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Tadesse Abate, MollaORCID iD iconorcid.org/0000-0002-5301-740x
Publications (10 of 11) Show all publications
Tadesse Abate, M., Ferri, A., Guan, J., Chen, G. & Nierstrasz, V. (2019). Colouration and bio-activation of polyester fabric with curcumin in supercritical CO2: Part I - Investigating colouration properties. The Journal of Supercritical Fluids
Open this publication in new window or tab >>Colouration and bio-activation of polyester fabric with curcumin in supercritical CO2: Part I - Investigating colouration properties
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2019 (English)In: The Journal of Supercritical Fluids, ISSN 0896-8446Article in journal (Refereed) Published
Place, publisher, year, edition, pages
Elsevier, 2019
Keywords
Supercritical carbon dioxide (scCO2); Curcumin; Polyester; Colour levelness; Colour strength
National Category
Textile, Rubber and Polymeric Materials
Identifiers
urn:nbn:se:hb:diva-21082 (URN)10.1016/j.supflu.2019.104548 (DOI)
Available from: 2019-05-27 Created: 2019-05-27 Last updated: 2019-06-17Bibliographically approved
Tadesse Abate, M., Seipel, S., Viková, M., Vik, M., Ferri, A., Jinping, G., . . . Nierstrasz, V. (2019). Comparison of the photochromic behaviour of dyes in solution and on polyester fabric applied by supercritical carbon dioxide. In: : . Paper presented at Aegean International Textile and Advanced Engineering Conference AΙTAE 2018, Lasvos, Greece, September 5-7, 2018 (pp. 1-8). United Kingdom, 459, Article ID 012026.
Open this publication in new window or tab >>Comparison of the photochromic behaviour of dyes in solution and on polyester fabric applied by supercritical carbon dioxide
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2019 (English)Conference paper, Published paper (Other academic)
Abstract [en]

Photochromic textiles are of considerable interest for smart and functional textile applications due to their remarkable dynamic colour changing effect when irradiated with light of a certain wavelength. The use of resource efficient processes, such as digital inkjet printing and supercritical carbon dioxide (scCO2) dyeing techniques enables an economic production of those high-end functional products with high material costs. In this study, photochromic polyester fabric has been prepared by applying two commercially important photochromic dyes from spirooxazine (SO) and naphthopyran (NP) dye classes using scCO2-dyeing technique. The properties of scCO2 dyed photochromic fabrics were compared with the properties of the same dyes in a non-polar solvent, hexane. UV-Vis spectroscopy and a specially designed online colour measurement system capable of simultaneous UV irradiation and colour measurement were used to evaluate the photochromic colour behaviour. Both photochromic dye types embedded in textile as well as in solution showed significant reversible colour changing properties when exposed to UV light and revert to their original non-coloured form when the UV light is removed. The scCO2 dyed polyester fabrics exhibited similar trends of colour build-up as in solution, while contrasting behaviour was observed in terms of colour changing rates compared to their behaviour in solution.

Place, publisher, year, edition, pages
United Kingdom: , 2019
Keywords
Supercritical CO2 (scCO2), dyeing, Polyester, Photochromic, Spirooxazine, Naphthopyran
National Category
Textile, Rubber and Polymeric Materials
Research subject
Textiles and Fashion (General)
Identifiers
urn:nbn:se:hb:diva-15312 (URN)10.1088/1757-899X/459/1/012026 (DOI)
Conference
Aegean International Textile and Advanced Engineering Conference AΙTAE 2018, Lasvos, Greece, September 5-7, 2018
Projects
SMDTex
Available from: 2018-11-14 Created: 2018-11-14 Last updated: 2019-01-09Bibliographically approved
Tadesse Abate, M. & Nierstrasz, V. (2019). Impregnation of Materials in Supercritical CO2 to Impart Various Functionalities. In: Prof. Igor Leonardovich Pioro (Ed.), Advanced Supercritical Fluids Technologies [Working Title]: . UNITED KINGDOM: InTech
Open this publication in new window or tab >>Impregnation of Materials in Supercritical CO2 to Impart Various Functionalities
2019 (English)In: Advanced Supercritical Fluids Technologies [Working Title] / [ed] Prof. Igor Leonardovich Pioro, UNITED KINGDOM: InTech, 2019Chapter in book (Other academic)
Place, publisher, year, edition, pages
UNITED KINGDOM: InTech, 2019
Keywords
supercritical CO2, impregnation, functionalization, dyeing
National Category
Textile, Rubber and Polymeric Materials
Research subject
Textiles and Fashion (General)
Identifiers
urn:nbn:se:hb:diva-21742 (URN)10.5772/intechopen.89223 (DOI)978-1-83880-709-2 (ISBN)
Available from: 2019-09-18 Created: 2019-09-18 Last updated: 2019-09-18
Tadesse Abate, M., Ferri, A., Guan, J., Chen, G., Ferreira, J. & Nierstrasz, V. (2019). Single-step disperse dyeing and antimicrobial functionalization of polyester fabric with chitosan and derivative in supercritical carbon dioxide. Journal of Supercritical Fluids, 147, 231-240
Open this publication in new window or tab >>Single-step disperse dyeing and antimicrobial functionalization of polyester fabric with chitosan and derivative in supercritical carbon dioxide
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2019 (English)In: Journal of Supercritical Fluids, ISSN 0896-8446, E-ISSN 1872-8162, Vol. 147, p. 231-240Article in journal (Refereed) Published
Abstract [en]

