Issue 11, 2011

Surface modification of poly(ethylene-co-acrylic acid) with amino-functionalized silicananoparticles

Abstract

In this work we studied the possibility to achieve a hybrid-surface through the modification, via a facile wet chemical process, of the surface of films of poly(ethylene-co-acrylic acid) (EAA) with amino-modified silica nanoparticles. Films of EAA were preliminarily activated by the introduction of –COCl groups on their surface. Silica nanoparticles were thereafter covalently bound on the polymeric surface as confirmed by FTIR, ATR-FTIR, XPS, NMR and SEM determinations. The nanoparticles formed a multilayer on the film surface and covered almost uniformly the whole film surface. Direct measurements of superficial amino groups by titration allowed us to detect a concentration of about 18 nmol cm−2. The presence of this uniform layer of nanoparticles bearing polar groups strongly changed the wettability of the material as confirmed by static contact angle measurements that passed from 87° of the neat EAA to about 30° of the amino-functionalized silica nanoparticles modified material.

Graphical abstract: Surface modification of poly(ethylene-co-acrylic acid) with amino-functionalized silica nanoparticles

Article information

Article type
Paper
Submitted
01 Oct 2010
Accepted
07 Dec 2010
First published
24 Jan 2011

J. Mater. Chem., 2011,21, 3849-3857

Surface modification of poly(ethylene-co-acrylic acid) with amino-functionalized silica nanoparticles

R. Scaffaro, L. Botta, G. Lo Re, R. Bertani, R. Milani and A. Sassi, J. Mater. Chem., 2011, 21, 3849 DOI: 10.1039/C0JM03310C

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