Abstract In the present study a novel methodology was developed for the assessment of surface cleaning treatment of acrylic emulsion paints, with the use of Pyrolysis–Gas Chromatography/Mass Spectrometry (Py–GC/MS). In order to assess the degree of invasiveness of surface treatments applied on acrylic emulsion paints, Py–GC/MS was employed for the direct analysis of the cleaning extracts, aiming to simultaneously detect the main organic components of the acrylic emulsion paints extracted from the paint during cleaning. Commercial acrylic emulsion paints were chosen for the study, containing four different synthetic organic pigments: Hansa yellow (PY3), diketopyrrolopyrrole red (PR264), phthalocyanine blue (PB15) and phthalocyanine green (PG7). Mock ups of paint films were prepared and subjected to artificial soiling and thermal ageing. Py–GC/MS and Fourier Transform Infrared Spectroscopy in Attenuated Total Reflection mode (FTIR–ATR) were used for the identification of the main organic components found in the prepared acrylic paints. Cleaning tests were conducted simulating actual surface cleaning treatment conditions, using a set of different types of wet cleaning systems, including water, aqueous solutions with chelating agents, water in oil (w/o) microemulsion and a siloxane based w/o emulsion. For an integrated physicochemical and aesthetic approach towards the evaluation of the cleaning tests, in parallel with the Py–GC/MS analysis carried out on the cleaning extracts, the degree of soil removal was comparatively evaluated through visual observation and documented in macro and micro scale. Moreover, statistical analysis was performed in the aim of correlating the aesthetic and the physicochemical cleaning assessment results. The study showed that Py–GC/MS is very useful tool for assessing the cleaning of acrylic emulsions and the action of different cleaning systems, making possible to detect minor quantities of the paint's components, through the direct analysis of the cleaning extracts. Some new information on the impact of cleaning treatments on emulsion paints as regards the synthetic organic pigments and the acrylic binder is presented.

中文翻译：

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一种评估丙烯酸乳胶漆表面清洁度的新方法

摘要 在本研究中，开发了一种使用热解-气相色谱/质谱 (Py-GC/MS) 评估丙烯酸乳胶漆表面清洁处理的新方法。为了评估丙烯酸乳胶漆表面处理的侵入程度，采用Py-GC/MS直接分析清洗提取物，旨在同时检测从油漆中提取的丙烯酸乳胶漆的主要有机成分在清洁过程中。研究选择了商用丙烯酸乳胶漆，包含四种不同的合成有机颜料：汉莎黄 (PY3)、二酮吡咯并吡咯红 (PR264)、酞菁蓝 (PB15) 和酞菁绿 (PG7)。制备漆膜模型并进行人工污染和热老化。Py-GC/MS 和傅立叶变换红外光谱在衰减全反射模式 (FTIR-ATR) 中用于鉴定制备的丙烯酸涂料中发现的主要有机成分。清洁测试模拟了实际的表面清洁处理条件，使用一组不同类型的湿式清洁系统，包括水、含螯合剂的水溶液、油包水 (w/o) 微乳液和基于硅氧烷的 w/o 乳液。对于清洁测试评估的综合物理化学和美学方法，与对清洁提取物进行的 Py-GC/MS 分析并行，通过目视观察比较评估污垢去除程度，并在宏观和微观尺度上记录. 而且，进行统计分析的目的是将美学和物理化学清洁评估结果相关联。研究表明，Py-GC/MS 是一种非常有用的工具，可用于评估丙烯酸乳液的清洁和不同清洁系统的作用，可以通过直接分析清洁提取物来检测少量油漆成分。介绍了一些关于清洗处理对合成有机颜料和丙烯酸粘合剂对乳胶漆的影响的新信息。通过对清洁提取物的直接分析。介绍了一些关于清洗处理对合成有机颜料和丙烯酸粘合剂对乳胶漆的影响的新信息。通过对清洁提取物的直接分析。介绍了一些关于清洗处理对合成有机颜料和丙烯酸粘合剂对乳胶漆的影响的新信息。