Browsing by Subject "Nanofibrillated cellulose hydrogel"

Biomimetic native nanofibrillated cellulose (NFC) hydrogel has recently proven its efficacy, safety and diversity at the site of pharmaceutical industry. Yet, properties for the long-term storage in dry condition at room temperature and feasible transportation needs to be developed for NFC hydrogel before it is suitable for freeze-dried biomedical applications. Our aim was to optimize freeze-drying cycle for NFC hydrogel formulation with suitable lyoprotective biomolecules and preserve its properties after freeze-drying process and reconstitution. NFC hydrogel formulations with different combinations of chosen biomolecules were freeze-dried, and physicochemical properties and rheological features were characterized. In addition, morphology of the freeze-dried cakes was studied. The effects of the biomolecules on the water contents in NFC systems were simulated for both of the crystal and amorphous ones. All the results of the characteristics were compared with the non-freeze-dried NFC hydrogel formulations. NFC hydrogel formulation, which had the most optimal preservation properties after freeze-drying and reconstitution, was optimized. We hypothesized that without any chemical modifications native NFC hydrogel can be successfully freeze-dried and subsequently reconstituted with the proper biomolecules only by using biological and natural materials, which are human and xenon-free for the further use in biomedical applications of the native NFC hydrogel.