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This work examines theoretical and experimental aspects concerning the thermal characteristics of components fabricated via the fused deposition modeling (FDM) technique utilizing conductive ABS and PLA polymers. It use inverse problems to accomplish this. An infrared thermographic camera assessed the temperature and facilitated heat flow between the plates to acquire experimental data. We developed the mathematical model for addressing the direct problem based on transient heat conduction and formulated the inverse problem to ascertain a set of optimal parameters utilizing stochastic approaches. We devised a computer algorithm to ascertain the specific heat capacity and thermal conductivity of diverse infill patterns, then corroborated the method utilizing materials with established attributes. The wiggle infill design produced the highest specific heat capacity values for ABS-graphene, whereas the grid infill pattern was excellent for PLA-graphene. The triangular infill pattern for ABS-graphene and the rectilinear infill pattern for PLA-graphene produced the optimal thermal conductivity values. This work emphasizes the significance of comprehending and employing inverse problem techniques in the thermal characterization of anisotropic materials, including the conductive polymers utilized in the FDM process. [ABSTRACT FROM AUTHOR]

This study investigated the effects of ultrasonic and three chemical individual and dual modification treatments on corn starch's physicochemical, thermal, and rheological properties. Ultrasonication and the three chemical treatments disrupted the starch granules with a decrease in particle size and a significant increase in the ζ-potential. The hydrophilicity of ultrasonic-oxidized dual-modified starch (U-O-CS) was the highest, at 0.854 g/g. The lipophilicity of ultrasonic-esterified dual-modified starch (U- E -CS) was the highest, at 1.485 g/g. The gelatinization temperature of ultrasonic, oxidation, and cross-linking modified starches increased significantly, with cross-linking starches being the largest. Oxidative treatment significantly decreased the starch's G' and G" and weakened the textural properties. The rheological properties of U-O-CS were further weakened. The G' of the starch decreased after the esterification treatment, while the G" increased, and the textural properties were cut. The maximum rheological and textural properties were obtained for crosslinked modification, with a hardness value of 284.70 g. [Display omitted] • Ultrasound has a synergistic effect on the properties of chemically treated starch. • Ultrasonic oxidation dual modified starch has the highest hydrophilicity. • Cross-linking starch has the best thermal stability and rheological properties. [ABSTRACT FROM AUTHOR]