D'Angelo Antonio, Dal Poggetto Giovanni, Piccolella Simona, Leonelli Cristina, Catauro Michelina
Department of Engineering, University of Campania "Luigi Vanvitelli", Via Roma n. 29, 81031 Aversa, Italy.
Department of Environmental, Biological and Pharmaceutical Sciences and Technologies, University of Campania "Luigi Vanvitelli", Via Vivaldi 43, 81100 Caserta, Italy.
Polymers (Basel). 2022 Aug 18;14(16):3380. doi: 10.3390/polym14163380.
Over the years, many materials have been used to restore buildings, paintings, ceramics, and mosaic pieces exhibiting different types of dyes and colour hues. Recently, geopolymers have been used for restoration purposes owing to their high chemical and mechanical resistance. In this work, white metakaolin was used to obtain white geopolymers, cured at 25 and 40 °C, as bulk materials to be coloured with synthetic organic dyes, i.e., bromothymol blue, cresol red, phenolphthalein, and methyl orange. These dyes were added during the fresh paste preparation to obtain dyed geopolymeric solids. Ionic conductivity and pH measurement confirmed the chemical stability of the consolidated materials, while FT-IR analyses were used to follow the geopolymerisation occurrences at different ageing times (from 7 to 56 days). Finally, the colour hues and properties were assessed in the CIELAB colour space before and after immersion in water.
多年来，许多材料被用于修复展示不同类型染料和色彩的建筑物、绘画、陶瓷和马赛克碎片。最近，地质聚合物因其高化学和机械抗性而被用于修复目的。在这项工作中，白色偏高岭土被用于制备白色地质聚合物，在25和40°C下固化，作为用合成有机染料（即溴百里酚蓝、甲酚红、酚酞和甲基橙）着色的块状材料。这些染料在新鲜糊剂制备过程中添加，以获得染色的地质聚合物固体。离子电导率和pH测量证实了固结材料的化学稳定性，而傅里叶变换红外光谱（FT-IR）分析则用于跟踪不同老化时间（从7天到56天）的地质聚合反应情况。最后，在浸入水中前后，在CIELAB颜色空间中评估颜色色调和性能。
