Enhancement of lac dye adsorption on cotton fibres by poly(ethyleneimine)

Janhom, Sorapong; Griffiths, Peter C.; Watanesk, Ruangsri; Watanesk, Surasak

doi:10.1016/j.dyepig.2004.02.007

Cited by 57 publications

(23 citation statements)

References 8 publications

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“…Owing to the several good properties it has, cotton plays most prominent role in apparel industry. Cotton possesses many useful characteristics such as comfort, it is soft to the hand, has good absorbency, color retention, good strength, (Mondal and Hu 2007; Janhom et al 2004). Hydrochloric acid (36.5-38%) and N,N-Dimethylacetamide (DMAc, anhydrous, 99.8%) were purchased from Sigma Aldrich, USA.…”

Section: Methodsmentioning

confidence: 99%

Effect of chitosan and ions on actuation behavior of cellulose–chitosan laminated films as electro-active paper actuators

2007

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Cellulose-chitosan laminated films were made for Electro-Active Paper (EAPap) actuators and the effect of chitosan and different types of free ions namely, Cl À , NO 3 À and CF 3 COO À were investigated on the actuation behavior. The fabrication process of the films was explained and the actuation performance was tested in terms of bending displacement of the actuators. It was observed that, chitosan content and type of free ions influence the tip displacement of the actuators. Cl À was found the best free ion among others, and detail observations are explained. By laminating chitosan layer on the cellulose films, the humidity sensitiveness of cellulose EAPap actuators was reduced.

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Section: Methodsmentioning

confidence: 99%

Effect of chitosan and ions on actuation behavior of cellulose–chitosan laminated films as electro-active paper actuators

2007

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“…The lac dye extracted from the stick lac has high potential in many fields of applications. For example, it is used as a cosmetics ingredient, for coloring food, oil painting and dyeing textiles (Moeyes 1993;Chairat et al 2005;Janhom et al 2004;Kongkachuichay et al 2002;Kamel et al 2007;Boonla and Saikrasun 2013;Sribenja and Saikrasun 2015). The main components in the soluble part of the stick lac are consisted of anthraquinone-based components.…”

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confidence: 99%

Thermo-oxidative and weathering degradation affecting coloration performance of lac dye

Nacowong

Saikrasun

2016

Fash Text

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Thermo-oxidative stability of lac dye was studied by simultaneous thermogravimetry (TG) and differential scanning calorimetry under nonisothermal and isothermal modes in air. The thermal stability change of lac dye was characterized by FTIR and UV–Vis spectroscopy. The TG profiles of lac dye showed at least three steps of mass loss. The first mass loss (about 8 %) found in the range of 40–150 °C mainly corresponded to the evaporation of moisture whereas the next two major steps were found with mass losses of 50 (150–440 °C) and 25 % (440–550 °C). The FTIR results indicate that the degradation of the major mass loss step (150–440 °C) mainly involved the thermo-oxidative reaction at carboxylic groups in conjugation with the C=C bonds of the anthraquinone ring. The absorbance profiles of lac dye solutions showed that the remarkable drop of absorbability was observed when the dye was heated to elevated temperatures (>150 °C). The results obtained from isothermal investigation also indicated the thermo-oxidative stability dependence of heating temperature. The apparent activation energy of lac dye calculated using isoconversional methods was higher under dynamic than under isothermal heating. Long period of weathering exposure mainly affected the O–H bonds of hydroxyl and carboxylic groups, and hence lowering the absorbability of lac dye. These results provided helpful information that can give support in the maintenance, preparation, dyeing and application stages of lac dye.

