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Dahlström, Christina
Publications (10 of 54) Show all publications
Dahlström, C., Eivazi, A., Nejström, M., Zhang, R., Pettersson, T., Iftikhar, H., . . . Norgren, M. (2024). Regenerated cellulose properties tailored for optimized triboelectric output and the effect of counter-tribolayers. Cellulose, 31(4), 2047-2061
Open this publication in new window or tab >>Regenerated cellulose properties tailored for optimized triboelectric output and the effect of counter-tribolayers
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2024 (English)In: Cellulose, ISSN 0969-0239, E-ISSN 1572-882X, Vol. 31, no 4, p. 2047-2061Article in journal (Refereed) Published
Abstract [en]

Cellulose has shown great potential in the development of green triboelectric nanogenerators. Particularly, regenerated cellulose (R-cellulose) has shown remarkably high output power density but the structural features and key parameters that explain such superior performance remain unexplored. In this work, wood cellulose fibers were dissolved in a LiOH(aq)-based solvent to produce a series of R-cellulose films. Regeneration in different alcohols (from methanol to n-pentanol) was performed and the films’ structural features and triboelectric performance were assessed. Nonsolvents of increased hydrophobicity led to R-cellulose films with a more pronounced (1–10) diffraction peak. An open-circuit voltage (VOC) of up to ca. 260 V and a short-circuit current (ISC) of up to ca. 150 µA were measured for R-cellulose against polytetrafluoroethylene (as negative counter-layer). However, R-cellulose showed an increased VOC of 175% (from 88.1 V) against polydimethylsiloxane when increasing the alcohol hydrocarbon chain length from methanol to n-pentanol. The corresponding ISC and output power also increased by 76% (from 89.9 µA) and by 382% (from 8.8 W m–2), respectively. The higher R-cellulose hydrophilicity, combined with soft counter-tribolayer that follow the surface structures increasing the effective contact area, are the leading reasons for a superior triboelectric performance.

Place, publisher, year, edition, pages
Springer Nature, 2024
National Category
Materials Chemistry Polymer Chemistry
Identifiers
urn:nbn:se:miun:diva-50421 (URN)10.1007/s10570-024-05745-8 (DOI)001154303000002 ()2-s2.0-85184163338 (Scopus ID)
Available from: 2024-02-04 Created: 2024-02-04 Last updated: 2024-03-08Bibliographically approved
Zhang, R., Hummelgård, M., Örtegren, J., Andersson, H., Olsen, M., Chen, W., . . . Norgren, M. (2023). Energy Harvesting Using Wastepaper-Based Triboelectric Nanogenerators. Advanced Engineering Materials, 25(11), Article ID 2300107.
Open this publication in new window or tab >>Energy Harvesting Using Wastepaper-Based Triboelectric Nanogenerators
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2023 (English)In: Advanced Engineering Materials, ISSN 1438-1656, E-ISSN 1527-2648, Vol. 25, no 11, article id 2300107Article in journal (Refereed) Published
Abstract [en]

Inks and toners used for printing contain materials, such as polyester, with strong triboelectric properties to enhance the binding effects, making wastepaper, such as magazines and newspapers, good candidates for triboelectric materials. Herein, high-output power triboelectric nanogenerators (TENGs) that utilize wastepaper as triboelectric layers (wastepaper-based triboelectric nanogenerators (WP–TENGs)) are reported. Journal paper and office copy paper wastes are investigated. The results show that the maximum power densities of the WP–TENGs reach 43.5 W m−2, which is approximately 250 times the previously reported output of the TENG with a recycled triboelectric layer made from wastepaper. The maximum open circuit voltage (V OC) and short circuit current (I SC) are 774 V and 3.92 mA (784 mA m−2), respectively. These findings can be applied to extend the life cycle of printed papers for energy harvesting, and they can later be applied for materials recycling to enhance the sustainable development of our society. 

