Interlayer formation of diamond-like carbon coatings on industrial polyethylene: Thickness dependent surface characterization by SEM, AFM and NEXAFS

Fischer, Christian B.; Rohrbeck, Magdalena; Wehner, Stefan; Richter, Matthias H.; Schmeißer, Dieter

doi:10.1016/j.apsusc.2013.01.210

Cited by 41 publications

(51 citation statements)

References 39 publications

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“…This is a strong indication for the existence of an interlayer between bioplastic substrate and DLC-coating built during the coating process, where a gradient mixture from pure bioplastic foil to DLC-coating has developed. This phenomenon was observed for polyethylene earlier [15].…”

Section: Dlc/phb Acmentioning

confidence: 59%

“…The trays rotated at 2 rpm about a vertical axis in the center of the chamber during the coating process. As in the case of the process used in [15,16], remaining surface contaminations were removed in a first step by exposure to oxygen plasma for 10 min at about 1 Pa pressure and 200 W RF irradiation power. Then the pure bioplastic foil was exposed to acetylene plasma at 0.65 Pa and 107 W resulting in a deposition rate of 2 nm/min for the used setup.…”

Section: Methodsmentioning

confidence: 99%

“…The coating process was performed as described previously [15,16,[18][19][20][21]. In difference to the setup used in [15,16], here six of the trays at a time were placed onto a turntable in a high vacuum chamber. The trays rotated at 2 rpm about a vertical axis in the center of the chamber during the coating process.…”

Section: Methodsmentioning

confidence: 99%

“…Then the pure bioplastic foil was exposed to acetylene plasma at 0.65 Pa and 107 W resulting in a deposition rate of 2 nm/min for the used setup. The pure bioplastic foil was coated with a more flexible DLC-coating referred to as f-DLC in [15,16]. Deposition time of 50 min maintained a DLC-coating of 100 nm thickness.…”

Section: Methodsmentioning

confidence: 99%

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DLC‐coated pure bioplastic foil

Rohrbeck¹,

Fischer²,

Wehner

et al. 2014

Vak Forsch Prax

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Polymers made of renewable resources increasingly replace conventional plastic materials made of petroleum. Socalled bioplastics can be found e. g. in food industry, for agricultural usage or in the medical field. The range of applications can be further expanded with specialized coating of their surface. Especially in case of food packaging and the usage within medical devices as well as the storage of these composite materials, sterilization or at least the partial reduction of microbial growth is an important issue which needs to be addressed early in the production process. In this work, a commercially available polyhydroxyalkanoate (PHA) pure bioplastic foil of 50 μm thickness was coated with 100 nm of diamond‐like carbon (DLC) and afterwards treated by four different standard methods of sterilization and / or disinfection, namely deep‐freezing, ultraviolet irradiation, autoclaving and immersion in ethanol. The surface morphology of treated DLC‐coated and uncoated samples was investigated and compared to the untreated DLC‐coated and uncoated samples using scanning electron microscopy (SEM) and atomic force microscopy (AFM). Measurements exhibited damage of the composite for autoclaved and in ethanol immersed samples, whereas deep‐frozen and ultraviolet irradiated samples showed no structural changes. These findings clearly demonstrate deep‐freezing and ultraviolet irradiation to be appropriate methods for the disinfection and sterilization, respectively, of the DLC‐coated pure bioplastic foil.

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Section: Dlc/phb Acmentioning

confidence: 59%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

DLC‐coated pure bioplastic foil

Rohrbeck¹,

Fischer²,

Wehner

et al. 2014

Vak Forsch Prax

Self Cite

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“…Diese Variation wird durch eine geänderte Geometrie beim Beschichtungsprozess erreicht. Diese unterschiede sind ausführlich in [14] dargelegt und die resultierenden Schichten werden im weiteren Verlauf als r-DLC und f-DLC bezeichnet. Die robustere r-DLC-Schicht wächst dabei mit etwa 10 nm/min und die flexiblere f-DLC mit ungefähr 2 nm/min auf.…”

Section: Experimentelle Methodenunclassified

Plasmaunterstützte DLC‐Beschichtung von Kunststoffen

Fischer

Bernsmann²,

Ajaj³

et al. 2013

Vak Forsch Prax

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Das Aufwachsen von diamantähnlichem Kohlenstoff (DLC) auf Polyethylene (PE) geht einher mit der Bildung einer Zwischenschicht. Dabei verändert sich die ursprüngliche Oberflächenstruktur des Kunststoffes und geht schrittweise in die ungeordnete Struktur der DLC‐Schicht über. Bevor DLC im Kohlenwasserstoffplasma mittels PECVD‐Methode aufgebracht werden kann, werden alle Substrate unter Verwendung eines Sauerstoffplasmas gereinigt. Dieser erste Teilschritt ist extrem wichtig für das Aufwachsen der DLC‐Schicht, da hierbei die Probenoberfläche bereits abgetragen und teilweise eingeebnet wird. Kunststoffe können durch DLC‐Beschichtung erfolgreich in der Stabilität verbessert und mit zusätzlichen Eigenschaften und neuen Funktionalitäten ausgestattet werden. Erste mikroskopische Erklärungen für die makroskopischen Phänomene und anwendungsrelevante Fragen konnten aufgezeigt werden. Außerdem werden die Grenzen der Machbarkeit thematisiert. Die hier vorgestellten Methoden werden nun auf weitere Materialien und Beschichtungen angewandt.

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The Physics of Packaging Materials

2020

Packaging Technology and Engineering

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Interlayer formation of diamond-like carbon coatings on industrial polyethylene: Thickness dependent surface characterization by SEM, AFM and NEXAFS

Cited by 41 publications

References 39 publications

DLC‐coated pure bioplastic foil

DLC‐coated pure bioplastic foil

Plasmaunterstützte DLC‐Beschichtung von Kunststoffen

The Physics of Packaging Materials

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