Change search
Link to record
Permanent link

Direct link
Publications (10 of 14) Show all publications
Lindström, K., van der Holst, F., Berglin, L., Persson, A. & Kadi, N. (2023). Investigation Of Abrasive Pre-Treatment To Mitigate Length Loss During Mechanical Textile Recycling. In: : . Paper presented at AUTEX 2023 Conference, Melbourne, Australia, 26-28 June, 2023..
Open this publication in new window or tab >>Investigation Of Abrasive Pre-Treatment To Mitigate Length Loss During Mechanical Textile Recycling
Show others...
2023 (English)Conference paper, Oral presentation with published abstract (Refereed)
Abstract [en]

The environmental burden of the textile industry can be decreased with an increased use of mechanically recycled fibers. However, it is well known that the recycling process is harsh and shortens the fibers substantially. Still, little has been investigated about the influencing factors of the fiber length loss. 

Previous research has shown that the parts of a garment that is more worn, lose less fiber length in the mechanical recycling process.1 One explanation could be that a loss of fibers during wearing create a more open structure of the textile. By removing fibers from the yarns in a textile, the yarn structure is partly broken down, and the yarn linear density is decreased. The strength of spun staple fiber yarns is dependent on the friction and contact surfaces between fibers. In addition, fiber migration, the variation of radial position of a fiber in the yarn, causes the fibers to lock between different helical layers and thus creates a self-locking mechanism giving strength to the yarn.2 Removal of any fiber in such a yarn affect all fibers in contact with that fiber. This in turn makes both the textile and yarns weaker and consequently more easily disentangles in a mechanical recycling process – keeping more of the fiber length. 

The work at hand investigated this theory by subjecting woven cotton textiles with abrasion treatment prior to mechanical recycling. We compared two different methods of abrasion with unabraded textile. The two pre-treatment abrasion methods used were rubbing with sandpaper and raising with steel pins. By measuring the fiber length post mechanical recycling, we could estimate the efficiency of the recycling process in respect to preservation of the fiber. 

Results showed that only the raising process had a positive impact in mitigating fiber length loss through the recycling process. During the rubbing with sandpaper, the fabric was pressed and thus became denser. On the contrary, the raising process pulled out the fibers and created a fuzzy surface. As the removal of any fiber affect all fibers in direct contact, even fibers in the center of the yarn are affected when surface fibers are pulled out or weakened. The raising process extracted fibers which opened up the fabric and affected the yarn structure. Hence, the yarns were more easily disentangled in the recycling process. The result gives great insight into the mechanisms of mechanical recycling and can be used for future development of the same. 

Keywords
Mechanical textile recycling, abrasion pre-treatment, fiber length loss, recycling efficiency
National Category
Textile, Rubber and Polymeric Materials
Research subject
Textiles and Fashion (General)
Identifiers
urn:nbn:se:hb:diva-30392 (URN)
Conference
AUTEX 2023 Conference, Melbourne, Australia, 26-28 June, 2023.
Available from: 2023-08-31 Created: 2023-08-31 Last updated: 2023-08-31Bibliographically approved
Pita Miguélez, I., Persson, A., Blomberg, P. & Kadi, N. (2022). Study of spinnability impediments for cottonrecycled fibres due to morphological alterations during simulated production. In: : . Paper presented at Aachen Dresden Denkendorf: International Textile Conference. Aachen, 1-2 December 2022..
Open this publication in new window or tab >>Study of spinnability impediments for cottonrecycled fibres due to morphological alterations during simulated production
2022 (English)Conference paper, Poster (with or without abstract) (Other academic)
Keywords
cotton, recycling, spinning, knitted fabric, manufacturing
National Category
Textile, Rubber and Polymeric Materials
Research subject
Textiles and Fashion (General)
Identifiers
urn:nbn:se:hb:diva-31696 (URN)
Conference
Aachen Dresden Denkendorf: International Textile Conference. Aachen, 1-2 December 2022.
Note

Funding: Vinnova, Collaboration between Swedish School of Textiles, AUTEX and University of Ghent

