kth.sePublications
Change search
Link to record
Permanent link

Direct link
Publications (10 of 13) Show all publications
Brooke, R., Lay, M., Jain, K., Francon, H., Say, M. G., Belaineh, D., . . . Berggren, M. (2022). Nanocellulose and PEDOT:PSS composites and their applications. Polymer Reviews, 1-41
Open this publication in new window or tab >>Nanocellulose and PEDOT:PSS composites and their applications
Show others...
2022 (English)In: Polymer Reviews, ISSN 1558-3724, p. 1-41Article in journal (Refereed) Published
Abstract [en]

The need for achieving sustainable technologies has encouraged research on renewable and biodegradable materials for novel products that are clean, green, and environmentally friendly. Nanocellulose (NC) has many attractive properties such as high mechanical strength and flexibility, large specific surface area, in addition to possessing good wet stability and resistance to tough chemical environments. NC has also been shown to easily integrate with other materials to form composites. By combining it with conductive and electroactive materials, many of the advantageous properties of NC can be transferred to the resulting composites. Conductive polymers, in particular poly(3,4-ethylenedioxythiophene:poly(styrene sulfonate) (PEDOT:PSS), have been successfully combined with cellulose derivatives where suspensions of NC particles and colloids of PEDOT:PSS are made to interact at a molecular level. Alternatively, different polymerization techniques have been used to coat the cellulose fibrils. When processed in liquid form, the resulting mixture can be used as a conductive ink. This review outlines the preparation of NC/PEDOT:PSS composites and their fabrication in the form of electronic nanopapers, filaments, and conductive aerogels. We also discuss the molecular interaction between NC and PEDOT:PSS and the factors that affect the bonding properties. Finally, we address their potential applications in energy storage and harvesting, sensors, actuators, and bioelectronics. 

Place, publisher, year, edition, pages
Informa UK Limited, 2022
Keywords
PEDOT, nanocellulose, composites, cellulose, conductive polymers
National Category
Paper, Pulp and Fiber Technology
Identifiers
urn:nbn:se:kth:diva-321340 (URN)10.1080/15583724.2022.2106491 (DOI)000842101900001 ()2-s2.0-85136111219 (Scopus ID)
Funder
Swedish Foundation for Strategic Research, GMT14-0058
Note

QC 20221114

Available from: 2022-11-11 Created: 2022-11-11 Last updated: 2022-11-14Bibliographically approved
Görür, Y. C., Francon, H., Sethi, J., Maddalena, L., Montanari, C., Reid, M. S., . . . Wågberg, L. (2022). Rapidly Prepared Nanocellulose Hybrids as Gas Barrier, Flame Retardant, and Energy Storage Materials. ACS Applied Nano Materials, 5(7), 9188-9200
Open this publication in new window or tab >>Rapidly Prepared Nanocellulose Hybrids as Gas Barrier, Flame Retardant, and Energy Storage Materials
Show others...
2022 (English)In: ACS Applied Nano Materials, E-ISSN 2574-0970, Vol. 5, no 7, p. 9188-9200Article in journal (Refereed) Published
Abstract [en]

Cellulose nanofibril (CNF) hybrid materials show great promise as sustainable alternatives to oil-based plastics owing to their abundance and renewability. Nonetheless, despite the enormous success achieved in preparing CNF hybrids at the laboratory scale, feasible implementation of these materials remains a major challenge due to the time-consuming and energy-intensive extraction and processing of CNFs. Here, we describe a scalable materials processing platform for rapid preparation (<10 min) of homogeneously distributed functional CNF-gibbsite and CNF-graphite hybrids through a pH-responsive self-assembly mechanism, followed by their application in gas barrier, flame retardancy, and energy storage materials. Incorporation of 5 wt % gibbsite results in strong, transparent, and oxygen barrier CNF-gibbsite hybrid films in 9 min. Increasing the gibbsite content to 20 wt % affords them self-extinguishing properties, while further lowering their dewatering time to 5 min. The strategy described herein also allows for the preparation of freestanding CNF-graphite hybrids (90 wt % graphite) that match the energy storage performance (330 mA h/g at low cycling rates) and processing speed (3 min dewatering) of commercial graphite anodes. Furthermore, these ecofriendly electrodes can be fully recycled, reformed, and reused while maintaining their initial performance. Overall, this versatile concept combines a green outlook with high processing speed and material performance, paving the way toward scalable processing of advanced ecofriendly hybrid materials. 

