Nanostructuring of UV-curable polyurethane dispersion coatings with multifunctional properties (OZR-opvangmandaat IWT)

  • Van Mele, Bruno (Administrative Promotor)
  • Walters, Perry André, (Mandate)
  • Defour, Maxime, (Mandate)

Project Details

Description

All-purpose UV-PUDs will be produced similar to conventional UV-PUDs that contain UV-curable PU prepolymers, ionically stabilized within an aqueous system. These UV-PUDs are used to form coatings after drying and UV-curing, or they are photochemically cured in their aqueous colloidal state to form dispersed PU-nanoparticles, which can be reintroduced into uncured UV-PUDs.
Aiming at lowering the electrical percolation threshold of CNT-filled UV-PUD coatings, two nanostructured systems will be investigated:
- An all-purpose UV-PUD matrix where the CNTs are stabilized in the form of a percolating network by a compatibilizer that is based on a PDMS block copolymer.
- A tailor-made UV-PUD system to improve CNT compatibility, by incorporating PDMS into the UV-PUD prepolymer.
In both systems, cross-linked PU-nanoparticles will be introduced to exclude CNTs from part of the UV-PUD matrix to form an innovative percolated and segregated structure. The synthesis of the compatibilizer is based on RAFT solution polymerization of (meth)acrylates with a PDMS-RAFT macroinitiator. Similar as for the UV-PUDs, neutralization of carboxylated (meth)acrylates will ensure colloidal stability in these novel surfactant-free aqueous dispersions.
The proposed methodology is versatile and allows additional multifunctional properties of the nanostructured UV-PUD coatings, such as impact resistance or phase change behavior.
AcronymOZR2583
StatusFinished
Effective start/end date1/01/1431/12/14

Keywords

  • material science
  • thermal analysis
  • chemistry
  • surface analysis
  • NMR
  • polymer science
  • engineering
  • electrochemistry

Flemish discipline codes

  • Physical sciences
  • (Bio)chemical engineering
  • Other engineering and technology
  • Chemical sciences
  • Materials engineering