论文部分内容阅读
采用N,N-二甲基乙二胺对Hummers法制备的氧化石墨烯(GO)进行荷正电改性,得到胺基化氧化石墨烯(AGO);然后以聚砜超滤膜为基膜,采用压力驱动自组装法分别制备GO和AGO复合纳滤膜,选择阳离子染料亚甲基蓝和阴离子染料甲基橙作为模型染料,考察改性前后GO纳滤膜的纯水渗透通量及其对不同荷电性染料的脱除效果。结果表明,改性后AGO纳滤膜的纯水渗透通量明显高于GO纳滤膜,且相同压力、相同浓度下AGO纳滤膜对亚甲基蓝的脱除率明显高于GO纳滤膜,而对甲基橙的脱除效果与之截然相反,证明N,N-二甲基乙二胺对增强GO表面荷正电性改性成功。
N-dimethylethylenediamine was used to charge the graphene oxide (GO) prepared by Hummers method to obtain the aminated graphene oxide (AGO). Then, the polysulfone ultrafiltration membrane was used as the base membrane , Respectively. GO and AGO composite nanofiltration membranes were prepared by pressure-driven self-assembly method. The cationic dye methylene blue and anionic dye methyl orange were selected as the model dyes. The pure water permeation flux of GO nanofiltration membranes before and after modification was investigated. Electrical dye removal effect. The results showed that the pure water permeation flux of the modified AGO nanofiltration membrane was significantly higher than that of the GO nanofiltration membrane, and the removal rate of methylene blue by AGO nanofiltration membrane was significantly higher than that of GO nanofiltration membrane at the same pressure and concentration On the contrary, the removal effect of methyl orange is proved that the N, N-dimethylethylenediamine is successfully modified on the positive charge of GO surface.