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. 2020 Dec 28;13(1):31. doi: 10.3390/pharmaceutics13010031

Figure 6.

Figure 6

Preparation of dry powder for inhalation by supercritical fluid drying. (I) Chemical substance phase diagram (C: critical point) Reproduced with permission from [132], Elsevier, 2015; (II) schematic diagram of rapid expansion of supercritical fluid (RESF)-CO2 technique; (III) SEM images of some supercritical fluid (SF)-dried products (A) fluticasone with 5% lecithin Reproduced with permission from [139], Elsevier, 1998, (B,C) CHT and CHT-IBP microparticles Reproduced with permission from [141], Elsevier, 2016.