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Super Gas Barrier and Fire Resistance of Nanoplatelet/Nanofibril Multilayer Thin Films
3123 TAMU, Dept Mat Sci & Engn, College Stn, TX 77843 USA..
KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Fiber- och polymerteknologi.ORCID-id: 0000-0003-4108-2279
3123 TAMU, Dept Chem, College Stn, TX 77843 USA..
KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Fiber- och polymerteknologi.ORCID-id: 0000-0001-9856-6536
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2019 (engelsk)Inngår i: Advanced Materials Interfaces, ISSN 2196-7350, Vol. 6, nr 2, artikkel-id 1801424Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Cellulose nanofibrils (CNF) are abundant in the fiber cell walls of many plants and are considered a nearly inexhaustible resource. With the goal of improving the flame resistance and gas barrier properties of cellulose-based films, cationic CNF are assembled with anionic vermiculite (VMT) clay using the layer-by-layer deposition process. The highly aligned VMT nanoplatelets, together with cellulose nanofibrils, form a nanobrick wall structure that exhibits high optical transparency, flame resistance, super oxygen barrier, and high modulus. A 20 CNF/VMT bilayer (BL) nanocoating, with a thickness of only 136 nm, exhibits an oxygen transmission rate of 0.013 cc (m(2) day atm)(-1). With only 2 BL of CNF/VMT, the melting of flexible polyurethane foam exposed to a butane torch is prevented. These nanocoatings also exhibit a high elastic modulus (20 GPa) and hardness (1 GPa). This study demonstrates a unique, renewable, cellulose-based nanocoating that could be used in a variety of packaging and protection applications.

sted, utgiver, år, opplag, sider
WILEY , 2019. Vol. 6, nr 2, artikkel-id 1801424
Emneord [en]
cellulose nanofibril, flame resistance, layer-by-layer assembly, mechanical properties, oxygen barrier
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Identifikatorer
URN: urn:nbn:se:kth:diva-243958DOI: 10.1002/admi.201801424ISI: 000456673900011Scopus ID: 2-s2.0-85056621866OAI: oai:DiVA.org:kth-243958DiVA, id: diva2:1293033
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QC 20190301

Tilgjengelig fra: 2019-03-01 Laget: 2019-03-01 Sist oppdatert: 2019-03-01bibliografisk kontrollert

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Ghanadpour, MaryamKöklükaya, OruçWågberg, Lars

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