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Extraction of Henna Leaf Dye and Its Dyeing Effects on Textile Fibre

M. M Alam
BCSIR Laboratories, Rajshahi-6206, Bangladesh

M. L. Rahman
BCSIR Laboratories, Rajshahi-6206, Bangladesh

M. Z. Haque
BCSIR Laboratories, Rajshahi-6206, Bangladesh

Abstract/ Executive Summary:

Henna plant leaves (Lawsonia inermis) contains dye along with other ingredients. The dye component was extracted and applied on silk fibre in order to investigate the dyeing characteristics, e.g. dyeability, fastness etc. It is found that the dye up take by silk fibre was decreased with the increase of dye concentration. Similarly the absorp-tion of dye was increased with the decrease of dye concentration. The maximum dye absorption has been observed at 0.9 % dye with 10% alum for the period of 65 min-utes at temperature 80ºC and pH 4. At this optimum condition the dye absorption was 93%. The effects of sunlight in air on silk fibre have been studied to investigate the colourfastness. The colourfastness of dyed silk fibre of water and soap solution at different treatment temperature was satisfactory. Considering dyeability and colour-fastness, dye from henna matured leaves was highly applicable on dyeing of silk fibre as well as other protein fibre.

Keywords: Henna Leaf Dye, Textile, Fibre

Location: BCSIR campus, Rajshahi.

Start Date:

End Date:

Program Area: Development of Host and Medicinal Plants

Commodity: Medicinal Plants,

Objectives:

To determind extraction of henna leaf dye and its dyeing effects on textile fibre.

Methodology:

The plant Lawsonia inermis (locally known as Mendi) was collected from the BCSIR campus, Rajshahi. The dried mature leaves were crushed into powder for effective extraction. Mulberry silk (improved multi-voltine vari-ety) fibre was collected from Bangladesh Sericulture Research and Training Institute (BSR & TI), Rajshahi, Bangladesh. These fibre were sized by a sizing machine from the technological section of BSR & TI. The dried plant leaves were washed with water to remove the adhering materials. The leaves were then dried in an oven at 40ºC for 24 hours and finely powdered with the help of a grinding machine.100 g dried leaves powder sample was taken in saturated Na₂CO₃ solution for 24 hours at pH 8.5-9.2 at room temperature. The solution becomes reddish orange colour. Then perco-lated with Na₂CO₃ solutions until all of the colour has been removed and then filter again. The reddish orange colour was devel-oped due to the presence of alkali. The alkali reddish orange colour solution was acidified with hydrochloric acid at pH 4-5.After acidification the colour of solution change from reddish orange to yellow orange. This colour is developed by the action of acid. The acidified colour solution was taken into separating funnel and shaken with successive portion of chloroform (until 1ml of chloro-form extract imparted no colour on shaking with 1ml of sodium carbonate solution). The chloroform extract was dried with anhydrous sodium sulfate and filtered. The chloroform extract produce a orange yellow colour, this solution kept away from light until all the chloroform were vaporized. Then cauli-flower like clusters of needles with dark mahogany colour crystalline mass of about 7.05 g was obtained and is preserved for fur-ther investigation. For degumming, soap solution (wheel soap) of strength 3.5 g/litre was prepared and its pH was adjusted to 10.0-10.5. Degumming was conducted at a temperature 95-100 ºC for 1 hour. Then silk fibre was transferred into 2nd bath and heated for 45 min. at the same tem-perature. After degumming the silk fibre was washed well with hot distilled water for 3-4 times. The extracted dye from the leaves was spar-ingly soluble in cold water with an orange yellow colour. The dye baths were prepared by adding required amount of dye (0.9 % on the basis of fibre) and alum as an electrolyte (10 % on the basis of the fibre). The pH of dye bath was maintained at 3 by adding acetic acid and sodium acetate. The fibre liquor ratio was maintained at 1:20 during dyeing operation. Before immersing the silk fibre in dye bath it was soaked well in dis-tilled water and squeezed for even absorption of dye particles. Dyeing was started at 30ºC, the temperature was then slowly increased almost to the 90ºC within about 10 min. and continued for 60 min. with occasional stir-ring by a glass rod and then allowed for further 30 min. as the bath cools down. During dyeing, boiling distilled water was added to the dye baths in order to maintain the level content. After dyeing the fibres were squeezed over dye baths. The fibre material was washed with distilled water (two times) and then dried at room temperature.

Source of Information: Bangladesh J. Sci. Ind. Res. 42(2), 217-222, 2007

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

From the experiment it was observed that bright and uniform shades were produced when degummed silk fibre was dyed with 0.8 % dye. Above or below these percentages of dyes dull and uneven shades were obtained. The effective concentration of dye e.g., 0.8 % dye corresponding to 88 % dye exhaustion from the dye bath. The behavior of dye absorption in dyeing of degummed silk fibre depends upon the characteristics of dye towards the fibre.

Knowledge Management: Journal