Synthesis of Lignosulfonate-Based Dispersants for Application in Concrete Formulations.

Publisher: MDPI Country of Publication: Switzerland NLM ID: 101555929 Publication Model: Electronic Cited Medium: Print ISSN: 1996-1944 (Print) Linking ISSN: 19961944 NLM ISO Abbreviation: Materials (Basel) Subsets: PubMed not MEDLINE

Publication: May 2010- : Basel, Switzerland : MDPI
Original Publication: Basel, Switzerland : Molecular Diversity Preservation International, 2008-2010.

Lignosulfonates (LS) are products from the sulfite pulping process that could be applied as renewable environmentally-friendly polymeric surfactants. Being widely used as plasticizers and water-reducing admixtures in concrete formulations LS compete in the market with petroleum-based superplasticizers, such as naphthalene sulfonate formaldehyde polycondensate (NSF) and copolymer polycarboxylate ethers (PCE). In this work, different chemical modification strategies were used to improve LS performance as dispersants for concrete formulations. One strategy consisted in increasing the molecular weight of LS through different approaches, such as laccase and polyoxometalate-mediated polymerization, glyoxalation, and reversible addition-fragmentation chain transfer (RAFT) polymerization. The other strategy consisted of preparing LS-based non-ionic polymeric dispersants using two different epoxidized oligomer derivatives of poly(ethylene glycol) (PEG) and poly(propylene glycol) (PPG). Modified LS were used to prepare cement pastes, which were examined for their fluidity. Results revealed that the most promising products are PPG-modified LS due to the introduction of PPG chains by reaction with phenolic moieties in LS. The enhanced dispersant efficiency of the ensuing products is probably related not only to electrostatic repulsion caused by the sulfonic ionizable groups in LS but also to steric hindrance phenomena due to the grafted bulky PPG chains.

Appl Microbiol Biotechnol. 2004 Nov;66(1):1-9. (PMID: 15459798)
Appl Microbiol Biotechnol. 2011 Feb;89(4):981-7. (PMID: 20953600)
J Colloid Interface Sci. 2016 Mar 15;466:91-100. (PMID: 26707776)
Prikl Biokhim Mikrobiol. 2007 Sep-Oct;43(5):583-97. (PMID: 18038679)
Nat Chem. 2009 Jul;1(4):276-88. (PMID: 21378870)
Langmuir. 2014 Aug 12;30(31):9303-12. (PMID: 25046477)
J Agric Food Chem. 2001 Sep;49(9):4252-61. (PMID: 11559119)
J Colloid Interface Sci. 2004 Nov 1;279(1):36-45. (PMID: 15380409)
Polymers (Basel). 2018 Jun 16;10(6):. (PMID: 30966704)
FEBS Lett. 1990 Jul 2;267(1):99-102. (PMID: 2365094)
Magn Reson Chem. 2008 Mar;46(3):299-305. (PMID: 18236415)
Biomacromolecules. 2010 Apr 12;11(4):904-10. (PMID: 20175586)
Chem Rev. 2001 Sep;101(9):2921-90. (PMID: 11749397)
Arch Biochem Biophys. 1988 Apr;262(1):99-110. (PMID: 3355177)

Keywords: Eucalyptus globulus; concrete; dispersion; laccase; lignosulfonate; poly(ethylene glycol); poly(propylene glycol); polyoxometalate

Date Created: 20211210 Latest Revision: 20240404

20240404

PMC8658405

10.3390/ma14237388

34885542