Hard and transparent films formed by nanocellulose-TiO2 nanoparticle hybrids
Schütz, Christina (Stockholms universitet. Department of Materials and Environmental Chemistry)
Sort Viñas, Jordi (Institució Catalana de Recerca i Estudis Avançats)
Bacsik, Zoltán (Stockholms universitet. Department of Materials and Environmental Chemistry)
Oliynik, Vitaliy (Stockholms universitet. Department of Materials and Environmental Chemistry)
Pellicer Vilà, Eva Maria (Universitat Autònoma de Barcelona. Departament de Física)
Fall, Andreas (Kungl. Tekniska högskolan. Institutionen för Fiber- och polymerteknologi)
Wagberg, Lars (Wallenberg Wood Science Center)
Berglund, Lars (Wallenberg Wood Science Center)
Bergström, Lennart (Stockholms universitet. Department of Materials and Environmental Chemistry)
Salazar Álvarez, Germán (Stockholms universitet. Department of Materials and Environmental Chemistry)

Date:	2012
Abstract:	T he formation of hybrids of nanofibrillated cellulose and titania nanoparticles in aqueous media has been studied. Their transparency and mechanical behavior have been assessed by spectrophotometry and nanoindentation. The results show that limiting the titania nanoparticle concentration below 16 vol% yields homogeneous hybrids with a very high Young's modulus and hardness, of up to 44 GPa and 3. 4 GPa, respectively, and an optical transmittance above 80%. Electron microscopy shows that higher nanoparticle contents result in agglomeration and an inhomogeneous hybrid nanostructure with a concomitant reduction of hardness and optical transmittance. Infrared spectroscopy suggests that the nanostructure of the hybrids is controlled by electrostatic adsorption of the titania nanoparticles on the negatively charged nanocellulose surfaces.
Grants:	Ministerio de Ciencia e Innovación MAT2011-27380-C02-01
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; Versió publicada
Subject:	Pel·lícules fines ; Nanopartícules
Published in:	PloS one, Vol. 7, N. 10 (2012) , p. e45828, ISSN 1932-6203

DOI: 10.1371/journal.pone.0045828
PMID: 23049689

8 p, 2.3 MB

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Group of Smart Nanoengineered Materials, Nanomechanics and Nanomagnetism (Gnm3)
Articles > Published articles