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Production of cellulose micro/nanofibrils with sodium silicate: impact on energy consumption, microstructure, crystallinity and stability of suspensions: Impact of Na2SiO3 on the properties of cellulose micro/nanofibrils.
- Source :
- Nordic Pulp & Paper Research Journal; Dec2022, Vol. 37 Issue 4, p686-701, 16p
- Publication Year :
- 2022
-
Abstract
- Pre-treatments reduce energy consumption for the production of cellulose micro/nanofibrils (MFC/CNF). The objective of this work was to study sodium silicate (Na<subscript>2</subscript>SiO<subscript>3</subscript>) solutions as pre-treatment for Eucalyptus sp. and Pinus sp. pulps. The treatments were identified as EUC SS 5 % and EUC SS 10 % when 5 and 10 % Na<subscript>2</subscript>SiO<subscript>3</subscript> were used, respectively. The treatments for Pinus sp. pulp were identified as PIN SS 5 % and PIN SS 10 %, and the untreated pulps as EUC control and PIN control. The lowest hemicellulose content was obtained for PIN SS 10 %. EUC SS 10 % showed the highest WRV values. EUC SS 5 % (∼ 4100 kWh/t) and EUC SS 10 % (∼ 4200 kWh/t) showed the lowest energy consumption. The pre-treated MFC/CNF showed diameters below 45 nm. The lowest viscosity was obtained for EUC SS 5 % (5.5 cP) and the highest for PIN control (7.7 cP), respectively. The zeta potential indicated moderate stability of the suspensions (−24 ∼ −18 mV). Na<subscript>2</subscript>SiO<subscript>3</subscript> showed efficiency for MFC/CNF production due to reduced energy consumption and better individualization. The suspensions have compatible characteristics for application as a stabilizer of colloidal systems and reinforcement of composites. [ABSTRACT FROM AUTHOR]
- Subjects :
- ENERGY consumption
SOLUBLE glass
CELLULOSE
COLLOIDS
CRYSTALLINITY
CELLULOSE fibers
Subjects
Details
- Language :
- English
- ISSN :
- 02832631
- Volume :
- 37
- Issue :
- 4
- Database :
- Complementary Index
- Journal :
- Nordic Pulp & Paper Research Journal
- Publication Type :
- Academic Journal
- Accession number :
- 160425945
- Full Text :
- https://doi.org/10.1515/npprj-2022-0052