Acrylic Polymers for the Conservation of Stone: Advantages and Drawbacks

Tabasso, Marisa Laurenzi

doi:10.2307/1504445

Cited by 30 publications

(19 citation statements)

References 4 publications

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“…Moreover, protectives based on acrylic resins exhibit a scarce adhesion to porous substrates and provide insufficient water drainage and vapor permeability from the coated surface [1,10,11]. The treatments applied on building materials must be "breathable" to avoid physical phenomena, such as freezing/thawing cycles and salt crystallization, causing fast deterioration of stone materials [12,13]. Indeed, the stronger the hydrophobicity of the conservation material, the larger the stress between hydrophilic/hydrophobic interfaces is, and much more likely that detaching and peeling will occur [14].…”

Section: Introductionmentioning

confidence: 99%

Waterborne Acrylate-Based Hybrid Coatings with Enhanced Resistance Properties on Stone Surfaces

et al. 2018

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Abstract:The application of coating polymers to building materials is a simple and cheap way to preserve and protect surfaces from weathering phenomena. Due to its environmentally friendly character, waterborne coating is the most popular type of coating, and improving its performance is an important key of research. The study presents the results regarding the mechanical and photo-oxidation resistance of some water-based acrylic coatings containing SiO 2 nanoparticles obtained by batch miniemulsion polymerization. Coating materials have been characterized in terms of hydrophobic/hydrophilic behavior, mechanical resistance and surface morphology by means of water-contact angle, and scrub resistance and atomic force microscopy (AFM) measurements depending on silica-nanoparticle content. Moreover, accelerated weathering tests were performed to estimate the photo-oxidation resistance of the coatings. The chemical and color changes were assessed by Fourier-transform infrared spectroscopy (FTIR) and colorimetric measurements. Furthermore, the nanofilled coatings were applied on two different calcareous lithotypes (Lecce stone and Carrara Marble). Its properties, such as capillary water absorption and color modification, before and after accelerated aging tests, were assessed. The properties acquired by the addition of silica nanoparticles in the acrylic matrix can ensure good protection against weathering of stone-based materials.

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Section: Introductionmentioning

confidence: 99%

Waterborne Acrylate-Based Hybrid Coatings with Enhanced Resistance Properties on Stone Surfaces

et al. 2018

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“…To obtain a good protection, the treatment must be effective both on the capillary walls and on the exterior surface of the stone. Besides water repellency, protective treatments must fulfill two more requirements: they must be colorless and stable to oxygen and UV radiation, even when aged, in order to minimize their impact on the appearance of the stone and, while making the treated stone impermeable to liquid water, they must leave it permeable to water vapor, although this last point is somewhat controversial …”

Section: Introductionmentioning

confidence: 99%

“…Besides water repellency, protective treatments must fulfill two more requirements: they must be colorless and stable to oxygen and UV radiation, even when aged, in order to minimize their impact on the appearance of the stone and, while making the treated stone impermeable to liquid water, they must leave it permeable to water vapor, although this last point is somewhat controversial. [2] Nonetheless, while conservators pay homage to the principle of reversibility, the issue of re-treatability may be the most important property of a good coating treatment. Re-treatability is defined as the possibility of applying a new treatment without negative results.…”

Section: Introductionmentioning

confidence: 99%

An Acrylic Latex Filled with Zinc Oxide by Miniemulsion Polymerization as a Protective Coating for Stones

Serra

Tulliani

Sangermano

2014

Macro Materials & Eng

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An acrylic latex filled with ZnO by miniemulsion polymerization are developed for stone protection. The main latex chemical properties are determined through dynamic light scattering and differential scanning calorimetry measurements. Contact angle determination, capillary water absorption, scanning electron microscopy observations, and colorimetric measurements are also used to evaluate the coating. The accelerated photo‐aging of the dried films are monitored by infrared spectroscopy. The synthesis of a water dispersion product and the photostability reached through the introduction of ZnO represent the main advantages of this coating for the use in the field of stone conservation.

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“…The main reasons for their popularity are their diversity in type and range of applications and the possibility of individualised or performance-oriented adjustment during production [9]. Acrylic resins, silicon-based resins, microcrystalline waxes, perfluoropolyethers (PFPEs), polyfluorourethanes, fluorinated polymers, and fluoroelastomers are the representative compounds [8][9][10][11][12][13]. Recently, starting from the 21st century, some innovative materials such as structurally modified acrylic polymers and PFPEs, organic-inorganic hybrids, nano-scaled and microemulsions of some polymers, and nanoparticle composites, etc., have being proposed and tested [14][15][16][17][18][19][20].…”

mentioning

confidence: 99%

“…Recently, starting from the 21st century, some innovative materials such as structurally modified acrylic polymers and PFPEs, organic-inorganic hybrids, nano-scaled and microemulsions of some polymers, and nanoparticle composites, etc., have being proposed and tested [14][15][16][17][18][19][20]. These products usually show good chemical and physical compatibility, good adhesion, and good solubility, and in some cases a good consolidation effect [9,10,16]. Yet, they also have drawbacks in long-term use (e.g., low photo-oxidative stability, biodegradation, irreversibility) [10,16,[21][22][23][24].…”

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confidence: 99%

Current Status and Future Prospects of Applying Bioinspired Superhydrophobic Materials for Conservation of Stone Artworks

2020

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The development of innovative materials is one of the most important focus areas in heritage conservation research. Eligible materials can not only protect the physical and chemical integrity of artworks but also preserve their artistic and aesthetic features. Recently, as one of the hot research topics in materials science, biomimetic superhydrophobic materials have gradually attracted the attention of conservation scientists due to their unique properties. In fact, ultra-repellent materials are particularly suitable for hydrophobization treatments on outdoor artworks. Owing to their excellent hydrophobicity, superhydrophobic materials can effectively prevent the absorption and penetration of liquid water as well as the condensation of water vapor, thus greatly relieving water-induced decay phenomena. Moreover, in the presence of liquid water, the superhydrophobic surfaces equipped with a self-cleaning property can clean the dirt and dust deposited spontaneously, thereby restoring the artistic features simultaneously. In the present paper, besides the basic principles of wetting on solid surfaces, materials, and methods reported for preparing bioinspired ultra-repellent materials, the recently proposed materials for art conservation are also introduced and critically reviewed, along with a discussion on the droplet impact and durability of the artificial superhydrophobic surfaces. Lastly, the current status and the problems encountered in practical application are also pointed out, and the focus of future research is presented as well.

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Acrylic Polymers for the Conservation of Stone: Advantages and Drawbacks

Cited by 30 publications

References 4 publications

Waterborne Acrylate-Based Hybrid Coatings with Enhanced Resistance Properties on Stone Surfaces

Waterborne Acrylate-Based Hybrid Coatings with Enhanced Resistance Properties on Stone Surfaces

An Acrylic Latex Filled with Zinc Oxide by Miniemulsion Polymerization as a Protective Coating for Stones

Current Status and Future Prospects of Applying Bioinspired Superhydrophobic Materials for Conservation of Stone Artworks

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