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Halloysite nanotubes-based nanocomposites for the hydrophobization of hydraulic mortar
Journal of Coatings Technology and Research ( IF 2.3 ) Pub Date : 2021-09-10 , DOI: 10.1007/s11998-021-00522-9
Maria Rita Caruso 1, 2 , Lorenzo Lisuzzo 1 , Giuseppe Cavallaro 1, 2 , Stefana Milioto 1, 2 , Giuseppe Lazzara 1, 2 , Bartolomeo Megna 2, 3
Affiliation  

Abstract

The treatment of stone surfaces for their protection from ageing caused by natural and anthropogenic effects is an open issue in materials development for Cultural Heritage. We thought interesting to verify the suitability of a modified cellulose biofilm filled with halloysite nanotubes as wax compatibilizers to design a protecting layer. A hydraulic mortar was selected as a stone prototype. To improve the physico-chemical properties of the covering layer, wax microparticles have been incorporated to control transport, consolidation and wettability features. In particular, different application protocols have been studied, namely brushing and spraying, to assess whether the proposed procedures can be scaled up. Colorimetric analysis has been carried out to evidence the applicability in terms of color alteration after the treatment. Water adhesion was investigated by measuring the contact angle values as a function of time to obtain information on spreading and adsorption phenomena. These physico-chemical properties have been correlated to the microstructure evidenced by both electron and optical microscopies.

Graphic abstract



中文翻译:

基于埃洛石纳米管的纳米复合材料用于液压砂浆的疏水化

摘要

石材表面处理以防止自然和人为影响引起的老化是文化遗产材料开发中的一个悬而未决的问题。我们认为验证填充埃洛石纳米管的改性纤维素生物膜作为蜡增容剂设计保护层的适用性很有趣。选择了一种液压砂浆作为石材原型。为了改善覆盖层的物理化学性质,已加入蜡微粒以控制传输、固结和润湿性特征。特别是,已经研究了不同的应用协议,即刷涂和喷涂,以评估所提出的程序是否可以扩大规模。已进行比色分析以证明处理后颜色变化方面的适用性。通过测量作为时间函数的接触角值来研究水粘附,以获得关于扩散和吸附现象的信息。这些物理化学特性与电子显微镜和光学显微镜所证明的微观结构相关。

图形摘要

更新日期:2021-09-10
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