Please use this identifier to cite or link to this item:
Title: Assessment of the Performance of Cationic Cellulose Derivatives as Calcium Carbonate Flocculant for Papermaking
Authors: Pedrosa, Jorge F. S. 
Alves, Luís
Neto, Carlos P.
Rasteiro, Maria G. 
Ferreira, Paulo J. T. 
Keywords: calcium carbonate; cationic cellulose; fibrillated cellulose; flocculation; laser diffraction spectrometry; quaternary ammonium
Issue Date: 2022
Project: info:eu-repo/grantAgreement/POCI-01-0247-FEDER-021874 
info:eu-repo/grantAgreement/FCTUIDB/00102/ 2020 
info:eu-repo/grantAgreement/ ToxApp4NanoCELFI/| PTDC/SAU-PUB/32587/2017 
Serial title, monograph or event: Polymers
Volume: 14
Issue: 16
Abstract: Cationic polyacrylamides (CPAMs) are usually used as filler retention agents in papermaking formulations. However, increasing environmental restrictions and their non-renewable origin have driven research into bio-based alternatives. In this context, cationic lignocellulosic derivatives have been attracting considerable research interest as a potential substitute. In this work, distinct cationic celluloses with degrees of substitution of between 0.02 and 1.06 and with distinct morphological properties were synthesized via the cationization of bleached eucalyptus kraft pulp, using a direct cationization with (3-chloro-2-hydroxypropyl) trimethylammonium chloride (CHPTAC) or a two-step cationization, where the cellulose was first oxidized to form dialdehyde cellulose and was then made to react with Girard’s reagent T (GT). Fibrillated samples were produced by subjecting some samples to a high-pressure homogenization treatment. The obtained samples were evaluated regarding their potential to flocculate and retain precipitated calcium carbonate (PCC), and their performance was compared to that of a commercial CPAM. The cationic fibrillated celluloses, with a degree of substitution of ca. 0.13–0.16, exhibited the highest flocculation performance of all the cationic celluloses and were able to increase the filler retention from 43% (with no retention agent) to ca. 61–62% (with the addition of 20 mg/g of PCC). Although it was not possible to achieve the performance of CPAM (filler retention of 73% with an addition of 1 mg/g of PCC), the results demonstrated the potential of cationic cellulose derivatives for use as bio-based retention agents.
ISSN: 2073-4360
DOI: 10.3390/polym14163309
Rights: openAccess
Appears in Collections:FCTUC Eng.Química - Artigos em Revistas Internacionais
I&D CIEPQPF - Artigos em Revistas Internacionais

Show full item record

Google ScholarTM




This item is licensed under a Creative Commons License Creative Commons