Abstract
Two sets of processed jute fabric viz, alkaline scoured-bleached and bioscoured-bleached jute fabrics were dyed separately with two nucleophilic addition type (vinyl sulphone type) of reactive dyes namely, Remazol Yellow FG and Amidazol Brown GR dyes. From the experiment it is revealed that bioscoured-bleached reactive dyed jute fabric shows higher dye uptake than that produced by alkaline scoured-bleached-reactive dyed jute fabric in case of both the vinyl sulphone type of reactive dyes. Biotreatment results in improvement of handle and wash fastness properties of jute fabric. Brightness of the shade was also improved in case of biotreatment-bleached-reactive dyed jute fabric.
Highlights
Jute is a biodegradable and renewable lignocellulosic fibre
Bioscouring: Grey jute fabric was scoured biochemically with cellulase enzyme (Ezysoft LCP, 4% owf), Xylanase enzyme (Texzyme J, 4% owf) and non-ionic surface-active agent (3% owf) in the same bath at a temperature of 50°C for 2 hours, keeping the material-to-liquor ratio at 1:10
Evaluation: Grey chemically scoured, bioscoured, chemically scoured-bleached, bioscoutred-bleached, chemically scoured-bleacheddyed and bioscoutred-bleached-dyed jute fabrics were evaluated by using different standards as under: a) Whiteness index: As per HUNTER scale b) Yellowness index: As per ASTM D1925 scale c) Brightness index: As per TAPPI 452 scale d) K/S value: As per Kubelka-Munk equation e) L, a, b values: As per computer colour matching system f) Wash fastness: As per IS:3361-1979 g) Light fastness: As per IS:2454-1967 h) Handle properties: As per IS:6490-1971 i) Tensile properties: As per ASTM D1682-1975
Summary
Jute is a biodegradable and renewable lignocellulosic fibre. It is very strong and used for application in technical textiles. Reactive dyes [1] are very popular for dyeing and printing of lignocellulosic fibres jute as this dye produce jute fabric with excellent fastness characteristics. Bioprocessing [2,3,4] of jute fabric makes the process ecofriendly and improves feel of the fabric by introducing some structural changes in jute fibre. In nucleophilic addition type of reactive dyes, the dye containing vinyl sulphone group is known as vinyl sulphone type of reactive dye. It is represented as RSO2-CH2-CH2OSO3Na. It is represented as RSO2-CH2-CH2OSO3Na It is marketed in soluble form as β-hydroxy ethylene sulphuric acid ester derivative. These dyes can be applied on jute at ambient condition
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