Lignin modification through steam explosion pretreatment: A comparison with direct organosolv pulping.

This study investigates the effects of different delignification processes on oil palm frond (OPF) biomass, focusing on the structural characteristics and antioxidant properties of lignin isolated with organosolv pretreatment and a combined pretreatment of organosolv and steam explosion (SE). Functional groups in organosolv lignin (OL) and steam explosion organosolv lignin (SEOL) were analyzed and compared using multiple complementary analyses such as FTIR spectroscopy, NMR spectroscopy, GPC chromatography, CHN and thermal analyses, lignin antioxidant activity via reducing power assay and dissolution test. The findings reveal that SEOL achieved the highest solid recovery at 11.

An Extensive Study of an Eco-Friendly Fireproofing Process of Lignocellulosic × Particles and Their Application in Flame-Retardant Panels.

Increasing the flame retardancy of lignocellulosic materials such as × can effectively enable their wide use. This study examines the fireproofing process of Miscanthus particles using an eco-friendly process by grafting phytic acid and urea in aqueous solution. Miscanthus particles underwent a steam explosion step before being grafted.

Development and structural comparison of alkaline and organosolv coconut husks lignin as an eco-friendly lignin-phenol-glyoxal (LPG) wood adhesives.

The development of eco-friendly wood adhesives have gained more interest among adhesives industries due to the concerns about using carcinogenic formaldehyde and petroleum-based phenol in commercially available adhesives. Therefore, many studies have been done by using lignin to partially replace phenol and completely substitute formaldehyde with non-toxic glyoxal in a wood adhesive formulation. This study focused on using different percentages of lignin substitution (10 %, 30 % and 50 wt%) of alkaline and organosolv coconut husk lignin into soda lignin-phenol-glyoxal (SLPG), Kraft lignin-phenol-glyoxal (KLPG) and organosolv lignin-phenol-glyoxal (OLPG) adhesives.

Modeling the Production Process of Lignin Nanoparticles Through Anti-Solvent Precipitation for Properties Prediction.

Global warming has recently intensified research interest in renewable polymer chemistry, with significant attention directed towards lignin nanoparticle (LNP) synthesis. Despite progress, LNP industrial application faces challenges: (1) reliance on kraft lignin from declining raw biomass processes, (2) sulfur-rich and condensed lignin use, (3) complex lignin macroparticles to LNP conversion, using harmful and toxic solvents, and, above all, (4) lack of control over the LNP production process (i.e.

Isolation and Structural Characterization of Natural Deep Eutectic Solvent Lignin from Brewer's Spent Grains.

Brewer's spent grains (BSG) offer valuable opportunities for valorization beyond its conventional use as animal feed. Among its components, lignin-a natural polymer with inherent antioxidant properties-holds significant industrial potential. This work investigates the use of microwave-assisted extraction combined with acidic natural deep eutectic solvents (NaDESs) for efficient lignin recovery, evaluating three different NaDES formulations.