Epoxidation and etherification of alkaline lignin to prepare water-soluble derivatives and its performance in improvement of enzymatic hydrolysis efficiency

Table 1 Reaction conditions, mass-average (Mw) and number-average (Mn) molecular weights of products, and the content of PEG

Sample^a	Reaction conditions		Molecular weight^b			Content of PEG (%)
Sample^a	Temperature (°C)	Catalyst (g)	Mn (g/mol)	Mw (g/mol)	Mw/Mn	Content of PEG (%)
LP600_0.8	130	0.8	770 ± 7	900 ± 7	1.16	63.0
LP600_1.0	130	1.0	800 ± 14	930 ± 20	1.15	65.0
LP600_1.2	130	1.2	780 ± 14	900 ± 7	1.14	67.0
LP1000₁₃₀	130	1.2	890 ± 14	1290 ± 28	1.43	68.0
LP1000₁₄₀	140	1.2	770 ± 7	890 ± 14	1.16	70.0

^aLP600_0.8, LP600_1.0, and LP600_1.2 represent the products obtained from the reaction between LERM and PEG600 at 130 °C using 0.8, 1.0, and 1.2 g catalyst, respectively; LP1000₁₃₀ and LP1000₁₄₀ represent the products obtained from the reaction between LERM and PEG1000 at 130 and 140 °C using 1.2 g catalyst, respectively
^bData represented are mean values and standard deviations of the results obtained from the duplicated determination

ISSN: 2731-3654