Abstract
Bacterial cellulose (BC) has shown potential as a separation material. Herein, the performance of BC in pressure-driven separation is investigated as a function of incubation conditions and post-culture treatment. The pure water flux of never-dried BC (NDBC), was found to be 9 to 16 times higher than that for dried BC (DBC), in a pressure range of 0.25 to 2.5 bar. The difference in pressure response of NDBC and DBC was observed both in cross-flow filtration and capillary flow porometry experiments. DBC and NDBC were permeable to polymers with a hydrodynamic radius of ∼60 nm while protein retention was possible by introducing anionic surface charges on BC. The results of this work are expected to expand the development of BC-based filtration membranes, for instance towards the processing of biological fluids.
| Original language | English |
|---|---|
| Article number | 117073 |
| Journal | Carbohydrate Polymers |
| Volume | 251 |
| Early online date | 16 Sept 2020 |
| DOIs | |
| Publication status | Published - 1 Jan 2021 |
| MoE publication type | A1 Journal article-refereed |
Funding
This work was funded by H2020-ERC-2017-Advanced Grant “BioELCell” (788489). This work was a part of the Academy of Finland's Flagship Programme under Projects No. 318890 and 318891 (Competence Center for Materials Bioeconomy, FinnCERES). LD acknowledges the Australian Research Council (ARC) for his Discovery Early Career Researcher Award (DECRA) 2018 (180100130). OJR is also grateful to the Canada Excellence Research Chair initiative.
Keywords
- bacterial cellulose
- compression
- filter
- nanocellulose
- pure water flux
- separation