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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
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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
Harder, C., Betker, M., Alexakis, A. E., Bulut, Y., Sochor, B., Söderberg, D., . . . Roth, S. V. (2024). Poly(sobrerol methacrylate) Colloidal Inks Sprayed onto Cellulose Nanofibril Thin Films for Anticounterfeiting Applications. ACS Applied Nano Materials, 7(9), 10840-10851
Open this publication in new window or tab >>Poly(sobrerol methacrylate) Colloidal Inks Sprayed onto Cellulose Nanofibril Thin Films for Anticounterfeiting Applications
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2024 (English)In: ACS Applied Nano Materials, E-ISSN 2574-0970, Vol. 7, no 9, p. 10840-10851Article in journal (Refereed) Published
Abstract [en]

The colloidal layer formation on porous materials is a crucial step for printing and applying functional coatings, which can be used to fabricate anticounterfeiting paper. The deposition of colloidal layers and subsequent thermal treatment allows for modifying the hydrophilicity of the surface of a material. In the present work, wood-based colloidal inks are applied by spray deposition on spray-deposited porous cellulose nanofibrils (CNF) films. The surface modification by thermal annealing of the fabricated colloid-cellulose hybrid thin films is investigated in terms of layering and hydrophobicity. The polymer colloids in the inks are core-shell nanoparticles with different sizes and glass transition temperatures (T-g), thus enabling different and low thermal treatment temperatures. The ratio between the core polymers, poly(sobrerol methacrylate) (PSobMA), and poly(-butyl methacrylate) (PBMA) determines the T-g and hence allows for tailoring of the T-g. The layer formation of the colloidal inks on the porous CNF layer depends on the imbibition properties of the CNF layer which is determined by their morphology. The water adhesion of the CNF layer decreases due to the deposition of the colloids and thermal treatment except for the colloids with a size smaller than the void size of the porous CNF film. In this case, the colloids are imbibed into the CNF layer when T-g of the colloids is reached and the polymer chains transit in a mobile phase. Tailored aggregate and nanoscale-embedded hybrid structures are achieved depending on the colloid properties. The imbibition of these colloids into the porous CNF films is verified with grazing incidence small-angle X-ray scattering. This study shows a route for tuning the nanoscale structure and macroscopic physicochemical properties useful for anticounterfeiting paper.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2024
Keywords
cellulose nanofibrils, thin films, wetting, colloids, colloidal films, surface energy, GISAXS
National Category
Paper, Pulp and Fiber Technology
Identifiers
urn:nbn:se:kth:diva-347168 (URN)10.1021/acsanm.4c01302 (DOI)001227987300001 ()2-s2.0-85192139557 (Scopus ID)
Note

QC 20240604

Available from: 2024-06-04 Created: 2024-06-04 Last updated: 2024-06-04Bibliographically 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
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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
Kulkarni, R. A., Apazidis, N., Larsson, P. T., Lundell, F. & Söderberg, D. (2023). Experimental studies of dynamic compression of cellulose pulp fibers. Sustainable Materials and Technologies, 38, Article ID e00774.
Open this publication in new window or tab >>Experimental studies of dynamic compression of cellulose pulp fibers
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2023 (English)In: Sustainable Materials and Technologies, ISSN 2214-9937, Vol. 38, article id e00774Article in journal (Refereed) Published
Abstract [en]

The ability to control the structure of the wood-pulp fiber cell wall is an attractive means to obtain increased accessibility to the fiber interior, providing routes for functionalization of the fibers that support further processing and novel material concepts, e.g. improved degree of polymerization, nanofiltration as demonstrated in previous studies. It has been proposed that dynamic compression and decompression of the cellulose pulp fibers in the wet state make it possible to modify the cell wall significantly. We hypothesize that hydrostatic pressure exerted on fibers fully submerged in water will increase the accessibility of the fiber wall by penetrating the fiber through weak spots in the cell wall. To pursue this, we have developed an experimental facility that can subject wet cellulose pulp samples to a pressure pulse -10 ms long and with a peak pressure of -300 MPa. The experiment is thus specifically designed to elucidate the effect of a rapid high-pressure pulse passing through the cellulose sample and enables studies of changes in structural properties over different size ranges. Different characterization techniques, including Scanning electron microscopy, X-ray diffraction, and wide- and small-angle X-ray scattering, have been used to evaluate the material exposed to pulsed pressure. The mechanism of pressure build-up is estimated computationally to complement the results. Key findings from the experiments consider a decrease in crystallinity and changes in the surface morphology of the cellulose sample.

