Multifunctional Nanoclay Hybrids of High Toughness, Thermal, and Barrier Performances
2013 (English)In: ACS Applied Materials and Interfaces, ISSN 1944-8244, Vol. 5, no 15, 7613-7620 p.Article in journal (Refereed) Published
To address brittleness of nanoclay hybrids of high inorganic content, ductile polymers (polyethylene oxide and hydroxyethyl cellulose) and montmorillonite (MTM) have been assembled into hybrid films using a water-based filtration process. Nacre-mimetic layered films resulted and were characterized by FE-SEM and XRD. Mechanical properties at ambient condition were studied by tensile test, while performance at elevated temperature and moisture conditions were evaluated by TGA, dynamic vapor sorption, and dynamic thermomechanical and hygromechanical analyses. Antiflammability and barrier properties against oxygen and water vapor were also investigated. Despite their high MTM content in the 60-85 wt % range, the hybrids exhibit remarkable ductility and a storage modulus above 2 GPa even in severe conditions (300 degrees C or 94% RH). Moreover, they present fire-shielding property and are amongst the best oxygen and water vapor barrier hybrids reported in the literature. This study thus demonstrates nanostructure property advantages for synergistic effects in hybrids combining inexpensive, available, and environmentally benign constituents.
Place, publisher, year, edition, pages
2013. Vol. 5, no 15, 7613-7620 p.
hybrids, montmorillonite, nacre, ductile, gas barrier
IdentifiersURN: urn:nbn:se:kth:diva-128475DOI: 10.1021/am401928dISI: 000323241100114ScopusID: 2-s2.0-84882742859OAI: oai:DiVA.org:kth-128475DiVA: diva2:647870
QC 201309122013-09-122013-09-122013-09-12Bibliographically approved