Dyeing and colour fastness in cotton and wool, using natural extracts of sunflower petals, onion peel and cocoa shell

ABSTRACT

At the present time, the sustainable use of natural products in textiles is sought, in this work the dyeing of cotton and wool was carried out, with the extracts of sunflower petals, purple onion peel and cocoa shell. Applying concentrations of 50, 75 and 100% on the weight of the fiber to be dyed (cotton and wool), with three replicas. The color in each dyed fiber was measured, performing an ANOVA analysis and 5 color fastness tests were performed, with three replicates each. The ΔE value was obtained and a factorial statistical analysis was performed. As a result of dyeing, lighter colors were obtained in cotton than in wool. Regarding the color fastness, it was observed that they depended on the coloring extract applied. In the case of sunflower petals, the strength tests that most affected both fibers were washing at high temperatures and basic pH. For the purple onion peel a greater change in the wool fiber was observed. For the cocoa shell it was observed that the tests where there was more change for both fibers were those of domestic washing and at high temperatures.

摘要

目前，人们正在寻求天然产品在纺织品中的可持续利用，本研究利用向日葵花瓣、紫洋葱皮和可可壳提取物对棉花和羊毛进行染色. 按待染色纤维（棉和羊毛）重量的50%、75%和100%施用浓度，三份复制品. 对每种染色纤维的颜色进行测量，进行方差分析，并进行5次色牢度试验，每个试验重复3次. 这个Δ获得E值并进行析因统计分析. 由于染色，棉花的颜色比羊毛的颜色浅. 关于色牢度，据观察，它们取决于所用的染色提取物. 以向日葵花瓣为例，对两种纤维影响最大的强度试验是在高温和碱性pH条件下洗涤. 紫色洋葱皮的羊毛纤维变化较大. 对于可可壳，观察到两种纤维变化较大的试验是家用洗涤和高温试验.

KEYWORDS:

• Natural color
• natural fibers
• color fastness
• sunflower
• onion
• cocoa

关键词:

• 自然色
• 天然纤维
• 色牢度
• 向日葵
• 洋葱
• 可可

Acknowledgments

The present work was developed with internal support from the University of Guanajuato through the DAIP (Directorate of Research and Postgraduate Support) with the project entitled: “Dyeing natural fibers with natural dyes, for the production of collaborative handmade textile products with companies in the region” (GTO/967/2016). The student’s participation is appreciated: Jesús Guadalupe Álvarez Canelo, during the tests.

Additional information

Funding

This work was supported by the Universidad de Guanajuato.