Fluoropolymers for Automotive and Aerospace Industries

Bouharras, Fatima Ezzahra; Raihane, Mustapha; Lopez, Gérald; Améduri, Bruno

doi:10.1002/9783527815562.mme0053

Cited by 13 publications

(15 citation statements)

References 87 publications

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“…Dielectric capacitors store energy electrostatically and deliver the highest power densities among current energy storage devices, which are essential components in advanced electronic and electrical systems such as smart grids, pulsed power supply systems, and hybrid electric vehicles. [ 1–6 ] However, current dielectrics exhibit low energy density, resulting in overburdened capacitor volume and weight. [ 7–9 ] Thus, dielectrics with high energy densities are highly desired to meet the ever‐increasing demands of compact, efficient, and cost‐reducing electronic and electrical systems.…”

Section: Introductionmentioning

confidence: 99%

Ultrahigh Energy Density in Continuously Gradient‐Structured All‐Organic Dielectric Polymer Films

Jiang

Wang

Yan

et al. 2022

Adv Funct Materials

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High‐performance dielectric capacitors are critical for advanced electronics and electrical power systems. Polymeric dielectrics have been widely investigated for using in dielectric capacitors because of their high dielectric constants, flexibility, low density, and easy processability. However, it is still challenging to achieve simultaneous improvements in both energy density and efficiency in these dielectric polymers. Here, we report ferroelectric polyvinylidene‐fluoride‐based all‐organic dielectric polymer films with continuous compositional gradient structure are reported by modulating the spatial distribution of polymethyl‐methacrylate components, prepared via a facile and scalable additive manufacturing method. The continuous out‐of‐plane composition gradient in the all‐organic dielectric polymer films allows to tune electrical and mechanical behaviors, and thus induces a notably enhanced breakdown strength by modulating the electromechanical breakdown process related to the coupling of local electric field and stress. An ultrahigh discharge energy density of 38.8 J cm−3 along with a high discharge efficiency of >80% is achieved at the electric field of 800 kV mm−1 in the gradient polymer films, which is the highest energy density reported thus far in polymer‐based dielectrics including their nanocomposites and the highest energy efficiency achieved along with an energy density of >30 J cm−3.

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Section: Introductionmentioning

confidence: 99%

Ultrahigh Energy Density in Continuously Gradient‐Structured All‐Organic Dielectric Polymer Films

Jiang

Wang

Yan

et al. 2022

Adv Funct Materials

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“…Many studies have indicated that MSPBDNs can fully utilize the physical characteristics of each layer. [ 2,3,37–43 ] MSPBDNs exhibit superior breakdown strength and suppression of dielectric loss compared to single‐layered polymer‐based dielectric nanocomposites with randomly distributed nanofillers. [ 2,21,37,44–56 ] According to the nature of their interlayer, they can generally be classified into MSPBDNs with high insulation interlayer, with high dielectric interlayer, and with gradient structure.…”

Section: Types Of Multilayer‐structured Polymer‐based Dielectric Nano...mentioning

confidence: 99%

Research Progress on Multilayer‐Structured Polymer‐Based Dielectric Nanocomposites for Energy Storage

Cheng

Gao

et al. 2022

Macro Materials & Eng

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The demand for a new generation of high‐energy‐density dielectric materials in the field of capacitive energy storage is promoted by the rise of high‐power applications in electronic devices and electrical systems. Polymer‐based dielectric nanocomposites with ultrahigh charge–discharge rates and power densities play essential roles in energy storage. Recently, multilayer structure polymer‐based dielectric nanocomposites (MSPBDNs) with improved dielectric constant, breakdown constant, and discharged energy density have gained widespread interest because of their immense potential. In the present work, MSPBDNs are classified, depending on the nature of the interlayer, into those with a high insulation layer, a high dielectric layer, and a gradient structure. To further understand the breakdown process of MSPBDNs, the authors elaborate on multilayer‐structured models, analysis breakdown mechanisms, and simulations. Despite the great progress achieved, the field of developing a novel topological structure remains open to further investigation and optimization. In addition, the research prospects and directions of energy storage fields are briefly discussed and summarized.

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“…Fluoropolymers (PFs), due to their distinctive functions, have been widely used in many fields such as optical and energy storage, [ 1 ] surface/interface separation, [ 2,3 ] biotechnology, [ 4 ] and antibacterial applications. [ 5–7 ] Yet, the preparation of PFs remains promising and challenging.…”

Section: Introductionmentioning

confidence: 99%

RAFT Polymerization of Semifluorinated Monomers Mediated by a NIR Fluorinated Photocatalyst

Wang

Zhang

et al. 2022

Macromol. Rapid Commun.

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Near‐infrared (NIR) light plays an increasingly important role in the field of photoinduced electron/energy transfer‐reversible addition–fragmentation chain transfer (PET‐RAFT) polymerization due to its unique properties. Yet, the NIR photocatalyst with good stability for PET‐RAFT polymerization remains promising. Here, a strategy of NIR PET‐RAFT polymerization of semifluorinated monomers using fluorophenyl bacteriochlorin as a photocatalyst with strong absorption at the NIR light region (710–780 nm) is reported. In which, the F atoms are used to modify reduced tetraphenylporphyrin structure with enhanced photostability of photocatalyst. Under the irradiation of NIR light (λmax = 740 nm), the PET‐RAFT polymerization of semifluorinated methylacrylic monomers presents living/control characteristics and temporal modulation. By the PET‐RAFT polymerization‐induced self‐assembly (PISA) strategy, stable fluorine‐containing micelles are constructed in various solvents. In addition, the fluorinated hydrophobic surface is fabricated via a surface‐initiated PET‐RAFT (SI‐PET‐RAFT) polymerization using silicon wafer bearing RAFT agents with tunable surface hydrophobicity. This strategy not only enlightens the application of further modified compounds based on porphyrin structure in photopolymerization, but also shows promising potential for the construction of well‐defined functional fluoropolymers.

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Fluoropolymers for Automotive and Aerospace Industries

Cited by 13 publications

References 87 publications

Ultrahigh Energy Density in Continuously Gradient‐Structured All‐Organic Dielectric Polymer Films

Ultrahigh Energy Density in Continuously Gradient‐Structured All‐Organic Dielectric Polymer Films

Research Progress on Multilayer‐Structured Polymer‐Based Dielectric Nanocomposites for Energy Storage

RAFT Polymerization of Semifluorinated Monomers Mediated by a NIR Fluorinated Photocatalyst

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