上涂膜，干燥后一步碳化制备了分子筛碳膜，有效地解决了碳膜制备中分离层易产生针眼﹑裂纹的问题，扫描电镜显示分离层与支撑体结合良好，膜表面光滑无缺陷，所制碳膜H2/CH4的分离系数达到171, H2/N2的分离系数达到74. 实验发现，涂膜液性质、支撑体的孔径以及表面粗糙度、浸渍时间对碳膜的性能有显著影响. 碳膜分离气体的机理主要为分子筛分.

关键词: 分子筛碳膜, 热塑性酚醛树脂, 碳化, 气体渗透