Adhi Kusumastuti , - and Samsudin Anis , Teknik Mesin Unnes and Dewi Selvia Fardhyanti , - (2019) Production of natural dyes powder based on chemo-physical technology for textile application. IOP Conf. Series: Earth and Environmental Science , 258. pp. 1-8. ISSN 1755-1315

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Abstract

The application of natural dyes has been inseverable part of human life. Initially, natural dyes were the only colorants used for textile application. However, the invention of synthetic colorants at the end of the 19th century triggered a significant decrease in the wide and exclusive application of natural colorants. Research was conducted on various solvent type, temperature, and extraction time. Extraction temperature was varied at 70, 80, 90, 100, and 110oC, while extraction time was investigated at 60, 90, 120, 150, and 180 min. Volume ratio of dye material to solvent was 1:20. The dyestuff and solvent were separated by heating. Then dried using a spray dryer and the yield of the solid was weighed using balance. Investigation of effect of solvent type to total rendement found that methanol was the most suitable solvent for Brachiaria mutica extraction. The best condition for Brachiaria mutica extraction were temperature and time of 90 o C and 180 minutes, respectively. Investigation on solution pH revealed the optimum pH of 12.

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