Development of ceramic reverse osmosis membranes and permeation properties through microporous membranes

以双(三乙氧基硅基)乙烷(BTESE)为原料，成功制备了有机硅杂化膜，并将其应用于反渗透海水淡化。有机硅膜的截留率高达95%以上，显示出作为海水淡化膜的潜力，并在高达90℃的温度循环下具有优异的水热稳定性。随着操作压力的增加，水通量和盐截留率增加，而通量和截留率随着盐浓度的增加而减小。膜的渗透活化能随膜孔径的增大而增大，且明显大于水的粘度活化能，说明水的渗透机理不同于粘性流动。

Hybrid organosilica membranes were successfully prepared using bis(triethoxysilyl)ethane (BTESE) and applied to reverse osmosis (RO) desalination. The organosilica membranes exhibited high rejection over 95%, which showed a potential for desalination membranes, and exceptional hydrothermal stability in temperature cycles up to 90 ℃. Increasing the operating pressure led to an increase in water flux and salt rejection, while the flux and rejection decreased as salt concentration increased. Observed activation energies for permeation were larger for membranes with a smaller pore size, and were considerably larger than the activation energy for water viscosity, suggesting that the water permeation mechanism differed from the viscous flow.