Polyaniline coated core-shell polyacrylates: Control of film formation and coating application for corrosion protection
作者： Paula T. Bertuoli , Alessandra F. Baldissera , Ademir J. Zattera , Carlos A. Ferreira , Carlos Alemán
DOI: 10.1016/J.PORGCOAT.2018.12.007
关键词:
摘要: Abstract Aqueous polymer colloidal nanoparticles, composed by poly(methyl metacrylate), butyl acrylate, and acrylic acid, as “core” (P(MMA/BA/AA)); polyaniline (PAni) doped with dodecylbenzenesulfonic acid (DBSA), “shell”, were prepared. The complete synthesis consisted of two-steps. In the first step P(MMA/BA/AA) particles obtained in a semi-continuous process free radical emulsion polymerization, followed second where chemical oxidative polymerization aniline monomers upper surfaces occurred. Transmission electron microscopy images (TEM) dinamic light scattering (DLS) confirmed obtaining spherical which are stable for further solid film preparation coatings metal protection. films characterized FTIR, Raman, UV–vis, X-Ray photoelectron spectroscopy (XPS), differential scanning calorimetry (DSC), thermogravimetry (TGA), optical (SEM), static contact angle, mechanical properties water absorption. protection was evaluated after check adhesion impedance parameters. presence low concentration PAni-DBSA (3 wt. %) on altered hydrophilicity uptake without affecting capability passive layers phosphatized carbon steel surface against corrosion, even almost 20 days immersion NaCl aggressive solutions.
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