Fabrication of composites using the additive manufacturing method of Digital Light Processing an‎d the mechanical properties assessment

10/22/2026 12:00:00 AM

layer photopolymerization were investigated to enhance their mechanical, thermal, an‎d shape memory properties. For this purpose, bio-based acrylated epoxidized soybean oil was employed as the polymer matrix, along with isobornyl methacrylate as a reactive diluent to adjust viscosity, Irgacure 819 as a photoinitiator to activate the polymerization reaction, an‎d magnetic iron oxide nanoparticles as functional fillers. After preparation an‎d printing of the samples, post-curing under ultraviolet irradiation was performed to complete the polymer network formation an‎d ensure structural uniformity an‎d density stability.To eva‎luate the effect of the filler on the composite behavior, a series of analytical tests including Fourier-transform infrared spectroscopy for identifying functional groups, tensile testing for mechanical properties, dynamic mechanical thermal analysis for viscoelastic characterization, scanning electron microscopy for microstructural observation, an‎d shape memory testing for determining shape recovery were conducted. The results showed that the controlled addition of iron oxide nanoparticles enhanced tensile strength, interfacial adhesion, glass transition temperature, an‎d shape memory performance. However, excessive filler content led to particle agglomeration an‎d deterioration of mechanical properties, indicating the importance of uniform filler dispersion for maintaining structural integrity. Simultaneous analysis of thermal, mechanical, an‎d shape memory results revealed that increased network density an‎d reduced energy dissipation in optimized samples were the main factors responsible for improved shape recovery behavior. Furthermore, it was found that combining bio-based resin with magnetic fillers maintained printability an‎d curing efficiency while enabling composites with favorable thermal an‎d mechanical stability. Microstructural observations also indicated a relatively uniform distribution of nanoparticles an‎d strong polymer phase continuity in the optimized formulations, which contributed to efficient stress transfer an‎d delayed failure initiation. Overall, the findings of this study provide a scientific foundation for developing thermally an‎d magnetically responsive smart materials for future engineering, biomedical, an‎d adaptive system applications.

چاپ نوري لايه‌به‌لايه ديجيتال , كامپوزيت پايه‌پليمري , رزين زيست‌پايه , نانوذرات اكسيد آهن , حافظه‌شكلي

Digital layer-by-layer photopolymerization , Polymer-based composite , Bio-based resin , Iron oxide nanoparticles , Shape memory

Mohammad Ali Yavari

Dr.Ramin Hashemi