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.
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.
Acronym | OZR2583 |
---|---|
Status | Finished |
Effective start/end date | 1/01/14 → 31/12/14 |
Keywords
- material science
- thermal analysis
- chemistry
- surface analysis
- NMR
- polymer science
- engineering
- electrochemistry
Flemish discipline codes in use since 2023
- Physical sciences
- Materials engineering
- (Bio)chemical engineering
- Chemical sciences
- Other engineering and technology
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