Department of Chemistry, University of Florence, I-50019 Florence, Italy.
Consorzio Interuniversitario per lo Sviluppo dei Sistemi a Grande Interfase (Center for Colloid and Surface Science), University of Florence, I-50019 Florence, Italy.
Proc Natl Acad Sci U S A. 2020 Mar 31;117(13):7011-7020. doi: 10.1073/pnas.1911811117. Epub 2020 Mar 9.
Conservation of our cultural heritage is fundamental for conveying to future generations our culture, traditions, and ways of thinking and behaving. Cleaning art, in particular modern/contemporary paintings, with traditional tools could be risky and impractical, particularly on large collections of important works to be transferred to future generations. We report on advanced cleaning systems, based on twin-chain polymer networks made of poly(vinyl alcohol) (PVA) chains, semiinterpenetrated (semi-IPN) with PVA of lower molecular weight (L-PVA). Interpenetrating L-PVA causes a change from gels with oriented channels to sponge-like semi-IPNs with disordered interconnected pores, conferring different gel (and solvent) dynamics. These features grant residue-free, time efficient cleaning capacity and effective dirt capture, defeating risks for the artifact, making possible a safer treatment of important collections, unconceivable with conventional methods. We report as an example the conservation of Jackson Pollock's masterpieces, cleaned in a controlled way, safety and selectivity with unprecedented performance.
保护我们的文化遗产对于向后代传递我们的文化、传统、思维和行为方式至关重要。使用传统工具清洁艺术品，特别是现代/当代绘画，可能存在风险且不切实际，特别是对于要传承给后代的大型重要作品收藏。我们报告了基于由聚乙烯醇（PVA）链制成的双链式聚合物网络的先进清洁系统，该系统与低分子量的 PVA（L-PVA）半互穿（semi-IPN）。互穿的 L-PVA 导致具有定向通道的凝胶转变为具有无序互连孔的海绵状半互穿网络，赋予不同的凝胶（和溶剂）动力学。这些特性赋予了无残留、高效的清洁能力和有效的污垢捕捉能力，克服了对文物的风险，使得对重要藏品进行更安全的处理成为可能，这是传统方法无法实现的。我们报告了一个例子，即对杰克逊·波洛克的杰作进行了安全、有选择性的控制清洁，其性能前所未有。
