A new approach to the preparation of poly(p-phenylene terephthalamide) nanofibers

Yan, Hongchen; Li, Jinglong; Tian, Wenting; He, Longfei; Tuo, Xinlin; Qiu, Teng

doi:10.1039/c6ra01602b

Cited by 87 publications

(75 citation statements)

References 31 publications

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“…In the spectrum of unfilled XNBR, there only appears a broad characteristic peak at 2θ = 18.7°, corresponding to the amorphous structure of XNBR . For ANFs, the characteristic peaks at around 20.6, 23.1, and 28.5° correspond to (110), (200), and (004) lattice planes, respectively . The observed diffraction peaks of hANFs are similar to those of ANFs, which indicate the reservation of the crystalline structures of PPTA in the nanoscale domains after acid hydrolysis.…”

Section: Resultsmentioning

confidence: 80%

Tailoring the structure of Kevlar nanofiber and its effects on the mechanical property and thermal stability of carboxylated acrylonitrile butadiene rubber

Xue

Kuan

Yin

et al. 2019

J of Applied Polymer Sci

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Water‐dispersible hydrolyzed Kevlar nanofibers (hANFs) prepared by acid‐assisted hydrothermal treatments of Kevlar nanofibers (ANFs) were first incorporated into carboxylated acrylonitrile butadiene rubber (XNBR) by a latex co‐coagulation method. The obtained hANFs maintained the one‐dimensional nanofibrous morphology and crystal structure as ANFs. There were amounts of polar groups appearing at the end of hANFs molecular chains after hydrothermal process, which led to the strong hydrogen bonding interaction between the filler and XNBR matrix. The results indicated that hANFs had significant reinforcement effects on the mechanical properties, crosslink density, and thermal stability of XNBR matrix. In comparison with those of neat XNBR, the tensile strength, tear strength, crosslink density, and maximum heat decomposition temperature (Tmax) of XNBR/hANFs nanocomposites filled with 7 phr hANFs increased by 236%, 161%, 35%, and 19.64 °C, respectively. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47698.

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Section: Resultsmentioning

confidence: 80%

Tailoring the structure of Kevlar nanofiber and its effects on the mechanical property and thermal stability of carboxylated acrylonitrile butadiene rubber

Xue

Kuan

Yin

et al. 2019

J of Applied Polymer Sci

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“…Therefore, researchers have been devoted to the pursuit of an applicable, effective, and scaled‐up preparation method for ANF as progresses have been made in nanotechnology and the need for high‐performance nanomaterials has increased. Two kinds of strategies have been developed to this end so far: 1) the bottom‐up method, namely polymerization‐induced self‐assembly [ 33 ] and 2) top‐down approaches such as electrospinning, [ 34 ] mechanical disintegration, [ 35 ] and deprotonation. [ 4 ]…”

Section: Fabrication Methods Of Anfmentioning

confidence: 99%

“…Therefore, researchers initially proposed fabricating ANF directly through monomer polymerization. Tuo et al [ 33 ] has developed a polymerization‐induced self‐assembly process to achieve ANF. It is generally accepted that in the traditional polymerization process, PPTA molecular chains aggregate as the chain growths and form a high‐molecular‐weight PPTA, as shown in Figure A.…”

Section: Fabrication Methods Of Anfmentioning

confidence: 99%

Fabrication, Applications, and Prospects of Aramid Nanofiber

Yang

Wang

Zhang

et al. 2020

Adv Funct Materials

259

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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“…In our recent research, we reported a bottom‐up synthesis of PPTA nanofibers. We found that the polymerized fibrillar units in the polymerization solution fabricated from the monomers exhibited strong tendency to self‐assemble into nanofibers with high aspect ratio, which could transform into self‐standing films with perfect mechanical strength by their self‐entanglement without any additional polymer binders . Taking advantage of the assembly capability of the fibrillar units in polymerization solution, we suppose that a porous and fibrous PPTA network can be built, which is induced by nonsolvent induced phase separation (NIPS) when the polymerization solution coated onto the commercial PP separators is immersed in the coagulation bath.…”

Section: Introductionmentioning

confidence: 99%

A phase separation method toward PPTA–polypropylene nanocomposite separator for safe lithium ion batteries

Qiu

Xie

et al. 2018

J of Applied Polymer Sci

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The building of separators with high thermal stability and security is important for lithium ion batteries. A novel, simple and successive process, which aims at coating poly-p-phenylene terephthamide (PPTA) onto commercial polypropylene (PP) separators, has been demonstrated. Without any additional binder, the PPTA nanofiber coating layer sticks to the porous PP separators by physical anchoring, endowing the composite separators with modified wettability toward electrolytes and heat resistance. Meanwhile, migration routes for lithium ions are guaranteed by the porous structure controlled by the self-assembly of the fibrillar units during the nonsolvent induced phase separation. The cells equipped with the composite separators show better cycling performances. Moreover, the system based on the composite separators shows a sharp drop in ion conductivity after heat treatment at 200 8C for a certain period, indicating the shutdown effect of the composite separators, which can contribute to additional safety of lithium ion batteries.

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A new approach to the preparation of poly(p-phenylene terephthalamide) nanofibers

Abstract: Poly(p-phenylene terephthalamide) nanofibers were prepared via a polymerization induced self-assembly process with the assistance of methoxy polyethylene glycol (mPEG).

Cited by 87 publications

References 31 publications

Tailoring the structure of Kevlar nanofiber and its effects on the mechanical property and thermal stability of carboxylated acrylonitrile butadiene rubber

Tailoring the structure of Kevlar nanofiber and its effects on the mechanical property and thermal stability of carboxylated acrylonitrile butadiene rubber

Fabrication, Applications, and Prospects of Aramid Nanofiber

A phase separation method toward PPTA–polypropylene nanocomposite separator for safe lithium ion batteries

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