Available from: 2024-03-18 Created: 2024-03-18 Last updated: 2024-03-19
Lindström, K., Sjöblom, T., Persson, A. & Kadi, N. (2020). Improving Mechanical Textile Recycling by Lubricant Pre-Treatment to Mitigate Length Loss of Fibers. Sustainability, 12(20)
Open this publication in new window or tab >>Improving Mechanical Textile Recycling by Lubricant Pre-Treatment to Mitigate Length Loss of Fibers
2020 (English)In: Sustainability, E-ISSN 2071-1050, Vol. 12, no 20Article in journal (Refereed) Published
Abstract [en]

Although there has been some research on how to use short fibers from mechanically recycled textiles, little is known about how to preserve the length of recycled fibers, and thus maintain their properties. The aim of this study is to investigate whether a pre-treatment with lubricant could mitigate fiber length reduction from tearing. This could facilitate the spinning of a 100% recycled yarn. Additionally, this study set out to develop a new test method to assess the effect of lubricant loading. Inter-fiber cohesion was measured in a tensile tester on carded fiber webs. We used polyethylene glycol (PEG) 4000 aqueous solution as a lubricant to treat fibers and woven fabrics of cotton, polyester (PES), and cotton/polyester. Measurements of fiber length and percentage of unopened material showed the harshness and efficiency of the tearing process. Treatment with PEG 4000 decreased inter-fiber cohesion, reduced fiber length loss, and facilitated a more efficient tearing process, especially for PES. The study showed that treating fabric with PEG enabled rotor spinning of 100% recycled fibers. The inter-fiber cohesion test method suggested appropriate lubricant loadings, which were shown to mitigate tearing harshness and facilitate fabric disintegration in recycling.

Place, publisher, year, edition, pages
Basel: MDPI, 2020
Keywords
textile recycling, yarn spinning, inter-fiber cohesion, lubricant, mechanical tearing
National Category
Textile, Rubber and Polymeric Materials
Research subject
Textiles and Fashion (General)
Identifiers
urn:nbn:se:hb:diva-24384 (URN)10.3390/su12208706 (DOI)000583088400001 ()2-s2.0-85093925329 (Scopus ID)
Funder
Region Västra Götaland
Available from: 2020-12-09 Created: 2020-12-09 Last updated: 2022-02-10Bibliographically approved
Aronsson, J. & Persson, A. (2020). Tearing of post-consumer cotton T-shirts and jeans of varying degree of wear. Journal of Engineered Fibers and Fabrics, 15, 1-9
Open this publication in new window or tab >>Tearing of post-consumer cotton T-shirts and jeans of varying degree of wear
2020 (English)In: Journal of Engineered Fibers and Fabrics, E-ISSN 1558-9250, Vol. 15, p. 1-9Article in journal (Refereed) Published
Abstract [en]

The demand for textile fibres is growing quickly. However, global cotton production has stabilized around 25 Mton/year. This is a sound development since cotton cultivation causes major sustainable development issues. Even if regenerated cellulose fibre production steadily grows, it is still only from a sixth to a fifth of cotton volumes. Hence, it is essential to find resource-efficient routes to generate alternatives to virgin cotton. There are many promising research initiatives that discover the possibility to utilize waste streams of neat cotton and cotton in fibre blends as raw materials for dissolving pulp for regeneration into, for example, viscose or Lyocell. However, there is a much simpler and energy-efficient route at hand. If fabrics are disintegrated mechanically, the separated fibres can be turned into yarn again. However, since fibre length is a key parameter to accomplish strong and durable textiles, fibre length loss upon tearing should be minimized. This study evaluates how fibre length distribution alters upon tearing of post-consumer cotton waste of two different constructions: denim and single jersey; and different degrees of wear, rendering four different fractions: (1) barely worn denim, (2) rather worn denim, (3) barely worn single-jersey and (4) rather worn single-jersey. Before tearing, the garments were dissembled, their yarns were characterized, fibre length distributions were manually determined for (1)–(4). Length analysis of the recovered fibres after tearing revealed that the length drop was most severe for (a) the finer single-jersey and (b) the barely worn fractions. The findings suggest that significant wear does not exclude from mechanical recycling.

