Figure 2. FTIR spectra of PDMS, PDMS−UVO, and PDMS−UVO−F membranes. (a) Comparisons of PDMS(i), PDMS−UVO(ii), and PDMS− UVO−F(iii) membranes. (b) Changes in the CH3 (1446, 1412, 1258, and 800 cm−1) and Si−O−Si (930 and 1200 cm−1) on the surface of PDMS membranes. (c) Changes in the OH (around 3300 cm−1) and CH3 (2906 cm−1) on the surface of PDMS.