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Sethi, Jatin
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Publications (7 of 7) Show all publications
Sethi, J., Glowacki, E., Reid, M. S., Larsson, P. A. & Wågberg, L. (2024). Ultra-thin parylene-aluminium hybrid coatings on nanocellulose films to resist water sensitivity. Carbohydrate Polymers, 323, 121365, Article ID 121365.
Open this publication in new window or tab >>Ultra-thin parylene-aluminium hybrid coatings on nanocellulose films to resist water sensitivity
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2024 (English)In: Carbohydrate Polymers, ISSN 0144-8617, E-ISSN 1879-1344, Vol. 323, p. 121365-, article id 121365Article in journal (Refereed) Published
Abstract [en]

Non-sustainable single-use plastics used for food packaging needs to be phased out. Films made from cellulose nanofibrils (CNFs) are suitable candidates for biodegradable and recyclable packaging materials as they exhibit good mechanical properties, excellent oxygen barrier properties and high transparency. Yet, their poor water vapour barrier properties have been a major hindrance in their commercialisation. Here, we describe the preparation of 25 μm thick CNF films with significantly improved water vapour barrier properties after deposition of ultrathin polymeric and metallic coatings, parylene C and aluminium, respectively. When first adding a 40 nm aluminium layer followed by an 80 nm parylene layer, i.e. with a combined thickness of less than one percent of the CNF film, a water vapour transmission rate of 2.8 g m−2 d−1 was achieved at 38 °C and 90 % RH, surpassing a 25 μm polypropylene film (4–12 g m−2 d−1). This is an improvement of more than 700 times compared to uncoated CNF films, under some of the harshest possible conditions a packaging material will need to endure in commercial use. The layers showed a good and even coverage, as assessed by atomic force microscopy, and the parylene-coated surfaces were hydrophobic with a contact angle of 110°, providing good water repellency.

Place, publisher, year, edition, pages
Elsevier BV, 2024
Keywords
Aluminium, Cellulose nanofibrils, Coatings, Parylene, Vapour deposition, Water vapour barrier
National Category
Condensed Matter Physics Paper, Pulp and Fiber Technology
Identifiers
urn:nbn:se:kth:diva-337409 (URN)10.1016/j.carbpol.2023.121365 (DOI)001086726500001 ()2-s2.0-85172102025 (Scopus ID)
Note

QC 20231003

Available from: 2023-10-03 Created: 2023-10-03 Last updated: 2023-11-07Bibliographically 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
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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
Sethi, J., Wågberg, L. & Larsson, P. A. (2022). Water-resistant hybrid cellulose nanofibril films prepared by charge reversal on gibbsite nanoclays. Carbohydrate Polymers, 295, Article ID 119867.
Open this publication in new window or tab >>Water-resistant hybrid cellulose nanofibril films prepared by charge reversal on gibbsite nanoclays
2022 (English)In: Carbohydrate Polymers, ISSN 0144-8617, E-ISSN 1879-1344, Vol. 295, article id 119867Article in journal (Refereed) Published
Abstract [en]

A novel method is reported for the preparation of a hybrid gibbsite-cellulose nanofibril (CNF) nanocomposite film with improved wet and dry mechanical properties and barrier properties. A gibbsite and cationic CNF dispersion was dewatered at pH 7 to prepare well-ordered films. Thereafter, the charge on gibbsite was reversed by dipping the film in pH 12 water to induce an ionic interaction between CNFs and gibbsite, enhancing the film properties; modulus improved from 9 GPa to 12 GPa, with a maintained strain-at-break of 6 % and tensile strength of 190 MPa. Additionally, the charge-reversed film swelled a factor of 24 less than a film without any gibbsite. At 23 °C and 80 % RH, the oxygen barrier properties were improved by a factor of 28, to a value of 18 ml·μm·m−2·kPa−1·24 h−1 and the water vapour barrier properties were improved by a factor of 12, to a value of 105 g·μm·m−2·kPa−1·24 h−1. 

Place, publisher, year, edition, pages
Elsevier BV, 2022
Keywords
Cellulose, Cellulose nanofibril, Charge reversal, Gas barrier, Gibbsite, Nanoclay, Water resistance, Cellulose films, Film preparation, Gas permeable membranes, Ionic strength, Nanocellulose, Nanocomposites, Nanofibers, Tensile strength, Barrier properties, Cellulose nanofibrils, Gibbsites, Nano clays, Novel methods, Water resistant, Water-resistances, Wet and dry, Nanocomposite films, Dipping, Film, Ph, Water, nanocomposite, nanofiber, chemistry, water vapor, Steam
National Category
Paper, Pulp and Fiber Technology
Identifiers
urn:nbn:se:kth:diva-326791 (URN)10.1016/j.carbpol.2022.119867 (DOI)000879224600005 ()35989010 (PubMedID)2-s2.0-85135869868 (Scopus ID)
Note

