Turbostratic nanoporous carbon sheet membrane for ultrafast and selective nanofiltration in viscous green solvents,Journal of Materials Chemistry A

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Turbostratic nanoporous carbon sheet membrane for ultrafast and selective nanofiltration in viscous green solvents
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2020-03-25 , DOI: 10.1039/d0ta00804d
Jaedong Jang _{1,

2,

3,

4,

5} , Yoon Tae Nam _{1,

2,

3,

4,

5} , Daeok Kim _{6,

7,

8,

9} , Yong-Jae Kim _{1,

2,

3,

4,

5} , Dae Woo Kim _{10,

11,

12,

13} , Hee-Tae Jung _{1,

2,

3,

4,

5}

Affiliation

Development of ultrafast and selective nanofiltration membranes for viscous green solvents, such as isopropyl alcohol (IPA), is a big challenge in the chemical, food, and pharmaceutical industries. However, all existing nanofiltration membranes, including polymers, have been critically limited by low solvent permeance and low selectivity for solute molecules with a nanoscale feature dimension. This might be attributed to narrow channel structures and strong interaction between membrane materials and viscous green solvents. Herein, we significantly enhanced the nanofiltration performance in IPA by using a turbostratic nanoporous carbon sheet membrane, which was prepared by rapid thermal treatment of graphene oxide. Sharp separation of viscous alcohol and molecules smaller than 600 Da from larger molecules (molecular weight cut-off: 600 Da) was achieved by using the developed membrane with an ultrafast IPA permeance of ∼1800 L m⁻² h⁻¹ bar⁻¹ (LMH bar⁻¹). The membrane performance far exceeds the upper bound of existing nanofiltration membranes, as reflected by the IPA permeance being two orders of magnitude greater than those for commercially available membranes, sustaining high rejection rates for sub-nanometer size molecules.

中文翻译：

Turbostratic纳米多孔碳片膜可在粘性绿色溶剂中进行超快速和选择性的纳滤

开发用于粘性绿色溶剂（如异丙醇（IPA））的超快和选择性纳滤膜是化学，食品和制药行业的一大挑战。然而，所有现有的纳滤膜，包括聚合物，都受到低溶剂渗透性和对具有纳米级特征尺寸的溶质分子的低选择性的严格限制。这可能归因于狭窄的通道结构以及膜材料与粘性绿色溶剂之间的强相互作用。在这里，我们通过使用快速氧化石墨烯制备的涡轮层状纳米多孔碳片膜大大提高了IPA中的纳滤性能。粘性醇和小于600 Da的分子与较大的分子快速分离（分子量截断：^-2 h^-1 bar^-1（LMH bar^-1）。膜的性能远远超过了现有的纳滤膜的上限，这是因为IPA渗透率比市售膜大两个数量级，从而对亚纳米尺寸的分子保持了很高的排斥率。

更新日期：2020-03-25

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