From Vinylidene Fluoride (VDF) to the Applications of VDF-Containing Polymers and Copolymers: Recent Developments and Future Trends

Améduri, Bruno

doi:10.1021/cr800187m

Cited by 680 publications

(736 citation statements)

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“…However, peaks derived from reverse head-to-head linkages are usually observed in VDF-based telomers, 21 oligomers 23 and copolymers. 2,3,24 Nevertheless, in the iodine transfer polymerization of VDF in the presence of C 6 F 13 I or C 6 F 13 CH 2 CF 2 I, reverse head-to-head additions were not observed. 13,14 The 1 H NMR spectrum of the telomer (Figure 2, lower spectrum) was in agreement with the results of 19 F NMR spectroscopy.…”

Section: Piezoelectric Properties Of Vdf Telomers N Durand Et Almentioning

confidence: 95%

“…Among organic ferroelectrics, CF 3 (VDF) 17 I possesses a relatively high remanent polarization. 9 Furthermore, previous experiments on CF 3 (VDF) 13.4 C 2 H 5 revealed that the piezoelectric coefficient of VDF telomers was greater than that of oligo(VDF-co-TrFE) copolymers, and a thinner and more uniform film could be obtained. 6,7 The objective of this study was to design various VDF-based telomers, such as C n F 2n+1 (VDF) p -(C 2 H 4 ) x -X (where n¼4 or 6; p¼6-23; x¼0, 1 and X¼H or I), and to alter the crystallinity, ferroelectric and piezoelectrical properties by controlling the number of VDF units and end groups.…”

Section: Introductionmentioning

confidence: 94%

“…Thus, PVDF has been used in high-tech applications, such as [1][2][3] paints and coatings, medical suture wires, mechanical substrates for fuel cell membranes, liners for containers used to carry corrosive substances (for example, bromine), separators for lithium ion batteries and backsheets for photovoltaic cells. In addition, PVDF is a piezoelectric polymer, 4,5 and pressure or mechanical stress can induce an electrical response.…”

Section: Introductionmentioning

confidence: 99%

“…Several poly(VDF-co-TrFE) copolymers (where TrFE represents trifluoroethylene) possess piezoelectric and ferroelectric properties similar to those of CF 3 (VDF) 13.4 C 2 H 5 6,7 , CF 3 (CH 2 CF 2 ) 12 I 8 or CF 3 (VDF) 17 I 9 telomers, which have been prepared by radical telomerization of VDF with CF 3 I. However, data on the synthesis and nature of the end group (ÀCH 2 CF 2 I, ÀCF 2 CH 2 I, ÀCH 2 CH 2 I, ÀCF 2 CH 3 or ÀCH 2 CH 3 ) are relatively scarce.…”

Section: Introductionmentioning

confidence: 99%

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Vinylidene fluoride telomers for piezoelectric devices

Durand¹,

Améduri²,

Takashima³

et al. 2010

Polym J

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Original telomers based on vinylidene fluoride (VDF), C n F 2n+1 (VDF) m (CH 2 CH 2 ) p I, where n¼4 or 6, m¼5-23 and p¼0 or 1, were synthesized, and the piezoelectric properties of the materials were investigated. Low-molecular-weight polyvinylidene fluorides (PVDFs) were prepared in good yields by iodine transfer polymerization of VDF. The polymerization of VDF was conducted in the presence of 1-iodoperfluoroalkanes (C 4 F 9 I or C 6 F 13 I) and bis(4-tert-butylcyclohexyl) peroxydicarbonate, which were used as a chain transfer agent and initiator, respectively. The microstructures of VDF telomers were carefully characterized by 1 H and 19 F nuclear magnetic resonance (NMR) spectroscopy to assess the average molecular weights and the percentage of CH 2 CF 2 I functionality (that ranged from 47 to 86%). X-ray diffraction patterns of these telomers indicated that PVDFs with o7 VDF units displayed the a-form. Alternatively, telomers containing a higher amount of VDF possessed both a-and b-forms. Ethylene endcapping of C n F 2n+1 (VDF) m I was also successfully achieved in high yield, and the telomeric precursors were converted quantitatively. Moreover, three VDF telomers were vaporized into films, and the piezoelectric properties of the materials were assessed. The results revealed that C 6 F 13 (VDF) 23 I and C 4 F 9 (VDF) 21 I telomer films displayed piezoelectric responses (d 33 ¼268 pC N À1 ) and high remanent polarizations (Pr¼98.2 and 93.4 mC m À2 , respectively). In addition, C 4 F 9 (VDF) 21 C 2 H 4 I exhibited interesting ferroelectric properties (Pr¼89.9 mC m À2 ).

