Superstable Wet Foams and Lightweight Solid Composites from Nanocellulose and Hydrophobic Particles
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2021-12-28
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en
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10
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ACS Nano, Volume 15, issue 12, pp. 19712–19721
Abstract
Colloids are suitable options to replace surfactants in the formation of multiphase systems while simultaneously achieving performance benefits. We introduce synergetic combination of colloids for the interfacial stabilization of complex fluids that can be converted into lightweight materials. The strong interactions between high aspect ratio and hydrophilic fibrillated cellulose (CNF) with low aspect ratio hydrophobic particles afford superstable Pickering foams. The foams were used as a scaffolding precursor of porous, solid materials. Compared to foams stabilized by the hydrophobic particles alone, the introduction of CNF significantly increased the foamability (by up to 350%) and foam lifetime. These effects are ascribed to the fibrillar network formed by CNF. The CNF solid fraction regulated the interparticle interactions in the wet foam, delaying or preventing drainage, coarsening, and bubble coalescence. Upon drying, such a complex fluid was transformed into lightweight and strong architectures, which displayed properties that depended on the surface energy of the CNF precursor. We show that CNF combined with hydrophobic particles universally forms superstable complex fluids that can be used as a processing route to synthesize strong composites and lightweight structures.Description
| openaire: EC/H2020/788489/EU//BioELCell Funding Information: The authors acknowledge funding support from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program (Grant Agreement No. 788489, “BioElCell”). The Canada Excellence Research Chair (CERC) program is also gratefully acknowledged as well as Canadian Foundation for Innovation (CFI). M.B. acknowledges financial support from the Austrian Science Fund (FWF) (J4356). Publisher Copyright: © 2021 The Authors. Published by American Chemical Society.
Keywords
colloidal foams, interfacial interactions, multiphase, nanocellulose, nanofibril, particle-stabilized foams, stabilization
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Abidnejad, R, Beaumont, M, Tardy, B L, Mattos, B D & Rojas, O J 2021, ' Superstable Wet Foams and Lightweight Solid Composites from Nanocellulose and Hydrophobic Particles ', ACS Nano, vol. 15, no. 12, pp. 19712–19721 . https://doi.org/10.1021/acsnano.1c07084