Tough Silica-Hybridized Epoxy Resin/Anhydride System with Good Corona Resistance and Thermal Stability for Permanent Magnet Synchronous Wind-Driven Generators through Vacuum Pressure Impregnation

Zhou, Cheng; Gu, Aijuan; Liang, Guozheng; Xia, Yu

doi:10.1021/ie504737g

Cited by 11 publications

(7 citation statements)

References 43 publications

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“…As shown in the figure, neat epoxy resin has smooth and river-like surface in different planes indicating a typical brittle feature without any ductility. 52,53 The brittle fracture of the network, which accounts for its poor fracture toughness, indicates there is no energy dissipation mechanism here. However, the modified epoxy samples show extremely rough surface.…”

Section: Morphological Studiesmentioning

confidence: 99%

Epoxy matrix toughness improvement via reactive bio-resin alloying

Mohajeri

Zohuriaan‐Mehr

Pazokifard

2016

High Performance Polymers

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A facile solvent-less approach to toughen epoxy thermosets by means of a bio-based resin, that is, poly(furfuryl alcohol) (PFA; furan resin) is reported. The bio-resin PFA was firstly synthesized through polycondensation reaction of furfuryl alcohol as a bio-monomer and maleic anhydride as a catalyst. Different amounts of PFA were blended with diglycidyl ether of bisphenol A epoxy resin and cured by diethylenetriamine as a hardener, which simultaneously cross-linked both of the epoxy and PFA resins. The curing process was studied by Furrier transform infrared spectroscopy and differential scanning calorimetry. Scanning electron microscopy of the chemically cured blends revealed no phase separation. It was found remarkable increase in flexural modulus and strength of the neat and modified epoxies with increasing PFA content up to around 15%. Moreover, in comparison with neat epoxy, the epoxy-PFA thermosets showed 60% increase in critical stress intensity factor and 123% increase in critical strain energy release rate. In fact, chemical reaction of PFA-incorporated epoxy could toughen the epoxy matrix without sacrificing the flexural strength and modulus. Toughening was obtained through cross-link density reduction. As exhibited by dynamic mechanical thermal analysis, Tan δ and magnitude of β-relaxation were also increased for the epoxy-PFA alloys. Overall, this green, simple, concise and cost-effective approach was suggested for being considered to produce toughened epoxy thermosets in industrial scale.

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Section: Morphological Studiesmentioning

confidence: 99%

Epoxy matrix toughness improvement via reactive bio-resin alloying

Mohajeri

Zohuriaan‐Mehr

Pazokifard

2016

High Performance Polymers

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“…Epoxy resins play an indispensable role in almost every industry including aerospace, electric information, insulation, new energy and many other areas owing to their excellent adhesion, chemical resistance and mechanical and dielectric properties. They take about 70% of the market share of thermosetting resins and thus belong to one of the most important species of petrochemical products.…”

Section: Introductionmentioning

confidence: 99%

Biobased epoxy resin derived from eugenol with excellent integrated performance and high renewable carbon content

Miao

Yuan

Guan

et al. 2018

Polymer International

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Developing biobased epoxy resin with high renewable carbon content and outstanding integrated performance is beneficial for both sustainable development and applications in cutting-edge fields. Herein, a biobased epoxy monomer (TEUP-EP) with high renewable carbon content (100%) was synthesized from renewable eugenol with a sustainable process; TEUP-EP was then blended with 4,4 ′ -diaminodiphenylmethane (DDM) to develop a new biobased epoxy resin (TEUP-EP/DDM). The integrated performance of TEUP-EP/DDM resin was studied and compared with that of petroleum-based diglycidyl ether of bisphenol A (DGEBA)/DDM resin. Compared with DGEBA/DDM resin, TEUP-EP/DDM resin has much better integrated performance and not only exhibits a glass transition temperature about 26 ∘ C higher and a 24.4% or 57% increased flexural strength or modulus, but also shows outstanding flame retardancy. Specifically, the limiting oxygen index increases from 26.5% to 31.4% and the UL-94 grade improves from no rating to the V-0 level; moreover, the peak heat release rate and total heat release decreased by 63.1% and 57.4%, respectively. All these results fully prove that TEUP-EP/DDM is a novel biobased high performance epoxy resin. The mechanism behind these attractive integrated performances is discussed intensively.

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“…Polymer modification also improves its compatibility with carbon fiber and hence, enhances mechanical properties through improved compatibility with the carbon fiber reinforcement. This was demonstrated by performing a multi-step process to functionalise SiO 2 powders with diglycidyl ether of bisphenol-A (DGEBA) (Zhou et al, 2015). The functionalised SiO 2 (12% w/w) was polymerized with BPADE epoxy resin and methyl hexahydrophthalic anhydride hardener and cured.…”

Section: Interlaminar Shear Strength (Ilss)mentioning

confidence: 99%

Recent Developments in Graphene Oxide/Epoxy Carbon Fiber-Reinforced Composites

2019

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The two-dimensional macro molecule graphene and its derivatives have widely been investigated for their application as nanofiller in carbon fiber-reinforced composites (CFRC). Research has progressed from techniques that disperse graphene as a mixing constituent within the composite material to more complex examples where graphene is covalently bonded to fiber, matrix or both via multiple reaction steps. This field of research is multidisciplinary whereby branches of materials, engineering, polymer science, physics and chemistry often overlap. From the materials engineering perspective, the desire is to discover the novel materials targeting industrial applications and obtain a full understanding of the graphene oxide chemistry and interaction of graphene oxide with a polymer matrix. To date, most of the research is targeted at (i) improving the fiber/matrix interface properties and/or (ii) improving the dispersion of nanofiller within the matrix; both factors ultimately improve composite performance. Organizing that information critically can lead to emergence of a generalization of material design. Therefore, the objective of this work is to critically review current state of art in the field of graphene oxide/epoxy CFRCs and propose the design rules based on current scientific trend and common themes for future works.

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Tough Silica-Hybridized Epoxy Resin/Anhydride System with Good Corona Resistance and Thermal Stability for Permanent Magnet Synchronous Wind-Driven Generators through Vacuum Pressure Impregnation

Cited by 11 publications

References 43 publications

Epoxy matrix toughness improvement via reactive bio-resin alloying

Epoxy matrix toughness improvement via reactive bio-resin alloying

Biobased epoxy resin derived from eugenol with excellent integrated performance and high renewable carbon content

Recent Developments in Graphene Oxide/Epoxy Carbon Fiber-Reinforced Composites

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