RT Journal Article
T1 Airbrushed PSF/ZnO composite coatings as a novel approach for the consolidation of historical bones
A1 Moradienayat, Monireh
A1 González Benito, Francisco Javier
A1 Olmos Díaz, Dania
AB In this work, the preparation and characterization of films based on polysulfone (PSF) filled with zinc oxide, ZnO, nanoparticles (NPs) are conducted. The novelty of this research mainly relies on two points: (i) the use of a commercial airbrush to prepare or modify materials, and (ii) the design of new materials (nanocomposites) for the consolidation and restoration of historical bones. To accomplish these objectives, free-standing thin films and ancient bone coatings of PSF/ZnO nanocomposites with different particle contents (0%, 1%, 2%, 5% and 10%, % wt) are prepared using a commercial airbrush. Mechanical characterization is carried out to correlate properties between free-standing thin films and coatings, thus understanding the final performance of the coatings as consolidants for ancient bones. Thin films of PSF/ZnO show that the elastic modulus (E) increases with particle content. The mechanical behavior of the surfaces of the treated and untreated bones is studied locally using Martens hardness measurements. Maximum values of Martens hardness are obtained for the bone samples treated with polysulfone filled with 1% ZnO nanoparticles (HM = 850 N·mm-2) or 2% ZnO (HM = 625 N·mm-2) compared to those treated just with neat PSF (HM = 282 N·mm-2) or untreated bone (HM = 140 N·mm-2), indicating there is a correspondence between rigidity of free-standing films and hardness of the corresponding coatings. In terms of mechanical performance, it is demonstrated the existence of a balance between nanoparticle concentration and probability of nanoparticle aggregation, which allows better material design for ancient bones consolidation.
PB MDPI
SN 2079-4991
YR 2023
FD 2023-02-02
LK https://hdl.handle.net/10016/37372
UL https://hdl.handle.net/10016/37372
LA eng
NO The authors wish to acknowledge financial support from Fondos de Investigación de Fco., Javier González Benito, política de reinversión de costes generales, Universidad Carlos III de Madrid (2012/00130/004), Acción Estratégica en Materiales Compuestos Poliméricos e Interfases, Universidad Carlos III de Madrid (2011/00287/002) and Adquisición de un microscopio electrónico de barrido de emisión de campo y ambiental (FEDER) (2013/00540/001), and project number 2020/00355/001 from CAM (Comunidad Autónoma de Madrid). This work has been supported by Comunidad de Madrid (Spain) multiannual agreement with UC3M ("Excelencia para el Profesorado Universitario"-EPUC3M04) fifth regional research plan 2016-2020.
DS e-Archivo
RD 1 jul. 2024