Mechanical characterization of a-C:H:SiOx coatings synthesized using radio-frequency plasma-assisted chemical vapor deposition method

Batory, D.; Jędrzejczak, Anna; Szymański, W.; Niedzielski, P.; Fijalkowski, Mateusz; Louda, Petr; Kotela, Ireneusz; Hromadka, M.; Musil, J.

doi:10.1016/j.tsf.2015.08.017

Cited by 58 publications

(22 citation statements)

References 44 publications

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“…The presence of oxygen was attributed to the surface oxidation. This process was also observed by Batory et al [32]. The confirmation of this fact was by the presence of the Si-O atomic groups in the IR spectra as well as the highest range of surface hardness for obtained Si-DLC layers (the tested PE_4 sample, vide infra Figure 3 and see Section 3.4).…”

Section: Morphological Analysissupporting

confidence: 79%

Physicochemical and Biological Activity Analysis of Low-Density Polyethylene Substrate Modified by Multi-Layer Coatings Based on DLC Structures, Obtained Using RF CVD Method

et al. 2018

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In this paper, the surface properties and selected mechanical and biological properties of various multi-layer systems based on diamond-like carbon structure deposited on low-density polyethylene (LDPE) substrate were studied. Plasma etching and layers deposition (incl. DLC, N-DLC, Si-DLC) were carried out using the RF CVD (radio frequency chemical vapor deposition) method. In particular, polyethylene with deposited N-DLC and DLC layers in one process was characterized by a surface hardness ca. seven times (up to ca. 2.3 GPa) higher than the unmodified substrate. Additionally, its surface roughness was determined to be almost two times higher than the respective plasma-untreated polymer. It is noteworthy that plasma-modified LDPE showed no significant cytotoxicity in vitro. Thus, based on the current research results, it is concluded that a multilayer system (based on DLC coatings) obtained using plasma treatment of the LDPE surface can be proposed as a prospective solution for improving mechanical properties while maintaining biocompatibility.

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Section: Morphological Analysissupporting

confidence: 79%

Physicochemical and Biological Activity Analysis of Low-Density Polyethylene Substrate Modified by Multi-Layer Coatings Based on DLC Structures, Obtained Using RF CVD Method

et al. 2018

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“…The hardness decreased and the transmittance increased as the HMDSO flow rate increased. Similar results were also reported by Batory et al [40]. Figure 7 presents the XPS relative atomic contents of C, Si, and O.…”

Section: The Transparent Very Thin Sio X :Dlc Filmssupporting

confidence: 87%

Fabrication of Transparent Very Thin SiOx Doped Diamond-Like Carbon Films on a Glass Substrate

Liao

Wei

et al. 2018

Coatings

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A novel direct current (DC) magnetron sputtering system via radio frequency (RF) bias with hexamethyldisiloxane (HMDSO) plasma polymerization was developed for the deposition of SiO x-doped diamond-like carbon (DLC) films on a glass substrate. As the RF bias increased, the ratio of intensity of D peak and G peak (I(D)/I(G)) decreased and the G peak shifted to a low position, leading to high hardness and a large portion of sp 3 bonds. Additionally, weak sp 2 graphite bonds were broken and sp 3 diamond bonds formed because the RF bias attracted hydrogen ion bombarding the DLC films. Increasing DC power was helpful to improve the hardness of the DLC films because the proportion of sp 3 bonds and the I(D)/I(G) ration was increased. HMDSO was introduced into this process to form SiO x :DLC films with enhanced optical performance. The average transmittance in the visible region of these very thin SiO x :DLC films with a thickness of 37.5 nm was 80.3% and the hardness of the SiO x :DLC films was increased to 7.4 GPa, which was 23.3% higher than that of B270 substrates.

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“…The peak at approximately 1,270 cm −1 corresponds to Si-(CH 3 ) x groups. [28] Two peaks at 1,375 and 1,456 cm −1 belong to CH 3 groups in PP. [29] The wide peak at 1,560-1,760 cm −1 corresponds to stretching vibrations of conjugated carbonyl (C O) bonds and is observed in the absorption spectra of SiO x -incorporated DLC coatings.…”

Section: F I G U R Ementioning

confidence: 99%

Stability of a‐C:H:SiO_x coating on polypropylene to chemical sterilization

Grenadyorov

Solovyev

Малащенко

et al. 2020

J of Applied Polymer Sci

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Polypropylene (PP) is traditionally used in the production of medical devices, such as catheters, dialyzers, syringes due to its good chemical and thermal resistance, biocompatibility, and low cost. Sterilization can however damage these devices, when the polymer additive releases into physiological fluids, thereby harming the patient health. This article proposes to deposit biocompatible a‐C:H:SiOx coatings onto PP surfaces and studies the coating stability after chemical sterilization. Five different chemical sterilizers, namely, hydrogen peroxide, ethanol, miramistin, formaldehyde, and ethylene oxide are used to compare their effect on the coating stability on the PP substrate. Untreated and sterilized samples are incubated in a liquid synthetic nutrient to obtain extracts that are used for sterility testing and determining the degree of interaction of samples with the nutrient medium. The changes in the coating functional groups and surface morphology are examined by using the Fourier transform infrared spectroscopy and the scanning electron microscopy, respectively. It is shown that the a‐C:H:SiOx coating has a protective effect on the PP substrates subjected to chemical sterilization. The experiment results clearly showed that the ethanol sterilization causes the most serious changes in the structure of PP, and also leads to the barrier coating failure. On the other hand, ethylene oxide sterilization has a minimal effect on the structure of both uncoated and coated PP substrates.

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Mechanical characterization of a-C:H:SiOx coatings synthesized using radio-frequency plasma-assisted chemical vapor deposition method

Cited by 58 publications

References 44 publications

Physicochemical and Biological Activity Analysis of Low-Density Polyethylene Substrate Modified by Multi-Layer Coatings Based on DLC Structures, Obtained Using RF CVD Method

Physicochemical and Biological Activity Analysis of Low-Density Polyethylene Substrate Modified by Multi-Layer Coatings Based on DLC Structures, Obtained Using RF CVD Method

Fabrication of Transparent Very Thin SiOx Doped Diamond-Like Carbon Films on a Glass Substrate

Stability of a‐C:H:SiO_x coating on polypropylene to chemical sterilization

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Mechanical characterization of a-C:H:SiOx coatings synthesized using radio-frequency plasma-assisted chemical vapor deposition method

Cited by 58 publications

References 44 publications

Physicochemical and Biological Activity Analysis of Low-Density Polyethylene Substrate Modified by Multi-Layer Coatings Based on DLC Structures, Obtained Using RF CVD Method

Physicochemical and Biological Activity Analysis of Low-Density Polyethylene Substrate Modified by Multi-Layer Coatings Based on DLC Structures, Obtained Using RF CVD Method

Fabrication of Transparent Very Thin SiOx Doped Diamond-Like Carbon Films on a Glass Substrate

Stability of a‐C:H:SiOx coating on polypropylene to chemical sterilization

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Stability of a‐C:H:SiO_x coating on polypropylene to chemical sterilization