Tannic Acid/Fe3+ Nanoscaffold for Interfacial Polymerization: Toward Enhanced Nanofiltration Performance | doi.page

0 citations0 references

Tannic Acid/Fe3+ Nanoscaffold for Interfacial Polymerization: Toward Enhanced Nanofiltration Performance

Environmental Science & Technology2018Vol. 52(16), pp. 9341–9349

Citations Over TimeTop 1% of 2018 papers

Zhe Yang, Zhiwen Zhou, Hao Guo, Zhikan Yao, Xiao‐Hua Ma, Xiaoxiao Song, Shien‐Ping Feng, Chuyang Y. Tang

Abstract

Conventional thin-film composite (TFC) membranes suffer from the trade-off relationship between permeability and selectivity, known as the "upper bound". In this work, we report a high performance thin-film composite membrane prepared on a tannic acid (TA)-Fe nanoscaffold (TFC_n) to overcome such upper bound. Specifically, a TA-Fe nanoscaffold was first coated onto a polysulfone substrate, followed by performing an interfacial polymerization reaction between trimesoyl chloride (TMC) and piperazine (PIP). The TA-Fe nanoscaffold enhanced the uptake of amine monomers and provided a platform for their controlled release. The smaller surface pore size of the TA-Fe coated substrate further eliminated the intrusion of polyamide into the substrate pores. The resulting membrane TFC_n showed a water permeability of 19.6 ± 0.5 L m2- h-1 bar-1, which was an order of magnitude higher than that of control TFC membrane (2.2 ± 0.3 L m-2 h-1 bar-1). The formation of a more order polyamide rejection layer also significantly enhanced salt rejection (e.g., NaCl, MgCl₂, Na₂SO₄, and MgSO₄) and divalent to monovalent ion selectivity (e.g., NaCl/MgSO₄). Compared to conventional TFC nanofiltration membranes, the novel TFC_n membrane successfully overcame the longstanding permeability and selectivity trade-off. The current work paves a new avenue for fabricating high performance TFC membranes.

Citations Over TimeTop 1% of 2018 papers

Abstract

Related Papers