Dissolution and Hydrolysis of Wood Particles in Glyoxylic Acid without Ball Milling

Abstract

Wiley-milled Eucalyptus globulus wood was dissolved in glyoxylic acid monohydrate through microwave heating at 130 °C for 1 h. Upon heating at 110 °C for 1 h, approximately 96% of the wood was dissolved. Based on the viscosity and SEC measurements of the solution, cellulose hydrolysis appeared to have progressed by heating with glyoxylic acid. The fractionation of the wood solution using 2-MeTHF and water yielded lignin-rich components and depolymerized cellulose. The facile dissolution of wood without high-energy-consuming ball milling would contribute to the effective utilization of wood constituents for biorefinery applications.

Lignin as a green and multifunctional alternative to phenol for resin synthesis

“…[142][143][144] Due to the complex chemical structure of lignin, including the dense three-dimensional network aromatic ring structure and diverse chemical bond combinations, coupled with the role of intermolecular hydrogen bonds, it is difficult to achieve lignin depolymerization by traditional physical methods (mechanical processing and ultrasonic processing). [145][146][147][148] As a result, thermochemical, chemical, and biochemical depolymerization are primarily involved (Fig. 5).…”