Polyurethane-Keratin Membranes: Structural Changes by Isocyanate and pH, and the Repercussion on Cr(VI) Removal

<table class="table-group" width="800px"><tr class="fig-image" id="a"><td><img alt="892547.fig.004a" src="https://static.hindawi.com/articles/ijps/volume-2013/892547/figures/892547.fig.004a.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(a) </b>MPKN </td></tr></table></td></tr><tr class="fig-image" id="b"><td><img alt="892547.fig.004b" src="https://static.hindawi.com/articles/ijps/volume-2013/892547/figures/892547.fig.004b.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(b) </b>MPKAc</td></tr></table></td></tr><tr class="fig-image" id="c"><td><img alt="892547.fig.004c" src="https://static.hindawi.com/articles/ijps/volume-2013/892547/figures/892547.fig.004c.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(c) </b>
								TPKAc</td></tr></table></td></tr></table>

<table>SEM images of PU-keratin membranes after the removal process. </table>

International Journal of Polymer Science

fig4

Figure 4

Figure 4: Polyurethane-Keratin Membranes: Structural Changes by Isocyanate and pH, and the Repercussion on Cr(VI) Removal 