kth.sePublications
Change search
Link to record
Permanent link

Direct link
Alternative names
Publications (10 of 38) Show all publications
Nygård, K., Rosén, T., Gordeyeva, K., Söderberg, D., Cerenius, Y. & et al., . (2024). ForMAX – a beamline for multiscale and multimodal structural characterization of hierarchical materials. Journal of Synchrotron Radiation, 31(2), 363-377
Open this publication in new window or tab >>ForMAX – a beamline for multiscale and multimodal structural characterization of hierarchical materials
Show others...
2024 (English)In: Journal of Synchrotron Radiation, ISSN 0909-0495, E-ISSN 1600-5775, Vol. 31, no 2, p. 363-377Article in journal (Refereed) Published
Abstract [en]

The ForMAX beamline at the MAX IV Laboratory provides multiscale and multimodal structural characterization of hierarchical materials in the nanometre to millimetre range by combining small- and wide-angle X-ray scattering with full-field microtomography. The modular design of the beamline is optimized for easy switching between different experimental modalities. The beamline has a special focus on the development of novel fibrous materials from forest resources, but it is also well suited for studies within, for example, food science and biomedical research.

Place, publisher, year, edition, pages
International Union of Crystallography (IUCr), 2024
Keywords
fibrous materials, full-field X-ray microtomography, hierarchical materials, multimodal structural characterization, multiscale structural characterization, small-angle X-ray scattering, wide-angle X-ray scattering
National Category
Composite Science and Engineering Atom and Molecular Physics and Optics
Identifiers
urn:nbn:se:kth:diva-344572 (URN)10.1107/S1600577524001048 (DOI)38386565 (PubMedID)2-s2.0-85186960905 (Scopus ID)
Note

QC 20240325

Available from: 2024-03-20 Created: 2024-03-20 Last updated: 2024-03-25Bibliographically approved
Motezakker, A. R., Córdoba, A., Rosén, T., Lundell, F. & Söderberg, D. (2023). Effect of Stiffness on the Dynamics of Entangled Nanofiber Networks at Low Concentrations. Macromolecules, 56(23), 9595-9603
Open this publication in new window or tab >>Effect of Stiffness on the Dynamics of Entangled Nanofiber Networks at Low Concentrations
Show others...
2023 (English)In: Macromolecules, ISSN 0024-9297, E-ISSN 1520-5835, Vol. 56, no 23, p. 9595-9603Article in journal, Editorial material (Refereed) Published
Abstract [en]

Biopolymer network dynamics play a significant role in both biological and materials science. This study focuses on the dynamics of cellulose nanofibers as a model system given their relevance to biology and nanotechnology applications. Using large-scale coarse-grained simulations with a lattice Boltzmann fluid coupling, we investigated the reptation behavior of individual nanofibers within entangled networks. Our analysis yields essential insights, proposing a scaling law for rotational diffusion, quantifying effective tube diameter, and revealing release mechanisms during reptation, spanning from rigid to semiflexible nanofibers. Additionally, we examine the onset of entanglement in relation to the nanofiber flexibility within the network. Microrheology analysis is conducted to assess macroscopic viscoelastic behavior. Importantly, our results align closely with previous experiments, validating the proposed scaling laws, effective tube diameters, and onset of entanglement. The findings provide an improved fundamental understanding of biopolymer network dynamics and guide the design of processes for advanced biobased materials. 

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2023
National Category
Biophysics Bioinformatics (Computational Biology)
Identifiers
urn:nbn:se:kth:diva-343525 (URN)10.1021/acs.macromol.3c01526 (DOI)001141570800001 ()2-s2.0-85178555657 (Scopus ID)
Funder
Swedish Research Council, 2018-06469Knut and Alice Wallenberg Foundation
Note

QC 20240216

Available from: 2024-02-15 Created: 2024-02-15 Last updated: 2024-05-31Bibliographically approved
Rosén, T., He, H., Wang, R., Gordeyeva, K., Motezakker, A. R., Fluerasu, A., . . . Hsiao, B. S. (2023). Exploring nanofibrous networks with x-ray photon correlation spectroscopy through a digital twin. Physical review. E, 108(1), Article ID 014607.
Open this publication in new window or tab >>Exploring nanofibrous networks with x-ray photon correlation spectroscopy through a digital twin
Show others...
2023 (English)In: Physical review. E, ISSN 2470-0045, E-ISSN 2470-0053, Vol. 108, no 1, article id 014607Article in journal (Refereed) Published
Abstract [en]

We demonstrate a framework of interpreting data from x-ray photon correlation spectroscopy experiments with the aid of numerical simulations to describe nanoscale dynamics in soft matter. This is exemplified with the transport of passive tracer gold nanoparticles in networks of charge-stabilized cellulose nanofibers. The main structure of dynamic modes in reciprocal space could be replicated with a simulated system of confined Brownian motion, a digital twin, allowing for a direct measurement of important effective material properties describing the local environment of the tracers. 

