Effects of Solvent and Electrospinning Parameters on the Morphology and Piezoelectric Properties of PVDF Nanofibrous Membrane

Jiayi, Yin; Boaretti, Carlo; Lorenzetti, Alessandra; Martucci, Alessandro; Roso, Martina; Modesti, Michele

doi:10.3390/nano12060962

Cited by 33 publications

(31 citation statements)

References 40 publications

(64 reference statements)

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“…The The common solvents used in PVDF-based fibers are DMF, Ac, dimethylacetamide (DMAc), tetrahydrofuran (THF), and their mixtures. 44 For instance, PVDF was dissolved in DMF/ Ac at a volume ratio of 6:4. 45 Fu et al dispersed the PVDF/ Zn(Ac) 2 mixture in DMF/Ac with a mass ratio of 3:1.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Antibody-Conjugated Electrospun Nanofibers for Electrochemical Detection of Methamphetamine

Atik

Kilic

Horzum

et al. 2023

ACS Appl. Mater. Interfaces

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Multifunctional electrospun nanofibers (ENs) with improved properties have increased attention nowadays. Their insoluble forms in water with decreased hydrophobicity are desired for the immobilization of biological molecules. Also, the addition of functional groups on the backbone provides the conjugation of biomolecules onto the surface of ENs via covalent bonds to increase their stability. Here, poly(vinylidene fluoride) (PVDF) was chosen to prepare a platform, which is insoluble in water, and polyethylenimine (PEI) was used to add amine groups on the surface of ENs to bind biological molecules via covalent conjugation. So, PVDF-PEI nanofibers were prepared on a glassy carbon electrode to immobilize an antimethamphetamine antibody (Anti-METH) as a model biomolecule. The obtained PVDF-PEI/Anti-METH was used for the bioelectrochemical detection of methamphetamine (METH), a common illicit drug. Bioelectrochemical detection of METH on PVDF-PEI/Anti-METH-coated electrodes was carried out by voltammetry in the range of 2.0–50 ng/mL METH. Moreover, the effect of dansyl chloride (DNC) derivatization of METH on the sensitivity of PVDF-PEI/Anti-METH was tested. Finally, METH analysis was carried out in synthetic body fluids. The obtained results showed that PVDF-PEI ENs can be adopted as an immobilization matrix for the biorecognition elements of biobased detection systems, and the derivative of METH (METH-DNC) increased the sensitivity of PVDF-PEI/Anti-METH.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Antibody-Conjugated Electrospun Nanofibers for Electrochemical Detection of Methamphetamine

Atik

Kilic

Horzum

et al. 2023

ACS Appl. Mater. Interfaces

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“…Therefore, the TENGs made of PA66/graphene fiber film with 2 wt% graphene content were the most suitable experimental sample. Further, the piezoelectric properties of PVDF films were tested by the method reported by Yin [ 36 ], so the highest output was only 0.8V, meaning, in this paper, the piezoelectric effect of PVDF films was not considered.…”

Section: Resultsmentioning

confidence: 99%

Electrospun PA66/Graphene Fiber Films and Application on Flexible Triboelectric Nanogenerators

Huang

et al. 2022

Materials

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Triboelectric nanogenerators (TENGs) are considered to be the most promising energy supply equipment for wearable devices, due to their excellent portability and good mechanical properties. Nevertheless, low power generation efficiency, high fabrication difficulty, and poor wearability hinder their application in the wearable field. In this work, PA66/graphene fiber films with 0, 1 wt%, 1.5 wt%, 2 wt%, 2.5 wt% graphene and PVDF films were prepared by electrospinning. Meanwhile, TENGs were prepared with PA66/graphene fiber films, PVDF films and plain weave conductive cloth, which were used as the positive friction layer, negative friction layer and the flexible substrate, respectively. The results demonstrated that TENGs prepared by PA66/graphene fiber films with 2 wt% grapheme showed the best performance, and that the maximum open circuit voltage and short circuit current of TENGs could reach 180 V and 7.8 μA, respectively, and that the power density was 2.67 W/m2 when the external load was 113 MΩ. This is why the PA66/graphene film produced a more subtle secondary network with the addition of graphene, used as a charge capture site to increase its surface charge. Additionally, all the layered structures of TENGs were composed of breathable electrospun films and plain conductive cloth, with water vapor transmittance (WVT) of 9.6 Kgm−2d−1, reflecting excellent wearing comfort. The study showed that TENGs, based on all electrospinning, have great potential in the field of wearable energy supply devices.

