Preliminary Exploration of the Red Pigment from Scytalidium cuboideum as a Cellulosic Pulp Colorant

Derek W. Stone, Sarath M. Vega Gutierrez, Zielle M. Walsh and Seri C. Robinson
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Derek W. Stone: Chemical, Biological and Environmental Engineering, Oregon State University, Corvallis, OR 97331, USA
Sarath M. Vega Gutierrez: Department of Wood Science & Engineering, Oregon State University, Corvallis, OR 97331, USA
Zielle M. Walsh: Biology—Genetics, Oregon State University, Corvallis, OR 97331, USA
Seri C. Robinson: Department of Wood Science & Engineering, Oregon State University, Corvallis, OR 97331, USA

Challenges, 2022, vol. 13, issue 1, 1-7

Abstract: Pollution from the international dye industry continues to be a global problem. Biotechnology offers new options, including a closer look at select wood decay fungi to replace inorganic dyes. The pigments produced by a small group of soft rotting fungi are generally naphthoquinonic and remarkably stable. From this group, the dramada crystals, produced by Scytalidium cuboideum, are of particular interest. To test the application of this pigment as a natural colorant of cellulosic pulps, four different bleached pulps were selected (one hardwood, three softwood), in three different mediums (acetone, ethanol, and DI water). The pigment generated a significant change of color, but there was no significant difference in color intensity based on the solvent carrier. These preliminary results are promising as they open the door for further exploration of applications of fungal pigments in the paper industry. Once these pigments can be reliably grown, they will offer a sustainable organic alternative to polluting inorganic dyestuffs and help reduce the toxic effluent released into the soil and waterways.

Keywords: pulp; softwood; hardwood; spalting; Scytalidium cuboideum; pigment dye; colorant (search for similar items in EconPapers)
JEL-codes: A00 C00 Z00 (search for similar items in EconPapers)
Date: 2022
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