@Article{jrm.2026.02025-0194,
AUTHOR = {Alexey E. Shkuro, Artyom V. Artyomov, Victor G. Buryndin, Anna S. Ershova, Tatyana V. Yakubova},
TITLE = {Formation of Binder-Free Composites Based on Natural Materials: Structure, Mechanisms, and Prospects for Chemical Modification},
JOURNAL = {Journal of Renewable Materials},
VOLUME = {},
YEAR = {},
NUMBER = {},
PAGES = {{pages}},
URL = {http://www.techscience.com/jrm/online/detail/27718},
ISSN = {2164-6341},
ABSTRACT = {Binder-free lignocellulosic boards and molded composites are gaining momentum as low-emission alternatives to conventional wood-based panels because they exploit intrinsic self-bonding of biomass under hot pressing. This review critically analyzes structure-formation pathways in binder-free composites, focusing on (i) thermo-mechanical softening and flow of lignin as a natural adhesive phase, (ii) auto-hydrolysis of hemicelluloses generating organic acids and reactive furanic intermediates, and (iii) subsequent condensation and crosslinking reactions that consolidate the network. We compare process routes historically associated with Masonite-type fiber processing and Lignoplast-type direct compaction, highlighting how moisture, temperature, pressure, sealing degree, and particle morphology govern bond development and dimensional stability. Particular attention is paid to chemical activation strategies (oxidants, nitrogen-containing reagents, and reactive bio-based systems) that tune lignin mobility and reactivity, enabling milder pressing and improved water resistance. We outline research gaps linking chemical transformations to macroscopic performance, and propose future directions including <i>in situ</i> monitoring, quantitative structure-property models, and activation chemistries compatible with circular and compostable product concepts.},
DOI = {10.32604/jrm.2026.02025-0194}
}