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采用聚四氟乙烯粉末与氧化铝平板陶瓷膜进行高温烧结改性的方式,制备了有较高疏水性的陶瓷复合膜。通过扫描电镜、能谱仪、红外光谱及静态接触角测量仪研究了复合膜的表面形貌和化学结构。结果表明,制备的疏水性陶瓷复合膜在油中的疏水性能变化不大,能够较好的应用于油水分离。增大操作压力、料液温度或降低水含量都可以增加膜的渗透通量。当操作压力为0.1 MPa、混合液温度为25℃,水的质量分数为3%时,制备的疏水性陶瓷复合膜的渗透初始通量为12 L/(m~2·h),截留率可达98.75%。
Polytetrafluoroethylene powder and alumina flat ceramic membranes were modified by high temperature sintering to prepare ceramic composite membranes with higher hydrophobicity. The surface morphology and chemical structure of the composite membrane were studied by scanning electron microscopy, energy dispersive spectroscopy, infrared spectroscopy and static contact angle measurement. The results show that the prepared hydrophobic ceramic composite membrane in the hydrophobic properties of oil little change, can be better applied to oil-water separation. Increasing the operating pressure, feed temperature, or water content can all increase membrane permeate flux. When the operating pressure is 0.1 MPa, the temperature of the mixture is 25 ℃ and the mass fraction of water is 3%, the initial permeation flux of the hydrophobic ceramic composite membrane is 12 L / (m ~ 2 · h) Up to 98.75%.