Method for dyeing cotton at low temperature by edible pigment
A food coloring and cotton dyeing technology, which is applied in the field of textile dyeing, can solve the problems of difficult degradation of dyeing wastewater, high pH value of dyeing wastewater, and increased difficulty in sewage treatment, so as to improve dyeing rate, color fastness to soaping, The effect of improving color fastness
Pending Publication Date: 2021-08-31
NANTONG UNIVERSITY
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Abstract
The invention provides a method for dyeing cotton at low temperature by using edible pigment. The method comprises the following steps of dissolving the edible pigment and carboxymethyl chitosan in deionized water, adjusting the pH value of a solution to 5-6 by using sodium hydroxide, heating the solution to 50-60 DEG C, adding laccase, and uniformly stirring to obtain a cotton dyeing solution with the dyeing bath ratio of (30: 1)-(10: 1); and adding cotton, reacting for 4-5 hours, washing and drying the cotton, and thus obtaining the edible pigment enzymatic dyed cotton. Compared with a traditional dyeing process, the method has the advantages that the use of chemical auxiliaries is reduced, environment-friendly auxiliaries are used, the cost is reduced, the dyeing temperature is 50-60 DEG C, and the energy loss is greatly reduced. The edible pigment used in the invention is natural edible pigment, such as tea polyphenol extracted from tea leaves, or synthetic edible pigment, such as carmine, brilliant blue and lemon yellow. The used edible pigment is green, safe, harmless, energy-saving and environment-friendly.
Application Domain
Dyeing process
Technology Topic
Food coloringChemistry +7
Examples
- Experimental program(4)
- Effect test(1)
Example Embodiment
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PUM
Property | Measurement | Unit |
Areal density | 175.4 | g/m² |
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