Keywords
high output power, life cycle, offset printing, triboelectric nanogenerators, wastepaper
National Category
Condensed Matter Physics
Identifiers
urn:nbn:se:miun:diva-47783 (URN)10.1002/adem.202300107 (DOI)000940118100001 ()2-s2.0-85148999231 (Scopus ID)
Available from: 2023-03-13 Created: 2023-03-13 Last updated: 2023-06-07Bibliographically approved
Norgren, M., Costa, C., Alves, L., Eivazi, A., Dahlström, C., Svanedal, I., . . . Medronho, B. (2023). Perspectives on the Lindman Hypothesis and Cellulose Interactions. Molecules, 28(10), Article ID 4216.
Open this publication in new window or tab >>Perspectives on the Lindman Hypothesis and Cellulose Interactions
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2023 (English)In: Molecules, ISSN 1431-5157, E-ISSN 1420-3049, Vol. 28, no 10, article id 4216Article, review/survey (Refereed) Published
Abstract [en]

In the history of cellulose chemistry, hydrogen bonding has been the predominant explanation when discussing intermolecular interactions between cellulose polymers. This is the general consensus in scholarly textbooks and in many research articles, and it applies to several other biomacromolecules’ interactions as well. This rather unbalanced description of cellulose has likely impacted the development of materials based on the processing of cellulose—for example, via dissolution in various solvent systems and regeneration into solid materials, such as films and fibers, and even traditional wood fiber handling and papermaking. In this review, we take as a starting point the questioning of the general description of the nature of cellulose and cellulose interactions initiated by Professor Björn Lindman, based on generic physicochemical reasoning about surfactants and polymers. This dispute, which became known as “the Lindman hypothesis”, highlights the importance of hydrophobic interactions in cellulose systems and that cellulose is an amphiphilic polymer. This paper elaborates on Björn Lindman’s contribution to the subject, which has caused the scientific community to revisit cellulose and reconsider certain phenomena from other perspectives. 

Place, publisher, year, edition, pages
MDPI, 2023
Keywords
amphiphilicity, cellulose, composite materials, dissolution, emulsification, intermolecular interactions, regeneration
National Category
Paper, Pulp and Fiber Technology
Identifiers
urn:nbn:se:miun:diva-48489 (URN)10.3390/molecules28104216 (DOI)000996673000001 ()2-s2.0-85160675878 (Scopus ID)
Available from: 2023-06-13 Created: 2023-06-13 Last updated: 2023-08-28Bibliographically approved
Stolpe, A., Eivazihollagh, A., Norgren, M., Zhang, R. & Dahlström, C. (2023). Regenerated cellulose TENG with colour printed surface for increased performance. In: Book of Abstracts EPNOE 2023: . Paper presented at The 8th International Polysaccharide Conference, Graz, Austria, September 17-22, 2023 (pp. 132). Graz University of Technology
Open this publication in new window or tab >>Regenerated cellulose TENG with colour printed surface for increased performance
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2023 (English)In: Book of Abstracts EPNOE 2023, Graz University of Technology , 2023, p. 132-Conference paper, Poster (with or without abstract) (Other academic)
Abstract [en]

Triboelectric nanogenerators (TENGs) are ideal to meet the increasing need for green and efficient energy solutions, e.g., in small wireless and/or wearable applications. Regenerated cellulose is an exemplary material regarding both power output and mechanical performance, and it is environmentally friendly and economically favourable. To further improve the triboelectric performance of the cellulose, colour printing was done on the surface with conventional laser printing. Printer toners commonly contain substances with different triboelectric properties. [1] In this work, cellulose fibres were dissolved using a LiOH/urea solvent and regenerated in an ethanol bath and eventually dried under controlled conditions. Thereafter the resulting transparent cellulose films were run through a conventional laser paper printer to apply toners of different colour and patterns on the surface. Cyan, magenta, yellow and black was printed in one layer. In addition, black was printed in certain patterns from low to high coverage and in several layers to evaluate the effect of applied amount. The samples were analysed using SEM, AFM, XRD, FTIR and a TENG was assembled in the contact-separation mode to investigate the triboelectric performance. The printed cellulose films were found to give enhanced triboelectric output. The results show an interesting and simple processing route to enhance the performance of cellulose- based TENG materials that can be useful in the development of cheap and sustainable small wireless electrical generators or sensors.

[1] Zhang, R.; Hummelgård, M.; Örtegren, J.; Andersson, H.; Olsen, M.; Chen, W.; Wang, P.; Eivazi, A.; Dahlström, C.; Norgren, M., Adv. Engin. Mater., 2023, in press, https://doi.org/10.1002/adem.202300107

