Table 1. Summarized Roughness Parameters of Prepared Curcumin-Loaded Membranes.

	roughness parameter
sample name	Ra (nm)	Rq (nm)	Rz (nm)
PCl/Cur	1.892	2.376	17.823
PCl/CS/Cur	5.400	6.644	43.126
PCl/CS/Cur/Clay-1	5.015	6.143	38.330
PCl/CS/Cur/Clay-2	2.602	3.675	28.878
PCl/CS/Cur/Clay-3	2.233	2.849	21.496
PCl/CS/Cur/Clay-4	3.661	4.672	32.076