Title Additive manufacturing and experimental research of polyvinylidene fluoride cellular structures and transducers /
Translation of Title Polivinilidenfluorido gardelinių konstrukcijų bei keitiklių adityvi gamyba ir eksperimentiniai tyrimai.
Authors Mullaveettil, Farusil Najeeb
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Pages 102
Keywords [eng] 3D printing ; PVDF ; lightweight structures ; mechanical properties ; piezoelectric sensors
Abstract [eng] Additive manufacturing (AM) of lightweight structures and piezoelectric devices using high-performance thermoplastics is relevant within the context of Industry 4.0 for development of higher value-added products conforming to more specialized functional requirements of bio-medical/chemical, aerospace, automotive and other industries. In this research work effective AM process parameters were identified for consistent open-chamber 3D printing of fluoropolymers including PVDF, biocompatible PVDF-HFP copolymer and static-dissipative PVDF-HFP/graphene composite. These findings are useful for successful fused filament fabrication of various difficult-to-print polymers with higher crystallinity and hydrophobicity. The influence of different standard and bioinspired cellular infills on strength, elastic modulus and mechanical anisotropy of lightweight PVDF prints was characterized under tensile, flexural and compressive loading regimes. These results are conducive to rational design of lightweight functional parts for use in demanding operational conditions, requiring excellent chemical, UV and fire resistance, dimensional stability or biocompatibility. A concept of electrical poling-assisted and poling-free 3D printing of piezopolymeric transducers was demonstrated by fabricating flexible piezoelectric sensors and weekly piezo-active bioinspired 3D structures with periodic minimal surfaces, which could serve as electrostimulating bioscaffolds with predefined lattice structure.
Dissertation Institution Kauno technologijos universitetas.
Type Doctoral thesis
Language English
Publication date 2022