Cellulose was concurrently hydrolyzed and modified by esterification
forming functionalized CNCs in a one-pot reaction (Fig. 1).
This green in situ hydrolysis/esterification process was performed
without solvent exchanges. Instead, cottonwas suspended in a dual
acid system consisting of HCl and an organic acid and then reacted
for 3 h at 150 C. The surface of CNCs was modified with acetate
(AA) or lactate (LA) groups to explore whether such modifications
would increase interactions between the esterified CNCs and PLA
during melt blending. For comparison, non-esterified CNCs were
prepared by HCl hydrolysis without adding an organic acid. The
possibility that, in addition to lactate esters, lactate oligomers are
also esterified to CNCs is shown in Fig. 1. The formation of acetate
and lactate modified CNCs (AA-CNCs and LA-CNCs, respectively),
was investigated by FTIR.
Cellulose was concurrently hydrolyzed and modified by esterificationforming functionalized CNCs in a one-pot reaction (Fig. 1).This green in situ hydrolysis/esterification process was performedwithout solvent exchanges. Instead, cottonwas suspended in a dualacid system consisting of HCl and an organic acid and then reactedfor 3 h at 150 C. The surface of CNCs was modified with acetate(AA) or lactate (LA) groups to explore whether such modificationswould increase interactions between the esterified CNCs and PLAduring melt blending. For comparison, non-esterified CNCs wereprepared by HCl hydrolysis without adding an organic acid. Thepossibility that, in addition to lactate esters, lactate oligomers arealso esterified to CNCs is shown in Fig. 1. The formation of acetateand lactate modified CNCs (AA-CNCs and LA-CNCs, respectively),was investigated by FTIR.
การแปล กรุณารอสักครู่..
