Research Information System
Wood Material Science & Engineering, vol.0, pp.1-4, 2026 (SCI-Expanded, Scopus)
The incorporation of lignocellulosic fillers into photopolymer matrices offers a promising route towardmore sustainable additive manufacturing materials. However, their influence on stereolithography(SLA) processing and mechanical performance remains insufficiently understood. This studyinvestigated the printability limits and mechanical behavior of beech wood (Fagus orientalis L.) particle– reinforced photopolymer composites produced via SLA. Beech wood particles were incorporatedinto an acrylate-based resin at 0%, 5%, 10%, and 15% by weight. Increasing wood content alteredresin optical and rheological characteristics, resulting in UV light attenuation, reduced cure depth, andimpaired interlayer adhesion. To compensate for these effects, bottom exposure times were increasedfrom 40 s for the neat resin to 60 s and 70 s for the 5% and 10% formulations, respectively. Althoughspecimens containing 15% wood particles could be fabricated, defects such as incomplete curingand delamination prevented mechanical testing. Tensile and compressive properties decreasedsystematically with increasing wood content due to weak interfacial bonding between hydrophilicwood particles and the hydrophobic photopolymer matrix, as well as microstructural heterogeneities.Among the investigated formulations, the composite containing 5% beech wood particles exhibitedthe most favorable balance between printability and mechanical performance. These results definefiller-content thresholds for wood-filled SLA composites.