title: Ferroelectric polymer scaffolds based on a copolymer of tetrafluoroethylene with vinylidene fluoride: fabrication and properties.
abstract: A solution blow spinning technique is a method developed recently for making nonwoven webs of micro- and nanofibres. The principal advantage of this method compared to a more traditional electrospinning process is its significantly higher production rate. In this work, the solution blow spinning method was further developed to produce nonwoven polymeric scaffolds based on a copolymer of tetrafluoroethylene with vinylidene fluoride solution in acetone. A crucial feature of the proposed method is that high-voltage equipment is not required, which further improves the method's economics. Scanning electron microscopy analysis of the samples demonstrated that the surface morphology of the nonwoven materials is dependent on the polymer concentration in the spinning solution. It was concluded that an optimum morphology of the nonwoven scaffolds for medical applications is achieved by using a 5% solution of the copolymer. It was established that the scaffolds produced from the 5% solution have a fractal structure and anisotropic mechanical properties. X-ray diffraction, infrared spectroscopy, Raman spectroscopy and differential scanning calorimetry demonstrated that the fabricated nonwoven materials have crystal structures that exhibit ferroelectric properties. Gas chromatography has shown that the amount of acetone in the nonwoven material does not exceed the maximum allowable concentration of 0.5%. In vitro analysis, using the culture of motile cells, confirmed that the nonwoven material is non-toxic and does not alter the morpho-functional status of stem cells for short-term cultivation, and therefore can potentially be used in medical applications.
authors.affiliation: Tomsk Polytechnic University, 634050, 30, Lenin Avenue, Tomsk, Russia. Electronic address: ebolbasov@gmail.com.
authors.forename: E N
authors.initials: EN
authors.lastname: Bolbasov
authors.affiliation: Griffith University, School of Biomolecular and Physical Sciences, Brisbane, QLD, Australia. Electronic address: Y.Anissimov@Griffith.edu.au.
authors.forename: Y G
authors.initials: YG
authors.lastname: Anissimov
authors.affiliation: Tomsk Polytechnic University, 634050, 30, Lenin Avenue, Tomsk, Russia. Electronic address: andrius_222@mail.ru.
authors.forename: A V
authors.initials: AV
authors.lastname: Pustovoytov
authors.affiliation: Tomsk Polytechnic University, 634050, 30, Lenin Avenue, Tomsk, Russia; Tomsk Scientific Research Institute of Balneology and Physiotherapy, Tomsk, Russia. Electronic address: khlusov63@mail.ru.
authors.forename: I A
authors.initials: IA
authors.lastname: Khlusov
authors.affiliation: Tomsk Scientific Research Institute of Balneology and Physiotherapy, Tomsk, Russia. Electronic address: prim@niikf.tomsk.ru.
authors.forename: A A
authors.initials: AA
authors.lastname: Zaitsev
authors.affiliation: Tomsk Scientific Research Institute of Balneology and Physiotherapy, Tomsk, Russia. Electronic address: zaitsev-kv@mail.ru.
authors.forename: K V
authors.initials: KV
authors.lastname: Zaitsev
authors.affiliation: Tomsk State University, 634050, 36, Lenin Avenue, Tomsk, Russia. Electronic address: 201kiop@mail.ru.
authors.forename: I N
authors.initials: IN
authors.lastname: Lapin
authors.affiliation: Tomsk Polytechnic University, 634050, 30, Lenin Avenue, Tomsk, Russia. Electronic address: tverd@tpu.ru.
authors.forename: S I
authors.initials: SI
authors.lastname: Tverdokhlebov
mesh_terms: D002460:Cell Line; D049109:Cell Proliferation / Q000187:drug effects; D005466:Fluorocarbons / Q000737:chemistry*; D006801:Humans; D057139:Nanofibers / Q000737:chemistry* / Q000633:toxicity; D011108:Polymers / Q000138:chemical synthesis / Q000737:chemistry*; D016062:Porosity; D013499:Surface Properties; D014753:Vinyl Compounds / Q000737:chemistry*
chemical_list: D005466:Fluorocarbons; D011108:Polymers; D014753:Vinyl Compounds; C007384:1,1-difluoroethylene; C015531:tetrafluoroethylene
keywords: Cytotoxicity; Human stromal cells; Morpho-functional status; Polymeric ferroelectrics; Scaffolds; Solution blow spinning