Place, publisher, year, edition, pages
Sage Publications, 2020
Keywords
Textile recycling, mechanical recycling, cotton tearing, fibre length distribution, circular economy
National Category
Textile, Rubber and Polymeric Materials
Research subject
Textiles and Fashion (General)
Identifiers
urn:nbn:se:hb:diva-22824 (URN)10.1177/1558925020901322 (DOI)000514910600001 ()2-s2.0-85079711493 (Scopus ID)
Projects
Miljötestbädd för textilåtervinning
Funder
Region Västra Götaland, 145231
Available from: 2020-02-17 Created: 2020-02-17 Last updated: 2023-10-04Bibliographically approved
Lindström, K., Sjöblom, T., Persson, A. & Kadi, N. (2019). Decreasing Inter-Fiber Friction With Lubricants For Efficient Mechanical Recycling Of Textiles. In: Autex 19th World Textile Conference: Textiles at the Crossroads. Paper presented at Autex 2019 World Textile Conference, Ghent, June 11-15, 2019..
Open this publication in new window or tab >>Decreasing Inter-Fiber Friction With Lubricants For Efficient Mechanical Recycling Of Textiles
2019 (English)In: Autex 19th World Textile Conference: Textiles at the Crossroads, 2019Conference paper, Oral presentation with published abstract (Refereed)
Abstract [en]

To decrease the environmental burden of the textile industry and at the same time reduce textile waste, the fibers of discarded textiles can be re-used into new yarns and fabrics. The shortening of fibers during mechanical shredding direct the use of the recovered fibers to low value products. With the use of a lubricant pre-treatment on cotton and polyester fabrics, we decreased the friction during shredding. The reduction in friction was shown with a developed inter-fiber friction test. Further, the pre-treatment was shown to give longer recovered fibers and eliminate melted areas in polyester material.

National Category
Textile, Rubber and Polymeric Materials
Research subject
Textiles and Fashion (General)
Identifiers
urn:nbn:se:hb:diva-21205 (URN)
Conference
Autex 2019 World Textile Conference, Ghent, June 11-15, 2019.
Available from: 2019-06-17 Created: 2019-06-17 Last updated: 2019-06-20Bibliographically approved
Lindström, K., Kadi, N. & Persson, A. (2019). Investigation Of Staple Fibre To Fibre Cohesion By Tensile Test Of Web. In: : . Paper presented at Aachen-Dresden-Denkendorf International Textile Conference, Dresden, November 28-29, 2019..
Open this publication in new window or tab >>Investigation Of Staple Fibre To Fibre Cohesion By Tensile Test Of Web
2019 (English)Conference paper, Poster (with or without abstract) (Other academic)
Abstract [en]

Friction and cohesion forces have great influence on the processability of a fibre as well as causing fibre breakage during mechanical recycling of textiles. Through pre-treatment of the fibres or textiles with a lubricant, the friction and cohesion forces can be decreased. However, the measurement of friction coefficient on staple fibres is challenging and needs special machinery. With the development of a new test method of the fibre cohesion force we can measure the effect of a treatment on fibre cohesion, predict the spinnability of a fibre as well as see the effect of a lubricant on the tearing efficiency in textile mechanical recycling.

Series
Skrifter från Centrum för lärande och undervisning, ISSN 1650-5859Skrifter från Centrum för lärande och undervisning, ISSN 1650-5859
Keywords
Textile recycling, yarn spinning, inter-fiber cohesion, lubricant, mechanical shredding, Textilåtervinning, garnspinning, smörjmedel, mekanisk textilåtervinning
National Category
Textile, Rubber and Polymeric Materials
Identifiers
urn:nbn:se:hb:diva-22823 (URN)
Conference
Aachen-Dresden-Denkendorf International Textile Conference, Dresden, November 28-29, 2019.
Funder
Region Västra Götaland
Available from: 2020-02-17 Created: 2020-02-17 Last updated: 2020-02-26Bibliographically approved
Garrote Jurado, R., Pettersson, T., Baghaei, B. & Persson, A. (2018). Preparing for Masters´ Studies: A Web Based Tool For Self-Assessment and Knowledge Gap Mitigation. In: : . Paper presented at 10th International Conference on Education and New Learning Technologies. Palma, Spain. 2-4 July, 2018.. International Association of Technology, Education and Development (IATED) www.iated.org
Open this publication in new window or tab >>Preparing for Masters´ Studies: A Web Based Tool For Self-Assessment and Knowledge Gap Mitigation
2018 (English)Conference paper, Published paper (Refereed)
Abstract [en]

