Open AccessFlexible PBAT-Based Composite Filaments for Tunable FDM 3D Printing
Author(s) -
Corrado Sciancalepore,
Elena Togliatti,
Marina Marozzi,
Federica Rizzi,
Diego Pugliese,
Antonella Cavazza,
Olimpia Pitirollo,
Maria Grazia Grimaldi,
Daniel Milanese
Publication year - 2022
Publication title -
acs applied bio materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.764
H-Index - 17
ISSN - 2576-6422
DOI - 10.1021/acsabm.2c00203
Subject(s) - materials science , composite material , composite number , polymer , polyester
Biobased composites with peculiar properties offer an attractive route for producing environmentally friendly materials. The reinforcement for poly(butylene adipate- co -terephthalate) (PBAT), based on zein-titanium dioxide (TiO 2 ) complex (ZTC) microparticles, is presented and used to produce composite filaments, successfully 3-dimensionally (3D) printed by fused deposition modeling (FDM). The outcome of ZTC addition, ranging from 5 to 40 wt %, on the thermo-mechanical properties of composite materials was analyzed. Results reveal that storage modulus increased with increasing the ZTC content, leading to a slight increase in the glass transition temperature. The creep compliance varies with the ZTC concentration, denoting a better resistance to deformation under constant stress conditions for composites with higher complex content. Scanning electron microscopy was used to assess the quality of interphase adhesion between PBAT and ZTC, showing good dispersion and distribution of complex microparticles in the polymer matrix. Infrared spectroscopy confirmed the formation of a valid interface due to the formation of hydrogen bonds between filler and polymer matrix. Preliminary tests on the biocompatibility of these materials were also performed, showing no cytotoxic effects on cell viability. Finally, the 3D printability of biobased composites was demonstrated by realizing complex structures with a commercial FDM printer.