Place, publisher, year, edition, pages
Graz University of Technology, 2023
National Category
Chemical Engineering
Identifiers
urn:nbn:se:miun:diva-50770 (URN)
Conference
The 8th International Polysaccharide Conference, Graz, Austria, September 17-22, 2023
Available from: 2024-02-27 Created: 2024-02-27 Last updated: 2024-04-05Bibliographically approved
Zhang, R., Hummelgård, M., Örtegren, J., Andersson, H., Olsen, M., Chen, D., . . . Wang, Z. L. (2023). Triboelectric nanogenerators with ultrahigh current density enhanced by hydrogen bonding between nylon and graphene oxide. Nano Energy, 115, Article ID 108737.
Open this publication in new window or tab >>Triboelectric nanogenerators with ultrahigh current density enhanced by hydrogen bonding between nylon and graphene oxide
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2023 (English)In: Nano Energy, ISSN 2211-2855, E-ISSN 2211-3282, Vol. 115, article id 108737Article in journal (Refereed) Published
Abstract [en]

The triboelectric properties of the tribolayers are essential factors affecting the current density of triboelectric nanogenerators (TENGs). To enhance the current density, composites have been developed to tune their triboelectric properties. Previous studies have reported enhanced TENG performance with composite materials, primarily based on their composition, while chemical interactions between the components have been less analyzed. In this study, we report a novel approach to improve the current density of a TENG by introducing dipole-dipole interactions between a nylon filter membrane and graphene oxide (GO) through hydrogen bonds. The Raman spectroscopy confirmed the occurrence of the interactions resulting from hydrogen bonding. The enhancing mechanisms of hydrogen bonds were further analyzed by Kelvin probe force microscope (KPFM) measurement, which demonstrated that hydrogen bonding could influence the surface potential of the coated GO, leading to increased output of the nylon/GO@NFM TENG (NGN-TENG). Our results show that an ultrahigh current density of 1757 mA·m−2 was obtained with a 2 × 2 cm2 NGN-TENG. Additionally, we demonstrated the feasibility of using the NGN-TENG as a motion sensor to sense finger motions. These findings suggest that the introduction of hydrogen bonds in TENG composites can provide a promising route for improving their performance. 

Keywords
Current density, Dipoles, Graphene oxide, KPFM, Nylon (PA66), Triboelectric nanogenerators
National Category
Tribology (Interacting Surfaces including Friction, Lubrication and Wear)
Identifiers
urn:nbn:se:miun:diva-49097 (URN)10.1016/j.nanoen.2023.108737 (DOI)001060205900001 ()2-s2.0-85166197638 (Scopus ID)
Available from: 2023-08-17 Created: 2023-08-17 Last updated: 2024-01-12Bibliographically approved
Dahlström, C., Eivazihollagh, A., Pettersson, T., Rojas, O. J., Zhang, R., Medronho, B. & Norgren, M. (2023). Triboelectric Performance Of Regenerated Cellulose. In: Book of Abstracts EPNOE 2023: . Paper presented at The 8th International Polysaccharide Conference, Graz, Austria, September 17-22, 2023 (pp. 116). Graz University of Technology
Open this publication in new window or tab >>Triboelectric Performance Of Regenerated Cellulose
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2023 (English)In: Book of Abstracts EPNOE 2023, Graz University of Technology , 2023, p. 116-Conference paper, Oral presentation with published abstract (Other academic)
Abstract [en]

Cellulose has shown great potential in the development of green triboelectric nanogenerators (TENG) [1]. Particularly, regenerated cellulose (R-cellulose) has shown remarkably high output power density but the structural features and key parameters that explain such superior performance remain unexplored. In this work, wood cellulose fibers were dissolved in a LiOH(aq)-based solvent to produce a series of R-cellulose films. Regeneration in different alcohols (from methanol to n-pentanol) was performed and the films’ structural features and triboelectric performance were assessed. Nonsolvents of increased hydrophobicity led to R-cellulose films with higher hydrophilic character; the films showed a (1- 10) diffraction peak of larger amplitude and higher apparent crystallinity. An open-circuit voltage (VOC) of up to ca. 260 V and a short-circuit current (ISC) of up to ca. 150 μA were measured for R-cellulose against polytetrafluoroethylene (as negative counter-layer). However, R-cellulose showed an increased VOC of 175% (from 88.1 V) against polydimethylsiloxane from methanol to n-pentanol. The corresponding ISC and output power also increased by 76% (from 89.9 μA) and by 382% (from 8.8 W m–2), respectively. The higher R-cellulose hydrophilicity, combined with soft counter-layer that follow the surface structures increasing the effective contact area, are the leading reasons for a superior triboelectric performance.