This paper presents a project, conducted by three European universities and a software company, funded by Erasmus +, Strategic Partnership. The project addresses the problem that sometime masters´ students do not get their degree within the allocated time, if at all. Apparently some students with the formal prerequisites to register for a master's programme still lacked the actual abilities to manage their studies.

The solution was to design an online HTML5 platform to house self-assessment and learning resource modules for four different master's programmes in Europe. The modules were intended to illustrate the level and abilities that potential applicants were supposed to bring into their studies by a self-assessment test. In case lacking abilities were revealed, the modules offer learning resources to mitigate those gaps.

The access modules provides potential students with a visualization of twelve different skills and knowledge as compared to those identified by lecturers as necessary for study on the master's course. If there are weak spots identified, the students are presented with a series of learning interventions designed to remedy their ability flaws.  

The authors suggest that providing potential students with this kind of material can raise their awareness of what the programme really takes. In this way students with false expectations can be avoided and the ones who applies come better prepared, which the use of access modules potentially can leads to improved enrolment, completion rate, time-to-degree and retention in a wide range of academic programmes.

Place, publisher, year, edition, pages
International Association of Technology, Education and Development (IATED) www.iated.org, 2018
Keywords
information and communication technology, e-learning, Open Educational Resources, higher learning institutions, developing countries, Engineering Education
National Category
Pedagogy Other Social Sciences
Research subject
Teacher Education and Education Work
Identifiers
urn:nbn:se:hb:diva-15461 (URN)978-84-09-02709-5 (ISBN)
Conference
10th International Conference on Education and New Learning Technologies. Palma, Spain. 2-4 July, 2018.
Available from: 2018-12-14 Created: 2018-12-14 Last updated: 2019-01-03Bibliographically approved
Lindström, K., Kadi, N. & Persson, A. (2018). Utility of conditioner for reduced interfibre friction as predictor of gentler shredding. In: Aachen-Dresden-Denkendorf International Textile Conference, Aachen, November 29-30 2018: . Paper presented at Aachen-Dresden-Denkendorf International Textile Conference, Aachen, November 29-30, 2018.
Open this publication in new window or tab >>Utility of conditioner for reduced interfibre friction as predictor of gentler shredding
2018 (English)In: Aachen-Dresden-Denkendorf International Textile Conference, Aachen, November 29-30 2018, 2018Conference paper, Poster (with or without abstract) (Other academic)
Keywords
Textile recycling, yarn spinning, inter-fiber friction, lubricant, mechanical shredding, Textilåtervinning, garnspinning, fiberfriktion, smörjmedel, mekanisk textilåtervinning
National Category
Textile, Rubber and Polymeric Materials
Research subject
Textiles and Fashion (General)
Identifiers
urn:nbn:se:hb:diva-15740 (URN)
Conference
Aachen-Dresden-Denkendorf International Textile Conference, Aachen, November 29-30, 2018
Available from: 2019-02-11 Created: 2019-02-11 Last updated: 2019-02-13Bibliographically approved
Persson, A., Björquist, S., Aronsson, J. & Henriksson, G. (2017). Textile qualities of regenerated cellulose fibers from cotton waste pulp. Textile research journal
Open this publication in new window or tab >>Textile qualities of regenerated cellulose fibers from cotton waste pulp
2017 (English)In: Textile research journal, ISSN 0040-5175, E-ISSN 1746-7748Article in journal (Refereed) Published
Abstract [en]

