4.7 Article

Controlling interlayer spacing and organic solvent permeation in laminar graphene oxide membranes modified with crosslinker

期刊

出版社

ELSEVIER
DOI: 10.1016/j.seppur.2021.119279

关键词

Laminar membrane; Graphene oxide; Organic solvent nanofiltration; Crosslinker; Interlayer spacing; Solvent permeation

资金

  1. JSPS KAKENHI [19K05121]
  2. New Energy and Industrial Technology Development Organization (NEDO)
  3. Grants-in-Aid for Scientific Research [19K05121] Funding Source: KAKEN

向作者/读者索取更多资源

Two-dimensional (2D) laminar membranes are being studied for organic solvent nanofiltration, but controlling interlayer spacing and stable solvent permeation remain challenges. In this study, GO membranes with TEOA crosslinker were found to effectively suppress swelling and the affinity between TEOA and solvents correlated with interlayer spacing, indicating the importance of crosslinker-solvent affinity in controlling membrane performance.
Two-dimensional (2D) laminar membranes are attracting much attention in organic solvent nanofiltration owing to the promising permeation and selective performance derived from their 2D ultrathin separation layer. However, owing to easy swelling (enlargement of interlayer spacing), controlling the interlayer spacing in organic solvents and stable solvent permeation are major issues for their application to organic solvent systems. In this study, laminar GO membranes were fabricated on a porous polyketone (PK) support membrane using triethanolamine (TEOA) as crosslinker (GO-TEOA/PK). The interlayer spacing (d) between GO sheets was characterized by X-ray diffraction. The TEOA crosslinker effectively suppressed swelling of the GO laminar structure. For GO-TEOA/PK, the variation in d corresponded well with the affinity between TEOA and each solvent, Ra(TEOA-solvent), as estimated using the Hansen solubility parameters. Furthermore, common linear correlation between the permeance of alcohols and the parameter combining affinity, viscosity, and equivalent molar diameter was clearly observed. Therefore, the affinity between crosslinker and solvent was an important factor in controlling interlayer spacing and solvent permeation in the laminar GO membranes containing crosslinker.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据