Use of ultrasonic energy for enhancing the dyeing performances of polyamide fibers with olive vegetable water

Abstract

The present study reports the valorization of the olive vegetable water in natural dyeing. HPLC analysis of the phenolic extract obtained from the used olive vegetable water showed that the predominant flavonoid compounds were luteolin and apigenin. Hydroxytyrosol and various phenolic acids were also identified. This abundant waste was used as a possible dye bath for dyeing polyamide fabrics in conventional and ultrasonic techniques. It was found that these synthetic fibers possess high affinity to the olive vegetable water giving brownish shades with generally good fastness properties. Factors affecting the dyeing performances such as pH, temperature, and duration of the dyeing time were studied. Ultrasonic dyeing showed marked improvement in the dye uptake compared to the conventional heating. The results also showed that the use of this method enhanced some fastness properties compared to the conventional method. Moreover, it was found that using ultrasonic technique can reduce the concentration of polyphenols so that it reduced the chemical oxygen demand COD and biological oxygen demand BOD 5 better than conventional heating method.

Effect of alcoholic phenol and nanocapsules extract from grape seed (Vitis vinifera) on egg hatching and adult death of southern cowpea beetles

“…Grape seeds were collected from the local markets in Baghdad, then washed and left to dry with stirring from time to time to prevent rotting, then finely ground to be used for phenol extraction. Phenols were prepared according to the method described in [10]. 50 g of seed powder was taken, then 500 ml of petroleum ether solvent was added to it at a ratio of 10:1 (solvent: plant) and placed in a Soxhlet device at a temperature of 60 °C for a period of 4-6 hours.…”

Clean printing process of cotton with natural dyes: Effect of paste formulation components on printing performances

“…The use of natural dyes on dyeing process was defined to be very promising. Many successful applications of bio-sourced pigments and dyes were proposed in dyeing field [26][27][28][29][30][31][32]. Several industrial applications were also noted.…”

The use of D-optimal design in optimization of wool dyeing with Juglansregia bark

“…Several studies have been reported on application of different natural dyes on textile fibers. Barberry tree root, cumin seeds, grape leaves and pomace, red cabbage, milkweed leave, Achilleapachycephala flowers, almond shell, pomegranate rinds and wastewater of olive oil production are examples of new sources of natural dyes which have been studied in recent years [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. Despite several advantages associated with the use of natural dyes in dyeing textile goods, there is a great need for optimization of natural dyeing processes to fulfill the equipments of today's industry.…”