氧化石墨烯改性聚酰胺膜制备及去除水中有机物研究

Polyamide is one of the most commonly used functional separation layer of nanofiltration and reverse osmosis membrane. Considering the shortage of low water flux and easily contaminated property, graphene oxide is introduced into polyamide composite membrane to modify the functional layer structure and interfacial characteristics, realizing the improvement of hydrophilicity and antifouling performance. By optimizing the abundance and distribution of graphene oxide in the polyamide layer, graphene oxide is able to participate in the polyamide interfacial polymerization to achieve the firm embedding of graphene oxide, a cutting-edge method to prepare modified polyamide composite membrane. Figure out the patterns and mechanism of organics removal by membranes before and after the modification, and optimize the modification of modified membranes in turn. This study can provide a new solution to modification of membrane and scientific and technological support to water treatment.

聚酰胺材料是纳滤和反渗透膜常用分离功能层之一，本研究针对聚酰胺复合膜的低水通量、易于被污染的问题，尝试引入氧化石墨烯改性聚酰胺功能层结构和界面特性，实现亲水性和抗污染性能的改善。通过优化氧化石墨烯在聚酰胺层的丰度和分布，调控氧化石墨烯参与聚酰胺界面聚合反应，形成氧化石墨烯的牢固嵌入，建立聚酰胺复合膜的先进改性方法；分析氧化石墨烯改性前后聚酰胺复合膜对有机物去除规律，探究氧化石墨烯改性聚酰胺复合膜除污染机械筛分及吸附和解吸作用机制，反馈优化膜改性方法，为基于聚酰胺复合膜的膜法净水工艺提供科技支撑。

聚酰胺材料是纳滤和反渗透膜常用分离功能层之一，本研究针对聚酰胺复合膜的低水通量、易于被污染的问题，尝试引入氧化石墨烯改性聚酰胺功能层结构和界面特性，实现了亲水性和抗污染性能的改善。通过优化氧化石墨烯在聚酰胺层的丰度和分布，调控氧化石墨烯参与聚酰胺界面聚合反应，形成了氧化石墨烯的牢固嵌入，实现了聚酰胺复合膜的先进改性；当加入的GO浓度为0.004wt%时，改性膜具有最优性能。本研究探究了氧化石墨烯改性聚酰胺复合膜除污染机械筛分及吸附和解吸作用机制，GO的引入提高了复合膜的亲水性，亲水性膜抑制了疏水性污染物在膜上沉积，为基于聚酰胺复合膜的膜法净水工艺提供科技支撑。研究发表了论文8篇，其中SCI 论文7 篇，中文文章1篇。申请专利2项。