XRD patterns of all BC membranes were measured with a
Phillips X’pert MPD diffractometer using Cu Ka radiation. The
crystallinity percentage was measure as c (%) ¼ (ImaxImin)/
Imax 100%, where Imax is the height of the peak at 2q ¼ 22.5
and Imin the minimum between the peak at q ¼ 22.5 and the
peak at 2q ¼ 16.3.