Efficient, Self‐Terminating Isolation of Cellulose Nanocrystals through Periodate Oxidation in Pickering Emulsions

ChemSusChem ◽  
2018 ◽  
Vol 11 (20) ◽  
pp. 3581-3585 ◽  
Author(s):  
Peiwen Liu ◽  
Bo Pang ◽  
Lin Tian ◽  
Timmy Schäfer ◽  
Torsten Gutmann ◽  
...  
Keyword(s):  
Cellulose Nanocrystals ◽  
Periodate Oxidation ◽  
Pickering Emulsions

Surface and Interfacial Interactions in Dodecane/Brine Pickering Emulsions Stabilized by the Combination of Cellulose Nanocrystals and Emulsifiers

Langmuir ◽  
2019 ◽  
Vol 35 (37) ◽  
pp. 12061-12070 ◽  
Author(s):  
Sanjiv Parajuli ◽  
Austin L. Dorris ◽  
Chadwick Middleton ◽  
Andres Rodriguez ◽  
Maren O’ Haver ◽  
...  
Keyword(s):  
Cellulose Nanocrystals ◽  
Pickering Emulsions ◽  
Interfacial Interactions

Multibranch Strategy To Decorate Carboxyl Groups on Cellulose Nanocrystals To Prepare Adsorbent/Flocculants and Pickering Emulsions

2019 ◽  
Vol 7 (7) ◽  
pp. 6969-6980 ◽  
Author(s):  
Mei-Li Song ◽  
Hou-Yong Yu ◽  
Lu-Min Chen ◽  
Jia-Ying Zhu ◽  
Yan-Yan Wang ◽  
...  
Keyword(s):  
Cellulose Nanocrystals ◽  
Carboxyl Groups ◽  
Pickering Emulsions

Novel Micro- and Nano-particles Cellulose Based Pickering Emulsions.

2011 ◽  
Vol 1357 ◽  
Author(s):  
Isabelle Capron ◽  
Hervé Bizot ◽  
Solène Grosbois ◽  
Heiko Winter ◽  
Bernard Cathala
Keyword(s):  
Cellulose Nanocrystals ◽  
Colloidal Particles ◽  
Low Cost ◽  
Active Species ◽  
Nano Particles ◽  
Competitive Advantages ◽  
Pickering Emulsions ◽  
Polymeric Particles ◽  
The Stability ◽  
First Time

AbstractEmulsions are usually metastable systems of two non-miscible phases stabilized by surface active species like surfactant molecules. Emulsions stabilized by solid colloidal particles adsorbed at the interface (Pickering emulsions) offer some competitive advantages with respect to classical emulsions. Most studies published up to now concern emulsions stabilized by inorganic (metallic oxides, exfoliated clays, carbonates and phosphates) or polymeric particles while biomass derived alternatives have only been explored to a limited extent. For the first time, we report the stabilization of emulsions by unmodified cellulose nanocrystals [1, 2] . Cellulose nanocrystals were produced from bacterial cellulose and used to form Pickering emulsions. We demonstrate by SEM that the nanocrystals are adsorbed at the oil/water interface. We also study the size distribution of the droplets that was found to range around 4μm in diameter with very narrow dispersity. The stability of the emulsions was also investigated. The fabrication of new armored microparticles exposing cellulose acicular nanocrystals from cellulose nanocrystals opens opportunities to build materials from low cost and environmental friendly resource.

scholarly journals Some modification of cellulose nanocrystals for functional Pickering emulsions

2016 ◽  
Vol 374 (2072) ◽  
pp. 20150139 ◽  
Author(s):  
Dorra Saidane ◽  
Emilie Perrin ◽  
Fanch Cherhal ◽  
Florian Guellec ◽  
Isabelle Capron
Keyword(s):  
Charge Density ◽  
Surface Charge ◽  
Cellulose Nanocrystals ◽  
Surface Charge Density ◽  
Colloidal Particles ◽  
Hydroxyl Groups ◽  
Layer By Layer ◽  
Pickering Emulsions ◽  
Simple Method ◽  
Oil Emulsions

Cellulose nanocrystals (CNCs) are negatively charged colloidal particles well known to form highly stable surfactant-free Pickering emulsions. These particles can vary in surface charge density depending on their preparation by acid hydrolysis or applying post-treatments. CNCs with three different surface charge densities were prepared corresponding to 0.08, 0.16 and 0.64 e nm −2 , respectively. Post-treatment might also increase the surface charge density. The well-known TEMPO-mediated oxidation substitutes C 6 -hydroxyl groups by C 6 -carboxyl groups on the surface. We report that these different modified CNCs lead to stable oil-in-water emulsions. TEMPO-oxidized CNC might be the basis of further modifications. It is shown that they can, for example, lead to hydrophobic CNCs with a simple method using quaternary ammonium salts that allow producing inverse water-in-oil emulsions. Different from CNC modification before emulsification, modification can be carried out on the droplets after emulsification. This way allows preparing functional capsules according to the layer-by-layer process. As a result, it is demonstrated here the large range of use of these biobased rod-like nanoparticles, extending therefore their potential use to highly sophisticated formulations. This article is part of the themed issue ‘Soft interfacial materials: from fundamentals to formulation’.

Synthesis of surfactant-free micro- and nanolatexes from Pickering emulsions stabilized by acetylated cellulose nanocrystals

2017 ◽  
Vol 8 (39) ◽  
pp. 6064-6072 ◽  
Author(s):  
A. Werner ◽  
V. Schmitt ◽  
G. Sèbe ◽  
V. Héroguez
Keyword(s):  
Cellulose Nanocrystals ◽  
Pickering Emulsions

Surfactant-free micro- and nanolatexes from Pickering emulsions stabilized by acetylated cellulose nanocrystals (CNCs).

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