Laser-induced ablative amorphization of montmorillonite

Duchek, Petr; Urbanová, Markéta; Pokorná, Dana; Kupčı́k, Jaroslav; Šubrt, Ján; Pola, Josef

doi:10.1016/j.jnoncrysol.2012.08.010

Cited by 5 publications

(3 citation statements)

References 32 publications

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“…We note that laser induced amorphization of OMMT may occur under certain conditions as reported in Ref. 25 . No investigation was performed in this current work on whether such amorphization has occurred in our system.…”

Section: Articlesupporting

confidence: 61%

Clay Dispersion Effects on Excimer Laser Ablation of Polymer-Clay Nanocomposites

Chang

Sancaktar

2011

Volume 11: Nano and Micro Materials, Devices and Systems; Microsystems Integration

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The ablation behavior of polystyrene-organically modified montmorillonite (OMMT) nanocomposites was evaluated by measuring the weight loss induced by KrF excimer laser irradiation of the nanocomposite specimens under air atmosphere. The characteristic values of ablation, ablation threshold fluence, and effective absorption coefficient for polystyrene and its nanocomposites were calculated based on the weight loss data. The effects of morphology due to spatial variation in injection molded samples are also discussed in this article. Results demonstrate that both the dispersion state and the concentration of clay play important roles in excimer laser ablation. The sensitivity of threshold fluence and absorption coefficient to dispersion state of OMMT seem to depend on the clay concentration.

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Section: Articlesupporting

confidence: 61%

Clay Dispersion Effects on Excimer Laser Ablation of Polymer-Clay Nanocomposites

Chang

Sancaktar

2011

Volume 11: Nano and Micro Materials, Devices and Systems; Microsystems Integration

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“…We note that laser induced amorphization of OMMT may occur under certain conditions as reported in Ref. . No investigation was performed in this current work on whether such amorphization has occurred in our system.…”

Section: Resultsmentioning

confidence: 58%

Clay dispersion effects on excimer laser ablation of polymer–clay nanocomposites

Chang

Sancaktar

2013

J of Applied Polymer Sci

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The ablation behavior of polystyrene‐organically modified montmorillonite (OMMT) nanocomposites was evaluated by measuring the weight loss induced by KrF excimer laser irradiation of the nanocomposite specimens under air atmosphere. The characteristic values of ablation, ablation threshold fluence, and effective absorption coefficient for polystyrene and its nanocomposites were calculated based on the weight loss data. The effects of morphology due to spatial variation in injection molded samples are also discussed in this article. Results demonstrate that both the dispersion state and the concentration of clay play important roles in excimer laser ablation. The sensitivity of threshold fluence and absorption coefficient to dispersion state of OMMT seem to depend on the clay concentration. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 2336–2344, 2013

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“…MMT is an inorganic clay material, with the unique layer-shaped one-dimensional nanostructure properties, a designable layer reactivity, large surface area, and good cation exchange capacity. , Because of the advantages including the excellent mechanical properties, gas barrier and flame retardant performance, low cost, and processing convenience, MMT has been widely used in textile, adsorption materials, coatings, pharmaceuticals, and other industries. − Duchek et al studied the structural and performance changes of MMT after the infrared laser irradiation and found that the laser-induced process led to the complete amorphization of MMT particles and different morphologies depending on the laser energy. This laser-induced property will be helpful for making clay nanocomposites and nanostructure clay films.…”

Section: Introductionmentioning

confidence: 99%

Surface Laser-Marking and Mechanical Properties of Acrylonitrile-Butadiene-Styrene Copolymer Composites with Organically Modified Montmorillonite

Zhang

et al. 2020

ACS Omega

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In this study, organically modified montmorillonite (OMMT) was prepared by modifying MMT with a cationic surfactant cetyltrimethylammonium bromide (CTAB). The obtained OMMT of different loading contents (1, 2, 4, 6, and 8 wt %) was melt-blended with poly(acrylonitrile- co -butadiene- co -styrene) (ABS) to prepare a series of ABS/OMMT composites, which were laser marked using a neodymium-doped yttrium aluminum garnet (Nd:YAG) laser beam of 1064 nm under different laser current processes. X-ray diffraction (XRD), color difference spectrometer, optical microscope, water contact angle tests, scanning electron microscope (SEM), and Raman spectroscopy were carried out to characterize the morphology, structure, and properties of the laser-patterned ABS composites. The effects of the addition of OMMT and the laser marking process on the mechanical properties of ABS/OMMT composites were investigated through mechanical property tests. The results show that the obtained ABS/OMMT composites have enhanced laser marking performance, compared to the ABS. When the OMMT content is 2 wt % and the laser current intensity is 9 A, the marking on ABS composites has the highest contrast (Δ E = 36.38) and sharpness, and the quick response (QR) code fabricated can be scanned and identified with a mobile app. SEM and water contact angle tests showed that the holes, narrow cracks, and irregular protrusion are formed on the composite surface after laser marking, resulting in a more hydrophobic surface and an increased water contact angle. Raman spectroscopy and XRD indicate that OMMT can absorb the near-infrared laser energy, undergo photo thermal conversion, and cause the pyrolysis and carbonization of ABS to form black marking, and the crystal structure itself does not change significantly. When the 2 wt % of OMMT is loaded, the tensile strength, elongation at break, and impact strength of ABS/OMMT are increased by 15, 20, and 14%, respectively, compared to ABS. Compared with the unmarked ABS/OMMT, the defects including holes and cracks generated on the surface of the marked one lead to the decreased mechanical property. The desirable combination of high contrast laser marking performance and mechanical properties can be achieved at an OMMT loading content of 2 wt % and a laser current intensity of 9 A. This research work provides a simple, economical, and environmentally friendly method for laser marking of engineering materials such as ABS.

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Laser-induced ablative amorphization of montmorillonite

Cited by 5 publications

References 32 publications

Clay Dispersion Effects on Excimer Laser Ablation of Polymer-Clay Nanocomposites

Clay Dispersion Effects on Excimer Laser Ablation of Polymer-Clay Nanocomposites

Clay dispersion effects on excimer laser ablation of polymer–clay nanocomposites

Surface Laser-Marking and Mechanical Properties of Acrylonitrile-Butadiene-Styrene Copolymer Composites with Organically Modified Montmorillonite

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