• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国卫生研究院文献>Polymers >Functionalized Graphene Oxide Modified Polyethersulfone Membranes for Low-Pressure Anionic Dye/Salt Fractionation
【2h】

Functionalized Graphene Oxide Modified Polyethersulfone Membranes for Low-Pressure Anionic Dye/Salt Fractionation

机译：用于低压阴离子染料/盐分馏的功能化氧化石墨烯改性的聚醚砜膜

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，如果获取不到我们将提供退款服务。请知悉。
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In this study, polyelectrolyte assembled functionalized graphene oxide (PE-GO) membranes were fabricated through a one-step charge facilitated deposition method for high performance dye/salt separation. According to the intercalation of polydopamine (PDA) and (ionic liquid) IL functional moieties into the GO membranes, the pore size of the resulted PE-pGO and PE-iGO membrane increased from 2.69 nm to 4.13 nm and 6.54 nm, respectively. Correspondingly, a pure water flux of 13.8 ± 2.2, 36.7 ± 3.4, and 52.1 ± 6.7 L m−1 h−1 bar−1 was achieved for PE-GO, PE-pGO and PE-iGO membrane, respectively. PE-iGO membrane with the largest pore size could be operated with significant water permeability (28.3 to 38.3 L m−1 h−1 bar−1) at a low operating pressure range of 0.5–2 bar (dye concentration = 100 ppm, salt concentration = 5 g/L). More importantly, functionalities introduced to the GO nanosheets are found to impact the dye adsorption to the membrane surface. The IL intercalation promotes the elution of dye molecules from the IL moieties at elevated pH, therefore enhancing the efficiency of alkaline washing of the membrane. By contrast, the intercalation of PDA weakens such efficiency due to its strong adhesion force to the dye molecules even at the alkaline condition.
机译：在这项研究中，聚电解质组装的功能化氧化石墨烯（PE-GO）膜是通过一步电荷促进沉积方法制备的，用于高效的染料/盐分离。根据聚多巴胺（PDA）和（离子液体）IL功能部分插入GO膜中，所得PE-pGO和PE-iGO膜的孔径分别从2.69 nm增加到4.13 nm和6.54 nm。相应地，纯水通量为13.8±2.2、36.7±3.4和52.1±6.7 L m -1 h -1 bar -1 PE-GO，PE-pGO和PE-iGO膜分别达到孔径最大的PE-iGO膜可以在显着的水渗透性下运行（28.3至38.3 L m -1 h -1 bar -1 ）在0.5–2 bar的低工作压力范围内（染料浓度= 100 ppm，盐浓度= 5 g / L）。更重要的是，发现引入GO纳米片的功能会影响染料吸附到膜表面。 IL插层促进在升高的pH下从IL部分洗脱染料分子，因此提高了膜的碱性洗涤效率。相比之下，PDA的插入由于其即使在碱性条件下对染料分子的强粘附力也削弱了这种效率。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号