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Bio-inspired polymers for the functionalization of industrial steel surfaces

Authors
Publisher
University of Liège (ULg), ​Liège, ​​Belgium
Publication Date
Keywords
  • Coating
  • Physical
  • Chemical
  • Mathematical & Earth Sciences :: Chemistry [G01]
  • Physique
  • Chimie
  • Mathématiques & Sciences De La Terre :: Chimie [G01]
  • Engineering
  • Computing & Technology :: Materials Science & Engineering [C09]
  • Ingénierie
  • Informatique & Technologie :: Science Des Matériaux & Ingénierie [C09]
Disciplines
  • Biology
  • Design
  • Ecology
  • Geography

Abstract

Faure E 2012 PhD Thesis ULg abstract Bio-Inspired Polymers for the Functionalization of Industrial Steel Surfaces by Emilie FAURE Since many decades, nature has inspired the scientific community because of its amazing ability to develop powerful properties such as high mechanical strength, pigmentation, superhydrophobicity, adhesion, antireflection, etc. under environmentally friendly conditions. This thesis fits well with this trend of bio- inspiration with the development of multifunctional synthetic polymers incorporating 3,4-dihydroxy-L-phenylalanine units (DOPA), one of the main components of mussels protein foot responsible for their strong adhesion on every kind of substrates. In this thesis, the reactivity and adhesion properties of the catechol group of DOPA are exploited for the design of (i) synthetic bio-inspired glue, (ii) long-lasting antibacterial and antibiofilm coatings and (iii) anticorrosion protective films for industrial steel surfaces. The synthetic glue consists of a polycation bearing DOPA units that are required for the adhesion to the surface. This copolymer, prepared in water by a radical polymerization process in mild conditions, is easily loaded with antibacterial silver based (nano)particles (Ag0 and AgCl) by the addition of a silver nitrate solution. The Layer-by-Layer technology is then applied to build antibacterial multilayer polyelectrolyte film from aqueous solutions. Three main objectives are then targeted: (1) decrease and simplify the processing rate to meet industrial requirements, (2) substitute silver based particles by antibacterial and antibiofilm biomolecules, and (3) improve the coating durability. The structure of the copolymer and the deposition technique are then adapted to meet these important criteria. Briefly, the catechol groups of a novel homopolymer bearing DOPA units are oxidized in water to lead to the corresponding water-soluble polymer bearing reactive quinone groups. These functions are exploited

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