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

Abstract

Highlights Miscanthus sinensis , an invasive plant species as potential source of commercial dyes. Microwave extraction can yield dye extracts from M . sinensis . Optimum condition is at 15 s −150 mL solvent - 540 W microwave power setting. Extraction using 1:1 ethanol-water mixture had highest yield and color-fastness. Mordant application improves binding of flavonoid-based M . sinensis dyes on fabric.

Eco-friendly bio-dyeing of bio-treated nylon fabric using Esfand (P. harmala) based yellow natural colorant

“…22,35 The results given in Figure 2(a) show that the irradiation of aqueous extract for 6 min. have caused good color yield by rupturing of cell wall of the seed 36,37 The potent molecules interact with medium promisingly through potential mass transfer Kinetics. 29 Upon change of medium (Figure 2(b)) the acidic extract after exposure to microwave treatment rays for 4 min.…”

A critical look at challenges and future scopes of bioactive compounds and their incorporations in the food, energy, and pharmaceutical sector

“…Energy associated with these microwaves is converted to thermal energy as the moisture present within the cells starts to evaporate due to ionic conduction as well as dipole rotation, two phenomena associated with microwave technology (Zghaibi et al 2019 ). As a result, the cells experience a pressure build-up, eventually causing them to rupture, thus releasing the bioactive compounds (Pinzon et al 2020 ). This technique has gained a lot of interest due to its ability to use extraordinarily little quantities of solvents and rapid extraction times, as well as greater reproducibility and control of process conditions such as temperature and pressure (Milani et al 2020 ).…”

“…This technique has gained a lot of interest due to its ability to use extraordinarily little quantities of solvents and rapid extraction times, as well as greater reproducibility and control of process conditions such as temperature and pressure (Milani et al 2020 ). The principles involved in this technique also facilitate a homogeneous temperature distribution, which also aids in higher yields and favorable heat and mass transfer from the sample to solvent (Pinzon et al 2020 ). Table 5 provides an overview of the sources and various compounds extracted using this technique, along with the necessary parameters required for optimal yields.…”

“…The principles involved in this technique also facilitate a homogeneous temperature distribution, which also aids in higher yields and favorable heat and mass transfer from the sample to solvent (Pinzon et al 2020). Table 5 provides an overview of the sources and various compounds extracted using this technique, along with the necessary parameters required for optimal yields.…”

“…Other interesting properties, such as flame retardancy, antibacterial, and UV light protection in textiles have been achieved by using tannin-based macromolecules (Basak et al 2021). Dyes, such as the run dye from the core stem tissues of Miscanthus sinensis Andersson (Pinzon et al 2020) and naturally sourced anthraquinone dyes from the roots of Rubia tinctorum L. (Agnhage et al 2017), have also been produced.…”