Superhydrophobic films for the protection of outdoor cultural heritage assets

Manoudis, Panagiotis N.; Karapanagiotis, Ioannis; Tsakalof, Andreas; Zuburtikudis, Ioannis; Kolinkeová, B.; Panayiotou, Costas

doi:10.1007/s00339-009-5233-z

Cited by 149 publications

(134 citation statements)

References 53 publications

Supporting

Mentioning

125

Contrasting

Unclassified

Order By: Relevance

“…After the application of the WR solutions, reductions were measured for all the water vapour transport parameters (Table 3). The obtained results are comparable to those reported in the literature for siloxane-based coatings on stone materials [15,34,[47][48][49]. The permeability decrease, RVP, remained below the threshold of 20%, usually accepted as tolerable [50] (p. 540), only for the T 2.5 samples.…”

Section: Water Vapour Transport Propertiessupporting

confidence: 87%

Performances and Coating Morphology of a Siloxane-Based Hydrophobic Product Applied in Different Concentrations on a Highly Porous Stone

Lettieri

Masieri

2016

Coatings

View full text Add to dashboard Cite

Many polymers, able to confer a hydrophobicity to treated surfaces, have been proposed for the restoration and conservation of civil and monumental buildings. Polysiloxanes, and their precursors, the silanes, have been frequently employed for stone protection. To avoid decay of the treated surfaces, the effectiveness and harmlessness of the treatment need to be carefully evaluated before application in the field. In this study, a commercial alkyl-siloxane was tested as a protective treatment on a highly porous stone, starting from water solutions with different contents of the product. The treatments have been devised to try to balance the requirements and the sustainability of the conservative actions. Sustainability, in terms of costs and environmental impact, is regarded as a key factor in the 21st century. Morphological observations of the stone surface, static contact angle and colour measurements, water vapour transmission test, and tests of water absorption were carried out to characterize the untreated and treated stones. A concentration below the minimum level suggested by the manufacturer was still able to act as a good barrier against water. More concentrated solutions produced polymer accumulation and coatings with extended cracks. The properties of the treated stone were affected by the presence of cracks in the coating.

show abstract

Section: Water Vapour Transport Propertiessupporting

confidence: 87%

Performances and Coating Morphology of a Siloxane-Based Hydrophobic Product Applied in Different Concentrations on a Highly Porous Stone

Lettieri

Masieri

2016

Coatings

View full text Add to dashboard Cite

show abstract

“…They applied the composites to aluminum plates using a spray gun and cured them at room temperature for 12 h. The obtained surfaces could prevent ice formation upon impact of supercooled water either under laboratory conditions or in natural environments. Manoudis et al [32,33] fabricated superhydrophobic surfaces for the enhanced protection of stone by adding silica nanoparticles into a commercial siloxane composition, thereby enhancing its protective efficiency. The extent of surface hydrophobization depended on the nanoparticle concentration and reached a maximum value of ∼160…”

Section: Polymer Film Rougheningmentioning

confidence: 99%

Large-area fabrication of superhydrophobic surfaces for practical applications: an overview

Xue¹,

She²,

Zhang³

et al. 2010

Science and Technology of Advanced Materials

303

184

View full text Add to dashboard Cite

show abstract

“…One of the main aspects in conservation of cultural heritage properties is to minimize or repair the decay of materials as a result of their exposure to different destructive agents [1], [2], [3] and the course of time. Nanostructured materials based on hydroxides such as Ca(OH) 2 (portlandite), Mg (OH) 2 or Sr(OH) 2 have been lately applied as consolidating products for restoring the loss of cohesion of carbonate stones [4], plasters [5], wall paintings or cellulose based products [6] belonging to the cultural heritage.…”

Section: Introductionmentioning

confidence: 99%

Structural stability of a colloidal solution of Ca(OH)2 nanocrystals exposed to high relative humidity conditions

et al. 2011

View full text Add to dashboard Cite

The effect of high relative humidity (90% and 75% RH) on phase transformation and stability of CaCO 3 polymorphs has been studied based on the structural and morphological changes from a colloidal solution based on Ca(OH) 2 nanocrystals. Carbonation process has been confirmed indicating differences in nucleation and stability of CaCO 3 polymorphs as a function of RH. Local fluctuations in the water/alcohol ratio significantly affect the precipitation/dissolution of anhydrous and hydrated polymorphs that are reflected in the particle size. Changes in lattice parameters and particle size are related to surface tension fluctuations, release of residual water and time of exposure.These results highly contribute to evaluate the stability of the Ca(OH) 2 nanoparticles in high humidity conditions.

show abstract

Superhydrophobic films for the protection of outdoor cultural heritage assets

Cited by 149 publications

References 53 publications

Performances and Coating Morphology of a Siloxane-Based Hydrophobic Product Applied in Different Concentrations on a Highly Porous Stone

Performances and Coating Morphology of a Siloxane-Based Hydrophobic Product Applied in Different Concentrations on a Highly Porous Stone

Large-area fabrication of superhydrophobic surfaces for practical applications: an overview

Structural stability of a colloidal solution of Ca(OH)2 nanocrystals exposed to high relative humidity conditions

Contact Info

Product

Resources

About