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2022
Keywords
CNF, functional hybrids, gibbsite, green materials, nanocomposites, self-assembly, Dewatering, Energy storage, Environmental protection, Exfoliation (materials science), Film preparation, Graphene oxide, Graphite, Nanocellulose, Self assembly, Storage (materials), Supercapacitor, Cellulose nanofibrils, Eco-friendly, Energy storage materials, Functional hybrid, Gas barrier, Gibbsites, Hybrids material, Nano-cellulose, Processing speed, Hybrid materials, Energy, Hybrids, Materials, Performance, Processing, Storage, Water Removal
National Category
Materials Chemistry
Identifiers
urn:nbn:se:kth:diva-326185 (URN)10.1021/acsanm.2c01530 (DOI)000820597300001 ()2-s2.0-85135084223 (Scopus ID)
Note

QC 20230502

Available from: 2023-05-02 Created: 2023-05-02 Last updated: 2023-05-02Bibliographically approved
Francon, H., Görür, Y. C., Montanari, C., Larsson, P. A. & Wågberg, L. (2022). Toward Li-ion Graphite Anodes with Enhanced Mechanical and Electrochemical Properties Using Binders from Chemically Modified Cellulose Fibers. ACS Applied Energy Materials, 5(8), 9333-9342
Open this publication in new window or tab >>Toward Li-ion Graphite Anodes with Enhanced Mechanical and Electrochemical Properties Using Binders from Chemically Modified Cellulose Fibers
Show others...
2022 (English)In: ACS Applied Energy Materials, E-ISSN 2574-0962, Vol. 5, no 8, p. 9333-9342Article in journal (Refereed) Published
Abstract [en]

Cellulose nanofibers (CNFs) are bio-sourced nanomaterials, which, after proper chemical modification, exhibit a unique ability to disperse carbon-rich micro- and nanomaterials and can be used in the design of mechanically strong functional nanocomposites. When used in the preparation of graphite anodes for Li-ion batteries, they have the potential to outperform conventional binders such as carboxymethyl cellulose (CMC) and styrene-butadiene rubber (SBR) both electrochemically and mechanically. In this study, cellulose-rich fibers were subjected to three different chemical modifications (including carbonyl-, carboxyl-, and aldehyde-functionalization) to facilitate their fibrillation into CNFs during the preparation of aqueous slurries of graphite and carbon black. Using these binders, graphite anodes were prepared through conventional blade coating. Compared to CMC/SBR reference anodes, all anodes prepared with modified cellulosic fibers as binders performed better in the galvanostatic cycling experiments and in the mechanical cohesion tests they were subjected to. Among them, the aldehyde- and carboxyl-rich fibers performed the best and resulted in a 10% increase in specific capacity with a simultaneous two- and three-fold increase of the electrode material's stress-at-failure and strain-at-break, respectively. In-depth characterizations attributed these results to the distinctive nanostructure and surface chemistry of the composites formed between graphite and these fiber-based binders. 

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2022
Keywords
anode, battery, binder, cellulose, fibers, graphite, Li-ion, Aldehydes, Anodes, Binders, Chemical modification, Ions, Lithium-ion batteries, Nanostructured materials, Styrene, Surface chemistry, Textile fibers, Carbon rich, Carboxymethyl cellulose, Cellulose nanofibers, Chemically modified, Functional nanocomposites, Graphite anode, Modified cellulose fibers, Styrene/butadiene rubbers
National Category
Materials Chemistry
Identifiers
urn:nbn:se:kth:diva-326795 (URN)10.1021/acsaem.2c00525 (DOI)000834178600001 ()2-s2.0-85135902365 (Scopus ID)
Note

