Soft, Peelable Organogels from Partially Hydrolyzed Poly(vinyl acetate) and Benzene-1,4-diboronic Acid: Applications to Clean Works of Art
Soft, Peelable Organogels from Partially Hydrolyzed Poly(vinyl acetate) and Benzene-1,4-diboronic Acid: Applications to Clean Works of Art
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DOI：
10.1021/acsami.7b09473
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发表时间：
2017-08-23
影响因子：
9.5
通讯作者：
Weiss, Richard G.
中科院分区：
文献类型：
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作者：
Duncan, Teresa T.;Berrie, Barbara H.;Weiss, Richard G.
我们开发了由 40% 水解聚醋酸乙烯酯 (40PVAc) 和苯 1,4-二硼酸 (BDBA) 制成的柔软、可剥离的有机凝胶。凝胶化的有机液体包括二甲亚砜、二甲基甲酰胺、四氢呋喃、2-乙氧基乙醇和甲醇。这些软材料的神学可以通过改变聚合物和/或交联剂的浓度来调节。对导致凝胶化的机制的深入了解是从 NMR 实验、荧光测量和比较由 BDBA 和苯基硼酸（一种无法激发聚合物链之间共价交联的分子）制成的材料的性能中获得的。这些有机凝胶可以很容易地从表面剥离，不会留下紫外可见分光光度计检测不到的残留物。事实证明，它们可以有效软化和去除对水敏感的艺术品和精致表面上的劣化涂层。他们具备清洁地形复杂表面所需的特性：与表面接触良好、易于去除、去除后几乎没有残留物。 2-乙基乙醇有机凝胶用于去除 16 世纪装饰有彩绘金箔的圣物盒中的氧化清漆，乙醇凝胶用于去除 16 世纪和 18 世纪油画中的耐溶剂涂层。
We have developed soft, peelable organogels froni 40% hydrolyzed poly(vinyl acetate) (40PVAc) and benzene-1,4-diboronic acid (BDBA). The organic liquids gelated include dimethyl sulfoxide, dimethylformamide, tetrahydrofuran, 2-ethoxyethanol, and methanol. The Theology, of these soft material-s-can be tuned by altering the concentration of the polymer and/or crosslinker Insights into the mechanisms leading to gelation-were obtained from NMR experiments, fluorescence measurements, and studies-comparing properties of materials made from BDBA and phenylboronic acid, a molecule incapable of thrilling covalent crosslinks between the polymer,chains. These organogels can be easily peeled off a surface, leaving no residue detectable by UV Vis spectroscopy. They are demonstrated to be effective at softening and removing deteriorated, coatings from water-sensitive works of,art and delicate surfaces. They haye the, needed characteristics to clean topographically coippleY surfaces: good,contact with the surface, easy removal, and little to no residue after removal. A 2-ethcayethanol organogel was-usedi to, remove oxidized varnish from a 16th century reliquary decorated with painted gold leaf, and an ethanol gel wasised:to remove solvent-resistant-coatings from 16th and 18th century oil paintings.