6533b835fe1ef96bd129eb8a
RESEARCH PRODUCT
Halloysite nanotubes-based nanocomposites for the hydrophobization of hydraulic mortar
Giuseppe CavallaroBartolomeo MegnaLorenzo LisuzzoMaria Rita CarusoStefana MiliotoGiuseppe Lazzarasubject
WaxMaterials scienceNanocompositeSurfaces and InterfacesGeneral Chemistryengineering.materialMicrostructureHalloysiteSurfaces Coatings and FilmsContact angleColloid and Surface ChemistryAdsorptionvisual_artStone Biopolymer Cultural heritage Halloysite nanotubes Nanocompositesengineeringvisual_art.visual_art_mediumWettingComposite materialMortarSettore CHIM/02 - Chimica Fisicadescription
Abstract The treatment of stone surfaces for their protection from ageing caused by natural and anthropogenic effects is an open issue in materials development for Cultural Heritage. We thought interesting to verify the suitability of a modified cellulose biofilm filled with halloysite nanotubes as wax compatibilizers to design a protecting layer. A hydraulic mortar was selected as a stone prototype. To improve the physico-chemical properties of the covering layer, wax microparticles have been incorporated to control transport, consolidation and wettability features. In particular, different application protocols have been studied, namely brushing and spraying, to assess whether the proposed procedures can be scaled up. Colorimetric analysis has been carried out to evidence the applicability in terms of color alteration after the treatment. Water adhesion was investigated by measuring the contact angle values as a function of time to obtain information on spreading and adsorption phenomena. These physico-chemical properties have been correlated to the microstructure evidenced by both electron and optical microscopies. Graphic abstract
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2021-09-21 | Journal of Coatings Technology and Research |