AcO	Acetate
AGU	Anhydroglucose unit
Al	Allyl group
AlMeImCl	1-Allyl-3-methylimidazolium chloride
BuMeImCl	1-Butyl-3-methylimidazolium chloride
Bz	Benzyl group
CDI	N,N′-Carbonyldiimidazole
Cel	Cellulose
ChCl	Choline chloride
CMC	Carboxymethyl cellulose
DBN	1,5-Diazabicyclo[[4.3.0]non-5-ene
DBU	1,8-Diazabicyclo[[5.4.0]undec-7-ene
DFT	Density functional theory
DMAc	N,N-Dimethylacetamide
DMF	N,N-Dimethylformamide
DMPh	Dimethylphosphate
DMSO	Dimethyl sulfoxide
DP	Average degree of polymerization
DS	Average degree of substitution
DSC	Differential scanning calorimetry
EtMeImAcO	1-Ethyl-3-methylimidazolium acetate
Fo	Formate group
IL	Ionic liquid
MCC	Microcrystalline cellulose
MD	Molecular dynamics simulations
Me(OEt)	Methoxyethyl
MS	Molecular solvent
NMMO	N-Methylmorpholine N-oxide
NMP	N-Methyl-2-pyrrolidone
NRRRR	Quaternary ammonium ion, R = 1 (methyl), 2 (ethyl), Al (allyl), Bz (benzyl), Me(OEt) (2-methoxyethyl), e.g., N222 Me(OEt)2 = bis(2-methoxyethyl)triethyl ammonium
PHK	Prehydrolysis kraft
PrO	Proprionate group
QACl	Quaternary ammonium chloride
QAF	Quaternary ammonium fluoride
SA	Solvent acidity as determined by solvatochromic probes (also designated as α)
SB	Solvent basicity as determined by solvatochromic probes (also designated as β)
SEC	Size exclusion chromatography
SEM	Scanning electron microscopy
TBA	Tetra-(n-butyl)ammonium
TBAAcO	Tetra-(n-butyl)ammonium acetate
TBACN	Tetra-(n-butyl)ammonium cyanide
TBAF	Tetra-(n-butyl)ammonium fluoride
TBAOH	Tetra-(n-butyl)ammonium hydroxide
TBPOH	Tetra-(n-butyl)phosphonium hydroxide
TMG	Tetramethylguanidine, Tetramethylguanidinium
χ	Mole fraction
W	Mass fraction
ῦ	Wavenumber