Pigment Synthesis for the Exploration of Binding Media Using a Lead-Free Alternative to Chrome Yellow
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Anne C. Gaquere-Parker [1] ; Patricia S. Hill [2] ; Michael P. Haaf [3] ; Cass D. Parker [4] ; N. Allie Doles [1] ; Amanda K. Yi [1] ; Todd A. Kaminski [1]
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[1] University of West Georgia
University of West Georgia
Estados Unidos
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[2] Millersville University
Millersville University
Borough of Millersville, Estados Unidos
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[3] Ithaca College
Ithaca College
City of Ithaca, Estados Unidos
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[4] Clark Atlanta University
Clark Atlanta University
Estados Unidos
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- Localización: Journal of chemical education, ISSN 0021-9584, Vol. 94, Nº 2, 2017, págs. 235-239
- Idioma: inglés
- Texto completo no disponible (Saber más ...)
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Resumen
Generating enthusiasm among nonscience majors in a laboratory course is a difficult task. Often, students are asked to perform a precipitation reaction, only to collect and then safely dispose of the solid without detailing composition, properties, or uses. In an effort to keep the students engaged, this laboratory exercise presents an innovative way to use the product of a precipitation reaction. The reaction chosen produces basic zinc(II) chromate, a yellow pigment that can be combined with various paint binders such as beeswax, gum Arabic, egg yolk, linseed oil, and acrylic medium. The students then test their paints on a canvas and analyze their different physical properties. This exercise can be tailored to match different undergraduate levels, ranging from nonscience majors to chemistry majors and be used as a part of a STEAM (science, technology, engineering, arts, and mathematics) activity. A brief discussion on historical paint binders and their chemistry is also included.