QC 20230515

Available from: 2023-05-15 Created: 2023-05-15 Last updated: 2023-05-15Bibliographically approved
Francon, H., Wang, Z., Marais, A., Mystek, K., Piper, A., Granberg, H., . . . Wågberg, L. (2020). Ambient-Dried, 3D-Printable and Electrically Conducting Cellulose Nanofiber Aerogels by Inclusion of Functional Polymers. Advanced Functional Materials, 30(12), Article ID 1909383.
Open this publication in new window or tab >>Ambient-Dried, 3D-Printable and Electrically Conducting Cellulose Nanofiber Aerogels by Inclusion of Functional Polymers
Show others...
2020 (English)In: Advanced Functional Materials, ISSN 1616-301X, E-ISSN 1616-3028, Vol. 30, no 12, article id 1909383Article in journal (Refereed) Published
Abstract [en]

This study presents a novel, green, and efficient way of preparing crosslinked aerogels from cellulose nanofibers (CNFs) and alginate using non-covalent chemistry. This new process can ultimately facilitate the fast, continuous, and large-scale production of porous, light-weight materials as it does not require freeze-drying, supercritical CO2 drying, or any environmentally harmful crosslinking chemistries. The reported preparation procedure relies solely on the successive freezing, solvent-exchange, and ambient drying of composite CNF-alginate gels. The presented findings suggest that a highly-porous structure can be preserved throughout the process by simply controlling the ionic strength of the gel. Aerogels with tunable densities (23-38 kg m(-3)) and compressive moduli (97-275 kPa) can be prepared by using different CNF concentrations. These low-density networks have a unique combination of formability (using molding or 3D-printing) and wet-stability (when ion exchanged to calcium ions). To demonstrate their use in advanced wet applications, the printed aerogels are functionalized with very high loadings of conducting poly(3,4-ethylenedioxythiophene):tosylate (PEDOT:TOS) polymer by using a novel in situ polymerization approach. In-depth material characterization reveals that these aerogels have the potential to be used in not only energy storage applications (specific capacitance of 78 F g(-1)), but also as mechanical-strain and humidity sensors.

Place, publisher, year, edition, pages
Wiley, 2020
Keywords
aerogels, cellulose, nanofibers, organic electronics, poly(3, 4-ethylenedioxythiophene)
National Category
Paper, Pulp and Fiber Technology
Identifiers
urn:nbn:se:kth:diva-300715 (URN)10.1002/adfm.201909383 (DOI)000510685400001 ()2-s2.0-85078930679 (Scopus ID)
Note

QC 20210903

Available from: 2021-09-03 Created: 2021-09-03 Last updated: 2023-03-01Bibliographically approved
Mystek, K., Li, H., Pettersson, T., Francon, H., Svagan, A. J., Larsson, P. A. & Wågberg, L. (2020). Wet-expandable capsules made from partially modified cellulose. Green Chemistry, 22(14), 4581-4592
Open this publication in new window or tab >>Wet-expandable capsules made from partially modified cellulose
Show others...
2020 (English)In: Green Chemistry, ISSN 1463-9262, E-ISSN 1463-9270, Vol. 22, no 14, p. 4581-4592Article in journal (Refereed) Published
Abstract [en]

Preparation of lightweight and biocompatible hollow capsules holds great promise for various advanced engineering applications. Here, we use a heterogeneously modified structure of cellulose, which on the molecular level increases the flexibility of the capsule shell, to form hollow capsules. These capsules expand in the wet state when they are exposed to an external stimulus, in the present case a decreased external pressure. The capsules were prepared by a dropwise precipitation of a propane-saturated solution of cellulose partially modified to dialcohol cellulose, dissolved in a mixture ofN,N-dimethylacetamide and lithium chloride, into a non-solvent. The mechanical properties of the capsules were determined by measuring the expansion of the capsules upon a controlled decrease in external pressure. In addition, indentation measurements using atomic force microscopy were used to independently quantify the moduli of the capsule walls. The results show that the wet, modified cellulose capsules are much softer and, upon the same pressure change, expand significantly more than those made from unmodified cellulose. The greatest expansion observed for the modified capsules was 1.9 times the original volume, which corresponds to a final density of the expanded capsules of about 14 kg m(-3). These capsules therefore hold great potential to form green and lightweight foam-like materials.

