Evaluation of the electromechanical behavior of polyvinylidene fluoride used as a component of risers in the offshore oil industry

Medeiros, Khrissy Aracélly Reis; Rangel, Eduardo Queirós; Sant’Anna, Alexandre Ribeiro; Louzada, Daniel Ramos; Barbosa, Carlos Roberto Hall; d’Almeida, J.R.M.

doi:10.2516/ogst/2018058

Cited by 28 publications

(16 citation statements)

References 27 publications

(36 reference statements)

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“…To assess the crystalline phases of the PVDF scaffolds, we performed FT-IR analysis. FT-IR spectra of PVDF powder (a raw material), and the A type and B type of PVDF scaffolds revealed characteristic bands located at 614, 763, 796, 874, 975, and 1072 cm −1 , and at 840, 1174, and 1276 cm −1 , which correspond to the α-phase and β-phase, respectively ( Figure S1; Medeiros et al, 2018). As expected, the spectrum of PVDF powder showed notable bands at 614, 763, 796, and 975 cm −1 , indicative of a dominant α-phase content.…”

Section: Characterization Of the Pvdf Scaffoldmentioning

confidence: 99%

Maintenance and differentiation of human ES cells on polyvinylidene fluoride scaffolds immobilized with a vitronectin‐derived peptide

Park¹,

Yeon

Goo³

et al. 2020

Journal Cellular Physiology

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Polyvinylidene fluoride (PVDF) is biocompatible, easy to fabricate, and has piezoelectric properties; it has been used for many biomedical applications including stem cell engineering. However, long‐term cultivation of human embryonic stem cells (hESCs) and their differentiation toward cardiac lineages on PVDF have not been investigated. Herein, PVDF nanoscaled membrane scaffolds were fabricated by electrospinning; a vitronectin‐derived peptide‐mussel adhesive protein fusion (VNm) was immobilized on the scaffolds. hESCs cultured on the VNm‐coated PVDF scaffold (VNm–PVDF scaffold) were stably expanded for more than 10 passages while maintaining the expression of pluripotency markers and genomic integrity. Under cardiac differentiation conditions, hESCs on the VNm–PVDF scaffold generated more spontaneously beating colonies and showed the upregulation of cardiac‐related genes, compared with those cultured on Matrigel and VNm alone. Thus, VNm–PVDF scaffolds may be suitable for the long‐term culture of hESCs and their differentiation into cardiac cells, thus expanding their application in regenerative medicine.

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Section: Characterization Of the Pvdf Scaffoldmentioning

confidence: 99%

Maintenance and differentiation of human ES cells on polyvinylidene fluoride scaffolds immobilized with a vitronectin‐derived peptide

Park¹,

Yeon

Goo³

et al. 2020

Journal Cellular Physiology

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“…A strong absorption peak at 3280 cm –1 can be assigned to the −OH and N–H groups in the PET fabric. In addition, three additional peaks at 1625, 1505, and 1230 cm –1 are characteristic of the presence of CO stretching vibration, benzene ring skeletal vibration, and C–O stretching vibration in the PET fabric, respectively. − On the other hand, the PVDF-coated PET fabric shows peaks at 1400, 1180, 870, and 840 cm –1 , characteristic of C–H bending, C–F stretching, C–H wagging, and C–F bending in the PVDF polymer. − The peak at 840 cm –1 implies a β crystalline phase of the PVDF polymer as shown in Figure f. Hence, the presence of the PVDF polymer on the surface of the PET fabric is confirmed by the FTIR results.…”

Section: Resultsmentioning

confidence: 99%

High-Performance Triboelectric Nanogenerators Based on Commercial Textiles: Electrospun Nylon 66 Nanofibers on Silk and PVDF on Polyester

Bairagi

Khandelwal

Karagiorgis

et al. 2022

ACS Appl. Mater. Interfaces

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A high-performance textile triboelectric nanogenerator is developed based on the common commercial fabrics silk and polyester (PET). Electrospun nylon 66 nanofibers were used to boost the tribo-positive performance of silk, and a poly(vinylidene difluoride) (PVDF) coating was deployed to increase the tribo-negativity of PET. The modifications confer a very significant boost in performance: output voltage and short-circuit current density increased ∼17 times (5.85 to 100 V) and ∼16 times (1.6 to 24.5 mA/m2), respectively, compared with the Silk/PET baseline. The maximum power density was 280 mW/m2 at a 4 MΩ resistance. The performance boost likely results from enhancing the tribo-positivity (and tribo-negativity) of the contact layers and from increased contact area facilitated by the electrospun nanofibers. Excellent stability and durability were demonstrated: the nylon nanofibers and PVDF coating provide high output, while the silk and PET substrate fabrics confer strength and flexibility. Rapid capacitor charging rates of 0.045 V/s (2 μF), 0.031 V/s (10 μF), and 0.011 V/s (22 μF) were demonstrated. Advantages include high output, a fully textile structure with excellent flexibility, and construction based on cost-effective commercial fabrics. The device is ideal as a power source for wearable electronic devices, and the approach can easily be deployed for other textiles.

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“…When ice forms on the SS surface, the polar metal oxide functional groups increase the electrostatic interactions between ice and the surface, resulting in higher ice adhesion strength. , Polar metal oxide bonding on the SS surface is confirmed by XPS (Figure S5 of the Supporting Information). − For PDMS/SS, the electrically nonpolar CH 3 ligand has less electrostatic interaction with ice, and thus, the ice adhesion strength is reduced . In addition, the ice adhesion strength of SiO 2 /PDMS/SS is further reduced owing to the decrease in the contact area.…”

Section: Resultsmentioning

confidence: 99%

Icephobic Coating through a Self-Formed Superhydrophobic Surface Using a Polymer and Microsized Particles

Moon

Yasmeen

Park

et al. 2022

ACS Appl. Mater. Interfaces

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Icephobic coatings have been extensively studied for decades to overcome the potential damage associated with ice formation in various devices that are operated under harsh weather conditions. Superhydrophobic surface coatings have been applied for icephobic coating applications owing to their low surface energy. In this study, an icephobic coating of a self-formed superhydrophobic surface using polydimethylsiloxane (PDMS) and SiO 2 powder was investigated. The effect of superhydrophobicity on icephobicity was determined by varying the experimental parameters. Polyvinylidene fluoride (PVDF) was added to the PDMS solution to improve the mechanical properties of the icephobic layer. The PDMS−PVDF solution also showed a self-formation behavior into a superhydrophobic surface. In addition, the icephobicity and mechanical properties of the PDMS−PVDF mixture coating improved because of the multilevel nanostructure formed by physical and chemical interactions between the mixture and SiO 2 powder. We believe that the proposed approach will be a suitable candidate for various practical applications of icephobicity and a model system to understand the correlation between superhydrophobicity and icephobicity.

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Evaluation of the electromechanical behavior of polyvinylidene fluoride used as a component of risers in the offshore oil industry

Cited by 28 publications

References 27 publications

Maintenance and differentiation of human ES cells on polyvinylidene fluoride scaffolds immobilized with a vitronectin‐derived peptide

Maintenance and differentiation of human ES cells on polyvinylidene fluoride scaffolds immobilized with a vitronectin‐derived peptide

High-Performance Triboelectric Nanogenerators Based on Commercial Textiles: Electrospun Nylon 66 Nanofibers on Silk and PVDF on Polyester

Icephobic Coating through a Self-Formed Superhydrophobic Surface Using a Polymer and Microsized Particles

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