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- Title
Production of cellulose micro/nanofibrils with sodium silicate: impact on energy consumption, microstructure, crystallinity and stability of suspensions: Impact of Na<sub>2</sub>SiO<sub>3</sub> on the properties of cellulose micro/nanofibrils.
- Authors
Mascarenhas, Adriano Reis Prazeres; Scatolino, Mário Vanoli; Dias, Matheus Cordazzo; Martins, Maria Alice; Mendonça, Maressa Carvalho; de Melo, Rafael Rodolfo; Damasio, Renato Augusto Pereira; Tonoli, Gustavo Henrique Denzin
- 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 (Na2SiO3) 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 % Na2SiO3 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). Na2SiO3 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.
- Subjects
ENERGY consumption; SOLUBLE glass; CELLULOSE; COLLOIDS; CRYSTALLINITY; CELLULOSE fibers
- Publication
Nordic Pulp & Paper Research Journal, 2022, Vol 37, Issue 4, p686
- ISSN
0283-2631
- Publication type
Article
- DOI
10.1515/npprj-2022-0052