Reaction Behavior of Cellulose in the Homogeneous Esterification of Bagasse Modified with Phthalic Anhydride in Ionic Liquid 1-Allyl-3-methylimidazium Chloride

Table 1

The substituted hydroxyl contents and phthalation degrees of the phthalated cellulose and bagasse.

Sample no.	Temp. (C)	PA dosage (mmol/g)	Solvent	Time (h)	THC (mmol/g)	SHC (mmol/g)	PD (%)
C1	90	10	AmimCl	1.5	18.52	2.15	11.61
C2	90	20	AmimCl	1.5	18.52	2.61	14.09
C3	90	30	AmimCl	1.5	18.52	3.71	20.03
C4	90	40	AmimCl	1.5	18.52	5.51	29.75
C5	90	50	AmimCl	1.5	18.52	8.17	44.11
S1	90	10	AmimCl	1.5	14.31	0.81	5.66
S2	90	20	AmimCl	1.5	14.31	1.47	10.27
S3	90	30	AmimCl	1.5	14.31	1.94	13.56
S4	90	40	AmimCl	1.5	14.31	2.92	20.41
S5	90	50	AmimCl	1.5	14.31	3.25	22.71

The ratio of phthalic anhydride (mmol) to biomass material (g, bagasse or cellulose).
Theoretical hydroxyls content of unmodified biomass material.
Substituted hydroxyl contents determined by back titration.
Phthalation degree.