Coating with photocatalytic and antimicrobial effect for the protection of natural limestone elements of vernacular buildings and procedure for obtaining it
Authors: Toma Fistos, Radu Claudiu Fierascu, Irina Fierascu, Mihaela-Alina Melinescu, Anton Ficai, Denisa Ficai, Lia Mara Ditu, Irina Gheorghe-Barbu, Roxana Ioana Brazdis (Matei), Anda Maria Baroi
Company/Institution: NATIONAL INSTITUTE FOR RESEARCH & DEVELOPMENT IN CHEMISTRY AND PETROCHEMISTRY – ICECHIM BUCHAREST
Country: Romania
e-mail: office@icechim.ro
web: www.icechim.ro
The present invention refers to a nanocomposite coating material with photodegradation and antimicrobial properties, which provides protection (consolidation) for natural stone elements in the composition of vernacular constructions (materials with high calcium content), represented by an alcoholic dispersion, made in a mixture ethanol: isobutyl alcohol, containing a composite material consisting of two phases: a phase based on a double-layered hydroxide mixture (hydrotalcite)/metal oxide nanoparticles (Ti, Zn) of commercial origin and a phase consisting of a mixture of hydroxide calcium and hydroxyapatite in which calcium has or has not been partially dislocated with zinc. The formulation, due to the inorganic composition, presents an improved stability in relation to other formulations based on organic polymers and organic antimicrobial substances.
Acknowledgements:
This work was supported by a grant of the Ministry of Research, Innovation, and Digitization, CCCDI-UEFISCDI, project number PN-III-P2-2.1-PED-2021-0627, within PNCDI III. It is also acknowledged the support of Ministry of Research, Innovation and Digitization through Program 1 – Development of the national research-development system, Subprogram 1.2-Institutional performance- Projects to finance excellence in RDI, Contract no. 15PFE/2021. (Patent application No. A-00558/2023)