Place, publisher, year, edition, pages
ROYAL SOC CHEMISTRY, 2020
National Category
Other Chemistry Topics
Identifiers
urn:nbn:se:kth:diva-278915 (URN)10.1039/d0gc01523g (DOI)000550567200018 ()2-s2.0-85089284846 (Scopus ID)
Note

QC 20201118

Available from: 2020-11-18 Created: 2020-11-18 Last updated: 2022-06-25Bibliographically approved
Francon, H., Benselfelt, T., Granberg, H., Larsson, P. A. & Wågberg, L. (2019). 3D printable nanocellulose aerogels via a green crosslinking approach and a facile evaporation procedure. Paper presented at National Meeting of the American-Chemical-Society (ACS), MAR 31-APR 04, 2019, Orlando, FL. Abstracts of Papers of the American Chemical Society, 257
Open this publication in new window or tab >>3D printable nanocellulose aerogels via a green crosslinking approach and a facile evaporation procedure
Show others...
2019 (English)In: Abstracts of Papers of the American Chemical Society, ISSN 0065-7727, Vol. 257Article in journal, Meeting abstract (Other academic) Published
Place, publisher, year, edition, pages
AMER CHEMICAL SOC, 2019
National Category
Paper, Pulp and Fiber Technology
Identifiers
urn:nbn:se:kth:diva-257628 (URN)000478860502770 ()
Conference
National Meeting of the American-Chemical-Society (ACS), MAR 31-APR 04, 2019, Orlando, FL
Note

QC 20190902

Available from: 2019-09-02 Created: 2019-09-02 Last updated: 2022-06-26Bibliographically approved
Erlandsson, J., Francon, H., Marais, A., Granberg, H. & Wågberg, L. (2019). Cross-Linked and Shapeable Porous 3D Substrates from Freeze-Linked Cellulose Nanofibrils. Biomacromolecules, 20(2), 728-737
Open this publication in new window or tab >>Cross-Linked and Shapeable Porous 3D Substrates from Freeze-Linked Cellulose Nanofibrils
Show others...
2019 (English)In: Biomacromolecules, ISSN 1525-7797, E-ISSN 1526-4602, Vol. 20, no 2, p. 728-737Article in journal (Refereed) Published
Abstract [en]

Chemically cross-linked highly porous nano cellulose aerogels with complex shapes have been prepared using a freeze-linking procedure that avoids common post activation of cross-linking reactions and freeze-drying. The aerogel shapes ranged from simple geometrical three-dimensional bodies to swirls and solenoids. This was achieved by molding or extruding a periodate oxidized cellulose nanofibril (CNF) dispersion prior to chemical cross-linking in a regular freezer or by reshaping an already prepared aerogel by plasticizing the structure in water followed by reshaping and locking the aerogel into its new shape. The new shapes were most likely retained by new cross-links formed between CNFs brought into contact by the deformation during reshaping. This self-healing ability to form new bonds after plasticization and redrying also contributed to the mechanical resilience of the aerogels, allowing them to be cyclically deformed in the dry state, reswollen with water, and redried with good retention of mechanical integrity. Furthermore, by exploiting the shapeability and available inner structure of the aerogels, a solenoid-shaped aerogel with all surfaces coated with a thin film of conducting polypyrrole was able to produce a magnetic field inside the solenoid, demonstrating electromagnetic properties. Furthermore, by biomimicking the porous interior and stiff exterior of the beak of a toucan bird, a functionalized aerogel was created by applying a 300 mu m thick stiff wax coating on its molded external surfaces. This composite material displayed a 10-times higher elastic modulus compared to that of the plain aerogel without drastically increasing the density. These examples show that it is possible to combine advanced shaping with functionalization of both the inner structure and the surface of the aerogels, radically extending the possible use of CNF aerogels.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2019
National Category
Materials Chemistry
Identifiers
urn:nbn:se:kth:diva-245946 (URN)10.1021/acs.biomac.8b01412 (DOI)000458937200016 ()30394086 (PubMedID)2-s2.0-85057560598 (Scopus ID)
Note

