Abstract
The extraction of Indigofera Tinctoria Linn leaf into natural dyes was studied using two methods: maceration and ultrasonication. Other variables tested were the differences in the degree of solvent acidity used: neutral, alcoholic, acid and base. The yield and the dye strength measured by the absorbance are response to the change of those variables. The better yields were obtained from ultrasonication method compared to the maceration one. The highest yield was shown in the result of maceration method at neutral condition, 2.3%, while in ultrasonic method was at alcoholic condition 13%. The acidity of the solvent affects the resulted colour. By using maceration method and the neutral condition produced dark blue, the acid solvent produced a grey dye, the alkaline produced a greenish dye and the alcoholic produced a brownish dye. With the aid of ultrasonication, blue dye was generated on the use of neutral, acid and alcoholic solvents, whereas brownish was on alkaline solution.
Highlights
Colouring textile using synthetic dyes have a high negative impact towards both environment and human beings that are involved in the manufacturing process to the user
This study deals with the extraction of dyes from Indigofera Tinctoria Linn to investigate the different methods of extraction and solvents used
This study researched the method of dye extraction from Indigofera Tinctoria Linn plant using water under acidic, alkaline, alcoholic and neutral conditions done conventionally as well as with the help of ultrasonic wave
Summary
Colouring textile using synthetic dyes have a high negative impact towards both environment and human beings that are involved in the manufacturing process to the user. The increased awareness of environmental and health hazards associated with synthesis, processing and use of synthetic dyes has created an interest in naturally dyed textiles (Mongkholrattanasit et al 2010). This is encouraged because natural sources of dyes such as from plants, insects, minerals and fungi are in abundance. Indigofera is a native plant of East and Southern Africa that has been introduced to Laos, Vietnam, Philippines and Indonesia (Sumatera, Java, Sumba and Flores) (Mualimin 2013). Corresponding author: Chemical Engineering Department, Faculty of Engineering, Universitas Muhammadiyah Surakarta, Kartasura, Surakarta, Indonesia, 57102 E-mail: nur.hidayati @ums.ac.id.
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call