Functional, lightweight materials

Costa, Carlos M.; Lanceros‐Méndez, S.

doi:10.1016/b978-0-12-818501-8.00014-7

Cited by 2 publications

(2 citation statements)

References 10 publications

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“…As a suitable substitute, organic coatings were applied on the surface of polyolefin microporous films. Organic coatings such as polydopamine (PDA), 30 polyvinylidene fluoride (PVDF), 31 cellulose diacetate (CDA), 32 polyvinyl alcohol (PVA), 33 aramid nanofiber (ANF), 34 poly(methyl methacrylate) (PMMA), 35 polyimide (PI), 36 and poly(p‐phenylene terephthalamide) (PPTA) 37 are applied to polyolefin separators. The reason for organic coatings to be applied to the surface of polyolefins is because there are a large number of polar groups in the organic coatings, which have affinity for the electrolyte, thereby enhancing the absorption and retention capacity of polyolefin separator for the electrolyte and improving battery performance.…”

Section: Introductionmentioning

confidence: 99%

Hierarchical self‐assembly of tannic acid/diethylenetriamine on polypropylene for high‐performance separator

Wang,

Han,

Liu

et al. 2024

J of Applied Polymer Sci

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In lithium‐ion batteries (LIBs), separator is used to provide a barrier between the anode and cathode and provide freedom for the transport of lithium‐ions, which serves a key function in inhibiting internal short circuit and improving the battery safety. The limited wettability of commercial polyolefin separators in electrolytes restricts its utilization in extreme environmental conditions. In our work, we choose polypropylene (PP) as the precursor and can address the issue of poor wettability through suitable modification methods. Tannic acid (TA) and diethylenetriamine (DETA) were utilized to coat PP separator via hierarchical self‐assembly approach, and the coating is further stabilized by taking advantage of the specific oxidizing properties of sodium periodate. This method scarcely increases the separator thickness or sacrifices the microporous structure of the original separator. The improved separator not only exhibits outstanding wetting capability and relatively high ion conductivity (1.24 mS cm−1), but also has the highest lithium‐ion migration number of 0.74. This indicates that when the modified separator is applied to LIBs, its electrochemical performance is significantly enhanced. The enhancement in electrochemical performance of LIBs is attributed to the strong absorption and retention ability of the coating on the separator. The reversible capacity of Li/PP‐TD2 separator/LiFePO4 battery is 144.3 mAh g−1 at 2C, which is higher than that of PP separator (117.1 mAh g−1) under the same current density. Even after 200 cycles, the PP‐TD2 separator with two‐layer assembly modification still maintains a higher coulombic efficiency of 97.55% and a discharge capacity of 96.6%. This hierarchical self‐assembly modification of PP provides an effective approach for fabricating high‐performance separator.

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Section: Introductionmentioning

confidence: 99%

Hierarchical self‐assembly of tannic acid/diethylenetriamine on polypropylene for high‐performance separator

Wang,

Han,

Liu

et al. 2024

J of Applied Polymer Sci

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“…This involves developments in research and applications oriented towards the study of newly conceived structural architectures, the dissemination of more accurate analysis methodologies, the rationalization of inspection methods and procedures, and the optimization of production processes, as well as towards use of new materials. On the basis of these themes, the lines of research involving composite materials and, more specifically, smart materials, are strategic [11]. In many cases, such smart materials are also referred to as multifunctional materials because they are required to perform multiple functions (self-healing and remodeling materials, materials for sustainability and energy, advanced manufacturing of multifunctional materials, sensor, actuation, and control) [12,13].…”

Section: Introduction 1overview Of Smart and Multifunctional Material...mentioning

confidence: 99%

High-Performance Properties of an Aerospace Epoxy Resin Loaded with Carbon Nanofibers and Glycidyl Polyhedral Oligomeric Silsesquioxane

et al. 2022

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This paper proposes a new multifunctional flame retardant carbon nanofiber/glycidyl polyhedral oligomeric silsesquioxane (GPOSS) epoxy formulation specially designed for lightweight composite materials capable of fulfilling the ever-changing demands of the future aerospace industry. The multifunctional resin was designed to satisfy structural and functional requirements. In particular, this paper explores the advantages deriving from the combined use of GPOSS and CNFs (short carbon nanofibers) to obtain multifunctional resins. The multifunctional material was prepared by incorporating in the epoxy matrix heat-treated carbon nanofibers (CNFs) at the percentage of 0.5 wt% and GPOSS compound at 5 wt% in order to increase the mechanical performance, electrical conductivity, thermal stability and flame resistance property of the resulting nanocomposite. Dynamic mechanical analysis (DMA) shows that the values of the Storage Modulus (S.M.) of the resin alone and the resin containing solubilized GPOSS nanocages are almost similar in a wide range of temperatures (from 30 °C to 165 °C). The presence of CNFs, in the percentage of 0.5 wt%, determines an enhancement in the S.M. of 700 MPa from −30 °C to 180 °C with respect to the resin matrix and the resin/GPOSS systems. Hence, a value higher than 2700 MPa is detected from 30 °C to 110 °C. Furthermore, the electrical conductivity of the sample containing both GPOSS and CNFs reaches the value of 1.35 × 10−1 S/m, which is a very satisfying value to contrast the electrical insulating property of the epoxy systems. For the first time, TUNA tests have been performed on the formulation where the advantages of GPOSS and CNFs are combined. TUNA investigation highlights an electrically conductive network well distributed in the sample. The ignition time of the multifunctional nanocomposite is higher than that of the sample containing GPOSS alone of about 35%.

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Functional, lightweight materials

Cited by 2 publications

References 10 publications

Hierarchical self‐assembly of tannic acid/diethylenetriamine on polypropylene for high‐performance separator

Hierarchical self‐assembly of tannic acid/diethylenetriamine on polypropylene for high‐performance separator

High-Performance Properties of an Aerospace Epoxy Resin Loaded with Carbon Nanofibers and Glycidyl Polyhedral Oligomeric Silsesquioxane

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