TY - JOUR

T1 - Electrospun magnetoactive hybrid P(VDF-TrFE) scaffolds heavily loaded with citric-acid-modified magnetite nanoparticles

AU - Botvin, Vladimir

AU - Shlapakova, Lada

AU - Mukhortova, Yulia

AU - Wagner, Dmitry

AU - Gerasimov, Evgeny

AU - Romanyuk, Konstantin

AU - Surmeneva, Maria

AU - Kholkin, Andrei

AU - Surmenev, Roman

N1 - The authors thank the central laboratories of Tomsk Polytechnic University (Analytical Center) for the XPS measurements. HRTEM studies were carried out using the facilities of the shared research center “National center of investigation of catalysts” at the Boreskov Institute of Catalysis. The research was conducted at Tomsk Polytechnic University. Financial support from the Ministry of Science and Higher Education of Russia is acknowledged (grant agreement #075-15-2021-588 of June 1, 2021). A part of this work was developed within the scope of the project CICECO-Aveiro Institute of Materials, UIDB/50011/2020 & UIDP/50011/2020, financed by national funds through the Portuguese Foundation for Science and Technology/MCTES. It is also funded by national funds (OE), through FCT – Fundação para a Ciência e a Tecnologia, I.P. in the scope of the framework contract foreseen in the numbers 4, 5 and 6 of the article 23, of the Decree-Law 57/2016, of August 29, changed by Law 57/2017, of July 19. The English language was corrected and certified by shevchuk-editing.com.

PY - 2024/3/1

Y1 - 2024/3/1

N2 - The development of magnetoactive scaffolds based on piezoelectric polymers is of great interest due to their ability to exert a magnetoelectric effect, their flexibility, and biocompatibility in various prospective applications. This study describes fabrication of novel electrospun magnetoactive scaffolds based on poly(vinylidene fluoride-co-trifluoroethylene) [P(VDF-TrFE)] loaded with a high content (20 or 25 wt%) of magnetite nanoparticles modified by citric acid (Fe3O4-CA) and data on their structure and physicochemical, mechanical, and magnetic properties as well as a piezoelectric response. The suspension method gave a uniform nanoparticles' distribution in the electrospun scaffolds without any noticeable agglomeration. Raman and infrared spectroscopy and X-ray diffraction analysis indicated that the fabricated pure scaffolds and composite P(VDF-TrFE)/Fe3O4-CA scaffolds contain both piezoactive phases (β and γ). The composite scaffolds doped with 20 or 25 wt% of Fe3O4-CA nanoparticles were found to have the highest saturation magnetization, 12.7 and 14.1 emu/g, respectively, superior to that of other PVDF-Fe3O4–based magnetoactive scaffolds. Besides, the incorporation of 20 or 25 wt% of Fe3O4-CA nanoparticles substantially decreased total crystallinity of the piezopolymer scaffolds from 60.7% to 46.9% and 42.7%, respectively. Addition of 20 wt% of Fe3O4-CA nanoparticles also diminished ultimate strength and Young's modulus but improved elongation at break. Meanwhile, in composite P(VDF-TrFE)/Fe3O4-CA scaffolds loaded with 20 wt% of the magnetic filler, the piezoresponse was similar to that of pure P(VDF-TrFE) scaffolds. Such changes in properties are explained by the interaction between P(VDF-TrFE) polymer chains and the surface of Fe3O4-CA nanoparticles via hydrogen bonds and dipolar bonds.

AB - The development of magnetoactive scaffolds based on piezoelectric polymers is of great interest due to their ability to exert a magnetoelectric effect, their flexibility, and biocompatibility in various prospective applications. This study describes fabrication of novel electrospun magnetoactive scaffolds based on poly(vinylidene fluoride-co-trifluoroethylene) [P(VDF-TrFE)] loaded with a high content (20 or 25 wt%) of magnetite nanoparticles modified by citric acid (Fe3O4-CA) and data on their structure and physicochemical, mechanical, and magnetic properties as well as a piezoelectric response. The suspension method gave a uniform nanoparticles' distribution in the electrospun scaffolds without any noticeable agglomeration. Raman and infrared spectroscopy and X-ray diffraction analysis indicated that the fabricated pure scaffolds and composite P(VDF-TrFE)/Fe3O4-CA scaffolds contain both piezoactive phases (β and γ). The composite scaffolds doped with 20 or 25 wt% of Fe3O4-CA nanoparticles were found to have the highest saturation magnetization, 12.7 and 14.1 emu/g, respectively, superior to that of other PVDF-Fe3O4–based magnetoactive scaffolds. Besides, the incorporation of 20 or 25 wt% of Fe3O4-CA nanoparticles substantially decreased total crystallinity of the piezopolymer scaffolds from 60.7% to 46.9% and 42.7%, respectively. Addition of 20 wt% of Fe3O4-CA nanoparticles also diminished ultimate strength and Young's modulus but improved elongation at break. Meanwhile, in composite P(VDF-TrFE)/Fe3O4-CA scaffolds loaded with 20 wt% of the magnetic filler, the piezoresponse was similar to that of pure P(VDF-TrFE) scaffolds. Such changes in properties are explained by the interaction between P(VDF-TrFE) polymer chains and the surface of Fe3O4-CA nanoparticles via hydrogen bonds and dipolar bonds.

UR - http://www.scopus.com/inward/record.url?partnerID=8YFLogxK&scp=85185348701

UR - https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=tsmetrics&SrcApp=tsm_test&DestApp=WOS_CPL&DestLinkType=FullRecord&KeyUT=001200365100001

U2 - 10.1016/j.polymer.2024.126765

DO - 10.1016/j.polymer.2024.126765

M3 - Article

VL - 296

SP - 126765

JO - Polymer

JF - Polymer

SN - 0032-3861

ER -