TY - JOUR
T1 - Electroacoustic characterization of conventional and electrosterically stabilized nanocrystalline celluloses
AU - Safari, Salman
AU - Sheikhi, Amir
AU - van de Ven, Theo G.M.
N1 - Funding Information:
We thank Prof. Reghan J. Hill (Department of Chemical Engineering, McGill University) for his comments on soft particles and the use of the Acoustosizer II in his laboratory. We are grateful to Prof. Nathalie Tufenkji (Department of Chemical Engineering, McGill University) for the use of the Zetasizer. We thank Han Yang and Louis Godbout (Department of Chemistry, McGill University) for providing ENCC and NCC particles, respectively. Financial support from an Industrial Research Chair funded by FPInnovations and NSERC , from NSERC’s Innovative Green Wood Fibre Products Network, and from a McGill Engineering Doctoral Award (MEDA) are gratefully acknowledged.
PY - 2014/10/15
Y1 - 2014/10/15
N2 - Nanoparticles are widely used as drug carriers, texturizing agents, fat replacers, and reinforcing inclusions. Because of a growing interest in non-renewable materials, much research has focused on nanocellulose derivatives, which are biodegradable, biocompatible, and easily synthesized. Among nanocellulose derivatives, nanocrystalline cellulose (NCC) has been known for half a century, but its utility is limited because its colloidal stability is challenged by added salt. On the other hand, electrosterically stabilized nanocrystalline cellulose (ENCC) has recently been observed to have superior colloidal stability. Here, we use electrokinetic-sonic-amplitude (ESA) and acoustic attenuation spectroscopy to assess NCC and ENCC ζ-potentials and sizes over wide ranges of pH and ionic strength. The results attest to a soft, porous layer of dicarboxylic cellulose (DCC) polymers that expands and collapses with ionic strength, electrosterically stabilizing ENCC dispersions at ionic strengths up to at least 200mmol L-1.
AB - Nanoparticles are widely used as drug carriers, texturizing agents, fat replacers, and reinforcing inclusions. Because of a growing interest in non-renewable materials, much research has focused on nanocellulose derivatives, which are biodegradable, biocompatible, and easily synthesized. Among nanocellulose derivatives, nanocrystalline cellulose (NCC) has been known for half a century, but its utility is limited because its colloidal stability is challenged by added salt. On the other hand, electrosterically stabilized nanocrystalline cellulose (ENCC) has recently been observed to have superior colloidal stability. Here, we use electrokinetic-sonic-amplitude (ESA) and acoustic attenuation spectroscopy to assess NCC and ENCC ζ-potentials and sizes over wide ranges of pH and ionic strength. The results attest to a soft, porous layer of dicarboxylic cellulose (DCC) polymers that expands and collapses with ionic strength, electrosterically stabilizing ENCC dispersions at ionic strengths up to at least 200mmol L-1.
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U2 - 10.1016/j.jcis.2014.06.061
DO - 10.1016/j.jcis.2014.06.061
M3 - Article
AN - SCOPUS:84905220805
SN - 0021-9797
VL - 432
SP - 151
EP - 157
JO - Journal of Colloid And Interface Science
JF - Journal of Colloid And Interface Science
ER -
