CAJ | 학술논문

通过调节铸膜液中聚砜浓度和非溶剂含量，浸没沉淀法制备海绵状结构的支撑膜，并在支撑膜上界面聚合制备聚酰胺反渗透复合膜。分别对支撑膜及反渗透复合膜的结构和性能进行表征，考察聚砜浓度对支撑膜结构和性能的影响，以及不同结构支撑膜对反渗透复合膜结构和性能的影响。结果显示，随着聚砜浓度的增加，支撑膜表面孔径和孔隙率下降，断面结构变致密，耐压性增强。在不同支撑膜上制备的反渗透复合膜具有不同的通量和脱盐率。综合考虑支撑膜及反渗透复合膜的性能，以聚砜浓度为15%制备的海绵状结构支撑膜更适于作为制备反渗透复合膜的支撑层。
통과조절주막액중취풍농도화비용제함량，침몰침정법제비해면상결구적지탱막，병재지탱막상계면취합제비취선알반삼투복합막。분별대지탱막급반삼투복합막적결구화성능진행표정，고찰취풍농도대지탱막결구화성능적영향，이급불동결구지탱막대반삼투복합막결구화성능적영향。결과현시，수착취풍농도적증가，지탱막표면공경화공극솔하강，단면결구변치밀，내압성증강。재불동지탱막상제비적반삼투복합막구유불동적통량화탈염솔。종합고필지탱막급반삼투복합막적성능，이취풍농도위15%제비적해면상결구지탱막경괄우작위제비반삼투복합막적지탱층。
A series of sponge-like polysulfone substrates were fabricated by adjusting the content of PSf and water in the casting solutions. Then, the polyamide reverse osmosis composite membranes were preparedvia interfacial polymerization between m-phenylenediamine and trimethyl chloride over the polysulfone substrates. The resulting substrates and reverse osmosis membranes were characterized to investigate the influence of the polysulfone concentration on the substrates properties and the effect of the substrates properties on the polyamide reverse osmosis membranes. The results showed that with increasing PSf concentration, the average surface pore size and porosity of the substrates decreased, and the resistance ability to compaction enhanced. Besides, the reverse osmosis composite membranes prepared by using different PSf substrates showed different flux and salt rejection. Considering the properties of the substrates and the polyamide reverse osmosis composite membranes, sponge-like substrate by using 15%(mass) polysulfone concentration was suitable for the preparation of reverse osmosis composite membrane.