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

1
Faculty of Materials Science and Ceramics, AGH University of Science and Technology, A. Mickiewicza Av. 30, 30 059 Kraków, Poland
2
Department of Technologies and Materials, Faculty of Mechanical Engineering, Technical University in Kosice, Masiarska 74, 040 01 Kosice, Slovakia
3
Institute of Materials Science and Engineering, Łódz University of Technology, Stefanowskiego Str. 1/15, 90 924 Łódz, Poland
4
Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30 387 Kraków, Poland
*
Author to whom correspondence should be addressed.
Coatings 2018, 8(4), 135; https://doi.org/10.3390/coatings8040135
Received: 6 March 2018 / Revised: 31 March 2018 / Accepted: 5 April 2018 / Published: 10 April 2018
(This article belongs to the Special Issue Functional Ceramic Coatings)
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Abstract

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. View Full-Text
Keywords: LDPE; RF CVD; doped DLC structure; wettability; biocompatibility LDPE; RF CVD; doped DLC structure; wettability; biocompatibility
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Kyzioł, K.; Oczkowska, J.; Kottfer, D.; Klich, M.; Kaczmarek, Ł.; Kyzioł, A.; Grzesik, Z. Physicochemical and Biological Activity Analysis of Low-Density Polyethylene Substrate Modified by Multi-Layer Coatings Based on DLC Structures, Obtained Using RF CVD Method. Coatings 2018, 8, 135.

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