TY - JOUR
T1 - On the influence of imidazolium ionic liquids on cellulose derived polymers
AU - Paiva, Tiago
AU - Echeverria, Coro
AU - Godinho, Maria H.
AU - Almeida, Pedro L.
AU - Corvo, Marta C.
N1 - info:eu-repo/grantAgreement/FCT/5876/147333/PT#
PTDC/EPH-PAT/0224/2014.
PTDC/FIS-NAN/0117/2014. PTDC/QUI-QFI/31508/2017.
POR Lisboa and PTNMR 22161.
SFRH/BD/133447/2017.
POCI-01-0145-FEDER-007688.
IJCI-2015-26432 from MINECO - Ministry of Economy, Industry and Competitiveness, Spain.
Sem PDF conforme despacho.
PY - 2019/5/1
Y1 - 2019/5/1
N2 - The demand for better cellulose solvents has driven the search for new and improved materials to enable the processing of this polysaccharide. Ionic liquids have been debated for a long time as interesting alternatives, but the molecular details on the solubilization mechanism have been a matter of controversy. Herein, for the first time, the structure and dynamics of hydroxypropylcellulose (HPC) liquid crystal solutions were probed in the presence of imidazolium ionic liquids (ILs), conjugating rheological measurements with magnetic resonance spectroscopy. This study provides a characterization of the solutions macroscopic behaviour, where the liquid crystalline (LC) properties were maintained. Using ILs with different side chain lengths, the influence of the hydrophobic IL domain in the solvation abilities of ILs towards a cellulose derived polymer was accessed, providing experimental evidence on these interactions.
AB - The demand for better cellulose solvents has driven the search for new and improved materials to enable the processing of this polysaccharide. Ionic liquids have been debated for a long time as interesting alternatives, but the molecular details on the solubilization mechanism have been a matter of controversy. Herein, for the first time, the structure and dynamics of hydroxypropylcellulose (HPC) liquid crystal solutions were probed in the presence of imidazolium ionic liquids (ILs), conjugating rheological measurements with magnetic resonance spectroscopy. This study provides a characterization of the solutions macroscopic behaviour, where the liquid crystalline (LC) properties were maintained. Using ILs with different side chain lengths, the influence of the hydrophobic IL domain in the solvation abilities of ILs towards a cellulose derived polymer was accessed, providing experimental evidence on these interactions.
KW - High resolution magic angle spinning
KW - Hydroxypropylcellulose
KW - Ionic liquids
KW - Molecular interactions
KW - Rheo-NMR
KW - Rheology
UR - http://www.scopus.com/inward/record.url?scp=85062440100&partnerID=8YFLogxK
U2 - 10.1016/j.eurpolymj.2019.02.032
DO - 10.1016/j.eurpolymj.2019.02.032
M3 - Article
AN - SCOPUS:85062440100
VL - 114
SP - 353
EP - 360
JO - European Polymer Journal
JF - European Polymer Journal
SN - 0014-3057
ER -