Surface Modification of Para-Aramid Fiber by Direct Fluorination and its Effect on the Interface of Aramid/Epoxy Composites

Peng, Tao; Cai, Runze; Chen, Chaofeng; Wang, Fengde; Li, Xiangyang; Wang, Bin; Xu, Jianjun

doi:10.1080/00222348.2011.609777

Cited by 21 publications

(9 citation statements)

References 12 publications

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“…Various alternative processing routes have been developed to modify the relatively inert polymer surface, including chemical treatment, plasma discharge, and even treatment with supercritical carbon dioxide. − For example, N-substitution of the amide hydrogen by allyl or alkyl groups reduces the stiffness of the polymeric chain, increasing its solubility in organic solvents. , In addition, the insertion of carboxylic acid groups into the PMIA main chain improves both the polymer wetting behavior and its interaction with adhesive resins. Furthermore, exposure to ultraviolet radiation improves the affinity of the polymer for dyes .…”

Section: Introductionmentioning

confidence: 99%

From Trans to Cis Conformation: Further Understanding the Surface Properties of Poly(m-phenylene isophthalamide)

Ouyang

Wang

Yu³

et al. 2017

ACS Omega

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Controlling the membrane surface properties such as hydrophobicity and hydrophilicity is critical to achieving desirable performance. For a long time, the difference between the surface wettabilities of superhydrophilic poly( m -phenylene isophthalamide) (PMIA) electrospun nanofibrous membranes (ESMs) and the superhydrophobic parent material is believed to arise from the poling effect induced by the electrospinning process and wicking caused by the porous membrane structure. In this study, the short-term poling effect was eliminated using a reference, centrifugally spun nanofibrous membrane that has a similar fiber morphology and specific surface area to those of the ESM; consequently, we investigated the changes in the surface properties of the ESM in detail. Chemical analysis by angle-resolved X-ray photoelectron spectroscopy revealed that the N and O concentrations are greater at the surface of the ESM. In addition, analysis of the membranes by attenuated total reflectance Fourier-transform infrared spectroscopy and Raman spectra revealed that large amounts of cis conformations of the amide bonds appeared on the surface of ESM after the electrospinning process. The results indicate that the remarkable surface properties of PMIA ESMs mainly arise from the change in the conformation of the amide groups from the stable trans form to the cis form. This change was confirmed by the subsequent in situ growth of Pt nanoparticles and the excellent dye adsorption capacity of the membrane.

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Section: Introductionmentioning

confidence: 99%

From Trans to Cis Conformation: Further Understanding the Surface Properties of Poly(m-phenylene isophthalamide)

Ouyang

Wang

Yu³

et al. 2017

ACS Omega

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“…Fluorination activated the surface of para-aramid fibers, so a better interface developed between epoxy and para-aramid fibers. 151 Authors used phosphoric acid treatment for surface modification of para-aramid fibers in different studies. Maximum enhancement in ILSS (82%) and fracture toughness (71%) was witnessed for nanocomposite reinforced with 10 wt% phosphoric acid-treated para-aramid fibers.…”

Section: Mechanical Performance Of Para-aramid Fiber-reinforced Polym...mentioning

confidence: 99%

A review of the emerging approaches for developing multi‐scale filler‐reinforced epoxy nanocomposites with enhanced impact performance

Shelly,

Singhal,

Nanda

et al. 2024

Polymer Composites

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Fiber‐reinforced polymer composites (FRPCs) are utilized for myriad applications owing to their exceptional characteristics like high specific strength and stiffness. However, the low‐to‐moderate impact strength of these materials is a major constraint restricting their usage in fields requiring high‐impact performance. To ensure the reliable performance of FRPCs throughout the intended life span, a combination of good static mechanical properties and high impact resistance is crucial. Recent advancements in this field have yielded a breakthrough by developing novel materials that overcome this limitation. This groundbreaking achievement was realized by processing epoxy‐based GFRPs containing a synergistic blend of surface‐modified nano‐clay and compatibilized polymeric fiber micro‐reinforcement. This review provides an overview of advancements in the development of FRPCs, starting from the single‐filler to multi‐scale filler‐reinforced materials. The review elaborates on the effect of reinforcement of various thermoplastic fibers (polyethylene, para‐aramid, and spandex) on the mechanical performance of FRPCs. The necessity of filler compatibilization to enhance interfacial bonding constituents is also discussed. It can be concluded that the choice of surface treatment for a given thermoplastic fiber is governed by its chemical composition, the functional groups to be added on its surface through a specific compatibilization treatment, and the chemical nature of other constituents of the composite system with which the treated fiber surface interacts. Further, the greater the elasticity and ductility of the reinforced thermoplastic fiber, the higher the impact strength of the resulting epoxy‐based GFRPs. Finally, the review brings forth the potential opportunities for future research in this area.Highlights Discussed recent advancements in epoxy‐based GFRPs with multi‐scale filler reinforcement. Multi‐scale filler‐reinforced epoxy‐based GFRPs have myriad applications in aviation, automobile, marine, sports, etc. Nano‐/micro‐fillers in their pristine state degrade the mechanical performance of epoxy‐based GFRPs. Filler compatibilization is essential for achieving superior mechanical performance in epoxy‐based GFRPs. Reinforcing compatibilized soft/ductile thermoplastic fibers resulted in a notable increase in impact strength while maintaining tensile properties.

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“…At present, various approaches of the modification for PMIA fiber have been adopted to change relatively inert polymer surfaces, including chemical treatment, plasma discharge, and even ultrasonic treatment . Nevertheless, some of these methods have constrained the practical use, and frequently lead to the decrease of the mechanical strength, elevated production cost, and complicated work procedures .…”

Section: Introductionmentioning

confidence: 99%

Effect of treatment pressure on structures and properties of PMIA fiber in supercritical carbon dioxide fluid

Zheng

Zhang

et al. 2014

J of Applied Polymer Sci

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The effects of treatment pressure on the structures and properties of PMIA fiber were investigated by Scanning electron microscopy, Dynamic wetting measurements, Fourier transform infrared spectrometry, X‐ray diffraction, thermogravimetric analysis, and mechanical properties test technology in supercritical carbon dioxide. The results indicated that the surface morphology, the water contact angle, the interaction of macromolecules, the crystal structure, the thermal property, and tensile strength of PMIA fibers were changed during supercritical carbon dioxide treatment, particularly the surface morphology and the wettability of fiber changed the most obviously with the increase of treatment pressure. Furthermore, the thermal property and tensile strength of treated PMIA fiber sample were improved in comparison with those of untreated sample. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41756.

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Surface Modification of Para-Aramid Fiber by Direct Fluorination and its Effect on the Interface of Aramid/Epoxy Composites

Cited by 21 publications

References 12 publications

From Trans to Cis Conformation: Further Understanding the Surface Properties of Poly(m-phenylene isophthalamide)

From Trans to Cis Conformation: Further Understanding the Surface Properties of Poly(m-phenylene isophthalamide)

A review of the emerging approaches for developing multi‐scale filler‐reinforced epoxy nanocomposites with enhanced impact performance

Effect of treatment pressure on structures and properties of PMIA fiber in supercritical carbon dioxide fluid

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