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A new sustained release paper-based packaging with antibacterial property was developed using the synergistic action between beta-cyclodextrin (βCD) and microfibrillated cellulose (MFC).

Carvacrol, an antibacterial molecule, was included in βCD, previously grafted onto paper substrates, by impregnation. The MFC suspension was coated on the ensued substrate surface using a bar-coating process. Properties such as the Young modulus, zero-span breaking length or air permeability were characterized. Two release studies were conducted in deionized water and agar. Antibacterial tests were carried out in parallel.

The mechanical properties were drastically damaged by the grafting process, whereas the barrier properties were maintained or even improved due to the MFC coating. The βCD-grafted samples allowed the gradual release of carvacrol 21 h later and with a release kinetic 24% slower in water. In …