Abstract
Hollow tubing and tubular filaments are highly relevant to membrane technologies, vascular tissue engineering, and others. In this context, we introduce hollow filaments (HF) produced through coaxial dry–jet wet spinning of cellulose dissolved in an ionic liquid ([emim][OAc]). The HF, developed upon regeneration in water (23 °C), displays superior mechanical performance (168 MPa stiffness and 60% stretchability) compared to biobased counterparts, such as those based on collagen. The results are rationalized by the effects of crystallinity, polymer orientation, and other factors associated with rheology, thermal stability, and dynamic vapor sorption. The tensile strength and strain of the HF (dry and wet) are enhanced by drying and wetting cycles (water vapor sorption and desorption experiments). Overall, we unveil the role of water molecules in the wet performance of HF produced by cellulose regeneration from [emim][OAc], which offers a basis for selecting suitable applications.
| Original language | English |
|---|---|
| Pages (from-to) | 282–289 |
| Number of pages | 8 |
| Journal | Biomacromolecules |
| Volume | 25 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 8 Jan 2024 |
| MoE publication type | A1 Journal article-refereed |
Funding
S.Z. acknowledges the contribution of the Academy of Finland’s Flagship Program under Project Nos. 318890 and 318891 (Competence Center for Materials Bioeconomy, FinnCERES, CleanCell). S.Z., G.R., and O.J.R. are grateful for the support received from the ERC Advanced Grant Agreement No. 788489 (“BioElCell”) and The Canada Excellence Research Chair initiative (CERC-2018-00006), as well as Canada Foundation for Innovation (Project Number 38623).
Keywords
- Cellulose
- Ionic Liquids
- Tensile Strength
- Collagen
- Rheology