There is a growing interest to move toward waterborne systems in the coatings industry due to environmental and occupational health reasons.However,the change is not always straightforward and often new technologies are required to obtain the same performance as with solventborne systems.Microfibrillated cellulose(MFC),a value-added and multifunctional product made of cellulose,consists of fibers with lateral dimensions in the nanoscale range and lengths up to the micron scale.The main characteristic of this unique fiber structure is its resemblance to both water-soluble polymers and insoluble additives,leading to a versatile and efficient alternative to technologies currently available.The high inertness,compatibility and stability of MFC opens up new possibilities for waterborne coatings,especially for the more demanding formulations.MFC secures high viscosity at rest,giving good stability,as well as offering shear thinning behavior and rapid viscosity build-up,which prevents sag during application.
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