Determination of the adsorption character of cellulose fibres using surface tension and surface charge

Stana‐Kleinschek, Karin; Ribitsch, Volker; Kreže, Tatjana; Fras, Lidija

doi:10.1007/s10019-002-0168-4

Cited by 69 publications

(37 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 2 shows the zeta potential changes of the modified fibers with different deposited layers in the LBL self-assembly process. The original fibers had a negative potential of -17.5 ± 0.8 mV due to the presence of carboxyl and hydroxyl groups (Kleinschek et al 2002) in cellulose macromolecules. The deposition of CPAM caused a reversal in zeta potential to 18.2 ± 2.3 mV, subsequent deposition of LS onto CPAM-coated fibers once again reversed the zeta potential to -15.2 ± 1.8 mV.…”

Section: Formation Of Cpam/ls Multilayers On Cellulose Fibermentioning

confidence: 99%

Surface modification of cellulose fibers with layer-by-layer self-assembly of lignosulfonate and polyelectrolyte: effects on fibers wetting properties and paper strength

Peng

et al. 2012

Cellulose

View full text Add to dashboard Cite

To convert the hydrophilic cellulose fiber into hydrophobic, multilayers composed of cationic polyacrylamide (CPAM) and lignosulfonate (LS) were constructed on cellulose fiber surface using layer-bylayer (LBL) self-assembly technique. The presence of CPAM/LS multilayers were validated by zeta potential, X-ray photoelectron spectroscopy and atomic force microscopy (AFM). It was found that potential of fiber surface inversed after deposition of each layer, the contents of characteristic elements (i.e. S and N) of CPAM/LS multilayers increased with increasing bilayer number, furthermore, the calculated surface LS content increased linearly as a function of bilayers. AFM phase images indicated that the cellulose microfibrils on fiber surface were gradually covered by LS granules, resulting in an increase in fiber surface roughness as self-assembly proceeded. The wetting properties of modified cellulose fibers were detected by dynamic contact angle measurement. The results showed that the initial water contact angle gradually increased and the attenuation rate of the contact angle gradually decreased with the number of bilayers, suggesting that the controllable hydrophobicity of cellulose fiber can be achieved depending on the number of bilayers. It also showed that the polyelectrolyte presented in the outermost layer significantly influenced the wetting properties of cellulose fibers, and a higher hydrophobicity was observed when LS was in the outermost layer. Moreover, tensile strength test was performed on the handsheet prepared from LBL modified fibers to evaluate the effect of CPAM/ LS multilayers on strength property of cellulose fiber networks. The tensile index of handsheet prepared from fibers modified with a (CPAM/LS) 5 multilayer increased by 12.4% compared with that of handsheet prepared from original fibers. The print density of handsheet increased with the number of bilayers, suggesting that printability of the handsheet was improved by constructing CPAM/LS multilayers on cellulose fiber surface. This strategy will have a positive impact and potential application value in printing process control of cellulose fiber-based products.

show abstract

Section: Formation Of Cpam/ls Multilayers On Cellulose Fibermentioning

confidence: 99%

Surface modification of cellulose fibers with layer-by-layer self-assembly of lignosulfonate and polyelectrolyte: effects on fibers wetting properties and paper strength

Peng

et al. 2012

Cellulose

View full text Add to dashboard Cite

show abstract

“…Cellulosic fibers develop a negative surface charge in aqueous solutions (Trotman 1984;Stana-Kleinschek et al 2002), thereby introducing an electrostatic component to fiber-salt interactions. The strength of electrostatic forces (attractive or repulsive) between charged bodies is directly proportional to their charge densities.…”

Section: Salt Sorption and Desorptionmentioning

confidence: 99%

Sorption studies on regenerated cellulosic fibers in salt–alkali mixtures

2006

View full text Add to dashboard Cite

The degrees of salt sorption were determined in lyocell and viscose fibers immersed in aqueous solutions of salt-alkali mixtures with the aim of using salt sorption as an indirect measure of changes to fiber accessibility in presence of alkali. The salt-alkali mixtures used were combinations of NaOH with NaCl or NaBr, and of KOH with KCl or KBr. In general, salt sorption in fibers increased with increase in alkali concentration up to 2 mol/l, and did not change significantly thereafter. The accessibility of Br ) salts was greater than the Cl ) salts, but that of the Na + salts was greater than the K + salts. These trends in salt sorption indicate that salt accessibility in fibers is not influenced by the size of hydrated salt ions, but by the forces of electrostatic attraction and repulsion between the charged fiber surface and salt cations and anions.Nomenclature: [X] f -Alkali or salt sorbed by fiber (mol/g Fiber); [X] s -Alkali or salt content in treatment liquor (mol/l); [Y] f -Alkali or salt desorbed by fiber (mol/g fiber); [Y] s -Alkali or salt content in wash liquor (mol/l); CLY -Lyocell fibers without spin finish; CLY-sp -Lyocell fibers with spin finish CV -Viscose fibers; MC -Fractional moisture content of fibers; SRV -Solution retention value of fiber (ml/g); V -Volume of wash liquor (ml); W C -Weight of conditioned fibers; W D -Weight of dry fibers (g) W S -Weight of oven-dried fibers (g); W W -Weight of wet fibers (g); q -Density of treatment solution (g/ml)

show abstract

“…Zeta-potential measurements show that regenerated cellulose (also called Lyocell) has a negatively charged surface [39]. Supposedly, the ionizable groups within the regenerated cellulose originate from impurities in the used raw Avicel material and oxidation products due to processing [40].…”

Section: Polyelectrolyte Adsorption and Sticking Of Cellulose Beadsmentioning

confidence: 99%

Molecularly smooth cellulose surfaces for adhesion studies

Sczech

Riegler

2006

Journal of Colloid and Interface Science

View full text Add to dashboard Cite

Determination of the adsorption character of cellulose fibres using surface tension and surface charge

Cited by 69 publications

References 4 publications

Surface modification of cellulose fibers with layer-by-layer self-assembly of lignosulfonate and polyelectrolyte: effects on fibers wetting properties and paper strength

Surface modification of cellulose fibers with layer-by-layer self-assembly of lignosulfonate and polyelectrolyte: effects on fibers wetting properties and paper strength

Sorption studies on regenerated cellulosic fibers in salt–alkali mixtures

Molecularly smooth cellulose surfaces for adhesion studies

Contact Info

Product

Resources

About