Place, publisher, year, edition, pages
Elsevier BV, 2023
Keywords
Cellulose fiber modification, Dynamic compression, Accessibility, Cell wall, High-pressure, X-ray scattering, Computations
National Category
Paper, Pulp and Fiber Technology
Identifiers
urn:nbn:se:kth:diva-341813 (URN)10.1016/j.susmat.2023.e00774 (DOI)001122972200001 ()2-s2.0-85179623066 (Scopus ID)
Note

QC 20240103

Available from: 2024-01-03 Created: 2024-01-03 Last updated: 2024-01-03Bibliographically 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
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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
Betker, M., Harder, C., Erbes, E., Heger, J. E., Alexakis, A. E., Sochor, B., . . . Roth, S. V. (2023). Sprayed Hybrid Cellulose Nanofibril-Silver Nanowire Transparent Electrodes for Organic Electronic Applications. ACS Applied Nano Materials, 6(14), 13677-13688
Open this publication in new window or tab >>Sprayed Hybrid Cellulose Nanofibril-Silver Nanowire Transparent Electrodes for Organic Electronic Applications
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2023 (English)In: ACS Applied Nano Materials, E-ISSN 2574-0970, Vol. 6, no 14, p. 13677-13688Article in journal (Refereed) Published
Abstract [en]

In times of climate change and resource scarcity, researchers are aiming to find sustainable alternatives to synthetic polymers for the fabrication of biodegradable, eco-friendly, and, at the same time, high-performance materials. Nanocomposites have the ability to combine several favorable properties of different materials in a single device. Here, we evaluate the suitability of two kinds of inks containing silver nanowires for the fast, facile, and industrial-relevant fabrication of two different types of cellulose-based silver nanowire electrodes via layer-by-layer spray deposition only. The Type I electrode has a layered structure, which is composed of a network of silver nanowires sprayed on top of a cellulose nanofibrils layer, while the Type II electrode consists of a homogeneous mixture of silver nanowires and cellulose nanofibrils. A correlation between the surface structure, conductivity, and transparency of both types of electrodes is established. We use the Haacke figure of merit for transparent electrode materials to demonstrate the favorable influence of cellulose nanofibrils in the spray ink by identifying Type II as the electrode with the lowest sheet resistance (minimum 5 ± 0.04 Ω/sq), while at the same time having a lower surface roughness and shorter fabrication time than Type I. Finally, we prove the mechanical stability of the Type II electrode by bending tests and its long-time stability under ambient conditions. The results demonstrate that the mixed spray ink of silver nanowires and cellulose nanofibrils is perfectly suitable for the fast fabrication of highly conductive organic nanoelectronics on an industrial scale.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2023
Keywords
flexible electrodes, GISAXS, nanocellulose, nanocomposites, silver nanowires, spray deposition, thin films
National Category
Materials Chemistry
Identifiers
urn:nbn:se:kth:diva-335715 (URN)10.1021/acsanm.3c02496 (DOI)001024815000001 ()2-s2.0-85165907980 (Scopus ID)
Note

QC 20230911

Available from: 2023-09-11 Created: 2023-09-11 Last updated: 2023-09-11Bibliographically approved
Chen, Q., Betker, M., Harder, C., Brett, C. J., Schwartzkopf, M., Ulrich, N. M., . . . Roth, S. V. (2022). Biopolymer-Templated Deposition of Ordered and Polymorph Titanium Dioxide Thin Films for Improved Surface-Enhanced Raman Scattering Sensitivity. Advanced Functional Materials, 32(6), Article ID 2108556.
Open this publication in new window or tab >>Biopolymer-Templated Deposition of Ordered and Polymorph Titanium Dioxide Thin Films for Improved Surface-Enhanced Raman Scattering Sensitivity
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2022 (English)In: Advanced Functional Materials, ISSN 1616-301X, E-ISSN 1616-3028, Vol. 32, no 6, article id 2108556Article in journal (Refereed) Published
Abstract [en]

