Parametric study on microwave-assisted extraction of runo (Miscanthus sinensis Andersson) dye and its application to paper and cotton fabric

Issue Date

11-2020

Abstract

The study was designed to devise a high-yielding, microwave-assisted extraction of the colored material from the core tissue of runo (Miscanthus sinensis Andersson) stem. Soxhlet extraction of M. sinensis core tissue gave yields ranging from 1.04 % with dichloromethane to 11.91 % from 1:1 ethanol-water mixture. Folin-Ciocalteau tests showed that the extracts were primarily flavonoid compounds, accounting for 66.05 ppm of the total 1:1 ethanol-water extractable material. Initial application trials of the ethanol, ethyl acetate, and ethanol-water extracts followed by color fastness tests showed poor retention on both paper and cotton fabric, suggesting the need for a mordant. Subsequent trials with aluminum acetate as mordant showed greatly improved binding of the ethanol-water extracted dye onto the cotton fabric following wash, rubbing, and light fastness tests. A two-level, full factorial model extraction procedure to determine the effects of extraction time (15 s – 90 s), solvent volume (50 mL – 150 mL), and microwave power level (90 W – 540 W) was done for all solvents used. All three factors had a significant effect on the dye extraction yield, along with the interactions between duration-power level and volume-power level. The highest yield for microwave assisted extraction was at 15 s −150 mL – 540 W setting. Results suggest that microwave extraction can potentially produce dye extracts from M. sinensis core material with a faster throughput than simple soaking and Soxhlet extraction.

Source or Periodical Title

Biotechnology Reports

Volume

28

Issue

7

Page

1-8.

Document Type

Article

Physical Description

illustrations; tables; references

Language

English

Subject

Color fastness, Extract, Flavonoid, Microwave-assisted extraction, Miscanthus sinensis, Mordant

Identifier

DOI:10.1016/j.btre.2020.e00556

Digital Copy

yes

En – AGROVOC descriptors

COLOR FASTNESS; EXTRACT; FLAVONOID; MICROWAVE-ASSISTED EXTRACTION; MISCANTHUS SINENSIS; MORDANT

Link to Full Text

Share

COinS