In this study, a novel green approach was adopted to develop antimicrobial polyester fabric using sustainable biopolymers (chitosan/derivative) as eco-friendly antimicrobial agents via the resource efficient supercritical CO2 (scCO2) dyeing route in a single step. Polyester fabric was dyed with a small amount of dye (0.4% owf) in the presence of chitosan/derivative (3% owf) in scCO2 at 120 °C, 25 MPa for 1 h. The success of chitosan/derivative impregnation was confirmed by Fourier Transform Infrared (FTIR), Zeta Potential (ζ), Scanning Electron Microscopy (SEM), and Water Contact Angle (WCA) measurements. According to the result, excellent color strength and fastness properties were obtained and the treated samples also reduced 75 − 93% of Escherichia coli (ATCC 25922) bacteria within one hour. This suggests that the dye and chitosan/derivative had no adverse effect on each other, proving compatibility. This new approach would help to reduce the cost of production and environmental pollution associated with the conventional textile finishing processes.

Keywords
Antimicrobial agents, Biopolymers, Carbon dioxide, Chitosan, Color fastness, Contact angle, Dyeing, Escherichia coli, Fourier transform infrared spectroscopy, Scanning electron microscopy; Textile finishing, Antimicrobial functionalization; Cost of productions; Environmental pollutions; Fastness properties; Fourier transform infrared; Supercritical carbon dioxides; Supercritical CO2 (scCO2); Water contact angle (WCA), Supercritical fluid extraction
National Category
Textile, Rubber and Polymeric Materials
Identifiers
urn:nbn:se:hb:diva-15882 (URN)10.1016/j.supflu.2018.11.002 (DOI)000462690700026 ()2-s2.0-85056637783 (Scopus ID)
Available from: 2019-03-19 Created: 2019-03-19 Last updated: 2019-04-11Bibliographically approved
Malm, V., Tadesse Abate, M., Seipel, S. & Nierstrasz, V. (2019). Supercritical Carbon Dioxide: A Sustainable Medium For Textile Dyeing And Finishing To Expand The Possibilities For A Resource Efficient Production Technology. In: Autex 19th World Textile Conference: Textiles at the Crossroads, 2019: . Paper presented at Autex 2019 World Textile Conference, Ghent, June 11-15, 2019.
Open this publication in new window or tab >>Supercritical Carbon Dioxide: A Sustainable Medium For Textile Dyeing And Finishing To Expand The Possibilities For A Resource Efficient Production Technology
2019 (English)In: Autex 19th World Textile Conference: Textiles at the Crossroads, 2019, 2019Conference paper, Oral presentation with published abstract (Other academic)
Abstract [en]

In our research group focusing on resource efficient processes, we explore the waterless supercritical carbon dioxide (SC-CO2) technology as a promising sustainable alternative to the traditional textile wet dyeing and water based finishing processes. Already, it is industrially implemented for textile dyeing, in particular for synthetic fabrics, and, being a dry color process it is regarded as only using ¼ of the physical footprint compared to conventional dyeing. This, does not only account for water and energy savings, but also includes advantages such as reduced emissions of harmful effluents, less amount of used dye, no or minimal use of auxiliaries (dispersing agents, carriers and surfactants) and low waste of material. To expand the industrial capabilities of this technology and open up for new business opportunities, our research focuses on textile functionalization in SC-CO2, either by only applying a functional material or to combine dyeing and functionalization of fabric in a single-step process. For polyethylene terephthalate (PET) fabric dyeing (step 1) and functionalization (step 2) in a sequential process where similar processing parameters (high temperature and pressure) was used, it was found that the color was extracted in the second step. The PET dyeing kinetics using SC-CO2 as a solvent depend on the transition in the amorphous regions of the fiber and diffusion properties and solvating power of the SC-CO2 with the dye. Hence, extensive studies on compatibility between fiber, dye and functional compounds include solubility of dye and functional material in SC-CO2, optimization of process parameters (pressure and temperature) and depressurization. This is crucial for understanding the adhesion mechanism between fiber and chemicals, and, particularly for a proper adhesion with a durable functional performance. Furthermore, as SC-CO2 is a good solvent for hydrophobic compounds, nonionics and organic compounds with low molecules weight, there are challenges in modifying conventional compound or using co-solvents. Activities within this domain in our research group stretch between dyeing and functionalization of textiles with end-use properties such as antimicrobial, photochromic, moisture management, water repellency, soil repellency and flame retardant.

