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Your search keyword '"Galli, Giancarlo"' showing total 18 results
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18 results on '"Galli, Giancarlo"'

3. Novel Strategy For Tailoring Of Sio2 And Tio2 Nanoparticle Surfaces With Poly(Epsilon-Caprolactone)

Author

Karagoz, Bunyamin, Galli, Giancarlo, Durmaz, Hakan, Hizal, Gurkan, Tunca, Umit, and Bicak, Niyazi

Abstract

A novel strategy was developed for tailoring of SiO2 and TiO2 nanoparticle surfaces with poly(epsilon-caprolactone) (PCL). Thus, a self-curable polyester, poly(2-hydroxypropylene maleate) was adsorbed on the nanoparticle surfaces and heated to 180 A degrees C to give a cross-linked polyester layer with residual hydroxyalkyl groups on their surfaces. Surface-initiated polymerization of epsilon-caprolactone from hydroxyalkyl groups on the surfaces yielded core-shell nanoparticles with cross-linked core and PCL shells (22.2-71.4%). The organic shell layers around the nanoparticle cores were evidenced by transmission electron microscopy, dynamic light scattering, and thermogravimetric analyses techniques. The core-shell nanoparticles were then employed in preparing the stable and the homogenous dispersions with poly(methyl methacrylate-stat-butyl acrylate) solutions. An application of the solutions onto glass substrates yielded uniform and nearly transparent free standing films (40-60 mu m) with good homogeneity as inferred from scanning electron microscopy pictures.

Published
2010

18. Non-Biofouling Fluorinated Block Copolymer Coatings for Contact Lenses

Author

Elisa Martinelli, Giancarlo Galli, Monica Bianco, Giuseppe Maruccio, Giancarlo Montani, Valentina Arima, Vita Guarino, Rosaria Rinaldi, Bianco, Monica, Guarino, Vita, Maruccio, Giuseppe, Galli, Giancarlo, Martinelli, Elisa, Montani, Giancarlo, Rinaldi, Rosaria, and Arima, Valentina

Subjects
Protein Adsorption, Contact Lenses, Contact Angle, Atomic Force Microscopy, Quartz Crystal Microbalance, Biofouling, Materials science, Copolymer, General Materials Science, Composite material
Abstract

Films of two fluorinated block copolymers (P(S81-Sz6) and P(S81-Sz11)) were investigated and compared with those of a commercial Teflon-like polymer (PTFE-AF) in the search for novel non-biofouling coatings able to minimize the amount of tear fluid (TF) proteins absorbed on contact lens (CL) surfaces. The adsorption of a solution containing lysozyme, albumin and immunoglobulin G (mimicking the TF composition) on the fluorinated block copolymers was evaluated using a quartz crystal microbalance. P(S81-Sz11) was found to resist protein adsorption more effectively than P(S81-Sz6) and PTFE-AF. The different interaction of P(S81-Sz6) and P(S81-Sz11) with the artificial TF was attributed to creation of a more heterogeneous and moderately hydrophobic surface of the latter polymer film by dynamic contact angle and atomic force microscopy studies. Moreover, deposition of P(S81-Sz11) on a CL-like silicone (PDMS) and a CL thin films demonstrated a protein adsorption reduction of up to 70% relative to pristine PDMS and commercial CL thin films.

Published
2015
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