Fibroline is an engineering company specialized in technology transfer based in France near Lyon. The company has developed and patented several dry powder impregnation solutions to functionalize porous structures. One of the growth markets for Fibroline is filtration, with the impregnation of active powders inside filter medias in particular for gas capture (CO₂, odors, war gases, etc.) and water treatment (arsenic removal, etc.).

Dry impregnation consists in the distribution of powders in any form into porous structures by the use of high intensity alternating electric fields. No solvents are required. Using repulsion of particles grants the capacity to impregnate in an extremely homogenous way, occupying all of the available space within the given material. It also allows to deposit active porous particles in various ratios.

Fibroline’s solutions are perfectly suited for the use of adsorbent powders as MOFs or ion exchange resins. Some of them can be sensitive to humidity, then Fibroline is a good option for getting these particles into substrates.

Because these technologies are based out of dry impregnation, they do not require any liquid binders, leading to the reduction of clogging effect. Therefore, active in powder form is fully available and this results in much higher efficiency of impregnated products overall.

Moreover, the use of actives in powder form also grants capacity to increase the specific surface area of the materials used by the manufacturers. Indeed, by using very thin powder instead of beads or pellets, the product benefits from a much wider active surface, and can therefore provide higher adsorption capacity and faster adsorption and desorption kinetics.

These dry impregnation methods can be an environmentally friendly alternative to conventional liquid impregnations.