Micro Nanofibrillated Cellulose as Functional Additive Supporting Processability of Surface-Active Mineral Suspensions: Exemplified by Pixel Coating of an NOx-Sorbent Layer

dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorDimic-Misic, Katarinaen_US
dc.contributor.authorImani, Monirehen_US
dc.contributor.authorBarac, Nemanjaen_US
dc.contributor.authorJanackovic, Djordjeen_US
dc.contributor.authorUskokovic, Petaren_US
dc.contributor.authorBarcelo, Ernesten_US
dc.contributor.authorGane, Patricken_US
dc.contributor.departmentDepartment of Bioproducts and Biosystemsen
dc.contributor.departmentSchool common, CHEMen
dc.contributor.groupauthorBiopolymer Chemistry and Engineeringen
dc.contributor.organizationUniversity of Belgradeen_US
dc.date.accessioned2023-03-22T07:53:22Z
dc.date.available2023-03-22T07:53:22Z
dc.date.issued2023-02en_US
dc.descriptionFunding Information: The work was supported by Omya International AG, Switzerland, Group Sustainability. Acknowledgments: We express gratitude for technical discussion from Michael Hummel, Aalto University, regarding the CaBER extensional characteristics. Publisher Copyright: © 2023 by the authors.
dc.description.abstractUnlike established coating formulations, functional particulate coatings often demand the omission of polymer dispersant so as to retain surface functionality. This results in heterogeneous complex rheology. We take an example from a novel development for an NOx mitigation surface flow filter system, in which ground calcium carbonate (GCC), applied in a coating, reacts with NO2 releasing CO2. Inclusion of mesoporous ancillary mineral acts to capture the CO2. The coating is applied as droplets to maximize gas-contact dynamic by forming a pixelated 2D array using a coating device consisting of protruding pins, which are loaded by submersion in the aqueous coating color such that the adhering droplets are transferred onto the substrate. The flow is driven by surface meniscus wetting causing lateral spread and bulk pore permeation. Filamentation occurs during the retraction of the pins. Stress-related viscoelastic and induced dilatancy in the suspension containing the ancillary mesoporous mineral disrupts processability. Adopting shear, oscillation and extensional rheometric methods, we show that the inclusion of an ancillary mineral that alone absorbs water, e.g., perlite (a naturally occurring porous volcanic glass), is rheologically preferable to one that in addition to absorbing water also immobilizes it on the mineral surface, e.g., sepiolite. When including micro-nanofibrillated cellulose (MNFC), critical for maintaining moisture to support NO2 sorption, it is observed that it acts also as a flow modifier, enabling uniform coating transfer to be achieved, thus eliminating any possible detrimental effect on mineral surface activity by avoiding the use of soluble polymeric dispersant.en
dc.description.versionPeer revieweden
dc.format.extent27
dc.format.mimetypeapplication/pdfen_US
dc.identifier.citationDimic-Misic, K, Imani, M, Barac, N, Janackovic, D, Uskokovic, P, Barcelo, E & Gane, P 2023, ' Micro Nanofibrillated Cellulose as Functional Additive Supporting Processability of Surface-Active Mineral Suspensions: Exemplified by Pixel Coating of an NOx-Sorbent Layer ', Materials, vol. 16, no. 4, 1598 . https://doi.org/10.3390/ma16041598en
dc.identifier.doi10.3390/ma16041598en_US
dc.identifier.issn1996-1944
dc.identifier.otherPURE UUID: 49b35584-9900-4b39-8066-6ce661490248en_US
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/49b35584-9900-4b39-8066-6ce661490248en_US
dc.identifier.otherPURE LINK: http://www.scopus.com/inward/record.url?scp=85149215615&partnerID=8YFLogxKen_US
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/103250987/materials_16_01598_v2.pdfen_US
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/120157
dc.identifier.urnURN:NBN:fi:aalto-202303222482
dc.language.isoenen
dc.publisherMDPI AG
dc.relation.ispartofseriesMaterialsen
dc.relation.ispartofseriesVolume 16, issue 4en
dc.rightsopenAccessen
dc.subject.keywordmicro nanofibrillated cellulose (MNFC)en_US
dc.subject.keywordpixelated coatingen_US
dc.subject.keywordrheology of undispersed mineral suspensionsen_US
dc.subject.keywordsurface flow filtrationen_US
dc.titleMicro Nanofibrillated Cellulose as Functional Additive Supporting Processability of Surface-Active Mineral Suspensions: Exemplified by Pixel Coating of an NOx-Sorbent Layeren
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
dc.type.versionpublishedVersion
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