Department of Chemistry and CSGI, University of Florence, via della Lastruccia 3 - 50019 Sesto Fiorentino, Florence, Italy.
Langmuir. 2012 Feb 28;28(8):3952-61. doi: 10.1021/la2044619. Epub 2012 Feb 16.
Acrylamide chemical gels have been synthesized to obtain systems with mechanic and hydrophilic properties suitable for the cleaning of works of art. The gel characteristics were tailored by changing the polymer percentage present in the final hydrogel formulation from 2 to 10% w/w. Two different hydrogels have been selected in this interval for an in depth characterization (i.e., S 4% w/w and H 6% w/w). Water retention properties of the gels along with the free water index have been determined by the combination of standard dehydration tests and differential scanning calorimetry (DSC) measurements. The gels' structure has been determined by scanning electron microscopy (SEM) and small angle X-ray scattering (SAXS). The water retention capacity of hydrogel, H, was also determined. Cleaning tests on easel painting replicas, performed with both hydrogels loaded with an aqueous detergent system, showed good results in the removal of a widely used synthetic adhesive and hence offered these gels as a real alternative to the widely applied physical gel methodology with the advantage of being a residue-free technique. A preliminary SAXS investigation confirms the persistence of the detergent system nanostructure inside the hydrogel.
丙烯酰胺化学凝胶已被合成，以获得具有机械和亲水性能的系统，适用于艺术品的清洁。通过改变最终水凝胶配方中存在的聚合物百分比（2 至 10%w/w）来调整凝胶特性。在这个范围内选择了两种不同的水凝胶进行深入表征（即 S 4%w/w 和 H 6%w/w）。通过标准脱水测试和差示扫描量热法（DSC）测量相结合，确定了凝胶的保水性能和游离水指数。通过扫描电子显微镜（SEM）和小角 X 射线散射（SAXS）确定了凝胶的结构。还确定了水凝胶 H 的保水能力。用负载水基洗涤剂系统的两种水凝胶对画架画复制品进行的清洁测试表明，在去除广泛使用的合成胶方面效果良好，因此为这些凝胶提供了一种真正的替代广泛应用的物理凝胶方法的选择，其优点是无残留技术。初步的 SAXS 研究证实了洗涤剂系统纳米结构在水凝胶中的存在。
