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Synthesis and characterization of eco‐friendly siloxane‐semifluorinated polyurethane coatings for underwater application
Author(s) -
Yesudass Sebastin Anthony,
Mohanty Smita,
Nayak Sanjay K.
Publication year - 2019
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.47720
Subject(s) - siloxane , polyurethane , polyol , materials science , isocyanate , coating , polydimethylsiloxane , polymer chemistry , surface energy , prepolymer , chemical engineering , composite material , polymer , engineering
Siloxane‐semifluorinated polyurethane coatings were prepared for robust underwater application. Initially, acrylic polyol (FS‐GPTACP)‐containing fluoroalkoxysilane (1H,1H,2H,2H‐Perfluorooctyltrimethoxysilane) pendant group was synthesized by the free‐radical polymerization method. Different weight percentages of polydimethylsiloxane (0, 10, and 20 wt %) were added to the polyol to tune the mechanical and the surface energy of the coating. Subsequently, this polyol mixture was cured with 4, 4′‐methylenebis(cyclohexyl isocyanate) (H 12 MDI) to prepare a series of siloxane‐semifluorinated polyurethane–urea hybrid coatings (APUS 0%, APUS 10%, and APUS 20%). The synthesized coating showed low surface energy, hydrophobicity with exceptional water, and alkali resistance. Moreover, the coating displayed excellent mechanical properties with low pseudobarnacle adhesion strength. The coatings also showed nontoxicity against gram‐positive and gram‐negative bacterial strains. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 47720.