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Abstract(s)
A solidez à luz dos materiais têxteis tingidos tem sido um foco de estudo na área têxtil, de modo a tentar melhorar a resistência da cor à luz, aumentando a qualidade e a durabilidade do produto final. Com base nessa preocupação, tentou-se arranjar uma solução que funcione de uma forma mais completa do que as já estudadas a nível laboratorial, que consistem na formulação de um produto de acabamento. Para melhorar a solidez à luz, especificamente na gama de corantes reativos, foram estudados vários produtos com uma das seguintes propriedades: absorver a radiação ultravioleta, impedindo que esta degrade o corante ou ter capacidade antioxidante, para que, mesmo que a luz incida diretamente no corante, não o consiga oxidar. Após os vários testes de solidez à luz, complementados com testes de solidez à lavagem e solidez à fricção, verificaram-se melhores resultados com a utilização dos produtos antioxidantes, tendo especial impacto a utilização de extrato de sumagre na melhoria da solidez, o que é um resultado bastante interessante e a explorar melhor num contexto industrial.
Light fastness of dyed textile material has been a focus of research in this field, in order to improve the resistance of the color to the light, improving the quality and the durability of the end product. Based on this, an attempt has been made to create a solution that works more completely than those already studied at the laboratory level, which consist of the formulation of a finishing product. To improve light fastness, especially in reactive dyes, several products will be study, as long as they have one of the following properties: absorb UV radiation, prevent them from degrading dye or have antioxidante capacity, so that even light falls on the dye directly, has no ability to oxidize it. After all light fastness tests, supplemented with wash fastness and rubbing fastness tests, it was found that the best results were obtained with the use of antioxidante products, especially sumac extract, which gave a very good and interesting result to explore industrially.
Light fastness of dyed textile material has been a focus of research in this field, in order to improve the resistance of the color to the light, improving the quality and the durability of the end product. Based on this, an attempt has been made to create a solution that works more completely than those already studied at the laboratory level, which consist of the formulation of a finishing product. To improve light fastness, especially in reactive dyes, several products will be study, as long as they have one of the following properties: absorb UV radiation, prevent them from degrading dye or have antioxidante capacity, so that even light falls on the dye directly, has no ability to oxidize it. After all light fastness tests, supplemented with wash fastness and rubbing fastness tests, it was found that the best results were obtained with the use of antioxidante products, especially sumac extract, which gave a very good and interesting result to explore industrially.
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Keywords
Solidez à luz Algodão Corantes reativos Absorvedores UV Antioxidantes Light fastness Cotton Reactive dyes UV absorbers Antioxidants