Metallized polyimide films for biomedical applications: X‐ray photoelectron spectroscopy, surface tension, and blood compatibility studies. Issue 3 (18th January 2022)

• Record Type: Journal Article
• Authors: Nica, Simona Luminita; Hulubei, Camelia; Popovici, Dumitru; Dobromir, Marius
• Is Part Of: Polymer engineering & science. Volume 62:Issue 3(2022)
• Page Start: 648
• Page End: 663
• Publication Date: 2022-01-18
• Subjects: hemocompatibility -- plasma -- polyimides -- wettability -- XPS; Polymer engineering -- Periodicals; Polymers -- Periodicals; 668.9
• DOI: 10.1002/pen.25872
• Languages: English
• ISSNs: 0032-3888

Abstract

Abstract: The implications of nitrogen plasma exposure of a semi‐aromatic polyimide (PI) and a fully aromatic one, was studied in regard to gold adhesion for biomedical purposes. The hydrophobicity of the analyzed PI films, estimated by the contact angle method, was influenced by both plasma treatment and gold sputtering. Comparative evaluation of the chemical binding states and surface chemical composition was determined by X‐ray photoelectron spectroscopy (XPS) for pristine, plasma treated, and metallized PI films. The appearance of the polar functional groups upon plasma exposure facilitates binding of the gold on the PI surface. Hemocompatibility was theoretically evaluated based on surface tension data. The observed characteristics of the metallized samples could be useful for making components for blood contacting devices, such as blood pressure or blood glucose detection. Abstract : Gold was deposited on the surface of two polyimide substrates in view of biomedical application as blood contacting devices. Molecular simulations indicated that semi‐aromatic polyimide PI‐DOCDA has a twisted structure. The effect of plasma treatment significantly influenced the gold metallization of these polymers.