New sustainable polymers and oligomers for Cultural Heritage conservation

Bandelli, Damiano; Mastrangelo, Rosangela; Poggi, Giovanna; Chelazzi, David; Baglioni, Piero

doi:10.1039/d3sc03909a

Cited by 12 publications

(2 citation statements)

References 97 publications

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“…Recent advancements in conservation science offer promising alternatives to conventional treatments and innovative materials derived from nature have been introduced, such as chitosan [43], nano-cellulose [63], and oils [71,72]. These materials get closer to sustainability standards and exhibit better compatibility with historical substrates.…”

Section: Green Chemistry / Nature-based Solutionsmentioning

confidence: 99%

Conservation and Protection Treatments for Cultural Heritage: Bibliometric Analysis, Novel Insights and Future Trends

Pérez-Gandarillas,

Manteca,

Yedra

et al. 2024

Preprint

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Cultural heritage is a fundamental part of the society’s identity, and its conservation is of great relevance as it transcends time and memory. To minimize its deterioration, cultural heritage has traditionally undergone diverse preservation and maintenance treatments and the attention of researchers to develop new and innovative methods for state diagnosis and protection treatments has been increasing in the recent decades. Therefore, in this study, a literature review using a bibliometric analysis and LDA methodology was conducted to systematically map scientific research outputs on cultural heritage conservation and protection. Data was retrieved from the Scopus database and the annual publications, countries, most-cited publications, authors, institutions, and keywords have been comprehensively analyzed, leading to the detection of research trends. Findings show an increasing number of studies in this field in the last decades, particularly since 2010. Italy, home to the largest number of UNESCO heritage sites, is the most prolific country. Most of the studies are related to metal, paper and stone as substrate to be protected. Significant progress has been made in understanding the deterioration processes through precise diagnosis and the development of innovative treatments for protection. In this sense, latest trends have been detected such as the use of non-invasive techniques for diagnosis and the use of nanotechnology and nature-based treatments for the conservation treatments.

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Section: Green Chemistry / Nature-based Solutionsmentioning

confidence: 99%

Conservation and Protection Treatments for Cultural Heritage: Bibliometric Analysis, Novel Insights and Future Trends

Pérez-Gandarillas,

Manteca,

Yedra

et al. 2024

Preprint

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“…Concerning the addition of thickening substances in order to raise the viscosity of the emulsions, several biopolymers are used for conservation of cultural heritage. ,− The use of gels on historical artifacts allows to minimize solvent penetration, increase the wettability of the emulsions, and reduce superficial residues . Among biopolymers, Funori could represent an appropriate candidate as a thickening agent for the preparation of a biopolymeric gel filled with HNTs stabilized isooctane droplets.…”

Section: Introductionmentioning

confidence: 99%

Pickering Emulsion Gel Based on Funori Biopolymer and Halloysite Nanotubes: A New Sustainable Material for the Cleaning of Artwork Surfaces

D’Agostino,

Caruso,

Cavallaro

et al. 2024

ACS Appl. Polym. Mater.

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Within the cultural heritage field, colloidal systems based on ecofriendly products represent alternatives to toxic solvents as cleaners for surface artworks. In this paper, we developed an innovative protocol to prepare a Pickering emulsion gel based on Funori biopolymer, halloysite clay nanotubes (HNTs), and isooctane as confined oil phase. The filling of oil droplets within the Funori network might reduce the amounts of hydrocarbons necessary for surface cleaning applications. Moreover, the specific interactions between Funori biopolymer and halloysite stabilized isooctane droplets could increase the colloidal stability of the Pickering emulsions and favor the removal efficiency toward hydrophobic contaminants. First, we optimized the preparation of Funori gel in aqueous media by the addition of variable amounts of Ba 2+ ions as cross-linkers. To this purpose, we studied the biopolymer cross-linking process by the investigation of the rheological properties and the gelation kinetics. Then, we prepared a hybrid gel based on Funori and Pickering emulsions stabilized by HNTs to achieve sustainable materials with hydrophobic microdomains that are useful for surface cleaning applications. We investigated the colloidal stability and the rheological properties, which were strictly correlated to the specific Funori/halloysite interactions. The peculiar effects of Funori on the HNTs Pickering emulsion were assessed by studying the energetics of detaching of halloysite at isooctane/water interface. Remarkably, the presence of the biopolymer enhanced the interfacial activity of HNTs and, consequently, the colloidal stability of the Pickering emulsion. Finally, we explored the surface cleaning efficiency of the Pickering emulsion gel toward Regalrez 1126, which is a hydrophobic contaminant that can be found on artworks. Remarkably, both contact angle measurements and optical investigations revealed a complete removal of Regalrez 1126 from the surface after 2 min of gel application. Further cleaning tests on a real artwork (an oil on canvas coming from a private collection) confirmed the suitability of the Funori/HNTs/isooctane gel for restoration purposes.

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“Twin Chain” PVA Cryogels with Controlled Tortuosity as Advanced Materials for Cleaning of Works of Art

Mastrangelo,

Bandelli,

Pensabene Buemi

et al. 2024

Adv Funct Materials

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Soft matrices with tuned properties are part of the vast landscape of innovative materials for the restoration of works of art. “Twin chain” polymer networks (TC‐PNs) based on polyvinyl alcohol have proven unique as scaffolds for Cultural Heritage cleaning. They enable optimum adaptability, adhesion, porosity, and connectivity at both micro‐ and nano‐scale resulting in superior time/space‐controlled cleaning operations. In this work, TC‐PNs properties are tuned through a mild crosslinking of the poly(vinyl alcohol) (PVA)‐porogen polymer by using sebacic, adipic, or succinic acid. The modified porogens have different structural features imparting a different phase behavior to TC‐PVAs mixtures in aqueous solution, i.e., in pre‐gel systems used to form gels through a liquid–liquid phase separation. The macro‐, micro‐, and nanoscale features of the final gels are characterized by Confocal Laser Scanning Microscopy, Small Angle X‐ray Scattering, Rheology and are related to their cleaning performances. The study shows that the gels cleaning capacity is related to their tortuosity, that can be tailored at the nanoscale. Counterintuitively gels with higher tortuosity show better performances as evidenced by the cleaning of mockups and paintings from Jean Helion, Jackson Pollock, and Tancredi Parmeggiani at Peggy Guggenheim Collection in Venice.

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New sustainable polymers and oligomers for Cultural Heritage conservation

Abstract: We highlight here current trends of “green” materials for Cultural Heritage, and we introduce a new methodology to determine macromolecule's log P, applying it to the development of new smart organogels for Cultural Heritage conservation.

Cited by 12 publications

References 97 publications

Conservation and Protection Treatments for Cultural Heritage: Bibliometric Analysis, Novel Insights and Future Trends

Conservation and Protection Treatments for Cultural Heritage: Bibliometric Analysis, Novel Insights and Future Trends

Pickering Emulsion Gel Based on Funori Biopolymer and Halloysite Nanotubes: A New Sustainable Material for the Cleaning of Artwork Surfaces

“Twin Chain” PVA Cryogels with Controlled Tortuosity as Advanced Materials for Cleaning of Works of Art

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