TY - JOUR
T1 - The chemical-free production of nanocelluloses from microcrystalline cellulose and their use as Pickering emulsion stabilizer
AU - Buffiere, Jean
AU - Balogh-Michels, Zoltan
AU - Borrega, Marc
AU - Geiger, Thomas
AU - Zimmermann, Tanja
AU - Sixta, Herbert
N1 - Publisher Copyright:
© 2017
PY - 2017/12/15
Y1 - 2017/12/15
N2 - This paper takes a comparative approach in characterizing
two types of nano-scale cellulosic particles obtained
using chemical-free pathways, either by nearcritical
water treatment or by high-shear homogenization from the
same microcrystalline cellulose (MCC). The nearcritical
water treatment efficiently depolymerized cellulose,
producing a solid precipitated fraction of
low-molecular-weight material containing cellulose II,
while homogenization mechanically deconstructed MCC
without altering its molecular structure. Both pathways
yielded nanocellulose-like materials yet with different
morphologies. The mechanically produced, rod-like
particles were obtained with high yield. In contrast, the
hydrothermal precipitate exhibited more hydrophobic
ribbon-like particles that provided a greater level of
particle-particle interaction. Both materials
successfully acted as stabilizers for oil-in-water
Pickering emulsions; however, the hydrothermally-produced
material exhibited superior performance, with stable
emulsions obtained upon addition of as low as 1.0 wt.%
cellulose. These two pathways are highly relevant for
altering the structure and properties of MCC and for
formulating new, sustainably produced nanocellulose-based
materials.
AB - This paper takes a comparative approach in characterizing
two types of nano-scale cellulosic particles obtained
using chemical-free pathways, either by nearcritical
water treatment or by high-shear homogenization from the
same microcrystalline cellulose (MCC). The nearcritical
water treatment efficiently depolymerized cellulose,
producing a solid precipitated fraction of
low-molecular-weight material containing cellulose II,
while homogenization mechanically deconstructed MCC
without altering its molecular structure. Both pathways
yielded nanocellulose-like materials yet with different
morphologies. The mechanically produced, rod-like
particles were obtained with high yield. In contrast, the
hydrothermal precipitate exhibited more hydrophobic
ribbon-like particles that provided a greater level of
particle-particle interaction. Both materials
successfully acted as stabilizers for oil-in-water
Pickering emulsions; however, the hydrothermally-produced
material exhibited superior performance, with stable
emulsions obtained upon addition of as low as 1.0 wt.%
cellulose. These two pathways are highly relevant for
altering the structure and properties of MCC and for
formulating new, sustainably produced nanocellulose-based
materials.
KW - microcrystalline cellulose
KW - microfluidization
KW - nanocellulose
KW - nearcritical water
KW - pickering emulsions
UR - http://www.scopus.com/inward/record.url?scp=85029348749&partnerID=8YFLogxK
U2 - 10.1016/j.carbpol.2017.09.028
DO - 10.1016/j.carbpol.2017.09.028
M3 - Article
SN - 0144-8617
VL - 178
SP - 48
EP - 56
JO - Carbohydrate Polymers
JF - Carbohydrate Polymers
ER -