Titanium dioxide (TiO2) is an excellent candidate material for semiconductor metal oxide-based substrates for surface-enhanced Raman scattering (SERS). Biotemplated fabrication of TiO2 thin films with a 3D network is a promising route for effectively transferring the morphology and ordering of the template into the TiO2 layer. The control over the crystallinity of TiO2 remains a challenge due to the low thermal stability of biopolymers. Here is reported a novel strategy of the cellulose nanofibril (CNF)-directed assembly of TiO2/CNF thin films with tailored morphology and crystallinity as SERS substrates. Polymorphous TiO2/CNF thin films with well-defined morphology are obtained by combining atomic layer deposition and thermal annealing. A high enhancement factor of 1.79 × 106 in terms of semiconductor metal oxide nanomaterial (SMON)-based SERS substrates is obtained from the annealed TiO2/CNF thin films with a TiO2 layer thickness of 10 nm fabricated on indium tin oxide (ITO), when probed by 4-mercaptobenzoic acid molecules. Common SERS probes down to 10 nm can be detected on these TiO2/CNF substrates, indicating superior sensitivity of TiO2/CNF thin films among SMON SERS substrates. This improvement in SERS sensitivity is realized through a cooperative modulation of the template morphology of the CNF network and the crystalline state of TiO2.

Place, publisher, year, edition, pages
Wiley, 2022
Keywords
Biomolecules, Biopolymers, Cellulose, Crystallinity, Indium compounds, Magnetic semiconductors, Metals, Morphology, Nanostructured materials, Oxide semiconductors, Raman scattering, Substrates, Surface scattering, Thermodynamic stability, Thin films, Tin oxides, Titanium dioxide, X ray scattering
National Category
Other Physics Topics
Identifiers
urn:nbn:se:kth:diva-312836 (URN)10.1002/adfm.202108556 (DOI)000711528400001 ()2-s2.0-85118229976 (Scopus ID)
Note

QC 20220524

Available from: 2022-05-24 Created: 2022-05-24 Last updated: 2022-06-25Bibliographically approved
Redlinger-Pohn, J. D., Petkovsek, M., Gordeyeva, K., Zupanc, M., Gordeeva, A., Zhang, Q., . . . Söderberg, D. (2022). Cavitation Fibrillation of Cellulose Fiber. Biomacromolecules, 23(3), 847-862
Open this publication in new window or tab >>Cavitation Fibrillation of Cellulose Fiber
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2022 (English)In: Biomacromolecules, ISSN 1525-7797, E-ISSN 1526-4602, Vol. 23, no 3, p. 847-862Article in journal (Refereed) Published
Abstract [en]

Cellulose fibrils are the structural backbone of plants and, if carefully liberated from biomass, a promising building block for a bio-based society. The mechanism of the mechanical release-fibrillation-is not yet understood, which hinders efficient production with the required reliable quality. One promising process for fine fibrillation and total fibrillation of cellulose is cavitation. In this study, we investigate the cavitation treatment of dissolving, enzymatically pretreated, and derivatized (TEMPO oxidized and carboxymethylated) cellulose fiber pulp by hydrodynamic and acoustic (i.e., sonication) cavitation. The derivatized fibers exhibited significant damage from the cavitation treatment, and sonication efficiently fibrillated the fibers into nanocellulose with an elementary fibril thickness. The breakage of cellulose fibers and fibrils depends on the number of cavitation treatment events. In assessing the damage to the fiber, we presume that microstreaming in the vicinity of imploding cavities breaks the fiber into fibrils, most likely by bending. A simple model showed the correlation between the fibrillation of the carboxymethylated cellulose (CMCe) fibers, the sonication power and time, and the relative size of the active zone below the sonication horn.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2022
National Category
Paper, Pulp and Fiber Technology Materials Chemistry
Identifiers
urn:nbn:se:kth:diva-315233 (URN)10.1021/acs.biomac.1c01309 (DOI)000813073400001 ()35099936 (PubMedID)2-s2.0-85124048543 (Scopus ID)
Note

QC 20220701

Available from: 2022-07-01 Created: 2022-07-01 Last updated: 2022-07-07Bibliographically approved
Chen, Q., Sochor, B., Chumakov, A., Betker, M., Ulrich, N. M., Toimil-Molares, M. E., . . . Roth, S. V. (2022). Cellulose-Reinforced Programmable and Stretch-Healable Actuators for Smart Packaging. Advanced Functional Materials, 32(49), 2208074, Article ID 2208074.
Open this publication in new window or tab >>Cellulose-Reinforced Programmable and Stretch-Healable Actuators for Smart Packaging
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2022 (English)In: Advanced Functional Materials, ISSN 1616-301X, E-ISSN 1616-3028, Vol. 32, no 49, p. 2208074-, article id 2208074Article in journal (Refereed) Published
Abstract [en]

