Effect of novel UV-curing approach on thermo-mechanical properties of colored epoxy composites in outsized dimensions

Atif, Muhammad; Yang, Jinshan; Yang, Haitao; Nie, Jun; Bongiovanni, Roberta Maria

doi:10.1177/0021998315616174

Cited by 18 publications

(13 citation statements)

References 26 publications

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“…Ultraviolet (UV) radiation (high energy, frequency at order of >10 6 GHz, wavelength of <10 -4 mm): Thermoset curing using UV radiation is an economic, cost saving, energy efficient and environmental friendly process [80][81][82]. However, its application is limited to thin structures due to low depth of penetration of the radiation in epoxy/composite.…”

Section: Electron Beam Radiationmentioning

confidence: 99%

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Accelerated microwave curing of fibre-reinforced thermoset polymer composites for structural applications: A review of scientific challenges

Mgbemena

Lin

et al. 2018

Composites Part A: Applied Science and Manufacturing

123

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Accelerated curing of high performance fibre-reinforced polymer (FRP) composites via microwave heating or radiation, which can significantly reduce cure time and increase energy efficiency, has several major challenges (e.g. uneven depth of radiation penetration, reinforcing fibre shielding, uneven curing, introduction of hot spots etc). This article reviews the current scientific challenges with microwave curing of FRP composites considering the underlying physics of microwave radiation absorption in thermoset-matrix composites. The fundamental principles behind efficient accelerated curing of composites using microwave radiation heating are reviewed and presented, especially focusing on the relation between penetration depth, microwave frequency, dielectric properties and cure degree. Based on this review, major factors influencing microwave curing of thermoset-matrix composites are identified, and recommendations for efficient cure cycle design are provided.

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Section: Electron Beam Radiationmentioning

confidence: 99%

“…However, its application is limited to thin structures due to low depth of penetration of the radiation in epoxy/composite. In most recent applications, the UV radiation is normally used in open mould processes and with thin UV transparent composites [22,23,82].…”

Section: Electron Beam Radiationmentioning

confidence: 99%

Accelerated microwave curing of fibre-reinforced thermoset polymer composites for structural applications: A review of scientific challenges

Mgbemena

Lin

et al. 2018

Composites Part A: Applied Science and Manufacturing

123

View full text Add to dashboard Cite

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“…Then mixture was poured into mold and kept at 296K for period of 12 hours. The Standard sample was also prepared by adopting the same method [7].…”

Section: Methodsmentioning

confidence: 99%

Photo-Curing Schemes to Cure the Epoxy Resins and their Impacts on Curing Process

2018

J Chem Appl

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Different schemes to photo-cure the epoxy resins are reviewed in this article. Photo curing of epoxy resin by UV-polymerization mechanism is one of the effective methods. "A light induced chemical practice to cure the dry composites i.e. coatings or films are the termed as photo curing". The most important fact of photo curing is that it gives best performance, eco-friendly compatibility, and efficacy of processing. So, due to these facts, thermal curing is replaced by photo curing. Photo curing is applicable only for the films of definite thickness and colored composites. Epoxy resin and photo initiator were mixed together and then mixtures were cured through a curing reaction which was proceeded in the presence of infrared or ultraviolet light (UV-Light), or an electron beam.

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“…Because of this, the use of UV curing has traditionally been limited to thin films, such as paints, coatings, and adhesives. 11 In order to extend the application of UV curing for making thick parts, some model-based control approaches have recently been proposed. An approach proposed in Yebi and Ayalew 9 and later expanded in Yebi and Ayalew 7 introduced a model-based feedback compensation approach for the in-domain attenuation of UV.…”

Section: Introductionmentioning

confidence: 99%

“…An approach proposed in Yebi and Ayalew 9 and later expanded in Yebi and Ayalew 7 introduced a model-based feedback compensation approach for the in-domain attenuation of UV. In Atif et al, 11 Nele et al, 12 and Yebi and Ayalew, 13,14 a stepped-concurrent curing and layering approach was proposed for making thick parts in a layer-by-layer additive process. In this process, a new layer is added before previous ones cure completely in such a way that the cure-level deviations across the final multi-layer thick part can be minimized.…”

Section: Introductionmentioning

confidence: 99%

On the Inter-Laminar Shear Strength of Composites Manufactured via a Stepped-Concurrent UV Curing and Layering Process

Beyene

Ayalew

Pilla

2019

Journal of Composite Materials

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In this paper, we set to examine the inter-laminar shear strength of a fiber-reinforced composite part manufactured via a stepped-concurrent ultraviolet curing and layering process. This process was specifically proposed for making epoxy-based thick parts, whereby a layer-by-layer, model-based, optimal layering time and ultraviolet control scheme is set up with the objective of minimizing the degree of cure deviation across the final thick part. We focus on a cationic curing process wherein additional energy savings are possible by switching off the ultraviolet source after initiating the curing reaction with the ultraviolet source at each layer addition. Since the inter-laminar sheer strength of parts made via a layering process is often a concern, we consider the application of in-situ consolidation pressure in the layering process. We then characterize the inter-laminar shear strength by manufacturing samples with application of different in-situ consolidation pressures and measuring the inter-laminar shear strength of each sample by the short-beam shear test. The results showed that the inter-laminar shear strength of composite parts fabricated with the proposed stepped-concurrent curing, and layering process increases with the applied consolidation pressure up to a point. Scanning electron microscopy of samples cured at different in-situ consolidation pressure showed that the sample with optimum consolidation pressure has relatively uniform fiber to resin distribution and hence improved inter-laminar shear strength.

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Effect of novel UV-curing approach on thermo-mechanical properties of colored epoxy composites in outsized dimensions

Cited by 18 publications

References 26 publications

Accelerated microwave curing of fibre-reinforced thermoset polymer composites for structural applications: A review of scientific challenges

Accelerated microwave curing of fibre-reinforced thermoset polymer composites for structural applications: A review of scientific challenges

Photo-Curing Schemes to Cure the Epoxy Resins and their Impacts on Curing Process

On the Inter-Laminar Shear Strength of Composites Manufactured via a Stepped-Concurrent UV Curing and Layering Process

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