Shedding Light on Functional Hybrid Nanocomposites 19th Century Paint Medium

Abstract

British 19 th century painters formulated gelled systems described as "the most facile and versatile vehicle(s) that any painter has ever had at his disposal". [1] These so-called megilps or gumtions, are based on common paint materials i.e., linseed oil, lead acetate and mastic resin, and allowed painters such as J.M.W Turner to improve their paint's properties and achieve unprecedented effects in an age of innovation.To propose a structural scheme of these hybrid systems of unprecedented complexity, it was paramount to design and study model systems using a broad combination of advanced spectroscopic techniques and microscopies. Through this approach, we can describe gel Mediums as nanocomposites, based on lead metallogels co-existing with lead oxide nanoparticles and a partially polymerised fraction. These functional hybrid materials created a real breakthrough on 19 th century paints performances. IntroductionReceived: ((will be filled in by the editorial staff))Revised: ((will be filled in by the editorial staff))

Investigating Nineteenth Century Gel Mediums: From Historical Recipes to Model Systems

“…Despite the carboxylate features present in the jelly phase, it is interesting to note that these acetate compounds with Cu, Mn and Zn did not form homogenous gels. This investigation also indicates, that similar to the case with dammar-lead mixtures, the formation of soaps alone is not enough to form a gel; the gelation process requires the specific properties of lead (Pasco et al, 2021).…”

“…Similar observations can be made with the formation of new carboxylate species in the system confirming the reaction between triterpenoids of the resin bearing acidic functions and the lead compound. These spectra are detailed in Pasco et al (2021) with details on the possible structure of the lead-oleanolic acid complex. FTIR spectra of the preparations based on the historical recipes, with oil, mastic and lead acetate, also show this carboxylate band around 1520 cm -1 .…”

Thermo-temporal physisorption in metal–organic frameworks probed by cyclic thermo-ellipsometry

“…8 Notably, the so-called “Environmental Ellipsometric Porosimetry” (EEP) is well suited to characterize the porosity through vapor physisorption. 9 EEP has been used to characterize MOF films and investigate the pore size distribution, pore volumes and, in some cases, mechanical properties. 10 However, these characterizations are usually done “at equilibrium” and at constant temperature.…”

Clément Sanchez and the Hybrid Materials Community: L’Imagination au Pouvoir

“…In the past decade, Clément’s interests focused on novel chemistry and processing pathways, namely, in the coupling of mineral reactive extrusion to attain new phases, the in-depth in situ and operando study of the formation processes of nanosystems such as perovskites, metal oxides, or biominerals, through liquid HRTEM, NMR, and SAXS, as well as the development of new electroactive systems via electrochemically assisted carbon-based hybrid materials. In addition, he continues building new bridges with other fields, for example, by revisiting the chemical origins of “old” hybrid materials used in art …”

“…In addition, he continues building new bridges with other fields, for example, by revisiting the chemical origins of "old" hybrid materials used in art. 17 In his nearly 45 years of career, Cleḿent Sanchez has had deep impact and exerted a huge influence on the Materials Chemistry community, through the development of a new axis of original research in hybrid materials, combining creativity and chemical intuition with the application of transversal stateof-the-art characterization techniques and in situ analysis, to ultimately gain insight in the delicate steps that lead to bioinspired nanomaterials. He has built solid bridges between local molecular structure and multiscale properties in complex hybrid nanoarchitectures.…”