Novel green coloration of cotton fabric. Part II: Effect of different print paste formulations on the printability of bio-mordanted fabric with madder natural dye

Purpose The purpose of this paper is to explore a new eco-friendly green textile dyeing. Natural plant Buddleja officinalis is traditionally used as yellow pigment addition in rice. It is worth developing its application and dyeing performance in cotton fabric. Design/methodology/approach Buddleja officinalis dried flower was extracted with ethanol aqueous. The extraction conditions including ethanol concentration, material to liquor ratio, extract time and temperature were optimized. Then cotton fabrics were dyed with Buddleja officinalis extraction under conventional and ultrasonic conditions. The effects of dyeing time, bath ratio, pH value of dyeing bath, dyeing temperature and mordants on K/S values were studied and the resulting color strength obtained by conventional and ultrasonic dyeing were compared. The ultraviolet (UV) transmittance of Buddleja officinalis dyed cotton fabric was also evaluated. Findings The color strength of the fabric dyed with Buddleja officinalis under ultrasonic conditions was higher than that under conventional conditions. Alum, Fe and Cu as simultaneous mordants improved the K/S value of the dyed cotton fabrics. Both washing fastness and rubbing fastness were fairly good in all Buddleja officinalis dyed cotton fabrics, washing fastness = 3–4 and rubbing fastness = 4. What’s more, the dyed cotton fabrics showed lower transmittance values as compared to undyed cotton fabrics and indicated potential UV protection capability. Practical implications Buddleja officinalis can be a new natural dye source for the ultrasonic dyeing of cotton fabric. Originality/value It is for the first time that Buddleja officinalis is used as a natural dye in cotton fabric dyeing with less water and the dyeing using ultrasound has been found to have an obvious improvement in the color strength and color-fastness.

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Dyeing of Cotton Fabric with Natural Dye obtained From Flower of Thespesia Populnea using Combination of Mordants

Journal of Environmental Nanotechnology ◽

10.13074/jent.2018.03.181301 ◽

2018 ◽

Vol 7 (1) ◽

pp. 12-16

Keyword(s):

Cotton Fabric ◽

Natural Dye ◽

Thespesia Populnea

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Chitosan as a Thickener for Direct Printing of Natural Dye on Cotton Fabric

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.610-613.3394 ◽

2012 ◽

Vol 610-613 ◽

pp. 3394-3397 ◽

Cited By ~ 2

Author(s):

Jiraporn Choomchit ◽

Jantip Suesat ◽

Sae Be Porntip

Keyword(s):

Sodium Alginate ◽

Cotton Fabric ◽

Natural Dye ◽

Color Fastness ◽

Fastness Properties ◽

Direct Printing ◽

Chitosan Concentration ◽

Color Yield

Development of chitosan as a thickener for direct printing of natural dye on cotton fabric was investigated. Chitosan was applied as a thickener at various concentrations and its effect on the print properties was determined in comparison with the typical printing thickener, sodium alginate. The results exhibited that chitosan affected the fabric properties by increasing fabric yellowness and stiffness. However, with increasing chitosan concentrations, the yellowness reduced only marginally. Direct printing on cotton fabric with 3% Natural Chestnut at varying chitosan concentrations showed that the optimum chitosan concentration for the printing was at 3%w/v, being equivalent to the viscosity of 17,800 mPa. The 3%w/v chitosan imparted the ultimate color yield, print outline sharpness and a minimal dye bleeding on the unprinted area of the fabric. Use of chitosan concentration higher than 3%w/v led to poor print properties on the fabric. The efficiency as a thickener of chitosan was found to be superior to sodium alginate. A high color yield and good color fastness properties on cotton fabric were rendered in the case of chitosan thickener at the same applied concentration with sodium alginate.

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