Complexes of xylan and synthetic polyelectrolytes. Characterization and adsorption onto high quality unbleached fibres

P. Mocchiutti (Corresponding Author), M.V. Galvan, Soledad Peresin (Corresponding Author), C.N. Schnell, M.A. Zanuttini

Research output: Contribution to journalArticleScientificpeer-review

12 Citations (Scopus)

Abstract

In this work, polyelectrolyte complexes (PECs) were formed by adding polyacrylic acid (PAA) or 4-O-methylglucuronoxylan (Xyl) on poly(allylamine hydrochloride) (PAH) solutions, at different ionic strength and neutral pH. Turbidity curves, charge densities of the cationic complexes determined by polyelectrolyte titration method, and z-potential values showed clear differences between both complexes. Stirring favourably reverses the effects of sedimentation of Xyl/PAH complexes, as demonstrated by colloidal stability tests. Adsorption studies on silica surfaces, performed by Quartz Crystal Microbalance with Dissipation (QCM-D) showed that PAA/PAH adsorbed complexes layers were rigid, while the corresponding Xyl/PAH layers were viscoelastic. Despite the different conformations, both complexes were adsorbed as spherical particles, as observed by Atomic Force Microscopy (AFM). Adsorption isotherms performed on fibre suspensions showed that the ionic strength of the liquid medium determines the amount of PEC retained. Finally, it was found that the papermaking properties were significantly increased due to the addition of these PECs.
Original languageEnglish
Pages (from-to)131-139
JournalCarbohydrate Polymers
Volume116
DOIs
Publication statusPublished - 2015
MoE publication typeA1 Journal article-refereed

Fingerprint

Xylans
carbopol 940
Polyelectrolytes
Adsorption
Fibers
Ionic strength
Acids
Papermaking
Quartz crystal microbalances
Turbidity
Charge density
Titration
Adsorption isotherms
Sedimentation
Silicon Dioxide
Conformations
Atomic force microscopy
Suspensions
Silica
polyallylamine

Keywords

  • Adsorption isotherm
  • colloidal stability
  • complex size
  • papermaking properties

Cite this

Mocchiutti, P. ; Galvan, M.V. ; Peresin, Soledad ; Schnell, C.N. ; Zanuttini, M.A. / Complexes of xylan and synthetic polyelectrolytes. Characterization and adsorption onto high quality unbleached fibres. In: Carbohydrate Polymers. 2015 ; Vol. 116. pp. 131-139.
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Complexes of xylan and synthetic polyelectrolytes. Characterization and adsorption onto high quality unbleached fibres. / Mocchiutti, P. (Corresponding Author); Galvan, M.V.; Peresin, Soledad (Corresponding Author); Schnell, C.N.; Zanuttini, M.A.

In: Carbohydrate Polymers, Vol. 116, 2015, p. 131-139.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Complexes of xylan and synthetic polyelectrolytes. Characterization and adsorption onto high quality unbleached fibres

AU - Mocchiutti, P.

AU - Galvan, M.V.

AU - Peresin, Soledad

AU - Schnell, C.N.

AU - Zanuttini, M.A.

N1 - SDA: SHP: Bioeconomy

PY - 2015

Y1 - 2015

N2 - In this work, polyelectrolyte complexes (PECs) were formed by adding polyacrylic acid (PAA) or 4-O-methylglucuronoxylan (Xyl) on poly(allylamine hydrochloride) (PAH) solutions, at different ionic strength and neutral pH. Turbidity curves, charge densities of the cationic complexes determined by polyelectrolyte titration method, and z-potential values showed clear differences between both complexes. Stirring favourably reverses the effects of sedimentation of Xyl/PAH complexes, as demonstrated by colloidal stability tests. Adsorption studies on silica surfaces, performed by Quartz Crystal Microbalance with Dissipation (QCM-D) showed that PAA/PAH adsorbed complexes layers were rigid, while the corresponding Xyl/PAH layers were viscoelastic. Despite the different conformations, both complexes were adsorbed as spherical particles, as observed by Atomic Force Microscopy (AFM). Adsorption isotherms performed on fibre suspensions showed that the ionic strength of the liquid medium determines the amount of PEC retained. Finally, it was found that the papermaking properties were significantly increased due to the addition of these PECs.

AB - In this work, polyelectrolyte complexes (PECs) were formed by adding polyacrylic acid (PAA) or 4-O-methylglucuronoxylan (Xyl) on poly(allylamine hydrochloride) (PAH) solutions, at different ionic strength and neutral pH. Turbidity curves, charge densities of the cationic complexes determined by polyelectrolyte titration method, and z-potential values showed clear differences between both complexes. Stirring favourably reverses the effects of sedimentation of Xyl/PAH complexes, as demonstrated by colloidal stability tests. Adsorption studies on silica surfaces, performed by Quartz Crystal Microbalance with Dissipation (QCM-D) showed that PAA/PAH adsorbed complexes layers were rigid, while the corresponding Xyl/PAH layers were viscoelastic. Despite the different conformations, both complexes were adsorbed as spherical particles, as observed by Atomic Force Microscopy (AFM). Adsorption isotherms performed on fibre suspensions showed that the ionic strength of the liquid medium determines the amount of PEC retained. Finally, it was found that the papermaking properties were significantly increased due to the addition of these PECs.

KW - Adsorption isotherm

KW - colloidal stability

KW - complex size

KW - papermaking properties

U2 - 10.1016/j.carbpol.2014.04.081

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SP - 131

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JO - Carbohydrate Polymers

JF - Carbohydrate Polymers

SN - 0144-8617

ER -