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Toward Sustainable Multifunctional Coatings Containing Nanocellulose in a Hybrid Glass Matrix
Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA..ORCID iD: 0000-0001-7870-6327
Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA..
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology.ORCID iD: 0000-0001-5818-2378
Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA..
2018 (English)In: ACS Nano, ISSN 1936-0851, E-ISSN 1936-086X, Vol. 12, no 6, p. 5495-5503Article in journal (Refereed) Published
Abstract [en]

We report on a sustainable route to protective nanocomposite coatings, where one of the components, nanocellulose fibrils, is derived from trees and the glass matrix is an inexpensive sol-gel organic-inorganic hybrid of zirconium alkoxide and an epoxy-functionalized silane. The hydrophilic nature of the colloidal nanocellulose fibrils is exploited to obtain a homogeneous one-pot suspension of the nanocellulose in the aqueous sol-gel matrix precursors solution. The mixture is then sprayed to form nano composite coatings of a well-dispersed, random in-plane nano cellulose fibril network in a continuous organic inorganic glass matrix phase. The nanocellulose incorporation in the sol-gel matrix resulted in nanostructured composites with marked effects on salient coating properties including optical transmittance, hardness, fracture energy, and water contact angle. The particular role of the nanocellulose fibrils on coating fracture properties, important for coating reliability, was analyzed and discussed in terms of fibril morphology, molecular matrix, and nanocellulose/matrix interactions.

Place, publisher, year, edition, pages
AMER CHEMICAL SOC , 2018. Vol. 12, no 6, p. 5495-5503
Keywords [en]
cellulose nanofibril (CNF), cellulose nanocrystal (CNC), sol-gel, spray deposition, fracture energy, inorganic precursors, flexible
National Category
Composite Science and Engineering
Identifiers
URN: urn:nbn:se:kth:diva-232261DOI: 10.1021/acsnano.8b01057ISI: 000436910200046PubMedID: 29882658Scopus ID: 2-s2.0-85049065940OAI: oai:DiVA.org:kth-232261DiVA, id: diva2:1233539
Note

QC 20180718

Available from: 2018-07-18 Created: 2018-07-18 Last updated: 2018-07-18Bibliographically approved

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Berglund, Lars

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