Extraction of natural dyes for textile dyeing from coloured plant wastes released from the food and beverage industry

Abstract

The food and beverage industry releases considerable amounts of wastes which contain natural dyes. Such wastes could serve as a sources for the extraction of natural dyes for textile-dyeing operations. The extraction of brilliant yellow and red colours from fruits and vegetables is of particular interest. Wastes, e.g. pressed berries, pressed grapes, distillation residues from strong liquor production, and wastes and peels from vegetable processing, have been extracted with boiling water and test dyeings on wool yarn were performed. Colour strength, shade and fastness properties of the dyeings have been tested. The extracts were applied as direct dyes and in the presence of iron(II) or alum mordants. The results prove the potential of such wastes as a source for natural dyestuff extraction. To obtain textile dyeings with acceptable fastness properties, however, rigorous selection of dyes and development of suited processes is required. A considerable number of red natural dyes need further research to optimise the low level of fastness to light.

Extraction of Indigo from Some Isatis species and Dyeing Standardization Using Low-technology Methods

“…corymbosa. The light fastness grade 2 or 3 was required as the lowest limit for positive selection; however, values of light fastness could be increased by further investigations to exceed the limit of grade 2-3 (Bechtold et al 2006). Our results showed that light fastness grade were 3 and 3/4 for I. tinctoria and 3 for I. candolleana while 2/3 for I. tinctoria subsp.…”

“…Poor or insufficient washing fastness could be identified as a limitation for the use of natural dyes extracted from the different representative sources. Sufficient dyestuff fixation also can be seen as a good mark for washing fastness bleeding (Bechtold et al 2006). The dry rubbing fastness ranged in 3/4 to 4 for I. tinctoria and I. candolleana; 4/5 for I. tinctoria subsp.…”

Amerikan Sarmaşığı (Parthenocissus Quinquefolia L.) Bitkisinin Yünü Boyama Özelliklerinin Araştırılması

“…Ancak sentetik boyarmaddelerin elde edilmesiyle birlikte önemini çok büyük oranda kaybetmiştir [6]. Gelecek ile ilgili yeni stratejiler, sürdürülebilir prosesler ve çevre duyarlılığı gibi nedenler doğal boyarmaddelerin yeniden gündeme gelmesine önemli ölçüde neden olmuştur [7]. Günümüzde doğal boyarmaddeler de bu açıdan toplumun ve bilim insanlarının ilgisini önemli ölçüde çekmektedir.…”

Bitkisel Atıklar Kullanılarak Yün, Pamuk ve Rejenere Soya Lifleri için Ekolojik Boyama

“…Söz konusu çalışmalarda vurgulanan ana fikir, bitkisel atıkların önemli miktarda doğal boya içerdiği, bu tür atıkların tekstil boyamacılığında kullanılacak boyarmaddeler için kaynak olarak kullanılabileceğidir [8][9][10][11][12][13]. Bechtold vd.…”

“…Boyama işleminde elde edilen boyarmadde çözeltileri-nin yün, pamuk, keten, poliamid 6,6 liflerine bağlanma performansları incelenmiştir. Farklı boyama sıcaklıkları ve mordanlama metod ve mordan miktarları kullanılarak boyama prosedürünün optimizasyonu hedeflenmiştir [8][9][10][11][12][13].…”