Figure 5 a lecithin showed a low-intensity endothermic peak at 47.2°C, which was the chain melting transition point where it transformed into a liquid crystalline form from a gel form with enhanced ability to act as a drug carrier (36). Two endotherms were observed for chitosan, where 83.8°C was attributed to water loss and polymeric chain decomposition at 303.7°C (37). PEG 2000 endothermic peaks at 53.5°C, indicating melting process of the sample (36).
Fig. 5 Characterisation of PALN nanoparticles. a DSC thermogram of PALNs, physical mixture, ACV, lecithin, PEG 2000, chitosan; b XRD Diffractogram for PALNs