Sustainable Esterification of a Soda Lignin with Phloretic Acid.

ABSTRACT: In this work, a sustainable chemical process was developed through the Fischer esterification of Protobind® lignin, a wheat straw soda lignin, and phloretic acid, a naturally occurring phenolic acid. It aimed at increasing the reactivity of lignin by enhancing the number of unsubstituted phenolic groups via a green and solvent-free chemical pathway. The structural features of the technical and esterified lignins were characterized by complementary spectroscopic techniques, including 1H, 13C, 31P, and two-dimensional analysis. A substantial increase in p-hydroxyphenyl units was measured (+64%, corresponding to an increase of +1.3 mmol g-1). A full factorial design of the experiment was employed to quantify the impact of critical variables on the conversion yield. The subsequent statistical

SUBMITTER: Adjaoud A 

PROVIDER: S-EPMC7924587 | biostudies-literature | 2021 Feb

REPOSITORIES: biostudies-literature