Keywords
Cellulose nanofibers, Gold nanoparticle, Gold Nanoparticles, In networks, Main structure, Nano scale, Nano-fibrous, Passive tracers, Soft matter, X-ray photon correlation spectroscopy
National Category
Condensed Matter Physics
Identifiers
urn:nbn:se:kth:diva-335240 (URN)10.1103/physreve.108.014607 (DOI)001055203100002 ()37583188 (PubMedID)2-s2.0-85166735615 (Scopus ID)
Note

QC 20230904

Available from: 2023-09-04 Created: 2023-09-04 Last updated: 2024-05-31Bibliographically approved
Gowda, V. K., Rosén, T., Roth, S. V., Söderberg, D. & Lundell, F. (2022). Nanofibril Alignment during Assembly Revealed by an X-ray Scattering-Based Digital Twin. ACS Nano, 16(2), 2120-2132
Open this publication in new window or tab >>Nanofibril Alignment during Assembly Revealed by an X-ray Scattering-Based Digital Twin
Show others...
2022 (English)In: ACS Nano, ISSN 1936-0851, E-ISSN 1936-086X, Vol. 16, no 2, p. 2120-2132Article in journal (Refereed) Published
Abstract [en]

The nanostructure, primarily particle orientation, controls mechanical and functional (e.g., mouthfeel, cell compatibility, optical, morphing) properties when macroscopic materials are assembled from nanofibrils. Understanding and controlling the nanostructure is therefore an important key for the continued development of nanotechnology. We merge recent developments in the assembly of biological nanofibrils, X-ray diffraction orientation measurements, and computational fluid dynamics of complex flows. The result is a digital twin, which reveals the complete particle orientation in complex and transient flow situations, in particular the local alignment and spatial variation of the orientation distributions of different length fractions, both along the process and over a specific cross section. The methodology forms a necessary foundation for analysis and optimization of assembly involving anisotropic particles. Furthermore, it provides a bridge between advanced in operandi measurements of nanostructures and phenomena such as transitions between liquid crystal states and in silico studies of particle interactions and agglomeration.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2022
Keywords
alignment, cellulose nanofibrils, flow-focusing, X-ray scattering, rotary diffusion, assembly
National Category
Physical Chemistry Fluid Mechanics and Acoustics Materials Chemistry
Identifiers
urn:nbn:se:kth:diva-311622 (URN)10.1021/acsnano.1c07769 (DOI)000776691400036 ()35104107 (PubMedID)2-s2.0-85124313849 (Scopus ID)
Note

QC 20220502

Available from: 2022-05-02 Created: 2022-05-02 Last updated: 2023-09-19Bibliographically approved
Wang, R., He, H., Sharma, P. R., Tian, J., Söderberg, L. D., Rosén, T. & Hsiao, B. S. (2022). Unexpected Gelation Behavior of Cellulose Nanofibers Dispersed in Glycols. Macromolecules, 55(21), 9527-9536
Open this publication in new window or tab >>Unexpected Gelation Behavior of Cellulose Nanofibers Dispersed in Glycols
Show others...
2022 (English)In: Macromolecules, ISSN 0024-9297, E-ISSN 1520-5835, Vol. 55, no 21, p. 9527-9536Article in journal (Refereed) Published
Abstract [en]

In this study, the gelation behavior of TEMPO-oxidized wood-based cellulose nanofiber (CNF) suspensions in two different glycols, ethylene glycol (EG) and propylene glycol (PG), was investigated near the overlap concentration and compared with that of aqueous CNF suspensions. The flow property of these non-aqueous and aqueous CNF suspensions was characterized by rheological, UV-vis, and rheo-optical techniques. It was found that the CNF(PG) suspensions exhibited stirring-reversible gelation behavior, where gelation could be induced simply by resting (i.e., prolonged holding time). However, this behavior was not observed for CNF(EG) and CNF(aq) suspensions. Higher temperature and higher CNF concentration could accelerate the gelation process of CNFs in PG, but no large-scale phase separation was detected by the optical techniques. Our study suggests that the reduced hydrophilic attraction between CNFs in PG is the main driving force for forming CNF-rich micro-domains, yielding a physically crosslinked network. This study suggests that the choice of solvent can be used to tailor and control the flow behavior of CNF suspensions, leading to designs of new cellulose-enabled nanocomposites for varying applications. 

