A review on preparing new energy ultrafine powder materials by freeze-drying

Investigating the effects of maltodextrin, gum arabic, and whey protein concentrate on the microencapsulation efficiency and oxidation stability of hemp seed oil

“…In magnification of ×500, the microcapsule indicated an irregular arrangement with elevations and dents and porous structures attributed to the depletion of ice crystals by the sublimation process of freeze‐drying (González‐Ortega et al, 2020; Rezvankhah et al, 2020; Silva et al, 2013). Nevertheless, with the magnification of ×2000, a homogenous layer of biopolymers was observed, which protected the HSO (Mi et al, 2019; Silva et al, 2013). Similar results were reported by González‐Ortega et al (2020) that olive leaf extract was microencapsulated by freeze‐drying using MD and trehalose, alone or mixtures as wall materials.…”

“…Due to applying high temperature during the spray-drying, some coating agents may stick to the drying chamber, and thus, the nutritional value of encapsulated nutraceutical compounds is decreased (Geranpour et al, 2019;Mi et al, 2019;Rezvankhah et al, 2020).…”

Facilitating drying R&D via critical review papers

“…However, designing a controlled delivery system with physiochemical stability to gently release entrapped core in the gastrointestinal tract is the main challenge of encapsulation [7]. Freeze drying has significant advantages in the preparation of high-quality new energy ultrafine powder materials with excellent physical and chemical characteristics [8]. The effect of different types of freeze drying processes has also been reported by Harguindeguy and Fissore (2020) who found that vacuum freeze drying gives the best results for retention of vitamin C [10].…”

“…Here, we will summarize the review articles which appeared during 2019 with brief outlines of their content. As can be surmised from the list of references [3][4][5][6][7][8][9][10][11][12], the review articles cover a broad range of topics that should interest academia as we as industry.…”

Comparison of the Design Space of Products with Different Initial Saturation

“…There have been growing interests in vacuum freeze-drying. [1][2][3] It is mainly composed of three steps 4 : freezing, primary drying and secondary drying. The free water is firstly frozen to form ice crystals in the freezing stage.…”