正渗透过程是以渗透压差为驱动力的膜过程。其中膜的结构参数是决定膜的传质阻力和水通量的关键因素。本文系统介绍了本课题组在调控界面聚合正渗透膜材料结构参数方面的研究进展。利用共混亲水高分子材料调节基膜的亲水性，利用双层刮膜技术调节基膜的孔结构。结果表明利用亲水基膜和具有贯通孔结构的基膜获得FO膜具有更低的膜结构参数，其正渗透性能也更高。

Forward osmosis (FO) process is driven by the osmotic pressure differential across a semipermeable membrane. The structural parameter of the FO membrane is critical in determining mass transfer resistance and, eventually, the performance of the corresponding membrane. Herein the research progress is reported on the tuning of membrane structural parameter of thin film composite membranes. Two approaches are reported namely, controlling the wettability of PSf by blending with PVP, and tuning the PSf pore structure via co-casting. Results demonstrated that both approaches have yielded membranes with reduced S values of the support layers and consequently better TFC FO membranes than purely PSf based TFC membranes or HTI CTA membranes.

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