Abstract:

The activation energy of softwood pulp with a higher degree of polymerization（DP=1460）in 1-butyl-3-methylimidazolium chloride（[BMIM]Cl）solvent was studied，and the effects of such factors as temperature，cellulose concentration，additives of mesoporous silica on the apparent viscosity were discussed. The investigations suggested that the activation energy of cellulose/ [BMIM]Cl system was 50.8 kJ/mol，and the concentration of cellulose had an obvious effect on the apparent viscosity of cellulose/ [BMIM]Cl system. The cellulose-based films prepared at 363.0—368.0 K had better mechanical properties. The addition of mesoporous silica SBA-15 increased the viscosity of cellulose/ [BMIM]Cl system，with a maximum at the addition of 1.5% SBA-15.