Random copolymer membrane coated PBO fibers with significantly improved interfacial adhesion for PBO fibers/cyanate ester composites

Tang, Lin; Zhang, Junliang; Gu, Junwei

doi:10.1016/j.cja.2020.03.007

Cited by 85 publications

(22 citation statements)

References 53 publications

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“…Therefore, the concentration of GO used in this study is not sufficient to serve as an EMI shielding barrier material. Moreover, further studies are related to cross-linking coating of nanofillers [ 73 ] or adding hybrid fillers, for example, Mxene-rGO [ 32 ] and thermally annealed MXene aerogels (TCTA) [ 74 ] and thermally annealed graphene aerogels [ 33 ], in the epoxy, which improve the EMI shielding performance.…”

Section: Resultsmentioning

confidence: 99%

Experimental Characterization and Modeling Multifunctional Properties of Epoxy/Graphene Oxide Nanocomposites

2021

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Thermomechanical modeling of epoxy/graphene oxide under quasi-static and dynamic loading requires thermo-mechanical properties such as Young’s modulus, Poisson’s ratio, thermal conductivity, and frequency-temperature dependent viscoelastic properties. In this study, the effects of different graphene oxide (GO) concentrations (0.05, 0.1, and 0.2 wt%) within an epoxy matrix on several mechanical and thermal properties were investigated. The distribution of GO fillers in the epoxy was investigated using transmission electron microscopy (TEM). The digital image correlation (DIC) technique was employed during the tensile testing to determine Young’s modulus and Poisson’s ratio. Analytical models were used to predict Young’s modulus and thermal conductivity, with an error of less than 13% and 9%, respectively. Frequency–temperature dependent phenomenological models were proposed to predict the storage moduli and loss tangent, with a reasonable agreement with experimental data. A relatively high storage modulus, heat-resistance index (THRI), and thermal conductivity were observed in 0.2 wt% nanocomposite samples compared with pure epoxy and other lower concentration GO nanocomposites. A high THRI and derivative of thermogravimetric analysis peak temperatures (Tm1 and Tm2) were exhibited by adding nano-fillers in the epoxy, which confirms higher thermal stability of nanocomposites than that of pristine epoxy.

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Section: Resultsmentioning

confidence: 99%

Experimental Characterization and Modeling Multifunctional Properties of Epoxy/Graphene Oxide Nanocomposites

2021

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“…As a result, GO cannot react with all the hydroxyl and epoxy groups in the sizing agent, and its coverage morphology on the CF surface is changed for that. In some studies, researchers use the “heat‐resistance index” 53,54 to characterize the thermal stability of polymers, but it only applies to polymer matrix and its composites, not to CF.…”

Section: Resultsmentioning

confidence: 99%

Enhanced interfacial interactions of carbon fiber/epoxy resincomposites by regulatingPEG‐E51and graphene oxide complex sizing at the interface

Chi

Liang

et al. 2021

Polymers for Advanced Techs

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A method of using modified epoxy resin (PEG‐E51) and graphene oxide (GO) as sizing agent in different pH has been proposed and applied to improve the interfacial interactions and bonding of carbon fiber (CF) reinforced epoxy resin‐based (EP) composites. The PEG‐E51 and GO complex sizing in different pH is prepared and then coated on CF surfaces homogeneously. The sizing layer forms on the fiber surfaces, and multiple GO sheets are introduced successfully surrounding the CFs. The surface morphologies of CFs change distinctly with different pH. The interfacial shear strength increases from 51.36 MPa for bare fiber‐reinforced EP composites to 66.62 MPa for composites reinforced by CFs coated with GO only. However, a significant improvement is achieved when the pH is adjusted to 10, making the interfacial shear strength grow up to 77.23 MPa. Furthermore, scanning electron microscopy results and interlaminar shear strength test are in agreement with each other, suggesting better interface bonding of composites by regulating pH of PEG‐E51 and GO complex sizing. Besides, the interfacial interaction mechanism in CF reinforced composites is also explored, that is, the positive effects of roughness and specific surface area in complex interfacial layers lead to the improvement of interfacial properties.

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“…The study showed that the ILSS of the PBO/Epoxy composite almost-doubled post corona treatment, while heat treatment showed an upward trend of up to 50% increase in ILSS. In a study by Tang et al, 11 reversible addition-fragmentation chain transfer (RAFT) polymerisation was used to form a dense random copolymer membrane on the surface of PBO fibres. The results from this study ensured better single fibre pull out strength of the PBO/cyanate-ester composites post-treatment.…”

Section: Introductionmentioning

confidence: 99%

Comparative studies of nitrogen plasma and argon plasma treatment on the strength of PBO fibre reinforced high-temperature resistant thermoplastic composite

Sudheendra

Vinodhini

Govindaraju

2021

High Performance Polymers

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The study involves the processing of a novel poly [1, 4-phenylene-cis-benzobisoxazole] (PBO) fibre reinforced high-temperature thermoplastic composite with polyaryletherketone (PAEK) as the matrix. The PBO fibre and the PAEK film surface was modified using the method of argon and nitrogen plasma treatment. The investigation primarily focuses on evaluating the tensile properties of the fabricated laminates and correlating it with the effect of plasma treatment, surface characteristics, and its fracture surface. A 5% decrease in tensile strength was observed post argon plasma treatment while a 27% increase in strength was observed post nitrogen plasma treatment. The morphology of the failure surface was investigated by scanning electron microscopy and an interfacial failure was observed. Furthermore, the effect of plasma on the wettability of PBO fibres and PAEK film surface was confirmed by the Dynamic Contact Angle analysis and sessile drop method respectively. FTIR spectral analysis was done to investigate the effect of plasma treatment on the chemical structure on the surface. The results of the wettability study showed that the argon plasma treatment of the fibre surface increased its hydrophobicity while nitrogen plasma treatment resulted in the reduction of contact angle.

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Random copolymer membrane coated PBO fibers with significantly improved interfacial adhesion for PBO fibers/cyanate ester composites

Cited by 85 publications

References 53 publications

Experimental Characterization and Modeling Multifunctional Properties of Epoxy/Graphene Oxide Nanocomposites

Experimental Characterization and Modeling Multifunctional Properties of Epoxy/Graphene Oxide Nanocomposites

Enhanced interfacial interactions of carbon fiber/epoxy resincomposites by regulatingPEG‐E51and graphene oxide complex sizing at the interface

Comparative studies of nitrogen plasma and argon plasma treatment on the strength of PBO fibre reinforced high-temperature resistant thermoplastic composite

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