TiO₂‐Oligoaldaramide nanocomposites as efficient core‐shell systems for wood preservation

Abstract

Homogeneous core-shell systems were obtained with a growth, in controlled steps, of several oligoamides on TiO 2 nanoparticles. Derivatives of natural compounds, such as L-tartaric acid and a,a 0 -trehalose, were used as diesters in the polycondensation reactions with ethylenediamine. TiO 2 anatase was chosen because of its high photo-activity and its antimicrobial activity. The TiO 2 nanoparticles had been previously activated then functionalized using two different coupling agents, and finally, the TiO 2 -oligoamide nanocomposites were synthesized using two synthetic pathways. The final products were characterized by 1 H NMR, 13C NMR, FT-IR, and transmission electron microscope. These nanocomposites can show improved properties in comparison with the single components (TiO 2 nanoparticles or oligoamides), which are useful in many fields, such as antimicrobial coatings for surfaces in cultural heritage conservation. A nanocomposite (TiO 2 -polyethylenetartaramide) was used for applicative studies, and it has shown a good efficacy against fungal attack by Trametes versicolor on wood specimens (Fagus sylvatica). V C 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42047.

Fabrication of core–shell nanocomposites with enhanced photocatalytic efficacy

“…A new band at 614–624 cm −1 located in the broad region from 480 to 700 cm −1 is the specific peak for TiO 2 in the FTIR spectra for TiO 2 @PAPDA‐II to TiO 2 @PAPDA‐VI core–shell nanocomposites. A similar value of the TiO 2 band was recently reported . This proves the incorporation of TiO 2 nanoparticles into the PAPDA‐I backbone.…”

Application of Nanotechnology in Wood-Based Products Industry: A Review

“…Titanium dioxide (TiO 2 ) is another nanoparticle that has a good potential to be used as wood preservative. The potential of TiO 2 is related to its antibacterial and antifungal [ 14 , 225 ] and UV-resistant properties [ 225 , 226 ]. However, the study on wood treated with TiO 2 is still under preliminary investigation [ 14 , 225 ].…”

Novel Attribute of Organic–Inorganic Hybrid Coatings for Protection and Preservation of Materials (Stone and Wood) Belonging to Cultural Heritage

“…In applications for wood protection, many positive effects have been observed: the cellular microstructures of wood are easily and well coated by the nano-particles [93]; good anchoring takes place through interaction of TiO 2 particles with hemicellulose and lignin [94]; pronounced hydrophobicity [93,94] and reduction of fungi growth [95,96] are found. However, TiO 2 for UV protection of wood difficult work effectively if used alone or if the applied coating does not achieve a suitable thickness [97,98].…”