Biomimetic actuators are promising candidates for smart soft robotics. The applications of state-of-the-art actuators require the combination of programmable stimuli-responsiveness, excellent robustness, and efficient self-healing ability in a wide-range of working conditions. However, these properties may be mutually exclusive. Inspired by biological tissues, two kinds of polyelectrolytes including polyvinyl alcohol (PVA) and polystyrene sulfonate (PSS) are exploited as the fillers of cellulose nanofibrils (CNFs) for the fabrication of the CNF/PVA/PSS (CAS) film via the assembly of the physically-crosslinked network through multiple H-bonding and electrostatic interactions. Achieved by a casting-evaporation strategy, internal stress is stored within the polymer matrix and transforms into reversible anisotropic bending deformations in response to a humidity gradient. The speed, direction, and pitch of the bending can be programmed by tailoring the internal stresses and geometry of the samples. Moreover, the H-bonded network also contributes to the effective energy dissipation toward high toughness during tensile stretching, as well as self-healing ability during moisture saturation of the CAS films. This enables the fabrication of a humidity-sensitive flower-shaped actuator and self-healable packaging paper. This study presents a biomimetic strategy for the fabrication of multi-functional soft robotics, which holds great promise for applications in the fields of biosensors and smart packaging. 

Place, publisher, year, edition, pages
Wiley, 2022
Keywords
actuations, healing, humidity responses, stretching, toughness, Biomimetics, Cellulose, Energy dissipation, Polyelectrolytes, Robotics, Self-healing materials, Actuation, Biomimetic actuators, Cellulose nanofibrils, Humidity response, Poly(styrene sulfonate), Self-healing abilities, Smart Packaging, Soft robotics, State of the art, Actuators, Bending, Construction, Packaging, Robots
National Category
Materials Engineering
Identifiers
urn:nbn:se:kth:diva-328110 (URN)10.1002/adfm.202208074 (DOI)000863022500001 ()2-s2.0-85139214411 (Scopus ID)
Note

QC 20230602

Available from: 2023-06-02 Created: 2023-06-02 Last updated: 2023-06-02Bibliographically approved
Wang, G., Kudo, M., Daicho, K., Harish, S., Xu, B., Shao, C., . . . Shiomi, J. (2022). Enhanced High Thermal Conductivity Cellulose Filaments via Hydrodynamic Focusing. Nano Letters, 22(21), 8406-8412
Open this publication in new window or tab >>Enhanced High Thermal Conductivity Cellulose Filaments via Hydrodynamic Focusing
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2022 (English)In: Nano Letters, ISSN 1530-6984, E-ISSN 1530-6992, Vol. 22, no 21, p. 8406-8412Article in journal (Refereed) Published
Abstract [en]

Nanocellulose is regarded as a green and renewable nanomaterial that has attracted increased attention. In this study, we demonstrate that nanocellulose materials can exhibit high thermal conductivity when their nanofibrils are highly aligned and bonded in the form of filaments. The thermal conductivity of individual filaments, consisting of highly aligned cellulose nanofibrils, fabricated by the flow-focusing method is measured in dried condition using a T-type measurement technique. The maximum thermal conductivity of the nanocellulose filaments obtained is 14.5 W/m-K, which is approximately five times higher than those of cellulose nanopaper and cellulose nanocrystals. Structural investigations suggest that the crystallinity of the filament remarkably influence their thermal conductivity. Smaller diameter filaments with higher crystallinity, that is, more internanofibril hydrogen bonds and less intrananofibril disorder, tend to have higher thermal conductivity. Temperature-dependence measurements also reveal that the filaments exhibit phonon transport at effective dimension between 2D and 3D. 

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2022
Keywords
crystallinity, filament, flow focusing, Nanocellulose, thermal conductivity, Cellulose, Diameter, Dimensions, Filaments, Hydrogen Bonds, Transport, Hydrodynamics, Nanoparticles, Nanostructures, Focusing, Nanofibers, Temperature distribution, nanomaterial, nanoparticle, Cellulose nanofibrils, Condition, Cristallinity, High thermal conductivity, Hydrodynamic focusing, Measurement techniques, Nano-cellulose, Nano-fibrils, chemistry
National Category
Chemical Sciences
Identifiers
urn:nbn:se:kth:diva-328881 (URN)10.1021/acs.nanolett.2c02057 (DOI)000877600400001 ()36283691 (PubMedID)2-s2.0-85140957245 (Scopus ID)
Note

QC 20230613

Available from: 2023-06-13 Created: 2023-06-13 Last updated: 2023-06-13Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0003-3737-0091

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