Polyamide membranes with nanoscale Turing structures for water purification

American Association for the Advancement of Science (AAAS) - Tập 360 Số 6388 - Trang 518-521 - 2018
Zhe Tan1, Shengfu Chen1, Xinsheng Peng2, Lin Zhang1, Congjie Gao1,3
1Key Laboratory of Biomass Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China
2School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
3National Engineering Research Center for Liquid Separation Membrane, Hangzhou 310012, China

Tóm tắt

Turing structures at the nanoscale Turing structures arise when imbalances in diffusion rates make a stable steady-state system sensitive to small heterogeneous perturbations. For example, Turing patterns occur in chemical reactions when a fast-moving inhibitor controls the motion of a slower-moving activator. Tan et al. grew polyamide membranes by using interfacial polymerization, where the reactions occur at the interface between oil and water layers. The addition of polyvinyl alcohol to the aqueous phase reduced the diffusion of the monomer. This process generates membranes with more bumps, voids, and islands, which prove to be better for water desalination. Science , this issue p. 518

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American Association for the Advancement of Science (AAAS)

Tập 360 Số 6388

518-521

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