Natural Dyeing of Cotton Fabric by Extruded Pelargonidin of Red Onion Skin and Finished it Naturally with Aloe Vera

Abstract

Eco-friendly and biodegradable materials caught significant attention all around the globe in recent times [1]. The idea of applying natural dyes on textile materials not only supports the cause but also bears a huge potential in terms of revolutionizing the field of textile. Increased awareness regarding the environmental issues has vastly encouraged the idea as natural dyes are biodegradable and better compatible with environment [2]. Natural dyes can be extracted from roots, leaves, flowers fruits which are basically parts of plants [3]. It can also be obtained from animals [3]. The dye molecules are pigment molecules having aromatic rings structure coupled with a side chain impart color to the material by resonating and also by virtue of the co-relation between the chemical structure and color plus chro-mogen-chromophore with auxochrome [4]. Onion skin is an easily available material to extract a particular natural dye from known as pelargonidin. There are four hydroxyl groups in a molecule which act as the auxochrome groups in order for the pelargonidin to impart good dyeing properties with a view to dyeing natural fibers [2]. Abstract Keywords: Red Onion Skin; Aloe vera; Cotton Fbric; Antibacterial; Color Fastness According to the opinion of the Ecologist, the Textile industry is regarded as the most polluting sectors. Almost every single day, various textile industries mostly Dyeing factories are ejaculating different toxic chemicals, dyes and other agents which are very much harmful to our nature and environment. As a result, the demand for natural dyes has increased abundantly. Natural dyes are environment friendly. In this project, we used onion outer skins as a potential source of natural plant dyes. These dyes, which are known as pelargonidin were applied on cotton fabric by the exhaust method. For proper fixation, drying and curing is carried out in Mini Thermosol Machine. The dyed sample was evaluated for color fastness to washing, light, rubbing and perspiration. The fastness properties were satisfactory. Natural plants that are used as antibacterial finishing agent have a greater market value. As a source of antibacterial finishing agent, Aloe vera leaf gel applied on Cotton fabric, which has been using as a medium to support the growth of microorganisms, is used. The antibacterial finish has been imparted to cotton by the pad-dry-cure method. The Aloe vera treated samples have been tested as per Parallel Streak method and found very high inhibition against bacteria.