QC 20220119

Available from: 2019-03-12 Created: 2019-03-12 Last updated: 2023-03-01Bibliographically approved
Francon, H., Erlandsson, J., Lopez Duran, V., Granberg, H. & Wågberg, L. (2018). Novel method for producing formable low-density materials from self-assembled cellulose nanofibrils. Paper presented at 255th National Meeting and Exposition of the American-Chemical-Society (ACS) - Nexus of Food, Energy, and Water, MAR 18-22, 2018, New Orleans, LA. Abstracts of Papers of the American Chemical Society, 255
Open this publication in new window or tab >>Novel method for producing formable low-density materials from self-assembled cellulose nanofibrils
Show others...
2018 (English)In: Abstracts of Papers of the American Chemical Society, ISSN 0065-7727, Vol. 255Article in journal, Meeting abstract (Other academic) Published
Place, publisher, year, edition, pages
American Chemical Society (ACS), 2018
National Category
Chemical Sciences
Identifiers
urn:nbn:se:kth:diva-269619 (URN)000435537703007 ()
Conference
255th National Meeting and Exposition of the American-Chemical-Society (ACS) - Nexus of Food, Energy, and Water, MAR 18-22, 2018, New Orleans, LA
Note

QC 20200310

Available from: 2020-03-10 Created: 2020-03-10 Last updated: 2024-03-18Bibliographically approved
Wågberg, L., Granberg, H., Erlandsson, J., Francon, H., Zou, F. & Östmans, R. (2018). Spreading of water in low density nanocellulose networks: From capillaries to specific surface area. Paper presented at 255th National Meeting and Exposition of the American-Chemical-Society (ACS) - Nexus of Food, Energy, and Water, MAR 18-22, 2018, New Orleans, LA. Abstracts of Papers of the American Chemical Society, 255
Open this publication in new window or tab >>Spreading of water in low density nanocellulose networks: From capillaries to specific surface area
Show others...
2018 (English)In: Abstracts of Papers of the American Chemical Society, ISSN 0065-7727, Vol. 255Article in journal, Meeting abstract (Other academic) Published
Place, publisher, year, edition, pages
American Chemical Society (ACS), 2018
National Category
Chemical Sciences
Identifiers
urn:nbn:se:kth:diva-269621 (URN)000435537703022 ()
Conference
255th National Meeting and Exposition of the American-Chemical-Society (ACS) - Nexus of Food, Energy, and Water, MAR 18-22, 2018, New Orleans, LA
Note

QC 20200310

Available from: 2020-03-10 Created: 2020-03-10 Last updated: 2022-06-26Bibliographically approved
Wågberg, L., Hamedi, M., Marais, A., Nyström, G., Francon, H., Granberg, H. & Erlandsson, J. (2018). The use of the layer-by-layer technology and low density networks of cellulose nanofibrils for preparing new materials for energy storage. Paper presented at 255th National Meeting and Exposition of the American-Chemical-Society (ACS) - Nexus of Food, Energy, and Water, MAR 18-22, 2018, New Orleans, LA. Abstracts of Papers of the American Chemical Society, 255
Open this publication in new window or tab >>The use of the layer-by-layer technology and low density networks of cellulose nanofibrils for preparing new materials for energy storage
Show others...
2018 (English)In: Abstracts of Papers of the American Chemical Society, ISSN 0065-7727, Vol. 255Article in journal, Meeting abstract (Other academic) Published
Place, publisher, year, edition, pages
American Chemical Society (ACS), 2018
National Category
Chemical Sciences
Identifiers
urn:nbn:se:kth:diva-240172 (URN)000435537702661 ()
Conference
255th National Meeting and Exposition of the American-Chemical-Society (ACS) - Nexus of Food, Energy, and Water, MAR 18-22, 2018, New Orleans, LA
Note

QC 20181214

Available from: 2018-12-14 Created: 2018-12-14 Last updated: 2022-10-24Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-0534-4633

Search in DiVA

Show all publications