Chemical Modification with Alkalinization and Acetylation of Ramie Fibers for Eco-Friendly 3D Printing Filaments: Effects on Crystallinity, Structure, and Hydrophobicity

Rapid prototyping, particularly in 3D printing, has highlighted the potential of ramie fiber as a reinforcing material for filaments.However, ramie's high hydrophilicity limits its compatibility.Chemical treatments such as NaOH alkalization and CH 3 COOH acetylation improve its mechanical and hydrophobic properties.FTIR analysis confirmed successful modifications, showing reduced -OH groups and the formation of carbonyl bands, enhancing hydrophobicity.Delignification reduces lignin while preserving cellulose structure.These modifications improve ramie fiber compatibility with polymer matrices, making it suitable for eco-friendly 3D printing filaments with enhanced mechanical and hydrophobic properties.