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Section: Piezoelectric Properties Of Vdf Telomers N Durand Et Almentioning

confidence: 95%

Section: Introductionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Vinylidene fluoride telomers for piezoelectric devices

Durand¹,

Améduri²,

Takashima³

et al. 2010

Polym J

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“…Although hydrophobic modification of existing membranes or polymers is widely applied to further improve the properties and performance of hydrophobic membranes, seeking or synthesizing a substituted polymer for hydrophobic membranes is another effective way to obtain an ideal membrane (Kang and Cao, 2014). Recently, PVDF-based copolymers like poly (vinylidene fluoride-co-tetrafluoroethylene) (PVDF-TFE), poly (vinylidene fluoride-co-trifluoroethylene) (PVDF-TrFE), poly (vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) and some kinds of PVDF-based graft copolymers have been applied in hydrophobic membrane preparation studies (Ameduri, 2009;Cui et al, 2014). These copolymers possess higher hydrophobicity due to their high fluorine content, and have attracted considerable attention as an alternative choice for hydrophobic membrane preparation (Feng et al, 2004(Feng et al, , 2006.…”

Section: Introductionmentioning

confidence: 99%

Effect of non-solvent additives on the morphology, pore structure, and direct contact membrane distillation performance of PVDF-CTFE hydrophobic membranes

Zheng

Zhang

et al. 2016

Journal of Environmental Sciences

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Four common types of additives for polymer membrane preparation including organic macromolecule and micromolecule additives, inorganic salts and acids, and the strong non-solvent H 2 O were used to prepare poly (vinylidene fluoride-co-chlorotrifluoroethylene) (PVDF-CTFE) hydrophobic flat-sheet membranes. Membrane properties including morphology, porosity, hydrophobicity, pore size and pore distribution were investigated, and the permeability was evaluated via direct contact membrane distillation (DCMD) of 3.5 g/L NaCl solution in a DCMD configuration. Both inorganic and organic micromolecule additives were found to slightly influence membrane hydrophobicity. Polyethylene glycol (PEG), organic acids, LiCl, MgCl 2 , and LiCl/H 2 O mixtures were proved to be effective additives to PVDF-CTFE membranes due to their pore-controlling effects and the capacity to improve the properties and performance of the resultant membranes. The occurrence of a pre-gelation process showed that when organic and inorganic micromolecules were added to PVDF-CTFE solution, the resultant membranes presented a high interconnectivity structure. The membrane prepared with dibutyl phthalate (DBP) showed a nonporous surface and symmetrical cross-section. When H 2 O and LiCl/H 2 O mixtures were also used as additives, they were beneficial for solid-liquid demixing, especially when LiCl/H 2 O mixed additives were used. The membrane prepared with 5% LiCl + 2% H 2 O achieved a flux of 24.53 kg/(m 2 ·hr) with 99.98% salt rejection. This study is expected to offer a reference not only for PVDF-CTFE membrane preparation but also for other polymer membranes.

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Selected Fluoropolymers (A Class of PFAS Polymers)

Dourson,

Lasee,

Onyema

2024

Patty's Toxicology

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This chapter is about a series of fluorinated polymers (fluoropolymers) which belong to a broad class of chemical substances referred to as per‐ and polyfluoroalkyl substances (PFAS). PFAS are a unique class of anthropogenic chemicals consisting of carbon and fluorine atoms joined by very strong bonds, resulting in high‐performance properties. The overall structure of these fluoropolymers is the covalent linkage of one or more monomers, at least one of which is generally short carbon chains with fluorine atoms substituting for hydrogen atoms. The resulting fluoropolymer is a much larger molecule with very different uses, kinetics, and potential toxicity than the constituent monomers. For example, fluoropolymers are generally not well‐absorbed, if at all, in biological systems, thus avoiding to a great degree of any untoward toxicity. Unlike the monomers, the resulting fluoropolymers are usually chemically stable, biologically inert and nonbioaccumulative, water and oil resistant, and useful for many industrial applications. Because the chemical structure of these fluoropolymers makes them generally biologically unreactive and chemically inert, the available epidemiology and toxicology literature is minimal. This chapter will review the literature on fluoropolymers but will also briefly discuss the toxicity of the constituent monomers. Afterward, a summary of estimates of potential human risk by various agencies will be described. For information and practical guidance on the use of terminology in regard to PFASs, readers are referred to the OECD PFAS Terminology report [OECD, Reconciling Terminology of the Universe of Per‐ and Polyfluoroalkyl Substances: Recommendations and Practical Guidance , OECD Series on Risk Management, No. 61, OECD Publishing, Paris, 2021. Available at https://www.oecd.org/chemicalsafety/portal‐perfluorinated‐chemicals/terminology‐per‐and‐polyfluoroalkyl‐substances.pdf . Accessed October 10, 2023).

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From Vinylidene Fluoride (VDF) to the Applications of VDF-Containing Polymers and Copolymers: Recent Developments and Future Trends

Abstract: Dedicated to Professor Bernard Boutevin on honor of his 60 th birthday CONTENTS 3.3.6. Poly(VDF-co-Comonomer) Copolymers Controlled via Xanthates 3.3.7. Conclusion 4. WELL-DEFINED COPOLYMERS BASED ON VINYLIDENE FLUORIDE 4.1. Fluorinated Block Copolymers Based on VDF 4.1.

Cited by 680 publications

References 377 publications

Vinylidene fluoride telomers for piezoelectric devices

Vinylidene fluoride telomers for piezoelectric devices

Effect of non-solvent additives on the morphology, pore structure, and direct contact membrane distillation performance of PVDF-CTFE hydrophobic membranes

Selected Fluoropolymers (A Class of PFAS Polymers)

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