Abstract

This article will discuss natural dyes’ role, from colouring the cotton fabrics with some functionality to harvesting sunlight in the dye-sensitized solar cells. Natural dye colourants are identical to the low light- and wash-fastness. Therefore, an approach to improving the colourant’s physical properties is necessary. Colouring steps employing silica nanosol and chitosan will be presented. The first part will be these multifunctional natural dye coatings on cotton fabrics. Then, functionality such as hydrophobic surfaces natural dyed cotton fabrics will be discussed. Natural dyes are also potential for electronic application, such as solar cells. So, the second part will present natural dyes as the photosensitizers for solar cells. The dyes are adsorbed on a semiconductor oxide surface, such as TiO2 as the photoanode. Electrochemical study to explore natural dyes’ potential as sensitizer will be discussed, for example, natural dyes for Batik. Ideas in improving solar cell efficiency will be discussed by altering the photoanode’s morphology. The ideas to couple the natural dyes with an organic–inorganic hybrid of perovskite and carbon dots are then envisaged.

Highlights

  • The development of the concept of eco-fashion or sustainable textiles has led to the development of dyeing technology using natural dyes that care about aspects of water pollution, the sustainability of raw materials and processed products, biodegradability and other environmentally friendly attributes [1]

  • Past researches have endorsed essential growth in the application of the natural dyes for fabrics, but still there are a number of technical challenges of natural dye application that must be overcome

  • The composite formation with green resources such as chitosan, silica may result in enhance dyeing performance to cotton fabrics

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Summary

Introduction

Technology is a means to achieve enhanced goals towards advancing human civilization, as is textile dyeing technology. The development of the concept of eco-fashion or sustainable textiles has led to the development of dyeing technology using natural dyes that care about aspects of water pollution, the sustainability of raw materials and processed products, biodegradability and other environmentally friendly attributes [1]. Natural dyes that are currently often used for Batik production besides indigo blue are Tingi (Ceriops tagal) natural dyes This dye is obtained from the extraction of the bark of the Tingi tree, a type of mangrove plant, which has a high tannin content and is used as a dye for Batik and tanners. Potential of this natural dyes will be explored in the fourth section. Some ideas to improve the performance of the natural dyes solar cell will be envisaged in the concluding remarks

Improving the wash-fastness of the natural dyed cotton fabrics
Hydrophobic surfaces on natural dyed cotton fabrics
Natural dyes for dye-sensitized solar cells
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Findings
Concluding remarks

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