(a)
(b)
(c)
(d)
(e)
(f)
(g)
(h)
(i)
(j)
Figure 8: Scanning electron microscope (SEM) images of CHF: (a, b) raw and treated fibers, (c, d) 1% NaOH, (e, f) 2% NaOH, (g, h) 5% NaOH, and (i, j) 8% NaOH.