A Novel Approach for the Decoration of Parylene C Coatings Using Functional Silica-Triclosan Co-Polymer Nanoparticles Volume 3 - Issue 4

Rina B Binyamini¹, Edith Laux², Herbert Keppner² and Jean Paul Lellouche¹*

• ¹Department of Chemistry, Faculty of Exact Sciences, Institute of Nanotechnology and Advanced Materials (BINA), Bar-Ilan University, Israel
• ²Haute Ecole Arc Ingénierie (HES-SO), CH-2300 La Chaux-de-Fonds, Switzerland

Received: February 23, 2021;   Published: March 03, 2021

*Corresponding author: Jean-Paul Lellouche, Department of Chemistry, Faculty of Exact Sciences, Bar-Ilan University, Ramat Gan 5290002 Israel Institute of Nanotechnology and Advanced Materials (BINA), Bar-Ilan University, Ramat Gan, 5290002, Israel

DOI: 10.32474/MAMS.2021.03.000173

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Abstract

Both pure silica (SiO₂) nanoparticles (SNPs) and functionalized hybrid triclosan (TCS)/silica nanocomposites (T-SNCs) were deposited onto nonfunctional Parylene C films using a novel, readily executed, one-step decoration method. Unlike previously known methods, this functionalization method of Parylene C films required neither any binding agent nor sophisticated equipment/devices. The SiO₂-based NPs anchored onto Parylene C substrates were formed via a common base-catalyzed hydrolytic sol-gel method. Regarding the mechanism, it has been assumed that the SiO₂ phase precursor (Si(OC₂H₅)₄), tetraethoxysilane (TEOS), was first adsorbed and 2D polymerized onto the parylene C film due to hydrophobic interactions that served as an anchor mechanism for further corresponding NPs growth [1] This assumption was investigated by comparing thermal behaviors (measured by differential scanning calorimetry, DSC) of parylene C coatings before and after the following specific surface treatment, i.e., first (i) first parylene C coating incubation with TEOS, followed by (ii) SNPs formation and growth from such a TEOS-modified coating surface. Following the same procedure, hybrid thiophene-containing H-SiO₂-TCS NPs were also successfully grown from the surface of a same TEOS-modified parylene C film and characterized using high resolution scanning electron microscopy (HR-SEM) and X-ray photoelectron spectroscopy (XPS). In order to obtain deeper insight into the overall functionalization process, the similar hybrid H-SiO₂-TCS NPs that formed in the bulk-contacting medium were also isolated and fully characterized for comparison needs. Resulting anti-bacterial biological experiments were also performed as well.

Keywords: Silica nanoparticles; hybrid silica/thiophene nanoparticles; functional parylene c coatings; hybrid silicaperylene c composites; antibacterial parylene c coatings

Abstract| Introduction| Experimental Section| Biological Results| Conclusion Acknowledgements| References|