Structure and mechanical properties of 3D-printed cellulose tablets by fused deposition modeling
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This paper evaluated corn starch/cellulose acetate (SCA) specimens 3D-printed by the fused deposition modeling (FDM) method. The influence of the printing parameters, nozzle temperature, and flow rate on the morphological and mechanical properties of the specimens was evaluated. Scanning electron microscopy (SEM) showed smooth surfaces on all the 3D-printed specimens. The fracture surface analysis revealed homogeneity and low porosity of the specimens printed at 230 °C and 90% flow rate. The flexural tests showed high values of the flexural modulus for the specimens printed at 240 °C and 80% flow rate, and the fatigue tests demonstrated that the 230-90 SCA specimens were resistant to successive cyclic loads.
KeywordsCorn starch/cellulose acetate 3D printing Structure and mechanical properties
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The authors would like to thank PRONEX-FAPESC, CAPES, and CNPq for the financial support and CERMAT for the electronic micrographics.
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