Dyeing methods that conform to environmental protection requirements and adapt to the development of industry are investigated using bleached poplar wood dyed with melanin secreted by Lasiodiplodia theobromae in this paper. Prolonging the dyeing time of coarse melanin can improve the dye uptake of veneers, and the brightness value increases, and the reflectivity declines with the increase of dyeing time. The stained surface of the vessel is gradually covered by coarse melanin dye, and more melanin particles can be clearly observed accumulating together on the stained surface with agar. Infrared measurements show that the absorption peak of -C=O in carboxylic acid disappears at 1740 cm-1, which can be attributed to the fact that -C=O (1776 cm-1) in an anhydride or ketone group is formed by further oxidation and condensation of agar and NaOH. The veneer dyed for 6 h showed a well light and water resistance. Additionally, dyeing can improve the wettability of water, phenolic resin, and urea formaldehyde resin on the surface of veneer. These results support the use of pigment secreted by stain fungi for wood and provide data for evaluating their use as sustainable materials for other applications.

中文翻译：

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微生物染料：从木材中分离出的Lasiodiplodia theobromae分泌的黑色素对杨木贴面进行染色。

本文研究了用Thelaromodae分泌的黑色素染色的漂白杨木，研究了符合环保要求并适应工业发展的染色方法。延长粗黑色素的染色时间可以提高单板的染色吸收率，亮度值增加，反射率随染色时间的增加而下降。血管的染色表面逐渐被粗糙的黑色素染料覆盖，并且可以清楚地观察到更多黑色素颗粒与琼脂一起聚集在染色表面上。红外测量表明，羧酸中-C = O的吸收峰在1740 cm-1处消失，这可以归因于以下事实：酸酐或酮基中的-C = O（1776 cm-1）是通过进一步形成的。琼脂和NaOH的氧化和缩合。染色6小时的贴面显示出良好的耐光性和耐水性。另外，染色可以改善单板表面上水，酚醛树脂和脲醛树脂的润湿性。这些结果支持了染色真菌分泌的颜料在木材中的使用，并提供了评估其用作其他用途的可持续材料的数据。