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Nanomaterials 2012, 2(3), 286-297; doi:10.3390/nano2030286
Article

Influence of High Shear Dispersion on the Production of Cellulose Nanofibers by Ultrasound-Assisted TEMPO-Oxidation of Kraft Pulp

1,* , 1
 and 1,2
Received: 17 July 2012; in revised form: 23 August 2012 / Accepted: 27 August 2012 / Published: 10 September 2012
(This article belongs to the Special Issue Composite Nanomaterials)
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Abstract: Cellulose nanofibers can be produced using a combination of TEMPO, sodium bromide (NaBr) and sodium hypochlorite, and mechanical dispersion. Recently, this process has been the subject of intensive investigation. However, studies on the aspects of mechanical treatment of this process remain marginal. The main objective of this study is to evaluate the high shear dispersion parameters (e.g., consistency, stator-rotor gap, recirculation rate and pH) and determine their influences on nanocellulose production using ultrasound-assisted TEMPO-oxidation of Kraft pulp. All nanofiber gels produced in this study exhibited rheological behaviors known as shear thinning. From all the dispersion parameters, the following conditions were identified as optimal: 0.042 mm stator-rotor gap, 200 mL/min recycle rate, dispersion pH of 7 and a feed consistency of 2%. High quality cellulose gel could be produced under these conditions. This finding is surely of great interest for the pulp and paper industry.
Keywords: Kraft pulp; ultrasound; TEMPO-oxidation; nanocellulose; consistency; high-shear dispersion; stator-rotor gap; recirculation rate; pH; rheological behavior Kraft pulp; ultrasound; TEMPO-oxidation; nanocellulose; consistency; high-shear dispersion; stator-rotor gap; recirculation rate; pH; rheological behavior
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Loranger, E.; Piché, A.-O.; Daneault, C. Influence of High Shear Dispersion on the Production of Cellulose Nanofibers by Ultrasound-Assisted TEMPO-Oxidation of Kraft Pulp. Nanomaterials 2012, 2, 286-297.

AMA Style

Loranger E, Piché A-O, Daneault C. Influence of High Shear Dispersion on the Production of Cellulose Nanofibers by Ultrasound-Assisted TEMPO-Oxidation of Kraft Pulp. Nanomaterials. 2012; 2(3):286-297.

Chicago/Turabian Style

Loranger, Eric; Piché, André-Olivier; Daneault, Claude. 2012. "Influence of High Shear Dispersion on the Production of Cellulose Nanofibers by Ultrasound-Assisted TEMPO-Oxidation of Kraft Pulp." Nanomaterials 2, no. 3: 286-297.


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