Dear colleagues,
We are having trouble drying nanocrystalline cellulose as oven drying is not recommended as it results in major aggregation of fibers. Does anybody know any alternative to spray- or freeze-drying?
Thank you
Lucca Malucelli
Hi,
You can use drying by ambient air under low pressure, and this to evaporate water at low temperature.
you don't need to put the product inside an oven but in a small conditioned chamber under low pressure and low temperature and by using high air velocity.
Best regards
Dr Hemis
solvent exchange: resuspend in ethanol 70% (twice), then ethanol 96% (twice) then acetone (two - three times), then evaporate the acetone at 40°C in an oven.
The morphological properties of the dried nanocelluloses are dependent on the particular drying method. Different technologies have been developed for drying nanocellulose at lab, pilot and large scale production. Drying is removal of a liquid from solid/semisolid/suspension nanocelluloses to produce solid product by thermal energy input causing phase change. Depend on the size of your material as well as what you are looking for (morphology, re-dispersion); you may select a right method for it. If any further inquiries, please feel free to communicate.
Hope this will help
- Badges
- Science method