RT Journal Article
T1 Cracks in consolidants containing TiO2 as a habitat for biological colonization: A case of quaternary bioreceptivity
A1 Sanmartín Sánchez, Patricia
A1 Noya Pintos, Daniel
A1 Fuentes Alonso, Elsa
A1 Pozo Antonio, José Santiago
K1 Biodeterioration
K1 Greening
K1 Consolidant
K1 Stone
K1 Nanotechnology
K1 TiO2
AB The recently proposed concept of quaternary bioreceptivity applies to substrates treated with coating materials and it is considered in the present study with the alga Bracteacoccus minor and the cyanobacterium Nostoc sp. onto granite specimens treated with ethyl silicate and nano-sized silica doped with different amounts of TiO2 (0, 0.5, 1 and 3 wt%). The findings showed a lack of correlation between the amount of TiO2 and the level of colonization (main bioreceptivity estimator) to the presence of cracks on the surface, which annul the biocidal power of TiO2. Crack formation, which depends on the mechanical properties, greatly influences the bioreceptivity of the material. Thus, the cracks provided anchor points where water is retained, in turn strongly influencing the early stages of colonization kinetics, to a greater extent than the biocidal power of TiO2, which will probably increase as the biofilm develops over the entire surface. In addition, although the cracks were more abundant and wider in the ethyl silicate-based consolidant, the nano-sized silica provided better anchoring points, making the material treated with the corresponding consolidant more bioreceptive
PB Elsevier
YR 2021
FD 2021
LK http://hdl.handle.net/10347/27521
UL http://hdl.handle.net/10347/27521
LA eng
NO Materials Science and Engineering: C 124 (2021) 112058
DS Minerva
RD 29 abr 2026