We study the synthesis and characterization of an innovative TEOS-based composite coating, which could improve previous formulations used in the field of monument conservation. The proposed coating is composed by a tetraethoxyorthosilicate matrix (TEOS), containing an elasticiser [hydroxyl-terminated polydimethylsiloxane (PDMS-OH)] and a non-ionic surfactant (n-octylamine). The specific self-cleaning and antifouling properties are obtained by the addition of different kinds of nanofillers: the commercial TiO₂ nanoparticles, plus two different silica nanocontainers, loaded with the commercial biocide 2-mercaptobenzothiazole. Through a multi-analytical approach, we evaluate the effect of the nanoparticles concentration on the coatings drying rate, on the variation of their visual aspect and textural properties. Our results show that the addition of the silica nanocontainers at 0.05% (w/v) in sol does not change the color of the coating and reduces the formation of cracks after drying. Moreover, the coating charged with nanocontainers undergoes slower drying, thus improving its penetration into the pores of the treated surface. Further tests of photocatalytic and biocidal properties of this new product on different lithotypes and their potential interactions are in progress.

我们研究了一种创新的基于TEOS的复合涂料的合成和表征，该涂料可以改善纪念碑保护领域中以前使用的配方。提议的涂料由四乙氧基原硅酸酯基质（TEOS）组成，该基质包含增韧剂[羟基封端的聚二甲基硅氧烷（PDMS-OH）]和非离子型表面活性剂（正辛胺）。通过添加不同种类的纳米填料可获得特殊的自洁和防污性能：商用TiO ₂纳米颗粒，再加上两个不同的二氧化硅纳米容器，其中装有市售的杀菌剂2-巯基苯并噻唑。通过多分析方法，我们评估了纳米粒子浓度对涂料干燥速率，其外观和质地特性变化的影响。我们的结果表明，在溶胶中添加0.05％（w / v）的二氧化硅纳米容器不会改变涂层的颜色，并减少了干燥后裂纹的形成。而且，装有纳米容器的涂层干燥较慢，因此提高了其渗透到处理过的表面的孔中的能力。这项新产品在不同光刻类型及其潜在相互作用上的光催化和杀生物特性的进一步测试正在进行中。