High-Strength Nanocellulose-Talc Hybrid Barrier Films
2013 (English)In: ACS Applied Materials and Interfaces, ISSN 1944-8244, Vol. 5, no 24, 13412-13418 p.Article in journal (Refereed) Published
Hybrid organic inorganic films mimicking natural nacre-like composite structures were fabricated from cellulose nanofibers obtained from sequential periodate chlorite oxidation treatment and talc platelets, using a simple vacuum-filtration method. As a pretreatment, commercial talc aggregates were individualized into well-dispersed talc platelets using a wet stirred media mill with high-shear conditions to promote the homogeneity and mechanical characteristics of hybrids. The nanofiber talc hybrids, which had talc contents from 1 to 50 wt %, were all flexible in bending, and possessed tensile strength and Young's modulus values up to 211 +/- 3 MPa and 12 +/- 1 GPa, respectively, the values being remarkably higher than those reported previously for nanofibrillated cellulose talc films. Because of the lamellar and well-organized structure of hybrids in which the talc platelets were evenly embedded, they possessed a small pore size and good oxygen barrier properties, as indicated by the preliminary results. The talc platelets decreased the moisture adsorption of highly talc-loaded hybrids, although they still exhibited hydrophilic surface characteristics in terms of contact angles.
Place, publisher, year, edition, pages
2013. Vol. 5, no 24, 13412-13418 p.
nanocomposite, nanofibrillated cellulose, nanopaper, mineral, talc
Other Chemistry Topics
IdentifiersURN: urn:nbn:se:kth:diva-140673DOI: 10.1021/am4043273ISI: 000329137400083ScopusID: 2-s2.0-84891469893OAI: oai:DiVA.org:kth-140673DiVA: diva2:692251
QC 201401302014-01-302014-01-302014-01-30Bibliographically approved