Cyclodextrins are known to form noncovalent inclusion complexes with various fluorescent dye molecules in aqueous solution. This interaction can result in an increase in fluorescence of the compound, which can modify the properties of the materials where they are applied.
In this study, the effect of the combined application of fluorescent whitening agents and hydroxypropyl-β-cyclodextrin to cotton fabrics was investigated. For this purpose, 4,4'-diamino-2,2'-stilbene disulfonic acid, an important precursor for the synthesis of fluorescent whitening agents, and C.I. Fluorescent Brightener 252 dye, a derivative of stilbene disulfonic acid widely used as an optical brightener for textiles, were chosen as model compounds. All samples were characterized by infrared spectroscopy and differential scanning calorimetry.
The evaluation of fabric performance showed that the addition of 0.75% hydroxypropyl-β-cyclodextrin increased the whitening effect by 15% and caused a slight improvement in terms of lightfastness. The washing fastness remained unchanged.
Introduction
β-cyclodextrins, especially in their more water-soluble derivative forms, are versatile complexing agents. They have been used to functionalize textile substrates, operating as controlled-release agents for water-insoluble substances such as flavorings or natural extracts, and in cosmetic textiles production.
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"This article was originally presented at the 88th Textile Institute World Conference Shah Alam, Selangor, Malaysia, May 2012".
About the Authors:
Morgane Le Fur and Graa M. B. Soares are associated with the University of Minho, Department of Textile Engineering, Portugal.
In this study, the effect of the combined application of fluorescent whitening agents and hydroxypropyl-β-cyclodextrin to cotton fabrics was investigated. For this purpose, 4,4'-diamino-2,2'-stilbene disulfonic acid, an important precursor for the synthesis of fluorescent whitening agents, and C.I. Fluorescent Brightener 252 dye, a derivative of stilbene disulfonic acid widely used as an optical brightener for textiles, were chosen as model compounds. All samples were characterized by infrared spectroscopy and differential scanning calorimetry.
The evaluation of fabric performance showed that the addition of 0.75% hydroxypropyl-β-cyclodextrin increased the whitening effect by 15% and caused a slight improvement in terms of lightfastness. The washing fastness remained unchanged.
Introduction
β-cyclodextrins, especially in their more water-soluble derivative forms, are versatile complexing agents. They have been used to functionalize textile substrates, operating as controlled-release agents for water-insoluble substances such as flavorings or natural extracts, and in cosmetic textiles production.
Read Full Article
"This article was originally presented at the 88th Textile Institute World Conference Shah Alam, Selangor, Malaysia, May 2012".
About the Authors:
Morgane Le Fur and Graa M. B. Soares are associated with the University of Minho, Department of Textile Engineering, Portugal.
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