Microstructure Characterization of Laser Treated Surfaces

Buchman, A.; Kalil, Carol R.; Dodiuk‐Kenig, H.; Rotel, M.

doi:10.1080/00218460108030736

Cited by 7 publications

(4 citation statements)

References 3 publications

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“…However, in literature, there are a limited number of papers on laser surface treatment of composite materials. Many of them concern the use of CO 2 , Nd:YAG or UV laser source, while no studies on the use of Yb:YAG fiber laser are reported, even more so on Carbon Fiber Reinforced Thermoplastic Polymers.…”

Section: Introductionmentioning

confidence: 99%

“…Then the process is predominantly characterized by a photo chemical mechanism rather than a thermal one, like in the case of IR laser sources. As a result, it is possible to obtain the direct sublimation of the irradiated material with a reduction of the HAZ . For sources operating in the far or near infrared, the mechanisms consist of the direct heating of the matrix (typically in the case of CO 2 sources, λ = 10,600 nm) or indirect heating of the matrix, by way of the reinforcement radiation absorption which transfers heat to the matrix (typically in the case of Nd:YAG sources, λ = 1,064 nm, and CFRP composite).…”

Section: Introductionmentioning

confidence: 99%

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Increasing adhesive bonding of carbon fiber reinforced thermoplastic matrix by laser surface treatment

Genna

Leone

Ucciardello

et al. 2017

Polymer Engineering & Sci

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In this study, laser surface treatment of CFRP made of PPS thermoplastic matrix by means of Q-switched Yb:YAG fiber laser is investigated with the aim to improve CFRP adhesive bonding. Two set of experimental tests were developed. In the first, laser treatments were executed fixing the average power (Pa) and changing: the pulse power, the scanning speed, the hatch distance, and the scanning strategy. These tests were performed to individuate the laser-material interaction mechanisms and the process window. The treated surfaces were investigated using optical microscopy. It was found that the treatment is able to remove the outer layer of the matrix up to the exposure of underlying reinforcement. However, depending to the released energy, incomplete cleaning or excessive damage may occur. Then, the operating window was experimentally determined. In the second experimental tests, single lap shear tests were performed on samples treated under the most promising process conditions, to verify the laser treatment effectiveness. It was found that the laser treatment, compared to the untreated samples, is able to increase the apparent shear strength up to three times

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Increasing adhesive bonding of carbon fiber reinforced thermoplastic matrix by laser surface treatment

Genna

Leone

Ucciardello

et al. 2017

Polymer Engineering & Sci

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“…The UV irradiation not only accelerated the formation of Ag NPs at room temperature but also significantly improved the particle seeding and avoided the random aggregation. UV irradiation also increases the polymer surface relief and roughness, chemical composition, and wettability [47]. The surface relief and roughness markedly improves the adhesion of metal particles deposited on the surface [48].…”

Section: Optimization Of Synergistic Effect Of Ag@ppy/pcl@ppymentioning

confidence: 99%

“…Note that UV light irradiation may produce well-dispersed silver nanoparticles [46]. The PCL polymer surface with the UV light irradiation can simultaneously change the surface relief and roughness, chemical composition, and wettability [47], which increases the adhesion of metal particles on the polymer surface [48]. In order to better understand the formation mechanism, the systematical morphology and chemical structure characterization of Ag@PPy/PCL@PPy composites has been investigated.…”

Section: Introductionmentioning

confidence: 99%

Reproducible preparation of a stable polypyrrole-coated-silver nanoparticles decorated polypyrrole-coated-polycaprolactone-nanofiber-based cloth electrode for electrochemical sensor application

Wang

Liu

et al. 2015

Nanotechnology

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A piece of conductive cloth has been successfully constructed from polypyrrole-coated silver nanoparticle (Ag@PPy) composites decorated on electrospun polycaprolactone (PCL) nanofibers that formed the core-shell structure of Ag@PPy/PCL@PPy via a photo-induced one-step redox reaction. The photochemical reaction method both accelerated the rate of formation of silver nanoparticles (Ag NPs) and enhanced the dispersion of Ag NPs at the surface of PCL@PPy film. The resulting Ag@PPy/PCL@PPy-based cloth was flexible enough to be cut and pasted onto a glass carbon electrode for the preparation of a biosensor. The resulting biosensor showed good electrochemical activity toward the reduction of H2O2 with low detection limit down to 1 μM (S/N = 3) and wide linear detection ranging from 0.01 mM to 3.5 mM (R(2) = 0.990). This sensor has been applied to detect the trace H2O2 residual in milk. The cloth electrode has been proved to exhibit long-term stability, high selectivity, and excellent reproducibility.

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Investigations on the reactive surface modification of polycarbonate by surface‐reactive injection molding

Nagel

Bräuer

Hupfer

et al. 2004

J of Applied Polymer Sci

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ABSTRACT:A new procedure of surface modification was investigated in which the modification was coupled with the injection molding process. This procedure could save other commonly used surface modification procedures such as flame or plasma treatment. According to the procedure, a reactive modifier was applied to the surface of the mold cavity. On injection of the plastic melt, a chemical reaction took place, which attaches the modifier covalently to the resultant plastic part. In this contribution, conditions are considered for the modification of polycarbonate with poly(vinyl alcohol) and polyethylenimine as modifiers. The reaction in the melt was investigated and the modified surfaces of injection-molded plates were characterized. The surface modification, realized with the new approach, was permanent. It allows for the introduction of special functional groups, which may be useful for further reactive processing stages such as reactive adhesive joining, reactive coating, metallization, or functionalization for special applications.

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Microstructure Characterization of Laser Treated Surfaces

Cited by 7 publications

References 3 publications

Increasing adhesive bonding of carbon fiber reinforced thermoplastic matrix by laser surface treatment

Increasing adhesive bonding of carbon fiber reinforced thermoplastic matrix by laser surface treatment

Reproducible preparation of a stable polypyrrole-coated-silver nanoparticles decorated polypyrrole-coated-polycaprolactone-nanofiber-based cloth electrode for electrochemical sensor application

Investigations on the reactive surface modification of polycarbonate by surface‐reactive injection molding

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