Department of Chemistry Ugo Schiff and CSGI Consortium, University of Florence, via della Lastruccia 3, I-50019 Sesto Fiorentino (Florence), Italy.
Langmuir. 2013 Aug 6;29(31):9881-90. doi: 10.1021/la401883g. Epub 2013 Jul 26.
The interactions between an acrylic copolymer, poly ethylmethacrylate/methylacrylate (70:30) (Poly(EMA/MA), and Ca(OH)2 nanoparticles were investigated in order to establish the reciprocal influence of these two compounds on their peculiar properties. The carbonation kinetics of Ca(OH)2 nanoparticles by atmospheric CO2 was investigated by FTIR and SEM measurements and compared to that of a nanocomposite film. CaCO3 formation occurred even in the presence of the copolymer, but only after an induction period of ca. 200 h and with a lower reaction rate. Some implications in cultural heritage conservation dealing with application of nanolime on artifacts previously treated with acrylic copolymers were discussed. Contact angle measurements, mechanical cohesion properties, and water vapor permeability allowed us to conclude that the optimum behavior of nanolime with respect to transpiration was not compromised by the presence of the copolymer, and the behavior in terms of mechanical properties recovery by the application of Ca(OH)2 nanoparticles remained excellent even in the presence of poly(EMA/MA).
为了确定这两种化合物对彼此特殊性质的相互影响，研究了丙烯酸共聚物聚甲基丙烯酸乙酯/甲基丙烯酸（70:30）（Poly(EMA/MA)与 Ca(OH)2 纳米粒子之间的相互作用。通过 FTIR 和 SEM 测量研究了大气 CO2 对 Ca(OH)2 纳米粒子的碳化动力学，并将其与纳米复合材料薄膜进行了比较。即使在共聚物存在的情况下，也会发生 CaCO3 形成，但仅在约 200 小时的诱导期后，且反应速率较低。讨论了与在先前用丙烯酸共聚物处理过的文物上应用纳米石灰有关的文化遗产保护中的一些应用。接触角测量、机械内聚性能和水蒸气渗透率使我们得出结论，纳米石灰的最佳蒸腾性能不会因共聚物的存在而受到影响，并且即使存在 Poly(EMA/MA)，Ca(OH)2 纳米粒子的应用也能保持机械性能恢复的优异性能。