Cotton is not the answer to meet the rapidly growing demand for textile fibers. Wood-based regenerated cellulosefibers are an attractive alternative. Since wood is a candidate to replace fossil raw materials in so many applications of thecircular economy, other sources need investigation. Cotton linters work in the viscose process – can cotton waste beused to make dissolving pulp? We describe the textile qualities of lyocell fibers from (i) pure cotton waste pulp and(ii) blending with conventional dissolving pulp. The staple fibers were tensile tested, yarns spun and tensile tested andknitted, and tested for shrinkage, water and dye sorption, abrasion resistance, fuzzing and pilling, staining and fastness.TENCEL staple fibers and off-the-shelf TENCEL yarn were used as references. The results show that the two studyfibers had tenacity and an E-modulus that exceeded the staple fiber reference. Also, the study yarns were at least as goodas the spun reference yarn and the commercial off-the-shelf yarn in terms of wet tenacity. Single jerseys made from thestudy yarns shrunk less upon laundering, which is surprising since they could absorb at least as much water at acomparable rate as the references. Dyeability, staining and color fastness, durability and pilling tendency showed thatthe two study fiber tricots performed at least as good as the references. This study suggests that cotton waste is apromising candidate for special grade pulp to suit niche regenerated fiber products or to spice up conventional woodbaseddissolving pulp.

Keywords
cotton waste pulp, staple fiber, circular economy, environmental sustainability, spinning, fabrication
National Category
Textile, Rubber and Polymeric Materials
Research subject
Textiles and Fashion (General)
Identifiers
urn:nbn:se:hb:diva-12971 (URN)10.1177/0040517517723021 (DOI)000448270200009 ()2-s2.0-85045077969 (Scopus ID)
Funder
VINNOVA, Dnr2014-05567
Available from: 2017-11-06 Created: 2017-11-06 Last updated: 2018-12-01Bibliographically approved
Persson, A., Tanttu, M., Michud, A., Asaadi, S., Ma, Y., Netti, E., . . . Hummel, M. (2016). Ioncell-F: ionic liquid-based cellulosic textile fibers as an alternative to viscose and Lyocell. Textile research journal, 86(5), 543-552
Open this publication in new window or tab >>Ioncell-F: ionic liquid-based cellulosic textile fibers as an alternative to viscose and Lyocell
Show others...
2016 (English)In: Textile research journal, ISSN 0040-5175, E-ISSN 1746-7748, Vol. 86, no 5, p. 543-552Article in journal (Refereed) Published
Abstract [en]

Ioncell-F, a recently developed process for the production of man-made cellulosic fibers from ionic liquid solutions by dry-jet wet spinning, is presented as an alternative to the viscose and N-methylmorpholine N-oxide (NMMO)-based Lyocell processes. The ionic liquid 1,5-diazabicyclo[4.3.0]non-5-ene acetate was identified as excellent cellulose solvent allowing for a rapid dissolution at moderate temperatures and subsequent shaping into continuous filaments. The highly oriented cellulose fibers obtained upon coagulation in cold water exhibited superior tenacity, exceeding that of commercial viscose and NMMO-based Lyocell (Tencel) fibers. The respective staple fibers, which have been converted into two-ply yarn by ring spinning technology, presented very high tenacity. Furthermore, the Ioncell yarn showed very good behavior during the knitting and weaving processes, reflecting the quality of the produced yarn. The successfully knitted and woven garments from the Ioncell yarn demonstrate the suitability of this particular ionic liquid for the production of man-made cellulosic fibers and thus give a promising outlook for the future of the Ioncell-F process.

Place, publisher, year, edition, pages
Sage Publications, 2016
Keywords
cellulose, ionic liquid, dry-jet wet spinning, Ioncell-F process, fiber-yarn-fabric formation, viscose, N-methylmorpholine Noxide-
National Category
Textile, Rubber and Polymeric Materials
Research subject
Textiles and Fashion (General)
Identifiers
urn:nbn:se:hb:diva-11389 (URN)10.1177/0040517515591774 (DOI)000370047000009 ()2-s2.0-84957086068 (Scopus ID)
Available from: 2016-12-14 Created: 2016-12-14 Last updated: 2017-11-29Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-9935-8306

Search in DiVA

Show all publications