Comprehensive Study on the Reinforcement of Electrospun PHB Scaffolds with Composite Magnetic Fe3O4-rGO Fillers: Structure, Physico-Mechanical Properties, and Piezoelectric Response

Artyom S Pryadko; Yulia R Mukhortova; Roman V Chernozem; Lada E Shlapakova; Dmitry V Wagner; Konstantin Romanyuk; Evgeny Y Gerasimov; Andrei Kholkin; Roman A Surmenev; Maria A Surmeneva

doi:10.1021/acsomega.2c05184

Comprehensive Study on the Reinforcement of Electrospun PHB Scaffolds with Composite Magnetic Fe₃O₄-rGO Fillers: Structure, Physico-Mechanical Properties, and Piezoelectric Response

ACS Omega. 2022 Nov 4;7(45):41392-41411. doi: 10.1021/acsomega.2c05184. eCollection 2022 Nov 15.

Authors

Affiliations

¹ Physical Materials Science and Composite Materials Center, Research School of Chemistry & Applied Biomedical Sciences, Tomsk Polytechnic University, Tomsk634050, Russia.
² Tomsk State University, Tomsk634050, Russia.
³ Department of Physics & CICECO-Aveiro Institute of Materials, University of Aveiro, Aveiro3810-193, Portugal.
⁴ International Research & Development Center of Piezo- and Magnetoelectric Materials, Research School of Chemistry and Applied Biomedical Sciences, Tomsk Polytechnic University, Tomsk634050, Russia.
⁵ Boreskov Institute of Catalysis SB RAS, Novosibirsk630090, Russia.
⁶ School of Natural Sciences and Mathematics, Ural Federal University, Ekaterinburg620000, Russia.

Abstract

This is a comprehensive study on the reinforcement of electrospun poly(3-hydroxybutyrate) (PHB) scaffolds with a composite filler of magnetite-reduced graphene oxide (Fe₃O₄-rGO). The composite filler promoted the increase of average fiber diameters and decrease of the degree of crystallinity of hybrid scaffolds. The decrease in the fiber diameter enhanced the ductility and mechanical strength of scaffolds. The surface electric potential of PHB/Fe₃O₄-rGO composite scaffolds significantly increased with increasing fiber diameter owing to a greater number of polar functional groups. The changes in the microfiber diameter did not have any influence on effective piezoresponses of composite scaffolds. The Fe₃O₄-rGO filler imparted high saturation magnetization (6.67 ± 0.17 emu/g) to the scaffolds. Thus, magnetic PHB/Fe₃O₄-rGO composite scaffolds both preserve magnetic properties and provide a piezoresponse, whereas varying the fiber diameter offers control over ductility and surface electric potential.