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Section: Dyeing Methodsmentioning

confidence: 99%

“…Then yarns were dyed for one hour (in case of Cochineal dye) and for 30 minutes (in case of Turmeric and Madder) and the dyed samples were rinsed with cold water and washed for 30 minutes in a bath containing 3 g/L of non-ionic detergent at 45°C. Finally, the yarns were rinsed and air dried [19][20][21].Pre-mordanting of wool yarns: The pre-mordanting method was used in case of dyeing wool yarns with dyes extracted from Cochineal, Turmeric and Madder using alum salt, copper salt, and chromium salt. The mordant was dissolved and added to the bath with liquor ratio 1:50.…”

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confidence: 99%

Impacts of Air Pollution on Colour Fading and Physical Properties of Wool Yarns Dyed with Some Natural Dyes in Residential Site

Hm¹,

AA²

2015

J Textile Sci Eng

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Experimental MaterialsNatural colouring matter: Colouring substance used in this work was extracted from Cochineal as an animal source, Turmeric and Madder plants as a planted source.Fabrics: Wool yarns were kindly supplied by El Mehalla spinning and weaving Company, Egypt. Mordents:The following mordants were used: alum salt, copper salt, tin salt and iron salt. They were of pure grade chemicals. MethodsExtraction of natural coloring matter: Cochineal dye (10 g/L) was immersed in water for 12 hours and then boiled for 15 minutes. Turmeric dye (powder form) was immersed in water with 15 g/L concentration for 12 hours and then boiled for 60 minutes. Madder dye (powder form) was immersed in water with 17 g/L concentration for 12 hours and then boiled for 60 minutes. At the end, the solution was filtered off and left to cool down [15][16][17][18]. Dyeing methodsDyeing of wool yarns using traditional method: Wool yarns samples (10 gm each) were dyed with the dye extracted from Cochineal, Turmeric and Madder at liquor ratio 1:50. Dyeing was carried out at pH (4-5). Yarns samples were entered to the dyeing solution in a water bath at 70°C for 15 minutes. Then yarns were dyed for one hour (in case of Cochineal dye) and for 30 minutes (in case of Turmeric and Madder) and the dyed samples were rinsed with cold water and washed for 30 minutes in a bath containing 3 g/L of non-ionic detergent at 45°C. Finally, the yarns were rinsed and air dried [19][20][21].Pre-mordanting of wool yarns: The pre-mordanting method was used in case of dyeing wool yarns with dyes extracted from Cochineal, Turmeric and Madder using alum salt, copper salt, and chromium salt. The mordant was dissolved and added to the bath with liquor ratio 1:50. Then wetted wool samples were added to the mordanting bath and the whole brought slowly to 90°C for one hour. It was then allowed to cool at room temperature and the wool samples were removed and squeezed. Mordanted wool should be used at once because some mordants are very sensitive to light [22].Post-mordanting method was used in case of dyeing wool yarns with dyes extracted from Cochineal, Turmeric and Madder using iron salt and tin salt. In this method the mordant was added to the bath for the final ten minutes of simmering. The fabrics were lifted out while the AbstractWool yarns are dyed with natural colouring matter extracted from Cochineal, Turmeric and Madder using exhaustion method. These dyed yarns are pre-mordanted with different types of mordants. Different measurements have been carried out for the dyed wool yarns after exposure to air pollution in residential site (Kalla region) for one year. These measurements values include colour data (K/S, L*, a*, b*, ΔE, hue and chroma) and physical properties (tensile strength, tenacity and elongisity). Also, the present work studied the air pollution in (Kalla region), through determination of the suspended and deposited particulate matter and sulpher dioxide concentrations for different periods of time in one year.

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Enhancement of lac dye adsorption on cotton fibres by poly(ethyleneimine)

Cited by 57 publications

References 8 publications

Effect of chitosan and ions on actuation behavior of cellulose–chitosan laminated films as electro-active paper actuators

Effect of chitosan and ions on actuation behavior of cellulose–chitosan laminated films as electro-active paper actuators

Thermo-oxidative and weathering degradation affecting coloration performance of lac dye

Impacts of Air Pollution on Colour Fading and Physical Properties of Wool Yarns Dyed with Some Natural Dyes in Residential Site

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