Functionalization of carbon black nanoparticles with poly(vinylidene fluoride)

Vukićević, Radovan; Hierzenberger, Peter; Hild, Sabine; Beuermann, Sabine

doi:10.1002/pola.24277

Cited by 14 publications

(15 citation statements)

References 37 publications

(38 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The nucleophilic substitution of the iodide for azides, previously described in the literature, 20 was successful and proved to be specific for those oligomers with the iodine coupled to CF2 groups. However, the subsequent 1-3 dipolar addition of the azido-OVDF to alkynes failed.…”

Section: ■ Results and Discussionmentioning

confidence: 90%

A Versatile Method for the Preparation of Ferroelectric Supramolecular Materials via Radical End-Functionalization of Vinylidene Fluoride Oligomers

et al. 2016

View full text Add to dashboard Cite

ABSTRACT:A synthetic method for the end-functionalization of vinylidene fluoride oligomers (OVDF) via a radical reaction between terminal olefins and OVDF-I is described. The method shows a wide substrate scope and excellent conversions, and permits the preparation of different disc-shaped cores such as benzene-1,3,5-tricarboxamides (BTAs), perylenes bisimide (PBI) and phthalocyanines (Pc) bearing three to eight ferroelectric oligomers at their periphery. The formation, purity, OVDF conformation, and morphology of the final adducts has been assessed by a combination of techniques, such as NMR, size exclusion chromatography, (SEC), differential scanning calorimetry (DSC), polarized optical microscopy (POM) and atomic force microscopy (AFM). Finally, PBI-OVDF and Pc-OVDF materials show ferroelectric hysteresis behavior together with high remnant polarizations, with values of as high as Pr ~ 37 mC/m 2 for Pc-OVDF. This work demonstrates the potential of preparing a new set of ferroelectric materials by simply attaching OVDF oligomers to different small molecules. The use of carefully chosen small molecules paves the way to new functional materials in which ferroelectricity and electrical conductivity or light-harvesting properties coexist in a single compound. ■ INTRODUCTIONFerroelectric and piezoelectric materials play a vital role in modern technologies ranging from capacitors, hydrophones and actuators to frequency-controlled devices. 1 To further advance these technologies, access to cheaper and readily processable materials that show large ferroelectric and piezoelectric responses is highly desired. Organic materials are currently explored as they are potentially cheap, easily processable, biocompatible, and can be endowed with diverse and tunable functions. In addition, their mechanical flexibility is crucial for piezoelectric applications.Since the discovery of the first organic ferroelectric material in 1920 2 the observation of ferroelectric properties in organic materials has not been profuse. 3 In fact, most of the organic ferroelectric research is focused on polyvinylidene fluoride (PVDF). 4 PVDF displays a large remnant polarization, a short switching time, and an excellent thermal stability which makes it suitable for the fabrication of piezoelectric films. 5 The ferro-and piezoelectric properties of PVDF originate from the antiparallel intrachain arrangement of the alternated CH2 and CF2 segments in the zigzag all-anti conformation, the so-called β-form. 6 However, untreated PVDF thin films processed from the melt or from solution are not ferroelectric. 6b They possess a mixture of α, β, and γ conformations 4 and additional steps, such as mechanical stretching, 5b thermal annealing 7 and electrical poling 8 have to be performed in order to achieved the β-phase necessary to display ferro-and piezoelectric properties.More recently, vinylidene fluoride oligomers (OVDF) and poly(vinylidene fluoride-trifluoroethylene P(VDF-coTrFE), a copolymer based on PVDF, have been evaluated to enhance the format...

show abstract

Section: ■ Results and Discussionmentioning

confidence: 90%

A Versatile Method for the Preparation of Ferroelectric Supramolecular Materials via Radical End-Functionalization of Vinylidene Fluoride Oligomers

et al. 2016

View full text Add to dashboard Cite

show abstract

“…Beuermann and coworkers were the first to perform a click reaction for the synthesis of PVDF-b-PS diblock copolymers, 84 involving the copper(I)-catalyzed azide-alkyne cycloaddition (CuAAC) of alkyne-terminated PS with azideterminated PVDF, prepared from an iodine-terminated PVDF precursor. 85 Narrow dispersities around 1.2-1.3, in between the values of the original homopolymers, were obtained from SEC analysis. The PVDF block was not able to crystallize when joined with PS.…”

Section: Via Click Chemistrymentioning

confidence: 99%

Well-defined copolymers based on poly(vinylidene fluoride): From preparation and phase separation to application

Voet

Brinke

Loos

2014

J. Polym. Sci. Part A: Polym. Chem.

View full text Add to dashboard Cite

Poly(vinylidene fluoride) (PVDF) has reached the second largest production volume of fluoropolymers in recent years, and its popularity can be ascribed to high thermal stability and chemical inertness combined with its ferroelectric behavior. Copolymerization of vinylidene fluoride with other monomers leads to a wide variety of products with modified or improved properties. Besides commercially available fluorinated random copolymers, well-defined block-, graft, and alternating copolymers based on PVDF received more attention in recent years. PVDF-containing block copolymers that may selfassemble into well-ordered morphologies are of particular interest, being potential precursors for functional nanostructured materials applicable in membranes and electronics. This Highlight provides an overview of the routes developed towards these materials via conventional and controlled polymerization techniques. In addition, it discusses their nanoscopic phase behavior and current and potential applications.

show abstract

“…As a consequence, the fraction of inactive –CF 2 –CH 2 –I chain ends increases with conversion. Previously, the active species, –CH 2 –CF 2 –I, was used for follow-up reactions [ 28 , 29 , 30 ]. In all cases, only the polymer with active end groups was used.…”

Section: Introductionmentioning

confidence: 99%

Inducing β Phase Crystallinity in Block Copolymers of Vinylidene Fluoride with Methyl Methacrylate or Styrene

2017

Self Cite

View full text Add to dashboard Cite

Block copolymers of poly(vinylidene fluoride) (PVDF) with either styrene or methyl methacrylate (MMA) were synthesized and analyzed with respect to the type of the crystalline phase occurring. PVDF with iodine end groups (PVDF-I) was prepared by iodine transfer polymerization either in solution with supercritical CO 2 or in emulsion. To activate all iodine end groups Mn 2 (CO) 10 is employed. Upon UV irradiation Mn(CO) 5 radicals are obtained, which abstract iodine from PVDF-I generating PVDF radicals. Subsequent polymerization with styrene or methyl methacrylate (MMA) yields block copolymers. Size exclusion chromatography and NMR results prove that the entire PVDF-I is converted. XRD, FT-IR, and differential scanning calorimetry (DSC) analyses allow for the identification of crystal phase transformation. It is clearly shown that the original α crystalline phase of PVDF-I is changed to the β crystalline phase in case of the block copolymers. For ratios of the VDF block length to the MMA block length ranging from 1.4 to 5 only β phase material was detected.

show abstract

Functionalization of carbon black nanoparticles with poly(vinylidene fluoride)

Cited by 14 publications

References 37 publications

A Versatile Method for the Preparation of Ferroelectric Supramolecular Materials via Radical End-Functionalization of Vinylidene Fluoride Oligomers

A Versatile Method for the Preparation of Ferroelectric Supramolecular Materials via Radical End-Functionalization of Vinylidene Fluoride Oligomers

Well-defined copolymers based on poly(vinylidene fluoride): From preparation and phase separation to application

Inducing β Phase Crystallinity in Block Copolymers of Vinylidene Fluoride with Methyl Methacrylate or Styrene

Contact Info

Product

Resources

About