Table 1.

Experimental results of hydrogel characterization

Storing temperature (°C)	Characterization at preparation			Characterization after 3 months			Characterization after 6 months
	Size (nm)	PDI	EE (%)	Size (nm)	PDI	EE (%)	Size (nm)	PDI	EE (%)
4	107.07 ± 0.1	0.300 ± 0.015	74.00 ± 0.37	144.32 ± 0.2	0.268 ± 0.081	71.26 ± 0.46	171.73 ± 0.3	0.318 ± 0.076	68.86 ± 0.49
25	107.07 ± 0.1	0.300 ± 00.15	74.00 ± 0.37	127.37 ± 0.3	0.247 ± 0.022	69.73 ± 0.39	150.60 ± 0.2	0.300 ± 0.031	67.51 ± 0.41
40	107.07 ± 0.1	0.300 ± 0.015	74.00 ± 0.37	120.81 ± 0.5	0.368 ± 0.076	59.76 ± 0.61	143.66 ± 0.3	0.479 ± 0.061	51.47 ± 0.38

EE% = entrapment efficiency percentage; PDI = polydispersity index.