胺基化氧化石墨烯复合纳滤膜对染料的截留性能研究  

Study on the Rejection Performance of Aminated-Graphene Oxide Composite Nanofiltration Membranes on Dyes

作　　者：王小娟[1] 王清雯 高学理[1] 王剑[1] 王新艳 高从堦[1] 

机构地区：[1]中国海洋大学,海洋化学理论与工程技术教育部重点实验室,山东青岛266100 [2]山东招远第一中学,山东招远265400 [3]山东招金膜天有限责任公司,山东招远265400

出　　处：《水处理技术》2017年第1期31-35,共5页Technology of Water Treatment

基　　金：国家自然科学基金(21576250);国家科技支撑计划(2015BAE06B03,2014BAK13B02);山东省“泰山学者”建设工程专项

摘　　要：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,N-dimethyl ethylenediamine was used to make a positively charged modification on graphene oxide （GO） synthesized using Hummers method, and the modified GO （AGO） was characterized by fourier transform infrared spectrum （FT-IR）, X-ray diffractometer （XRD） and X-ray photoelectron spectroscopy （XPS）. Then GO and AGO composite nanofiltration （NF） membranes were prepared using pressure-driven self-assembly method and the polysulfone ultrafiltration membrane was used as the base membrane. The cationic dye （methylene blue） and anionic dye （methyl orange）were used as model dyes to investigate the removing effects of GO and AGO NF membranes on different dyes. Results showed that GO was modified with N,N-dimethyl ethylenediamine successfully. The permeate flux of AGO NF membrane was higher than that of the GO NF membrane. Under the same operating pressure, the removal rate of methylene blue using AGO NF membrane was significantly higher than that of GO NF membrane, while the removal rate of methyl orange was on the opposite side. The results proved that N,N-dimethyl ethylenediamine was used to enhance positive charges of GO surface successfully.

关 键 词：氧化石墨烯 复合纳滤膜 N N-二甲基乙二胺 阳离子染料 阴离子染料 脱色 

分 类 号：TQ028.8[化学工程]