Effect of Surface Modification by Ammonia Plasma on Vascular Graft: PET Film and PET Scaffold

• Authors: M. Öteyaka , P. Chevallıer , L. Robıtaılle , G. Laroche
• Languages of publication: EN

Abstracts

EN

Nowadays, poly (ethylene terephthalate) (PET) textiles, either knitted or woven, are largely used as substitutes for replacement of medium and large calibre (10-40 mm) arteries. Unfortunately, these substitutes do not perform well when they are used to replace small diameter arteries due to thrombogenicity and compliance mismatch issues. Surface treatments were often used as the first step to solve thrombogenicity issues. For example, low pressure ammonia plasma processes can provide modification of the top ≈ 10 - 50 Å of polymer surface without affecting bulk properties of materials. This work compared ammonia plasma surface modifications of PET film (flat surface) and PET scaffolds (porous surface). Plasma treatments lead to a higher amount of nitrogen as well as amino groups on scaffolds compared to films. N/C maximum was reached for PET film and scaffold after plasma treatments of 5 s and 100 s, respectively. Highest amine concentration on films and scaffolds were obtained at short treatment time, specifically 1 s. In addition, high resolution spectra of C 1s confirmed that amino groups were mainly grafted on aromatic rings. Nodule formation was observed after plasma treatment with atomic force microscopy. Their size and shape increased with longer treatment time.

Keywords

EN

52.40.-w; 52.77.Bn; 52.77.Fv; 52.80.Pi

Discipline

• 52.40.-w: Plasma interactions (nonlaser)
• 52.77.Fv: High-pressure, high-current plasmas (plasma spray, arc welding, etc.)(see also 81.15.Rs Spray coating techniques)
• 52.77.Bn: Etching and cleaning(see also 81.65.Cf Surface cleaning, etching, patterning in surface treatments)
• 52.80.Pi: High-frequency and RF discharges

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2012
• Volume: 121
• Issue: 1
• Pages: 125-127

Dates

published

2012-01

Contributors

author

M. Öteyaka

• Dumlupınar Üniversitesi, Mühendislik Fakültesi, Makine Bölümü, Merkez Kampüs, Kütahya, Turkey

author

P. Chevallıer

• Surface Engineering Laboratory, Department of Mining, Metallurgical, and Materials Engineering, Université Laval, Laval, Quebec, G1K 7P4, Canada

author

L. Robıtaılle

• Industrial Materials Institute, National Research Council Canada, Boucherville, QC, Canada

author

G. Laroche

• Surface Engineering Laboratory, Department of Mining, Metallurgical, and Materials Engineering, Université Laval, Laval, Quebec, G1K 7P4, Canada

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Identifiers

DOI

10.12693/APhysPolA.121.125