QC 20230515

Available from: 2023-05-15 Created: 2023-05-15 Last updated: 2023-05-15Bibliographically approved
Sethi, J., Liimatainen, H. & Sirvio, J. A. (2021). Fast and Filtration-Free Method to Prepare Lactic Acid-Modified Cellulose Nanopaper. ACS Omega, 6(29), 19038-19044
Open this publication in new window or tab >>Fast and Filtration-Free Method to Prepare Lactic Acid-Modified Cellulose Nanopaper
2021 (English)In: ACS Omega, E-ISSN 2470-1343, Vol. 6, no 29, p. 19038-19044Article in journal (Refereed) Published
Abstract [en]

Dewatering in the preparation of cellulose nano-papers can take up to a few hours, which is a notable bottleneck in the commercialization of nanopapers. As a solution, we report a filtration-free method that is capable of preparing lactic acid-modified cellulose nanopapers within a few minutes. The bleached cellulose nanofibers (CNFs), obtained using a Masuko grinder, were functionalized by sonication-assisted lactic acid modification and centrifuged at 14 000 rpm to achieve a doughlike, concentrated mass. The concentrated CNFs were rolled into a wet sheet and dried in a vacuum drier to obtain nanopapers. The nanopaper preparation time was 10 min, which is significantly faster than the earlier time period reported in the literature (up to a few hours of preparation time). The mechanical properties of nanopaper were comparable to the previous values reported for nanopapers. In addition, the method was successfully used to prepare highly conductive functional nanopapers containing carboxylated multiwalled carbon nanotubes.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2021
National Category
Paper, Pulp and Fiber Technology
Identifiers
urn:nbn:se:kth:diva-299674 (URN)10.1021/acsomega.1c02328 (DOI)000679374200048 ()34337242 (PubMedID)2-s2.0-85111599294 (Scopus ID)
Note

QC 20210819

Available from: 2021-08-19 Created: 2021-08-19 Last updated: 2022-06-25Bibliographically approved
Sethi, J., Afrin, S. & Karim, Z. (2020). Smart polymer coatings for protection from corrosion. In: Smart Polymer Nanocomposites: Biomedical and Environmental Applications (pp. 399-413). Elsevier BV
Open this publication in new window or tab >>Smart polymer coatings for protection from corrosion
2020 (English)In: Smart Polymer Nanocomposites: Biomedical and Environmental Applications, Elsevier BV , 2020, p. 399-413Chapter in book (Other academic)
Abstract [en]

In this chapter, various novel and well-noted approaches for corrosion preventive coatings have been discussed. Very well-documented factors that affect the corrosion mechanism are environmental factors, metal, and surface conditions and are elaborated in detail. Various modern, highly approachable, and currently used coating approaches are expanded and explained. This chapter provides a full view of the modern techniques used for corrosion prevention and cure. 

Place, publisher, year, edition, pages
Elsevier BV, 2020
Keywords
Corrosion, Layer-by-layer coating, Mechanism of coating, Prevention of corrosion, Smart coating
National Category
Corrosion Engineering
Identifiers
urn:nbn:se:kth:diva-313876 (URN)10.1016/B978-0-12-819961-9.00015-3 (DOI)2-s2.0-85125810775 (Scopus ID)
Note

Part of book: ISBN 9780128199619, QC 20220613

Available from: 2022-06-13 Created: 2022-06-13 Last updated: 2022-06-25Bibliographically approved
Görür, Y. C., Francon, H., Sethi, J., Maddalena, L., Montanari, C., Reid, M. S., . . . Wågberg, L.Rapid Processing of Functional Hybrids via Reversible Self-Assembly of Nanocelluloses.
Open this publication in new window or tab >>Rapid Processing of Functional Hybrids via Reversible Self-Assembly of Nanocelluloses
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(English)Manuscript (preprint) (Other academic)
National Category
Paper, Pulp and Fiber Technology
Identifiers
urn:nbn:se:kth:diva-310566 (URN)
Note

QC 20220405

Available from: 2022-04-04 Created: 2022-04-04 Last updated: 2023-03-01Bibliographically approved
Görür, Y. C., Francon, H., Sethi, J., Maddalena, L., Montanari, C., Reid, M. S., . . . Wågberg, L.Rapid processing of functional nanocellulose hybrids for gas barrier, flame retardant and energy storage materials.
Open this publication in new window or tab >>Rapid processing of functional nanocellulose hybrids for gas barrier, flame retardant and energy storage materials
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(English)Manuscript (preprint) (Other academic)
National Category
Materials Chemistry
Identifiers
urn:nbn:se:kth:diva-307200 (URN)
Note

QC 20220119

Available from: 2022-01-17 Created: 2022-01-17 Last updated: 2023-03-01Bibliographically approved
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