Keywords
Supercritical carbon dioxide, dye, functionalisation, textile
National Category
Engineering and Technology
Research subject
Textiles and Fashion (General)
Identifiers
urn:nbn:se:hb:diva-21591 (URN)
Conference
Autex 2019 World Textile Conference, Ghent, June 11-15, 2019
Available from: 2019-08-12 Created: 2019-08-12 Last updated: 2019-08-22Bibliographically approved
Tadesse Abate, M. & Nierstrasz, V. (2018). Supercritical CO2 technology for simultaneous dyeing and antimicrobial functionalization of PET fabrics. In: : . Paper presented at 18th AUTEX World Textile Conference, Istanbul, June 20-22, 2018.
Open this publication in new window or tab >>Supercritical CO2 technology for simultaneous dyeing and antimicrobial functionalization of PET fabrics
2018 (English)Conference paper, Oral presentation only (Other academic)
National Category
Textile, Rubber and Polymeric Materials
Identifiers
urn:nbn:se:hb:diva-14392 (URN)
Conference
18th AUTEX World Textile Conference, Istanbul, June 20-22, 2018
Available from: 2018-06-28 Created: 2018-06-28 Last updated: 2018-07-10Bibliographically approved
Tadesse Abate, M. & Nierstrasz, V. (2017). Combined Pre-treatment and Causticization of cotton fabric for improved dye uptake. Advance Research in Textile Engineering, 2(1), Article ID 1016.
Open this publication in new window or tab >>Combined Pre-treatment and Causticization of cotton fabric for improved dye uptake
2017 (English)In: Advance Research in Textile Engineering, ISSN 2572-9373, Vol. 2, no 1, article id 1016Article in journal (Refereed) Published
Abstract [en]

Conventionally, cotton fabric is subjected to a series of separate pretreatment processes such as desizing, scouring, and bleaching to remove natural and added impurities for satisfactory dyeing and finishing. When the sole purpose is to improve the dye uptake, cotton fabric is subjected to yet another separate process called causticization, a treatment of cotton fabric at reduced concentration of caustic soda (110-150 g/L) compared to mercerization. All these processes i.e. desizing, scouring, and bleaching are lengthy and require large amount of water, energy, chemicals, and time which lead to increase in cost and productivity loss.

In this paper, a combined desizing, scouring, bleaching and causticization process with shorter processing time is reported. Single factor randomized experimental design was used for process optimization. Based on experiments, the optimum recipe consisted of padding the gray cotton fabric using a twodip, two-nip technique in a bath containing NaOH 140g/L; Sodium Per Borate (SPB) 40-45g/L; wetting agent 1g/L, batching for 30 min at room temperature and washing the treated fabric with 1g/L emulsifier twice for 15 minutes each at boil with 3% owf SPB added during the second wash, rinsed with hot and cold water and air dried.

The results showed excellent wettability, good degree of whiteness, minimum loss of tensile strength and higher dye uptake compared to uncausticized commercially bleached cotton fabric.

Place, publisher, year, edition, pages
USA: Austin Publishing Group, 2017
Keywords
Causticization, Sodium perborate, Dye uptake, Cold-pad-batch, Whiteness index
National Category
Textile, Rubber and Polymeric Materials
Research subject
Textiles and Fashion (General)
Identifiers
urn:nbn:se:hb:diva-12496 (URN)
Available from: 2017-08-25 Created: 2017-08-25 Last updated: 2017-10-24Bibliographically approved
Tadesse Abate, M. & Nierstrasz, V. (2017). Combined Pre-treatment and Causticization of cotton fabric for improved dye uptake. Advance Research in Textile Engineering, 2(1), Article ID 1016.
Open this publication in new window or tab >>Combined Pre-treatment and Causticization of cotton fabric for improved dye uptake
2017 (English)In: Advance Research in Textile Engineering, ISSN 2572-9373, Vol. 2, no 1, article id 1016Article in journal (Refereed) Published
Abstract [en]

Conventionally, cotton fabric is subjected to a series of separate pretreatment processes such as desizing, scouring, and bleaching to remove natural and added impurities for satisfactory dyeing and finishing. When the sole purpose is to improve the dye uptake, cotton fabric is subjected to yet another separate process called causticization, a treatment of cotton fabric at reduced concentration of caustic soda (110-150 g/L) compared to mercerization. All these processes i.e. desizing, scouring, and bleaching are lengthy and require large amount of water, energy, chemicals, and time which lead to increase in cost and productivity loss.

