Porous Cellulose Beads Fabricated from Regenerated Cellulose as Potential Drug Delivery Carriers

Table 2

Released kinetics parameters for curcumin from CBs in media of different pH values.

Kinetic model	Bead size	Medium pH
		pH = 1.2			pH = 6.4
			()			()
Zero order	S1	0.8134	5.3761		0.9478	7.0722
	S2	0.9561	5.0045		0.9684	5.6761
	S3	0.9722	4.3256		0.9740	5.1764
			()			()
First Oder	S1	0.9769			0.9662
	S2	0.9950			0.9966
	S3	0.9934			0.9979	0.0404
			()			()
Higuchi	S1	0.9274	22.795		0.9958	27.470
	S2	0.9983	20.307		0.9993	22.897
	S3	0.9987	17.410		0.9994	20.823
			()			()
Hixson and Crowell	S1	0.7613			0.8987
	S2	0.9064			0.9098
	S3	0.9159			0.9129
				()			()
Korsmeyer-; Peppas	S1	0.9716	0.31	1.7008	0.9990	0.35	1.6659
	S2	0.9992	0.38	1.4834	0.9988	0.45	1.4205
	S3	0.9989	0.50	1.2331	0.9989	0.51	1.3093