Nanostructured fluids confined into Highly Viscous Polymeric Dispersions as cleaning tools for artifacts: A rheological, SAXS, DSC and TOF-SIMS study

Carretti, Emiliano; Poggi, Giovanna; Ghelardi, Elisa; Porpora, Francesca; Magnani, Agnese; Fratini, Emiliano; Dei, Luigi; Consumi, Marco

doi:10.1016/j.colsurfa.2022.128968

Cited by 3 publications

(2 citation statements)

References 45 publications

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“…The mechanical properties can also be improved by blending PVA with agarose in double polymer networks [130]. The PVA-borax HVPDs can be loaded with o/w microemulsions, and it was shown that, while SDS has a de-structuring effect, the co-surfactant 1pentanol and the solvent xylene provide an overall structuring effect and increase the mechanical strength of the polymer network, whose relaxation process follows a sticky reptation mechanism where reversible bond breaking and making between associating groups (stickers) controls the dynamics of the associating polymers [131,132]. According to the model, viscosity has a very strong concentration dependence.…”

Section: Gelsmentioning

confidence: 99%

Advanced methodologies for the cleaning of works of art

Casini

Chelazzi

Baglioni

2023

Sci. China Technol. Sci.

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Cultural heritage assets constitute a fundamental socioeconomic resource, but the actual works of art need to be maintained, counteracting degradation processes, to transfer these benefits to future generations. In particular, the removal of soil, aged coatings, and vandalism/overpaints is one of the most needed interventions in art restoration. Traditional cleaning methodologies, based on classical solution and polymer chemistry, only grant limited control of the cleaning interventions, with the risk of affecting the original components of the artifacts, and often involving the use of toxic or non-environmentally friendly compounds. Alternatively, materials science, colloids, and soft matter have provided valuable and safe solutions in the last decades. This review provides a selection of the most recent and advanced methodologies for the wet cleaning of works of art, spanning from nanostructured cleaning fluids (microemulsions, surfactants swollen micelles) to physical and chemical gels. The new methodologies work on different physico-chemical mechanisms, such as processes for detaching/dewetting, to selectively remove the unwanted layers in sustainable and cost-effective interventions. The best performing systems, like microemulsions confined in “twin-chain” polyvinyl alcohol gels, have been assessed in the cleaning of masterpieces such as works by Pablo Picasso, Jackson Pollock and Roy Lichtenstein. Particular attention is dedicated to “green” chemistry systems, using low-toxicity solvents or bio-based/waste materials to build gel networks. Finally, current trends and future perspectives are given, showing that advanced systems for art cleaning link with transversal fields of crucial importance even beyond Cultural heritage conservation, e.g., detergency, tissue engineering, drug-delivery, food industry and cosmetics.

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Section: Gelsmentioning

confidence: 99%

Advanced methodologies for the cleaning of works of art

Casini

Chelazzi

Baglioni

2023

Sci. China Technol. Sci.

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“…Frontiers in Ocean Observing -Early Online Release elements onto the plastic surface. ToF-SIMS provides spatially resolved chemical composition (Carretti et al, 2022).…”

Section: Support Technologiesmentioning

confidence: 99%

Exploring Methods for Understanding and Quantifying Plastic-Derived Dissolved Organic Matter

Zhu¹,

Gaggelli²,

Boldrini³

et al. 2023

Oceanog

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Plastics have accumulated in the environment to become a globally significant pool of organic carbon (Stubbins et al., 2021) and a contaminant of ecological concern (McLeod et al., 2021). Most studies still report plastics in terms of counts (i.e., pieces of plastics) though some report masses of plastics, and even fewer report plastic carbon. In a recent review, we assumed plastics to be 83% carbon by mass based on data for oceanic microplastics (Zhu et al., 2020; Stubbins et al., 2021). This overly simplistic conversion allows plastics to be placed in a carbon cycle context, a context critical to plastic-derived dissolved organic carbon (DOC; Figure 1). However, this conversion should be improved to account for variations in the carbon content of different polymers. To make these improvements, studies should report data for sizes, masses, and types of base polymer of plastics collected. These data would allow comparison among studies and facilitate improved accounting for plastics and their fates in the environment. Reporting masses of specific polymers would make conversion from plastics to carbon more accurate and provide a common chemical unit for comparison among plastic polymer types (i.e., we could use carbon as we do biomass).

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