Direct measurements of non-ionic attraction and nanoscaled lubrication in biomimetic composites from nanofibrillated cellulose and modified carboxymethylated cellulose

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Olszewska, Anna
dc.contributor.author Valle-Delgado, Juan José
dc.contributor.author Nikinmaa, Miika
dc.contributor.author Laine, Janne
dc.contributor.author Österberg, Monika
dc.date.accessioned 2017-05-11T07:35:51Z
dc.date.available 2017-05-11T07:35:51Z
dc.date.issued 2013
dc.identifier.citation Olszewska , A , Valle-Delgado , J J , Nikinmaa , M , Laine , J & Österberg , M 2013 , ' Direct measurements of non-ionic attraction and nanoscaled lubrication in biomimetic composites from nanofibrillated cellulose and modified carboxymethylated cellulose ' NANOSCALE , vol 5 , no. 23 , pp. 11837-11844 . DOI: 10.1039/c3nr03091a en
dc.identifier.issn 2040-3364
dc.identifier.issn 2040-3372
dc.identifier.other PURE UUID: 618d7ae4-44cf-4bed-ac7d-f5d81e39ee3a
dc.identifier.other PURE ITEMURL: https://research.aalto.fi/en/publications/direct-measurements-of-nonionic-attraction-and-nanoscaled-lubrication-in-biomimetic-composites-from-nanofibrillated-cellulose-and-modified-carboxymethylated-cellulose(618d7ae4-44cf-4bed-ac7d-f5d81e39ee3a).html
dc.identifier.other PURE LINK: http://pubs.rsc.org/en/content/articlelanding/2013/nr/c3nr03091a#!divAbstract
dc.identifier.other PURE FILEURL: https://research.aalto.fi/files/6735866/Manuscript_Resubmission.pdf
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/25550
dc.description VK: T10413 50 %; T10402 50 %
dc.description.abstract There is a growing interest to design biomimetic self-assembled composite films from renewable resources aimed at a combination of high toughness, strength and stiffness. However, the relationship between interfacial interactions of the components and the mechanical performance of the composite is still poorly understood. In this work we present evidence of the link between mechanical performance of carbohydrate-based composites with nanolubrication and with direct surface forces between the hard and soft domain in the system. Our approach was to use nanofibrillated cellulose (NFC) as the major reinforcing domain and to modify it by adsorption of a small amount of soft polyethylene glycol grafted carboxymethyl cellulose (CMC-g-PEG). The effect of the soft polymer on direct normal and friction forces in air between cellulose surfaces was evaluated using colloidal probe microscopy. The fibrillar structure of the NFC thin film affected the frictional behaviour; when decreasing load, the friction between pure cellulose surfaces increased, suggesting partial pull-out of fibrils, a phenomenon not observed for non-fibrillar cellulose substrates. Adsorption of CMC-g-PEG on both surfaces decreased the friction considerably but adhesion was still high. The symmetric system, having both cellulose substrates covered with polymer, was compared to asymmetric systems where only one surface was covered with polymer. Furthermore, a free standing composite film was prepared by non-ionic self-assembly of NFC and CMC-g-PEG with 99:1 weight-ratio; the mechanical properties of the macroscopic films were related to the nanoscaled interactions between the components. The composition studied showed excellent mechanical properties which do not follow the simple rule of mixture. Thus, a synergy in the direct surface forces and mechanical properties was found. This approach offers a robust path to aid in the efficient design of next generation biomimetic composites. en
dc.format.extent 8
dc.format.extent 11837-11844
dc.format.mimetype application/pdf
dc.language.iso en en
dc.relation.ispartofseries NANOSCALE en
dc.relation.ispartofseries Volume 5, issue 23 en
dc.rights openAccess en
dc.subject.other 216 Materials engineering en
dc.subject.other 215 Chemical engineering en
dc.title Direct measurements of non-ionic attraction and nanoscaled lubrication in biomimetic composites from nanofibrillated cellulose and modified carboxymethylated cellulose en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department Department of Forest Products Technology
dc.contributor.department Department of Bioproducts and Biosystems en
dc.subject.keyword 216 Materials engineering
dc.subject.keyword 215 Chemical engineering
dc.identifier.urn URN:NBN:fi:aalto-201705113934
dc.identifier.doi 10.1039/c3nr03091a
dc.type.version acceptedVersion


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