Place, publisher, year, edition, pages
American Chemical Society, 2022
Keywords
Behavior, Cellulose, Dispersions, Ethylene Glycol, Gelation, Glycols, Polyols, Wood, Nanocellulose, Nanofibers, Phase separation, Suspensions (fluids), Cellulose nanofibers, Flow properties, Gelation behavior, Highest temperature, Holding time, Non-aqueous, Optical technique, Overlap concentration, Propylene glycols, Rheo-optical, Ethylene
National Category
Bio Materials
Identifiers
urn:nbn:se:kth:diva-328809 (URN)10.1021/acs.macromol.2c01035 (DOI)000873802800001 ()2-s2.0-85140305060 (Scopus ID)
Note

QC 20230613

Available from: 2023-06-13 Created: 2023-06-13 Last updated: 2023-06-13Bibliographically approved
Brouzet, C., Mittal, N., Rosén, T., Takeda, Y., Söderberg, D., Lundell, F. & Takana, H. (2021). Effect of Electric Field on the Hydrodynamic Assembly of Polydisperse and Entangled Fibrillar Suspensions. Langmuir, 37(27), 8339-8347
Open this publication in new window or tab >>Effect of Electric Field on the Hydrodynamic Assembly of Polydisperse and Entangled Fibrillar Suspensions
Show others...
2021 (English)In: Langmuir, ISSN 0743-7463, E-ISSN 1520-5827, Vol. 37, no 27, p. 8339-8347Article in journal (Refereed) Published
Abstract [en]

Dynamics of colloidal particles can be controlled by the application of electric fields at micrometer-nanometer length scales. Here, an electric field-coupled microfluidic flow-focusing device is designed for investigating the effect of an externally applied alternating current (AC) electric field on the hydrodynamic assembly of cellulose nanofibrils (CNFs). We first discuss how the nanofibrils align parallel to the direction of the applied field without flow. Then, we apply an electric field during hydrodynamic assembly in the microfluidic channel and observe the effects on the mechanical properties of the assembled nanostructures. We further discuss the nanoscale orientational dynamics of the polydisperse and entangled fibrillar suspension of CNFs in the channel. It is shown that electric fields induced with the electrodes locally increase the degree of orientation. However, hydrodynamic alignment is demonstrated to be much more efficient than the electric field for aligning CNFs. The results are useful for understanding the development of the nanostructure when designing high-performance materials with microfluidics in the presence of external stimuli.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2021
National Category
Fluid Mechanics and Acoustics
Identifiers
urn:nbn:se:kth:diva-299107 (URN)10.1021/acs.langmuir.1c01196 (DOI)000674276700029 ()34176263 (PubMedID)2-s2.0-85110398273 (Scopus ID)
Note

QC 20210803

Available from: 2021-08-03 Created: 2021-08-03 Last updated: 2022-06-25Bibliographically approved
Rosén, T., Hsiao, B. S. & Söderberg, D. (2021). Elucidating the Opportunities and Challenges for Nanocellulose Spinning. Advanced Materials, 33(28), 2001238
Open this publication in new window or tab >>Elucidating the Opportunities and Challenges for Nanocellulose Spinning
2021 (English)In: Advanced Materials, ISSN 0935-9648, E-ISSN 1521-4095, Vol. 33, no 28, p. 2001238-Article in journal (Refereed) Published
Abstract [en]

Man-made continuous fibers play an essential role in society today. With the increase in global sustainability challenges, there is a broad spectrum of societal needs where the development of advanced biobased fibers could provide means to address the challenges. Biobased regenerated fibers, produced from dissolved cellulose are widely used today for clothes, upholstery, and linens. With new developments in the area of advanced biobased fibers, it would be possible to compete with high-performance synthetic fibers such as glass fibers and carbon fibers as well as to provide unique functionalities. One possible development is to fabricate fibers by spinning filaments from nanocellulose, Nature's nanoscale high-performance building block, which will require detailed insights into nanoscale assembly mechanisms during spinning, as well as knowledge regarding possible functionalization. If successful, this could result in a new class of man-made biobased fibers. This work aims to identify the progress made in the field of spinning of nanocellulose filaments, as well as outline necessary steps for efficient fabrication of such nanocellulose-based filaments with controlled and predictable properties.

