The objective of the project is to develop the industrial application of nanocellulose, particularly microfibrillated cellulose, in the domain of paints. Nanocellulose is considered as one of the 3 top priority materials in European bioeconomy. They come from the biomass and are produced by a mechanical treatment of cellulose fibers. They can be used as stabilizer of colloidal particles or emulsifier in paint formulation.
The concept of this project was derived from the patent WO 2014033409. In this patent,
it was confirmed that to attain the equivalent paper opacity of 82 %, conventional coating
needs 9 % of TiO2 while only 2.8 % of TiO2 was required when coated with MFC. The
results obtained were cost efficient and feasible at industrial scale.
Transferred to paint formulation, the addition of MFC allows the homogenous dispersion
of the expensive fillers and enables to lower the cost while maintaining pacifying quality.
This new solution for water based paints with MFC limits the release of volatile compounds,
uses less chemicals, reduces pigment sedimentation, facilitates homogenous dispersion
as well as rapid and uniform drying.
Commercially available MFCs on the marked have been benchmarked and the best
suitable MFCs have been selected for further testing of the suspension with TiO2.
Increased opacity has been proven with lower amounts of TIO2 due to the 3D network of
TiO2 and MFCs.
First paint formulations have been prepared and tested with MFC as dispersing agent.
They have proved better stability, higher viscosity and rapid drying.
Several tests on dry paint were conducted and Tack was reduced from 4 to 2.
Further formulations will be tested in 2017 to produce high performance biobased paints.
Main application is enhanced monolayer opacifying decorative paints.