Assessment of the interaction mechanisms for a novel ternary deep eutectic solvent developed to enhance the enzymatic hydrolysis of bamboo

Abstract

A novel ternary deep eutectic solvent (TDES) composed of glycine hydrochloride, ethylene glycol, and p-toluenesulfonic acid was synthesized. The prepared TDES exhibited highly efficient capacity for the pretreatment of bamboo biomass (Phyllostachys edulis). About 95 % of xylan and 89 % of lignin could be removed from the bamboo feedstock after being pretreated with the TDES at 100 °C for 1 h. In addition, a nearly complete glucose yield of 98.7 % could be achieved, which was 9.4 times higher than that of the untreated bamboo. The pH value of the TDES is an important factor affecting the bond cleavage between lignin and carbohydrates. Additionally, the polarity facilitates selective dissolution of lignin via hydrogen bonding. Molecular dynamics simulations reveal an increase in hydrogen bond formation between TDES and lignin model compounds. The findings establish the TDES as a green, efficient method for bamboo biomass pretreatment, facilitating the conversion of this biomass resource into glucose for bioenergy applications.

Citation

Meng, Fanyang; Eberhardt, Thomas L.; Li, Yaru; Xu, Chen; Pan, Hui. 2025. Assessment of the interaction mechanisms for a novel ternary deep eutectic solvent developed to enhance the enzymatic hydrolysis of bamboo. Bioresource Technology. 433: 132737. 11 p. https://doi.org/10.1016/j.biortech.2025.132737.