The Application of Radio Frequency Magnetron Sputtering for Fluoropolymer Surface Modification

Abstract:

The paper investigated the properties of the multilayer system: metal with polymer layer modified by radio frequency magnetron sputtering of a solid target made from hydroxyapatite. The material of the polymer layer is thermoplastic copolymer of tetrafluoroethylene with vinylidene fluoride. The roughness parameters of metal, polymer, and hybrid substrates are determined using atomic-force microscope. Calcium phosphate coatings increase the surfaces roughness of polymer and metal materials, thus presenting a stimulating factor for the attachment and proliferation of osteogenic cells. Wettability of the coatings was investigated by the “sit” drop method of the “Krüss Easy Drop” installation by measuring the effective contact angle. The hydrophobic polymer surface becomes hydrophilic after modification and the surface free energy increases.

• Periodical: Advanced Materials Research (Volume 1040)
• Pages: 790-794
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1040.790
• Online since: September 2014
• Authors: Alena I. Malchikhina, Evgeny N. Bolbasov, Sergei I. Tverdokhlebov*
• Keywords: Copolymer of Tetrafluoroethylene, Copolymer of Vinylidene Fluoride, Free Surface Energy, Magnetron Sputtering, Surface Roughness (SR), Thin Calcium-Phosphate Coatings, Wettability

References

[1] L.I. Kravets, S.N. Dmitriev, A.B. Gil'man, Modification of Properties of Polymer Membranes by Low-Temperature Plasma Treatment, High Ener. Chem., 43 (2009) 181–188.

DOI: 10.1134/s0018143909030059

[2] H. Mahjoubi, S. Abdollahi, M. Cerruti, Surface Modification of Biodegradable Polyesters for Soft and Hard Tissue Regeneration, Thin Films and Coatings in Biology, Biological and Medical Physics, Biomedical Engineering (2013) 229-263.

DOI: 10.1007/978-94-007-2592-8_7

[3] T. Jacobs, R. Morent, N. De Geyter, P. Dubruel, C. Leys, Plasma Surface Modification of Biomedical Polymers: Influence on Cell-Material Interaction, Plasma Chem Plasma Process 32 (2012) 1039–1073.

DOI: 10.1007/s11090-012-9394-8

[4] S. Yoshida, K. Hagiwara, T. Hasebe, A. Hotta, Surface modification of polymers by plasma treatments for the enhancement of biocompatibility and controlled drug release, Surface and Coatings Technology, 233 (2013) 99-107.

DOI: 10.1016/j.surfcoat.2013.02.042

[5] A.P. Kharitonov, G.V. Simbirtseva, A. Tressaud, E. Durand, C. Labrugère, M. Dubois, Comparison of the surface modifications of polymers induced by direct fluorination and rf-plasma using fluorinated gases, Journal of Fluorine Chemistry, 165 (2014).

DOI: 10.1016/j.jfluchem.2014.05.002

[6] N. De Geyter, R. Morent, Cold plasma surface modification of biodegradable polymer biomaterials, In Biomaterials for Bone Regeneration, edited by P. Dubruel, S.V. Vlierberghe, Woodhead Publishing, chapter 7 (2014) 202-224.

DOI: 10.1533/9780857098104.2.202

[7] A.M. Aronov, V.F. Pichugin, E.V. Eshenko, M.A. Ryabtseva, R.A. Surmenev, S.I. Tverdokhlebov, E.V. Shesterikov, Thin calcium-phosphate coatings produced by RF magnetron sputtering and prospects for their use in biomedical engineering, Biomed. Eng. 42 (2008).

DOI: 10.1007/s10527-008-9029-9

[8] K. Owens, R.C. Wendt, Estimation of surface free energy of polymers, J. Appl. Polym. Sci. 13 (1969) 1741D-1747D.

[9] D. Janssen, R. Palma, S. Verlaak, P. Heremans, W. Dehaen, Static solvent contact angle measurements, surface free energy and wettability determination of various self-assembled monolayers on silicon dioxide, Thin Solid Films. 515 (2006) 1433-1438.

DOI: 10.1016/j.tsf.2006.04.006

[10] R.Z. LeGeros, Calcium phosphate-based osteoinductive materials, Chem. l Rev. 108 (2008) 4742-4753.

DOI: 10.1021/cr800427g