正渗透膜材料与驱动体系的研究

摘要

报道课题组在正渗透膜材料及高效易回收驱动液方面的研究进展.在膜材料方面,我们研究了准双皮层的三乙酸纤维素正渗透膜,得到的膜性能优于商业化HTI正渗透膜.在驱动溶质方面,研究了以乙二胺四乙酸和树枝状聚合物以及具有响应性能的纳米材料为代表的大尺寸驱动体系,验证了大分子驱动溶质可以有效降低内浓差极化.研究结果表明,膜与驱动液在正渗透研究中都非常重要.%The recent progress in the forward osmosis membrane and drawing agents is reported. A quasi double-skin CTA FO membrane was prepared, which showed improved FO performance superior to commercial HTI membrane. About the draw agents, we have investigated the bulky draw solutes. It appeared that bulky draw solutes, including ethylene diamine tetra-acetic acid (EDTA), dendrimers and stimuli-responsive nanoparticles, showed improved draw efficiency, which confirmed that bulky molecules can effectively reduce internal concentration polarization. The results indicate that both FO membrane and draw agent are important for the improvement in the FO processes.