[1] Zhang, R., Dahlström, C., Zou, H., Jonzon, J., Hummelgård, M., Örtegren, J., Blomquist, N., Yang, Y., Andersson, H., Olsen, M., Norgren, M., Olin, H. & Wang, Z.L. Adv. Mater. 32, 2002824, 2020; https://doi.org/10.1002/adma.202002824

Place, publisher, year, edition, pages
Graz University of Technology, 2023
National Category
Chemical Engineering
Identifiers
urn:nbn:se:miun:diva-50768 (URN)
Conference
The 8th International Polysaccharide Conference, Graz, Austria, September 17-22, 2023
Available from: 2024-02-27 Created: 2024-02-27 Last updated: 2024-03-05Bibliographically approved
Zhang, R., Hummelgård, M., Örtegren, J., Andersson, H., Olsen, M., Eivazihollagh, A., . . . Chen, W. (2023). Wastepaper-based Triboelectric Nanogenerators. In: Book of Abstracts EPNOE 2023: . Paper presented at The 8th International Polysaccharide Conference, Graz, Austria, September 17-22, 2023. Graz University of Technology
Open this publication in new window or tab >>Wastepaper-based Triboelectric Nanogenerators
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2023 (English)In: Book of Abstracts EPNOE 2023, Graz University of Technology , 2023Conference paper, Poster (with or without abstract) (Other academic)
Abstract [en]

nks and toners used for printing contain materials, such as polyester, with strong triboelectric properties to enhance the binding effects, making wastepaper, such as magazines and newspapers, good candidates for triboelectric materials. In this study, we report high- output power triboelectric nanogenerators (TENGs) that utilize wastepaper as triboelectric layers (wastepaper-based triboelectric nanogenerators (WP–TENGs)) [1]. Journal paper and office copy paper wastes are investigated. The results show that the maximum power densities of the WP–TENGs reach 43.5 W·m-2, which is approximately 250 times the previously reported output of the TENG with a recycled triboelectric layer made from wastepaper [2]. The maximum open circuit voltage (VOC) and short circuit current (ISC) are 774 V and 3.92 mA (784 mA m-2), respectively. These findings can be applied to extend the life cycle of printed papers for energy harvesting, and they can later be applied for materials recycling to enhance the sustainable development of our society.

[1] Zhang, R., Hummelgård, M., Örtegren, J., Andersson, H., Olsen, M., Chen, W., Wang, P., Eivazi, A., Dahlström, C. & Norgren, M. Adv. Engin. Mater., in press, 2023; https://doi.org/10.1002/adem.202300107

[2] Zhang, Z., Jie, Y., Zhu, J., Zhu, Z., Chen, H, Lu, Q., Zeng, Y., Cao, X., Wang, N. & Wang, Z. Nano Res. 15, 1109, 2022; https://doi.org/10.1007/s12274-021-3612-8

Place, publisher, year, edition, pages
Graz University of Technology, 2023
National Category
Chemical Engineering
Identifiers
urn:nbn:se:miun:diva-50774 (URN)
Conference
The 8th International Polysaccharide Conference, Graz, Austria, September 17-22, 2023
Available from: 2024-02-27 Created: 2024-02-27 Last updated: 2024-03-05Bibliographically approved
Zhang, R., Dahlström, C., Zou, H., Jonzon, J., Hummelgård, M., Örtegren, J., . . . Wang, Z. L. (2020). Cellulose-Based Fully Green Triboelectric Nanogenerators with Output Power Density of 300 W m−2. Advanced Materials, 32(38), Article ID 2002824.
Open this publication in new window or tab >>Cellulose-Based Fully Green Triboelectric Nanogenerators with Output Power Density of 300 W m−2
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2020 (English)In: Advanced Materials, ISSN 0935-9648, E-ISSN 1521-4095, Vol. 32, no 38, article id 2002824Article in journal (Refereed) Published
Abstract [en]

Triboelectric nanogenerators (TENGs) have attracted increasing attention because of their excellent energy conversion efficiency, the diverse choice of materials, and their broad applications in energy harvesting devices and self-powered sensors. New materials have been explored, including green materials, but their performances have not yet reached the level of that for fluoropolymers. Here, a high-performance, fully green TENG (FG-TENG) using cellulose-based tribolayers is reported. It is shown that the FG-TENG has an output power density of above 300 W m−2, which is a new record for green-material-based TENGs. The high performance of the FG-TENG is due to the high positive charge density of the regenerated cellulose. The FG-TENG is stable after more than 30 000 cycles of operations in humidity of 30%–84%. This work demonstrates that high-performance TENGs can be made using natural green materials for a broad range of applications. 

