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ABDULLAHI SS, MUSA H, HABIBU S, BIRNIWA AH, MOHAMMAD REA. Comparative study and dyeing performance of as-synthesized azo heterocyclic monomeric, polymeric, and commercial disperse dyes. Turk J Chem 2022; 46:1841-1852. [PMID: 37621345 PMCID: PMC10446942 DOI: 10.55730/1300-0527.3484] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Revised: 12/19/2022] [Accepted: 07/03/2022] [Indexed: 12/24/2022] Open
Abstract
In this study poly (4-nitrophenylazo-3-aminopyridine - formaldehyde) (PNAAP-F) and poly (4-nitroarylazo-3-chloro-6-hydroxypyridine - formaldehyde) (NAACHP-F) were synthesized via diazotization, coupling and polycondensation reactions. The structural properties of the as-synthesized dyes were acquired using Fourier-transform infrared spectroscopy (FTIR) and UV-visible absorption maxima and their color, yield, melting point, solubility, and viscosity were determined via standard methods. UV-visible and FTIR results show successful formation of the polymeric dyes due to shift of wavelength of maximum absorption (λmax) (440-490 nm, 480-540 nm) and new absorption peak at around (2780-2995 cm-1) for methylene bridge respectively. The dyes were found to be of good yield (monomeric: 73.3%-87.2 %, polymeric: 53.8%-76.6 %), low melting point (monomeric: 112.6-121.2, and 136.0-137.0 °C, while polymeric: 134.0-144.5, and 149.4-154.7 °C), soluble in some solvents. The dyeing activity was carried out and assessed on nylon and polyester fabrics using the standard methods. The dyeing process was carried out via high temperature and carrier dyeing methods. The dyeing properties of the synthesized dyes were compared with those of commercial disperse dyes (terasil brilliant violet and terasil scarlet, brown). The dyeings of nylon and polyester had a very attractive hue and the color ranges from yellow and deep yellow shades with very good to excellent fastness to light, washing, hot pressing, and rubbing.
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Affiliation(s)
- Shehu Sa’ad ABDULLAHI
- Department of Polymer Technology, Hussaini Adamu Federal Polytechnic, Kazaure, Jigawa,
Nigeria
- School of Chemical Sciences, Universiti Sains Malaysia, Penang,
Malaysia
| | - Haruna MUSA
- Department of Pure and Industrial Chemistry, Bayero University, Kano,
Nigeria
| | - Shehu HABIBU
- Department of Chemistry, Federal University Dutse, Jigawa,
Nigeria
| | | | - Rania Edrees Adam MOHAMMAD
- School of Chemical Sciences, Universiti Sains Malaysia, Penang,
Malaysia
- Department of Sciences, Faculty of Education, Open University of Sudan, Khartoum,
Sudan
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Li Y, Noro J, Martins M, Jing S, Silva C, Cavaco-Paulo A. Changing the shape of wool yarns via laccase-mediated grafting of tyrosine. J Biotechnol 2021; 339:73-80. [PMID: 34364924 DOI: 10.1016/j.jbiotec.2021.08.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 07/08/2021] [Accepted: 08/03/2021] [Indexed: 10/20/2022]
Abstract
The shape of wool yarns was changed by laccase-assisted grafting of tyrosine. Prior to tyrosine grafting a cysteine pre-treatment was optimized aiming to increase the amount of thiol reaction groups available. The best operational conditions for laccase-assisted tyrosine grafting were: i) pre-treatment with cysteine (2.2 mM) in a solution of 20 % ethanol, 15 % propylene glycol and 0.5 % benzyl alcohol, pH = 10, 40 °C; ii) tyrosine grafting with 3.0 mM tyrosine, 18 U/mL laccase, pH = 5, 40 °C. The shape modification was evaluated by number of curly twists determination on the grafted yarn samples. The thermal and mechanical properties of the grafted wool yarns was evaluated by TGA, DSC and breaking strength determination. The amount of free thiols and weight gain were assessed aiming to infer the role of the cysteine pre-treatment on the final tyrosine grafting and shape modification. The laccase-assisted grafting of tyrosine onto wool yarns have influenced the thermal and mechanical properties of the yarns however without compromising their structural integrity for the final application purposes. The developed methodology to impart new shape to wool yarns is presented herein as an environmentally friendly alternative to chemical methods. The new findings revealed great potentialities for application in similar fibers like hair.
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Affiliation(s)
- Yu Li
- Jiangsu Engineering Technology Research Centre of Functional Textiles, Jiangnan University, 214122, Wuxi, China; Key Laboratory of Eco-textiles, Jiangnan University, Ministry of Education, China; International Joint Research Laboratory for Textile and Fiber Bioprocesses, Jiangnan University, 214122, Wuxi, China
| | - Jennifer Noro
- Center of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal
| | - Madalena Martins
- Center of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal
| | - Su Jing
- Jiangsu Engineering Technology Research Centre of Functional Textiles, Jiangnan University, 214122, Wuxi, China; Key Laboratory of Eco-textiles, Jiangnan University, Ministry of Education, China; International Joint Research Laboratory for Textile and Fiber Bioprocesses, Jiangnan University, 214122, Wuxi, China
| | - Carla Silva
- Center of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal.
| | - Artur Cavaco-Paulo
- Jiangsu Engineering Technology Research Centre of Functional Textiles, Jiangnan University, 214122, Wuxi, China; Key Laboratory of Eco-textiles, Jiangnan University, Ministry of Education, China; International Joint Research Laboratory for Textile and Fiber Bioprocesses, Jiangnan University, 214122, Wuxi, China; Center of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal.
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Kalkan Erdoğan M, Aydoğdu Tığ G, Saçak M. A novel tool for the adsorption of dsDNA: Electrochemical reduction of Pd nanoparticles onto reduced-keratin particles extracted from wool wastes. Bioelectrochemistry 2021; 140:107835. [PMID: 33984693 DOI: 10.1016/j.bioelechem.2021.107835] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Revised: 04/25/2021] [Accepted: 04/29/2021] [Indexed: 10/21/2022]
Abstract
This work outlines the fabrication of a novel electrochemical platform for the dsDNA adsorption, using one of the most sustainable materials, wool fabric waste, and Pd2+ ions. To develop a functional material with a significant adsorption capability, the waste wool was subjected to the chemical reduction process, and the keratin-SH (KerSH) particles were extracted in powder form. These particles were used in the adsorption of Pd2+ ions by monitoring with the UV-vis spectra. The dispersion of the KerSH-Pd2+ particles was subsequently drop-casted onto a glassy carbon electrode (GCE) and electrochemically reduced to the GCE/KerSH-PdNPs composite by chronoamperometry at -0.4 V for 500 s. It was found that the KerSH particles were self-assembled by revealing chemically attractive NH2 groups after the electrochemical PdNPs deposition. A GCE/KerSH-PdNPs composite was then employed in the electrochemical dsDNA detection by Differential Pulse Voltammetry (DPV), using the oxidation signals of guanine and adenine bases at 0.8 V and 1.2 V, respectively. Accordingly, relatively stable, repeatable, and reproducible dsDNA adsorption was ensured through the positively charged-NH2 groups of KerSH-PdNPs. This finding reveals the potential of textile waste for various electrochemical applications, such as DNA biosensors for environmental, pharmaceutical, and medicinal fields.
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Affiliation(s)
| | - Gözde Aydoğdu Tığ
- Ankara University, Faculty of Science, Department of Chemistry, Ankara, Turkey.
| | - Mehmet Saçak
- Ankara University, Faculty of Science, Department of Chemistry, Ankara, Turkey.
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