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Strong and Flexible Nanocomposites of Carboxylated Cellulose Nanofibril Dispersed by Industrial Lignin
KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Centra, Wallenberg Wood Science Center. Stockholm Univ, Dept Mat & Environm Chem, S-10691 Stockholm, Sweden.
2018 (engelsk)Inngår i: ACS Sustainable Chemistry and Engineering, ISSN 2168-0485, Vol. 6, nr 4, s. 5524-5532Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

We demonstrated that industrial lignin can be facilely processed with carboxylated cellulose nanofibril (CNF) to obtain strong, flexible, and transparent nanocomposites via film casting of dispersions. The tensile strength and strain to failure of lignin-CNF nanocomposites (245 MPa and 15%, respectively at 7.7 wt % of lignin) are superior to previously reported polymer/nanoparticle-CNF composites with polymer contents below SO wt %, such as poly(vinyl alcohol)CNF films and even reduced graphene oxide-CNF films. The excellent mechanical properties of lignin-CNF nanocomposite films are related to the lignin-enhanced colloidal stability and dispersity of CNF in aqueous dispersions supported by measurements of rheology and dynamic light scattering, which accordingly suppresses the excess fibril aggregates during film formation. Moreover, lignin in the nanocomposites benefits an efficient functionalization of gold/iron oxide nanoparticles on the surface of nanocomposites. This study illustrates the great potential of industrial lignin in developing nanocellulose-based materials with advanced properties and functionalities.

sted, utgiver, år, opplag, sider
American Chemical Society (ACS), 2018. Vol. 6, nr 4, s. 5524-5532
Emneord [en]
nanocellulose, lignin, high strength, flexibility, multifunctionalities
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-226782DOI: 10.1021/acssuschemeng.8b00402ISI: 000429285800118Scopus ID: 2-s2.0-85044831569OAI: oai:DiVA.org:kth-226782DiVA, id: diva2:1204347
Merknad

QC 20180507

Tilgjengelig fra: 2018-05-07 Laget: 2018-05-07 Sist oppdatert: 2018-05-07bibliografisk kontrollert

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