Ultra-short pulsed laser ablation of polymers

Serafetinides, A. A.; Makropoulou, M.; Skordoulis, Constantine; Kar, A. K.

doi:10.1016/s0169-4332(01)00324-5

Cited by 65 publications

(43 citation statements)

References 20 publications

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“…Therefore, this is a clean process, leaving no recast material and eliminating the need of post-processing steps [31]. Patterns in biomedical polymers can be produced in the UV-IR spectral range, using continuous-wave (CW) or pulsed laser radiation [32,33]. Influence of the processing parameters, their effects, and theoretical modeling is complex.…”

Section: Process Fundamentalsmentioning

confidence: 99%

Laser Surface Texturing of Polymers for Biomedical Applications

et al. 2018

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Polymers are materials widely used in biomedical science because of their biocompatibility, and good mechanical properties (which, in some cases, are similar to those of human tissues); however, these materials are, in general, chemically and biologically inert. Surface characteristics, such as topography (at the macro-, micro, and nano-scale), surface chemistry, surface energy, charge, or wettability are interrelated properties, and they cooperatively influence the biological performance of materials when used for biomedical applications. They regulate the biological response at the implant/tissue interface (e.g., influencing the cell adhesion, cell orientation, cell motility, etc.). Several surface processing techniques have been explored to modulate these properties for biomedical applications. Despite their potentials, these methods have limitations that prevent their applicability. In this regard, laser-based methods, in particular laser surface texturing (LST), can be an interesting alternative. Different works have showed the potentiality of this technique to control the surface properties of biomedical polymers and enhance their biological performance; however, more research is needed to obtain the desired biological response. This work provides a general overview of the basics and applications of LST for the surface modification of polymers currently used in the clinical practice (e.g., PEEK, UHMWPE, PP, etc.). The modification of roughness, wettability, and their impact on the biological response is addressed to offer new insights on the surface modification of biomedical polymers.

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Section: Process Fundamentalsmentioning

confidence: 99%

Laser Surface Texturing of Polymers for Biomedical Applications

et al. 2018

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“…In terms of the laser pulse duration, both ultra-short (femtosecond [13], and picosecond [14]), as well as long (microsecond) or continuous operation lasers [8][9][10][11][12] can be utilized. The main motivation for the use of ultra-short pulses is the reduction of the heat-affected zone HAZ due to the shorter duration of the heat source, or the improvement of light absorption resulting from nonlinear effects such as multiphoton absorption [15].…”

Section: Introductionmentioning

confidence: 99%

“…There are many scientific articles presenting laser processing of various neat polymers (without fillers): for example polytetrafluoroethylene [8,14], polyethylene [5,9,10], polycarbonate [3,[9][10][11], PMMA [3,7,10,11], polyetheretherketone [3,14], as well as fiber-reinforced polymers [12,17], but there is still a lack of information on nylon grooving properties through vaporization by infrared lasers.…”

Section: Introductionmentioning

confidence: 99%

The influence of organobentonite clay on CO2 laser grooving of nylon 6 composites

Antończak

Nowak

Szustakiewicz

et al. 2013

Int J Adv Manuf Technol

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The popular polycaprolactam (polyamide PA6), commonly referred to as nylon 6, widely used as a construction plastic, is not a typical material for micromachining by CO 2 laser vaporization. In this paper, we describe investigations of the pulsed CO 2 laser grooving of both the chemically pure and the organobentonite clay modified nylon 6. Our results indicate that doping of nylon 6 with nanoparticles of organophilized bentonite significantly improves the grooving ability, predictability of the process, and its quality. In order to determine the nature of the changes in the depth and width of the grooves as a function of the laser process parameters, theoretical modeling of the laser grooving of nylon was carried out. The basic parameters of the laser grooving process versus laser beam intensity, pulse repetition rate, scanning speed of the material and various compositions of the organophilized bentonite dopant are presented. Additionally, an example of a three-dimensional engraving/milling of tested materials as well as the impact of doping on the channel profile are examined. The modification of nylon 6 by appropriate doping with bentonite clay radically improves the quality of micromachining with a CO 2 laser.

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“…There have also been many studies of laser processing on polymers. Serfetinides et al (2001) reported the experimental results of the ablation rate per pulse as a function of the laser fluence and images of the surface morphology for several organic polymer materials. Pham et al (2002) investigated the relationship between ablation rates and various polymer thermal properties.…”

Section: Introductionmentioning

confidence: 99%