Regenerated cellulose membranes (RCMs) were prepared from cellulose
sufficiently dissolved in [TMGH]2+[OOCOCH2CH2OCOO]2–/DMSO (XILS = 0.2, XILs is the mole fraction of reversible ionic
liquids in the mixed solvents) mixed solution under mild conditions
(50 °C, 3 h, PCO2 = 0.2
MPa) using different coagulation baths of ethanol, methanol, NaOH,
and H2SO4 aqueous solutions. The structure and
properties of these membranes were characterized using various characteristic
technologies. The membrane regenerated from ethanol exhibited good
thermostability and mechanical, water vapor, and oxygen barrier properties
with a tensile strength of 56.2 MPa, a tensile strain of 20.4%, an
excellent water vapor permeability of 8.7 × 10–3 g μm/m2 day kPa, and an oxygen permeability (OP)
of 4.087 cm3 μm/m2 day atm. The membranes
regenerated from aqueous solutions of alkali and acid have an OP that
tends to zero. This study provides a novel dissolving strategy to
prepare cellulose membranes that have potential applications in the
packaging, food, and agricultural industries.