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Article Dans Une Revue Nanotechnology Année : 2022

Atomic force microscopy characterization of polyethylene terephthalate grafting with poly(styrene sulfonate)

Résumé

Polyethylene terephthalate (PET) is widely used to elaborate biomaterials and medical devices in particular for long-term implant applications but tuning their surface properties remains challenging. We investigate surface functionalization by grafting poly(sodium 4styrene sulfonate, PNaSS) with the aim of enhancing protein adhesion and cellular activity. 2 Elucidating the topography and molecular level organization of the modified surfaces is important for understanding and predicting biological activity. In this work, we explore several grafting methods including thermal grafting, thermal grafting in the presence of Mohr's salt, and UV activation. We characterize the different surfaces obtained using atomic force microscopy (AFM), contact angle (CA), and X-ray photoelectron spectroscopy (XPS). We observe an increase in the percentage of sulfur atoms (XPS) that correlates with changes in (CA), and we identify by AFM characteristic features, which we interpret as patches of polymers on the PET surfaces. This work demonstrates tuning of biomaterials surface by functionalization and illustrates the capability of atomic force microscopy to provide insights into the spatial organization of the grafted polymer.
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Dates et versions

hal-03560348 , version 1 (07-02-2022)

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Tuan Ngoc Nguyen, Vincent Humblot, Veronique Migonney, Raphaël Lévy. Atomic force microscopy characterization of polyethylene terephthalate grafting with poly(styrene sulfonate). Nanotechnology, 2022, ⟨10.1088/1361-6528/ac50ef⟩. ⟨hal-03560348⟩
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