Skip to main content
. Author manuscript; available in PMC: 2019 Aug 28.
Published in final edited form as: Chem Soc Rev. 2018 Aug 28;47(17):6486–6504. doi: 10.1039/c8cs00187a

Figure 16. Silk-based multilayer filtration system.

Figure 16

The double-layer structure of the SNF/HAP membranes was formed through vacuum filtration of 1 ml of SNF/HAP dispersion. (A) Schematic of double-layer structures. The top layer is the SNF-rich layer with small pore sizes. The bottom layer is the HAP layer with larger pore sizes. (B) Cross-sectional SEM image of a double-layer membrane. (C and D) Top-view SEM images of SNF-rich (C) and HAP-rich (D) layers. (E to G) The multilayer structure of the SNF/HAP membrane was generated from 3-ml SNF/HAP dispersion using a 3.5-cm-diameter mold. (E) Schematic of multilayer structures. (F) Cross section SEM image of a multilayer membrane. (G) High-resolution cross-sectional SEM image of a multilayer membrane. Adapted with permission from ref 50. Copyright 2017 American Association for the Advancement of Science.