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Bleached and unbleached MFC nanobarriers:: Properties and hydrophobisation with hexamethyldisilazane
RISE, Innventia, PFI – Paper and Fiber Research Institute.ORCID iD: 0000-0002-6183-2017
Kazan National Research Technological University, Russia.
Kazan National Research Technological University, Russia.
RISE, Innventia, PFI – Paper and Fiber Research Institute.
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2012 (English)In: Journal of nanoparticle research, ISSN 1388-0764, E-ISSN 1572-896X, Vol. 14, no 12, article id 1280Article in journal (Refereed) Published
Abstract [en]

This study explores the production and surface modification of microfibrillated cellulose (MFC), based on unbleached and bleached Pinus radiata pulp fibres. Unbleached Pinus radiata pulp fibres tend to fibrillate easier by homogenisation without pre-treatment, compared to the corresponding bleached MFC. The resulting unbleached MFC films have higher barrier against oxygen, lower water wettability and higher tensile strength than the corresponding bleached MFC qualities. In addition, it is demonstrated that carboxymethylation can also be applied for production of highly fibrillated unbleached MFC. The nanofibril size distribution of the carboxymethylated MFC is narrow with diameters less than 20 nm, as quantified on high-resolution field-emission scanning electron microscopy images. The carboxymetylation had a larger fibrillation effect on the bleached pulp fibres than on the unbleached one. Importantly, the suitability of hexamethyldisilazane (HMDS) as a new alternative for rendering MFC films hydrophobic was demonstrated. TheHMDS-modifiedfilmsmade of carboxymethylated MFC had oxygen permeability levels better than 0.06 mL mm m-2 day-1 atm-1,which is a good property for some packaging applications.

Place, publisher, year, edition, pages
2012. Vol. 14, no 12, article id 1280
Keywords [en]
Barriers, Cellulose, Characterisation, Films, Nanoparticles, Polymers, Porous materials, Surface modification
National Category
Nano Technology Other Materials Engineering
Identifiers
URN: urn:nbn:se:ri:diva-9603DOI: 10.1007/s11051-012-1280-zScopus ID: 2-s2.0-84868333035OAI: oai:DiVA.org:ri-9603DiVA, id: diva2:968356
Available from: 2016-09-12 Created: 2016-09-12 Last updated: 2023-05-17Bibliographically approved

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Chinga-Carrasco, Gary

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