Tekay, EmreAybakan, BetulAslan, Vahap Uygar2026-04-042026-04-0420252452-2139https://doi.org/10.1016/j.coco.2025.102378https://hdl.handle.net/11616/109672In this work, novel light-responsive nanocomposites were developed by incorporating varying amounts (1-3-5 phr) of titanium nitride nanoparticles (TiN-NP) into a ternary polymer blend consisting of 30 wt% of maleic anhydride grafted SEBS (SEBS-MA), 40 wt% of ethylene vinyl acetate copolymer (EVA), and 30 wt% of butyl methacrylate/isobutyl methacrylate copolymer (PBMA-PiBMA), that exhibits thermally induced triple-shape memory properties. In the nanocomposite containing 1 phr TiN nanoparticles (1-TiN), a core-shell morphology was observed, with the fillers selectively localizing within the SEBS-MA phase. The presence of TiN filler did not have a significant effect on the thermal transition temperatures of the polymer components. An increase in TiN content resulted in enhanced elastic modulus values for the composites, with a notable 138 % rise observed in the composite that included 5 phr filler relative to the blend. The best heat responsive shape memory performance was observed in the 1-TiN composite, with the first and second shape fixation ratios of 91.6 % and 83.4 %, respectively, and the first and second shape recovery ratios of 90.8 % and 100 %, respectively. The 1-TiN composite underwent photothermal heating under 808 nm NIR light, reaching 40 degrees C and 80 degrees C at light intensities of 48 mW/cm2 and 158 mW/cm2, respectively, demonstrating light-responsive triple-shape memory effect. The filament of the same nanocomposite was produced, and 4D-printed objects were created using an FDM-type 3D printer for various applications. Moreover, the 4D-printed objects fabricated using the nanocomposite filament exhibit triple-shape recovery under NIR light with an intensity of 48 mW/cm2 and 161 mW/cm2.eninfo:eu-repo/semantics/closedAccessShape memoryNanocomposite4D printingLight-responsiveArticle5610.1016/j.coco.2025.1023782-s2.0-105002329082N/AWOS:001471613700001Q1