Place, publisher, year, edition, pages
Wiley, 2021
Keywords
fiber spinning, flow, nanocellulose, nanostructures, orientation, Cellulose, Cellulose nanocrystals, Fibers, Bio-based, Broad spectrum, Continuous fibers, Functionalizations, Global sustainability, High performance buildings, Nano scale, Nanoscale assemblies, Spinning (fibers)
National Category
Bio Materials
Identifiers
urn:nbn:se:kth:diva-285354 (URN)10.1002/adma.202001238 (DOI)000561966400001 ()32830341 (PubMedID)2-s2.0-85089735471 (Scopus ID)
Note

QC 20201201

Available from: 2020-12-01 Created: 2020-12-01 Last updated: 2022-06-25Bibliographically approved
Bagge, J., Rosén, T., Lundell, F. & Tornberg, A.-K. (2021). Parabolic velocity profile causes shape-selective drift of inertial ellipsoids. Journal of Fluid Mechanics, 926, Article ID A24.
Open this publication in new window or tab >>Parabolic velocity profile causes shape-selective drift of inertial ellipsoids
2021 (English)In: Journal of Fluid Mechanics, ISSN 0022-1120, E-ISSN 1469-7645, Vol. 926, article id A24Article in journal (Refereed) Published
Abstract [en]

Understanding particle drift in suspension flows is of the highest importance in numerous engineering applications where particles need to be separated and filtered out from the suspending fluid. Commonly known drift mechanisms such as the Magnus force, Saffman force and Segre-Silberberg effect all arise only due to inertia of the fluid, with similar effects on all non-spherical particle shapes. In this work, we present a new shape-selective lateral drift mechanism, arising from particle inertia rather than fluid inertia, for ellipsoidal particles in a parabolic velocity profile. We show that the new drift is caused by an intermittent tumbling rotational motion in the local shear flow together with translational inertia of the particle, while rotational inertia is negligible. We find that the drift is maximal when particle inertial forces are of approximately the same order of magnitude as viscous forces, and that both extremely light and extremely heavy particles have negligible drift. Furthermore, since tumbling motion is not a stable rotational state for inertial oblate spheroids (nor for spheres), this new drift only applies to prolate spheroids or tri-axial ellipsoids. Finally, the drift is compared with the effect of gravity acting in the directions parallel and normal to the flow. The new drift mechanism is stronger than gravitational effects as long as gravity is less than a critical value. The critical gravity is highest (i.e. the new drift mechanism dominates over gravitationally induced drift mechanisms) when gravity acts parallel to the flow and the particles are small.

Place, publisher, year, edition, pages
Cambridge University Press (CUP), 2021
Keywords
particle, fluid flow, boundary integral methods, suspensions
National Category
Fluid Mechanics and Acoustics
Identifiers
urn:nbn:se:kth:diva-302625 (URN)10.1017/jfm.2021.716 (DOI)000695413500001 ()2-s2.0-85114497082 (Scopus ID)
Note

QC 20211006

Available from: 2021-10-06 Created: 2021-10-06 Last updated: 2023-05-16Bibliographically approved
Rosén, T., Wang, R., He, H., Zhan, C., Chodankar, S. & Hsiao, B. S. (2021). Shear-free mixing to achieve accurate temporospatial nanoscale kinetics through scanning-SAXS: ion-induced phase transition of dispersed cellulose nanocrystals. Lab on a Chip, 21(6), 1084-1095
Open this publication in new window or tab >>Shear-free mixing to achieve accurate temporospatial nanoscale kinetics through scanning-SAXS: ion-induced phase transition of dispersed cellulose nanocrystals
Show others...
2021 (English)In: Lab on a Chip, ISSN 1473-0197, E-ISSN 1473-0189, Vol. 21, no 6, p. 1084-1095Article in journal (Refereed) Published
Abstract [en]