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“…Ferroelectric materials (FEMs), which can be activated to generate electrical, heat, mechanical, and optical signals with excellent properties like ferroelectricity, pyroelectricity, piezoelectricity, and nonlinear optics, have a good prospect in biomedical applications. ,, Polyvinylidene fluoride (PVDF) and its copolymers are one of the most typical and highly investigated candidates for use in tissue engineering among FEMs not only because of their good processability and biocompatibility but also because of their efficient ferroelectricity through which PVDF can be spontaneously polarized by the external electric field. Thereafter, the electric potential is generated and subsequently transmitted to the neighboring tissue, resulting in the recruitment of osteogenic cells and promotion of the osteogenic differentiation for bone regeneration. − PVDF is a semicrystalline polymer composed of five known crystalline phases (α, β, γ, δ, ε), of which α phase and β phase account for the main part. , The non-polar α phase lacks an efficient conformation for electroactive properties; on the other hand, the polar β phase exhibits the most electroactive properties due to the high-density dipoles in the same direction, defining the essential crystal for ferroelectric and piezoelectric properties. − It should be noted that electrospinning is a favorable technique with simple operation and cheap cost providing a high electric field for polarization and at the same time offering intense stretching of the PVDF jet, thus altering the PVDF crystalline phase from α phase to the desired β phase. − Through adjusting spinning parameters, further enhancement of the β phase content and the degree of crystallinity can be obtained, which are intended to improve the piezoelectric and ferroelectric properties. − …”

Section: Introductionmentioning

confidence: 99%

MXene-Functionalized Ferroelectric Nanocomposite Membranes with Modulating Surface Potential Enhance Bone Regeneration

Huang

Feng

et al. 2023

ACS Biomater. Sci. Eng.

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Rapid and effective bone defect repair remains a challenging issue for clinical treatment. Applying biomaterials with endogenous surface potential has been widely studied to enhance bone regeneration, but how to regulate the electric potential and surface morphology of the implanted materials precisely to achieve an optimal bioelectric microenvironment is still a major challenge. The aim of this study is to develop electroactive biomaterials that better mimic the extracellular microenvironment for bone regeneration. Hence, MXene/polyvinylidene fluoride (MXene/ PVDF) ferroelectric nanocomposite membranes were prepared by electrospinning. Physicochemical characterization demonstrated that Ti 3 C 2 T x MXene nanosheets were wrapped in PVDF shell layer and the surface morphology and potential were modulated by altering the content of MXene, where uniform distribution of fibers and enhanced electric potential can be obtained and precisely assembled into a natural extracellular matrix (ECM) in bone tissue. Consequently, the MXene/PVDF membranes facilitated cell adhesion, stretching, and growth, showing good biocompatibility; meanwhile, their intrinsic electric potential promoted the recruitment of osteogenic cells and accelerated the differentiation of osteoblast. Furthermore, 1 wt % MXene/PVDF membrane with a suitable surface potential and better topographical structure for bone regeneration qualitatively and quantitatively promoted bone tissue formation in a rat calvarial bone defect after 4 and 8 weeks of healing. The fabricated MXene/PVDF ferroelectric nanocomposite membranes show a biomimetic microenvironment with a sustainable electric potential and optimal 3D topographical structure, providing an innovative and well-suited strategy for application in bone regeneration.

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Effects of Solvent and Electrospinning Parameters on the Morphology and Piezoelectric Properties of PVDF Nanofibrous Membrane

Cited by 33 publications

References 40 publications

Antibody-Conjugated Electrospun Nanofibers for Electrochemical Detection of Methamphetamine

Antibody-Conjugated Electrospun Nanofibers for Electrochemical Detection of Methamphetamine

Electrospun PA66/Graphene Fiber Films and Application on Flexible Triboelectric Nanogenerators

MXene-Functionalized Ferroelectric Nanocomposite Membranes with Modulating Surface Potential Enhance Bone Regeneration

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