Keywords
green materials, regenerated cellulose, triboelectric charge densities, triboelectric nanogenerators
National Category
Condensed Matter Physics
Identifiers
urn:nbn:se:miun:diva-39664 (URN)10.1002/adma.202002824 (DOI)000559916400001 ()2-s2.0-85089454499 (Scopus ID)
Available from: 2020-08-25 Created: 2020-08-25 Last updated: 2022-04-04
Koppolu, R., Blomquist, N., Dahlström, C. & Toivakka, M. (2020). High-Throughput Processing of Nanographite-Nanocellulose-Based Electrodes for Flexible Energy Devices. Industrial & Engineering Chemistry Research, 59(24), 11232-11240
Open this publication in new window or tab >>High-Throughput Processing of Nanographite-Nanocellulose-Based Electrodes for Flexible Energy Devices
2020 (English)In: Industrial & Engineering Chemistry Research, ISSN 0888-5885, E-ISSN 1520-5045, Vol. 59, no 24, p. 11232-11240Article in journal (Refereed) Published
Abstract [en]

The current work aims at understanding factors that influence the processability of nanographite-nanocellulose suspensions onto flexible substrates for production of conductive electrodes. A custom-built slot-die was used in a continuous rollto-roll process to coat the nanomaterial suspension onto substrates with varying surface smoothness, thickness, pore structure, and wet strength. The influence of a carboxymethyl cellulose (CMC) additive on suspension rheology, water release properties, and coating quality was probed. CMC addition reduced the suspension yield stress by 2 orders of magnitude and the average pore diameter of the coated electrodes by 70%. Sheet resistances of 5-9 Omega sq(-1) were obtained for the conductive coatings with a coat weight of 12-24 g m(-2). Calendering reduced the sheet resistance to 1-3 Omega sq(-1) and resistivity to as low as 12 mu Omega m. The coated electrodes were used to demonstrate a metal-free aqueous-electrolyte supercapacitor with a specific capacitance of 63 F g(-1). The results increase our understanding of continuous processing of nanographite-nanocellulose suspensions into electrodes, with potential uses in flexible, lightweight, and environmentally friendly energy devices.

National Category
Materials Engineering
Identifiers
urn:nbn:se:miun:diva-39629 (URN)10.1021/acs.iecr.0c01112 (DOI)000542928000013 ()2-s2.0-85090028369 (Scopus ID)
Available from: 2020-08-18 Created: 2020-08-18 Last updated: 2020-09-08
Blomquist, N., Koppolu, R., Dahlström, C., Toivakka, M. & Olin, H. (2020). Influence of Substrate in Roll-to-roll Coated Nanographite Electrodes for Metal-free Supercapacitors. Scientific Reports, 10(1), Article ID 5282.
Open this publication in new window or tab >>Influence of Substrate in Roll-to-roll Coated Nanographite Electrodes for Metal-free Supercapacitors
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2020 (English)In: Scientific Reports, E-ISSN 2045-2322, Vol. 10, no 1, article id 5282Article in journal (Refereed) Published
Abstract [en]

Due to the high electric conductivity and large surface area of nanographites, such as graphene and graphite nanoplatlets, these materials have gained a large interest for use in energy storage devices. However, due to the thin flake geometry, the viscosity of aqueous suspensions containing these materials is high even at low solids contents. This together with the use of high viscosity bio-based binders makes it challenging to coat in a roll-to-roll process with sufficient coating thickness. Electrode materials for commercial energy storage devices are often suspended by organic solvents at high solids contents and coated onto metal foils used as current-collectors. Another interesting approach is to coat the electrode onto the separator, to enable large-scale production of flat cell stacks. Here, we demonstrate an alternative, water-based approach that utilize slot-die coating to coat aqueous nanographite suspension with nanocellulose binder onto the paper separator, and onto the current collector as reference, in aqueous metal-free supercapacitors. The results show that the difference in device equivalent series resistance (ESR) due to interfacial resistance between electrode and current collector was much lower than expected and thus similar or lower compared to other studies with a aqueous supercapacitors. This indicates that electrode coated paper separator substrates could be a promising approach and a possible route for manufacturing of low-cost, environmentally friendly and metal-free energy storage devices. 

National Category
Condensed Matter Physics
Identifiers
urn:nbn:se:miun:diva-38768 (URN)10.1038/s41598-020-62316-0 (DOI)000563366200029 ()2-s2.0-85082184284 (Scopus ID)
Available from: 2020-04-01 Created: 2020-04-01 Last updated: 2022-09-15
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