The effect of drying method on the porosity of regenerated cellulose fibres

Autor:	Nolene Byrne, Beini Zeng
Rok vydání:	2021
Předmět:	chemistry.chemical_compound Materials science Polymers and Plastics chemistry Chemical engineering Nanoporous Supercritical drying Regenerated cellulose Cellulose Porosity Spinning Dissolution Supercritical fluid
Zdroj:	Cellulose. 28:8333-8342
ISSN:	1572-882X 0969-0239
DOI:	10.1007/s10570-021-04068-2
Popis:	This study investigates the role of drying method and dissolving solvent has on the properties of regenerated cellulose fibres, leading to the preparation of porous cellulose fibres. The fibres are produced by wet spinning using 1-butyl-3-methylimidazolium acetate (BmimAc) as the solvent, and then dried using freeze drying or supercritical drying resulting in highly porous fibres. The properties of these fibres are compared to the traditional air-dried regenerated cellulose fibre. It was found that freeze drying produced fibres with micron pores on the surface and nanopores within the core, whereas supercritical-dried fibres had a smooth surface and a nanoporous core. The addition of DMSO to the spinning dope for supercritical dried fibres reduced the fibre diameter under identical draw conditions and increased the surface area to 260 m2/g.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::bf4da4b24eb8c171e74f2312563f2265 https://doi.org/10.1007/s10570-021-04068-2 Zobrazit plný text záznamu Full text from SpringerLink