The facile preparation of aramid insulation paper from the bottom-up nanofiber synthesis

Tian, Wenting; Qiu, Teng; Shi, Yifei; He, Longfei; Tuo, Xinlin

doi:10.1016/j.matlet.2017.04.127

Cited by 60 publications

(35 citation statements)

References 8 publications

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“…In previous reports, [34] using polyoxyethylene ether as interfacial tailoring agents can effectively control the degree of aggregation of PPTA during the polymerization process and finally stabilize PPTA aggregates into nanofibers with the diameter in the nanometer range of 20-60 nm. [11] In fact, the solvent NMP and cosolvent CaCl 2 also have good interfacial stabilization and isolation effects on PPTA molecules. The same results can be achieved by adjusting the polymerization conditions.…”

Section: Copolymerization Of Ppta With Different Comonomersmentioning

confidence: 99%

“…[4] Retaining the excellent mechanical properties, ANFs have high-specific surface area and good dispersibility in solvent, which can be easily used to fabricate functional nanocomposites as a kind of nanoscale building block. [5,6] For example, ANFs have been used to construct battery separators exhibiting excellent performances, [7][8][9][10] aramid papers with high-mechanical strength and great thermal stability for high-grade insulation demands, [11] nanocomposites with the incorporation with graphene or multiwalled carbon nanotubes, and many other functional materials. [12][13][14][15][16] ANFs have also been applied in the fabrication of organic aerogels with high porosity, low density, and great thermal stability.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, it is an excellent opportunity for us to study the influence of copolymerization on the structure and performance of ANFs. On the other hand, one of the most important use of ANF is to prepare aramid paper, [11] which is an essential raw material for the application of high-grade insulation and honeycomb. It is widely used in aviation, aerospace, electronics, communications, and other fields.…”

Section: Introductionmentioning

confidence: 99%

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The bottom‐up synthesis for aramid nanofibers: The influence of copolymerization

Shi

Qiu

Tuo

2020

J of Applied Polymer Sci

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Aramid based on poly (p‐phenylene terephthalamide) (PPTA) is widely concerned as high‐performance materials. Herein, copolymerized aramid nanofibers (CANFs) were prepared for the first time by a direct bottom‐up polymerization method without additives. Three kinds of third monomers of m‐phenylenediamine, 4,4′‐diaminodiphenyl ether, and 2,5‐dichloro‐1,4‐phenylenediamine were separately copolymerized in PPTA and transformed into nanofiber dispersions in water medium. The characterization results revealed the relationship between the morphology of products and the structure as well as dosages of the different kinds of monomers, which was explained by the influence on conjugate regularities of the PPTA molecules. Furthermore, CANFs were used to build aramid paper blended in pure PPTA nanofibers, and the mechanical and insulation properties of composite paper were improved significantly, which would be of potential use as the new building block for aramid composite materials.

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Section: Copolymerization Of Ppta With Different Comonomersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The bottom‐up synthesis for aramid nanofibers: The influence of copolymerization

Shi

Qiu

Tuo

2020

J of Applied Polymer Sci

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“…In addition, as seen in Figure 1B, studies on ANF have been conducted in different research areas, such as materials science, engineering, chemistry, and polymer science, which demonstrates the increasing attention of ANF has received from varied quarters. It is considered a promising nanoscale building block and has been extensively applied in composite reinforcement, [ 5–7 ] electrical insulating materials, [ 8–10 ] adsorption and filtration media, [ 11,12 ] battery separators, [ 13,14 ] flexible electrodes, [ 15–18 ] and biological tissue. [ 19–21 ]…”

Section: Introductionmentioning

confidence: 99%

Fabrication, Applications, and Prospects of Aramid Nanofiber

Yang

Wang

Zhang

et al. 2020

Adv Funct Materials

260

175

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Aramid nanofibers (ANFs) are of great interest in various applications due to its 1D nanoscale, high aspect ratio, high specific surface area, excellent strength, and modulus as well as impressive chemical and thermal stabilities. It is considered as one of the most promising nano-sized building blocks with excellent properties and has therefore drawn increasing attention since 2011. However, no review has summarized the research progress and the prospective challenges of ANF. Herein, the methods of ANF fabrication and their relative merits are comprehensively discussed together with the challenges and progress in the deprotonation method for preparing ANF. The fabrication methods and development of ANF-based advanced materials with different macroscopic morphologies, including the 1D ANF aerogel fiber, 2D ANF film/nanopaper/coating, and 3D ANF gel and particle are also described. Furthermore, the applications of ANF in nanocomposite reinforcement, battery separators, electrical insulation nanopaper, flexible electronics, and adsorption and filtration media are presented. Additionally, the possible challenges and outlooks toward the future development of ANF are highlighted. This review indicates that the ANF and ANF-based materials mentioned herein will boost the development of next-generation advanced functional materials.

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“…Despite the progress made toward PPTA nanofibers in these efforts, significant challenges with solubility still remain, specifically the reliance on extremely harsh solvents and impractical methods. Bottom‐up synthesis of short, water dispersed ANFs has been demonstrated, but limitations remain with respect to nanofiber properties . To produce PPTA nanofibers in large‐scale batches using organic solvents, solubility must be enhanced, ideally without significantly disrupting interchain hydrogen bonding and the resulting mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and mechanical properties of para‐aramid nanofibers

Trexler

Hoffman

Smith

et al. 2019

J Polym Sci B Polym Phys

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Scalable, bottom‐up chemical synthesis and electrospinning of novel Cl‐substituted poly(para‐phenylene terephthalamide) (PPTA) nanofibers are herein reported. To achieve Cl‐PPTA nanofibers, the chemical reaction between the monomers was precisely controlled, and dissolution of the polymer into solvent was tailored to enable anisotropic solution formation and sufficient entanglement molecular weight. Electrospinning processing parameters were studied to understand their effects on fiber formation and mat morphology and then optimized to yield consistently high quality fibers. Importantly, the control of relative humidity during the fiber formation process was found to be critical, likely because water promotes hydrogen bond formation between the PPTA chains. The fiber and mat morphologies resulting from different combinations of chemistry and spinning conditions were observed using scanning electron microscopy, and observations were used as inputs to the optimization process. Tensile properties of single Cl‐PPTA nanofibers were characterized for the first time using a nanomanipulator mounted inside a scanning electron microscope (SEM), and fiber moduli measuring up to 70 GPa, and strengths exceeding 1 GPa were achieved. Given the excellent mechanical properties measured for the nanofibers, this chemical synthesis procedure and electrospinning protocol appear to be a promising route for producing a new class of nanofibers with ultrahigh strength and stiffness. © 2019 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2019, 57, 563–573

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The facile preparation of aramid insulation paper from the bottom-up nanofiber synthesis

Cited by 60 publications

References 8 publications

The bottom‐up synthesis for aramid nanofibers: The influence of copolymerization

The bottom‐up synthesis for aramid nanofibers: The influence of copolymerization

Fabrication, Applications, and Prospects of Aramid Nanofiber

Synthesis and mechanical properties of para‐aramid nanofibers

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