Lista wynalazków

ZoP Antimicrobial composition based on cellulose and ZnO loaded with citronellol for restoring paper from documents affected by the microorganisms

autorzy: OPREA Ovidiu-Cristian, FICAI Anton, FICAI Denisa, MOTELICA Ludmila, ANDRONESCU Ecaterina, TRUȘCA Roxana Doina

The present invention relates to the production of cellulose-based gel compositions with citronellol-loaded ZnO nanoparticles for the restoration of paper documents, which will provide long-lasting antimicrobial protection. Due to the activity of microorganisms, the cellulosic support can be damaged, from the appearance of spots to the complete destruction. The cellulose derivative gel, with ZnO nanoparticles loaded with citronellol, by rapid drying, forms a cellulose film that will repair the damaged areas (cracks, holes with missing material, etc.). The gel can also be inserted under the letters that came off the original support due to the degradation of the cellulosic material. By fast drying it will act like a real glue, but having the same composition, based on cellulose. Because the composition contains ZnO nanoparticles, the cellulose film remaining after drying has antimicrobial activity and no longer allows the development of microorganisms on the treated area. The loaded citronellol will potentiate antimicrobial activity through synergism. If desired, the gel can be applied evenly over the entire page, after drying forming a protective film over the inscription, with antimicrobial activity, which will seal and protect virtually the entire document. Thus, immediately after application, by evaporation of the solvent, a cellulose film with a thickness of microns can be obtained, which is much thinner than the thinnest Japanese paper.