In this paper, a combined desizing, scouring, bleaching and causticization process with shorter processing time is reported. Single factor randomized experimental design was used for process optimization. Based on experiments, the optimum recipe consisted of padding the gray cotton fabric using a twodip, two-nip technique in a bath containing NaOH 140g/L; Sodium Per Borate (SPB) 40-45g/L; wetting agent 1g/L, batching for 30 min at room temperature and washing the treated fabric with 1g/L emulsifier twice for 15 minutes each at boil with 3% owf SPB added during the second wash, rinsed with hot and cold water and air dried.

The results showed excellent wettability, good degree of whiteness, minimum loss of tensile strength and higher dye uptake compared to uncausticized commercially bleached cotton fabric.

Place, publisher, year, edition, pages
USA: Austin Publishing Group, 2017
Keywords
Causticization, Sodium perborate, Dye uptake, Cold-pad-batch, Whiteness index
National Category
Textile, Rubber and Polymeric Materials
Research subject
Textiles and Fashion (General)
Identifiers
urn:nbn:se:hb:diva-15684 (URN)10.26420/advrestexteng.2017.1016 (DOI)
Available from: 2019-01-15 Created: 2019-01-15 Last updated: 2019-01-16Bibliographically approved
Tadesse Abate, M. & Nierstrasz, V. (2017). Eco-friendly antimicrobial functionalization and dyeing of PET fabrics using supercritical carbon dioxide. In: : . Paper presented at The 6th edition of the International Conference on Intelligent Textiles and Mass Customisation (ITMC 2017), Gent Belgium, October 15-18, 2017.
Open this publication in new window or tab >>Eco-friendly antimicrobial functionalization and dyeing of PET fabrics using supercritical carbon dioxide
2017 (English)Conference paper, Poster (with or without abstract) (Other academic)
Keywords
Antimicrobial textile, Supercritical CO2, Chitosan, Dyeing
National Category
Textile, Rubber and Polymeric Materials
Research subject
Textiles and Fashion (General)
Identifiers
urn:nbn:se:hb:diva-12879 (URN)
Conference
The 6th edition of the International Conference on Intelligent Textiles and Mass Customisation (ITMC 2017), Gent Belgium, October 15-18, 2017
Available from: 2017-10-19 Created: 2017-10-19 Last updated: 2017-12-13Bibliographically approved
Tadesse Abate, M. & Nierstrasz, V. (2017). Supercritical CO2 technology in resource effective textile production of functional textiles. In: : . Paper presented at 17th World Textile Conference AUTEX 2017, Corfu Greece, May 29–31, 2017.
Open this publication in new window or tab >>Supercritical CO2 technology in resource effective textile production of functional textiles
2017 (English)Conference paper, Poster (with or without abstract) (Other academic)
Abstract [en]

Supercritical CO2 (SC-CO2) textile processing is a water-free technology with significant savings in energy, chemicals, and wastewater while producing high-quality products thereby creating new business opportunities. It is an attractive alternative to both water and organic solvent since it is inexpensive, essentially nontoxic, nonflammable, environmentally friendly and requires relatively low critical temperature 310c and pressure 7.38 Mpa which can easily be recaptured and recycled after use.

Today supercritical CO2 dyeing of PET has come up to the commercial level. The Netherlands-based company, DyeCoo Textile Systems, was the first to launch commercial SC-CO2 dyeing system. Meanwhile, SC-CO2 is a resource efficient, flexible, and ecological textile production which could be a suitable technology for textile functionalization. However, there are limited studies on the potential use of this technology for the production of smart and functional textiles. Furthermore, unlike dyes, fundamental understanding of the solubility and transport (kinetics) properties of functional compounds is lacking.

The aim of this research project is to develop sustainable functional and smart textile materials using SC-CO2 technology. It will focus on combined dyeing and functionalization (antimicrobial, medical/care, and flame retardant) of woven and knitted synthetic textiles using SC-CO2. Preliminary experiments have been conducted to develop antimicrobial polyester fabric in SC-CO2 and a promising result is found. Furthermore, characterization of the functionalized fabric (surface property, wettability), the release kinetics of active principles from textiles (Franz cell device, HPLC) and the skin physiology after the contact with a functionalized fabric (cutometer) will be investigated. 

Keywords
Sustainable development, Supercritical CO2, functionalization, dyeing
National Category
Textile, Rubber and Polymeric Materials
Research subject
Textiles and Fashion (Design)
Identifiers
urn:nbn:se:hb:diva-12213 (URN)
Conference
17th World Textile Conference AUTEX 2017, Corfu Greece, May 29–31, 2017
Available from: 2017-06-09 Created: 2017-06-09 Last updated: 2017-12-15Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-5301-740x

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