Camphorwasencapsulatedintothepolymer-blendatcamphor to polymer weight ratios of 1:1 and 2:1. For each composition, 80mg of the polymer-blend were dissolved in 20mL of 75% (v/v) aqueous ethanol at 70◦C. Then the desired amount of camphor (80 and 160mg) was added to the cool solution and the mixture was placed into a dialysis bag and dialyzed against distilled water (5×500mL) in a tightly closed container with no void volume between the dialysate and the lid.