Time-resolved in situ characterization of well-defined mixing processes using small-angle X-ray scattering (SAXS) is usually challenging, especially if the process involves changes of material viscoelasticity. In specific, it can be difficult to create a continuous mixing experiment without shearing the material of interest; a desirable situation since shear flow both affects nanoscale structures and flow stability as well as resulting in unreliable time-resolved data. Here, we demonstrate a flow-focusing mixing device for in situ nanostructural characterization using scanning-SAXS. Given the interfacial tension and viscosity ratio between core and sheath fluids, the core material confined by sheath flows is completely detached from the walls and forms a zero-shear plug flow at the channel center, allowing for a trivial conversion of spatial coordinates to mixing times. With this technique, the time-resolved gel formation of dispersed cellulose nanocrystals (CNCs) was studied by mixing with a sodium chloride solution. It is observed how locally ordered regions, so called tactoids, are disrupted when the added monovalent ions affect the electrostatic interactions, which in turn leads to a loss of CNC alignment through enhanced rotary diffusion. The demonstrated flow-focusing scanning-SAXS technique can be used to unveil important kinetics during structural formation of nanocellulosic materials. However, the same technique is also applicable in many soft matter systems to provide new insights into the nanoscale dynamics during mixing.

Place, publisher, year, edition, pages
Royal Society of Chemistry (RSC), 2021
National Category
Chemical Sciences
Identifiers
urn:nbn:se:kth:diva-292980 (URN)10.1039/d0lc01048k (DOI)000632163600004 ()33514993 (PubMedID)2-s2.0-85103265495 (Scopus ID)
Note

QC 20210419

Available from: 2021-04-19 Created: 2021-04-19 Last updated: 2022-06-25Bibliographically approved
Rosén, T., Wang, R., He, H., Zhan, C., Chodankar, S. & Hsiao, B. S. (2021). Understanding ion-induced assembly of cellulose nanofibrillar gels through shear-free mixing and in situ scanning-SAXS. Nanoscale Advances, 3(17), 4940-4951
Open this publication in new window or tab >>Understanding ion-induced assembly of cellulose nanofibrillar gels through shear-free mixing and in situ scanning-SAXS
Show others...
2021 (English)In: Nanoscale Advances, E-ISSN 2516-0230, Vol. 3, no 17, p. 4940-4951Article in journal (Refereed) Published
Abstract [en]

During the past decade, cellulose nanofibrils (CNFs) have shown tremendous potential as a building block to fabricate new advanced materials that are both biocompatible and biodegradable. The excellent mechanical properties of the individual CNF can be transferred to macroscale fibers through careful control in hydrodynamic alignment and assembly processes. The optimization of such processes relies on the understanding of nanofibril dynamics during the process, which in turn requires in situ characterization. Here, we use a shear-free mixing experiment combined with scanning small-angle X-ray scattering (scanning-SAXS) to provide time-resolved nanoscale kinetics during the in situ assembly of dispersed cellulose nanofibrils (CNFs) upon mixing with a sodium chloride solution. The addition of monovalent ions led to the transition to a volume-spanning arrested (gel) state. The transition of CNFs is associated with segmental aggregation of the particles, leading to a connected network and reduced Brownian motion, whereby an aligned structure can be preserved. Furthermore, we find that the extensional flow seems to enhance the formation of these segmental aggregates, which in turn provides a comprehensible explanation for the superior material properties obtained in shear-free processes used for spinning filaments from CNFs. This observation clearly highlights the need for different assembly strategies depending on morphology and interactions of the dispersed nanoparticles, where this work can be used as a guide for improved nanomaterial processes.

Place, publisher, year, edition, pages
Royal Society of Chemistry (RSC), 2021
Keywords
Nanofibers, nanostructures, X-ray scattering, SAXS, flow, nanoscale assemblies
National Category
Physical Chemistry Condensed Matter Physics
Research subject
Fibre and Polymer Science; Physics, Material and Nano Physics
Identifiers
urn:nbn:se:kth:diva-306559 (URN)10.1039/d1na00236h (DOI)000678509300001 ()34485817 (PubMedID)2-s2.0-85113742586 (Scopus ID)
Note

QC 20211221

Available from: 2021-12-17 Created: 2021-12-17 Last updated: 2024-03-18Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-2346-7063

Search in DiVA

Show all publications