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Thursday, May 14, 2020 | History

2 edition of Polyelectrolyte adsorption on wood fibers found in the catalog.

Polyelectrolyte adsorption on wood fibers

Joanna Lee Koethe

Polyelectrolyte adsorption on wood fibers

the mechanism of surface charge decay

by Joanna Lee Koethe

  • 240 Want to read
  • 27 Currently reading

Published .
Written in English

    Subjects:
  • Polyelectrolytes,
  • Papermaking

  • Edition Notes

    Statementby Joanna Lee Koethe
    The Physical Object
    Paginationix, 114 leaves :
    Number of Pages114
    ID Numbers
    Open LibraryOL14696912M

    A maximum adsorption of ~ 10 μmol/g-pulp of phosphate ions was achieved on oxidized fibers treated with PVAm. Although a layer of adsorbed PVAm greatly increases the anion exchange capacity of cellulose fibers, the modified pulp showed a very low phosphate binding capacity of mol phosphates per mol of : Reem Zeitoun.   Cationic polyelectrolytes (polyallylamine and polyvinylamine with different molecular masses) were adsorbed onto lignocellulosic fibres from unbleached and unbeaten spruce chemical fibres with different kappa numbers to investigate the effects on the mechanical properties of the final paper materials. Adsorption isotherms were first established to determine the maximum quantity of polymer Cited by:

    An examination of the fundamental nature of polyelectrolytes, static and dynamic properties of salt-free and salt-added solutions, and interactions with other charged and neutral species at interfaces with applications to industry and medicine. It applies the Metropolis Monte Carlo simulation to cal. The formation of polyelectrolyte complex (PEC) wool fibers formed by dipping chitosan or gellan gum-treated wool fibers into biopolymer solutions of opposite charge is reported. Treating wool fibers with chitosan (CH) and gellan gum (GG) solutions containing food dyes resulted in improved mechanical characteristics compared to wool fibers. In contrast, pH modification of the solutions resulted Cited by: 1.

    Dr. Scott Renneckar investigates the molecular structure and reactions of wood to transform trees and recycled fiber into novel materials that will serve as a platform for the bioeconomy. Nanocomposite–based lignocellulosic fibers 3. Polyelectrolyte adsorption onto heterogeneous fiber surfaces Nanoscale coatings on wood.   Surface Characterization of Mechanical Pulp Fibers by Contact Angle Measurement, Polyelectrolyte Adsorption, XPS, and AFM Per Stenius Laboratory of Forest Products Chemistry, Helsinki University of Technology, TKK, FinlandCited by: 2.


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Polyelectrolyte adsorption on wood fibers by Joanna Lee Koethe Download PDF EPUB FB2

Adsorption isotherm of PDADMAC (30k) on wood fibers in M NaCl. The adsorption time was 10 min and the adsorbed amount was determined using polyelectrolyte titration. The corresponding isotherm for high-molecular-mass PDADMAC (>k), taken from Lingström et al., is included in the figure for by: The present investigation has been focused on studying the adsorption of three different molecular mass fractions of a polydimethyldiallylammonium chloride (DMDAAC) ( (LMw), 48 (MMw), and 1 (HMw)) on bleached chemical fibers.

Both kinetics of adsorption and equilibrium adsorption measurements have been conducted, and the adsorption has been measured by polyelectrolyte Cited by:   The present investigation has been focused on studying the adsorption of three different molecular mass fractions of a polydimethyldiallylammonium chloride (DMDAAC) ( (LMw), 48 (MMw), and 1 (HMw)) on bleached chemical fibers.

Both kinetics of adsorption and equilibrium adsorption measurements have been conducted, and the adsorption has been measured by polyelectrolyte Cited by: Article A model for the adsorption of polyelectrolytes on pulp fibers: Relation between fiber structure and polyelectrolyte properties was published on 01 Dec in the journal Nordic Pulp & Paper Research Journal (Vol Issue 5).

For a polyelectrolyte of a Polyelectrolyte adsorption on wood fibers book molecular mass, polydimethyldiallylammonium chloride (DMDAAC), the adsorption is lower and the resulting equilibrium adsorption is not stoichiometrically proportional to the charge on the fibers.

Previous article. in issue. Next article. in by: The Effects of Cellulosic Fiber Charges on Polyelectrolyte Adsorption and Fiber-Fiber Interactions STFI, Swedish Pulp and Paper Research Institute BoxSE Stockholm, Sweden Abstract The surface charges of cellulosic fibers contribute to several papermaking operations that influence the manufacture and final properties of by: 4.

In the remaining of the paper we review the adsorption of flexible and semi-rigid polyelectrolyte chains on planar surfaces. We discuss the adsorption of a single polyelectrolyte chain on a charged surface of opposite charge.

Section 3 is devoted to the mean-field theory of multi-chain polyelectrolyte adsorption on a charged surface. The reactants were refluxed for one hour. The pulp samples were then filtered and washed with a sequence of deion- ized water, M acetic acid, and deionized water again.

The pulps were Appropriate Conditions for Polyelectrolyte Titration to Determine the Charge of Cellulosic Fibers finally placed in a 4% NaHCO. Adsorption of flexible polyelectrolytes on charged surfaces A.

Subbotina and A. Semenov*b Adsorption of weakly charged polyelectrolyte (PE) chains from dilute solution on an oppositely charged surface is studied using the self-consistent mean-field approach.

The structure of the adsorbed polymerCited by: 1. This chapter describes the use of PECs in paper-making applications where the PECs are used for tailoring the surfaces of wood-based fibres.

Initially a detailed description of the adsorption process is given, in more general terms, and in this respect both in situ formed and pre-formed complexes are by: 6. Handbook of Polyelectrolytes and Their Applications; find Aldrich-Z MSDS, related peer-reviewed papers, technical documents, similar products & more at Sigma-Aldrich.

Handbook of Polyelectrolytes and Their Applications ISBN ISBN This book is the first major reference source to provide. A model for the adsorption of polyelectrolytes on pulp fibers: Relation between fiber structure and polyelectrolyte properties Apparent slip velocity of paper coatings in viscometric flows Runnability and flow-induced aggregation of paper coating suspensionsCited by: Complexes.

Luc Belloni, Jean Louis Sikorav, ectrolyte adsorption on a single surface in two situations: adsorption of a single. The phenomenon of polyelectrolyte adsorption on a planar surface ations of proteinpolyelectrolyte systems have been strongly influenced by.

be higher for eucalyptus wood (Magaton et al. The presence of glucuronic acids on xylan impairs its adsorption on cellulosic fibers that are anionic. Silva et al. () found that at high temperatures (90ºC to ºC) and long adsorption times (1 to 4 h), low uronic acid content xylan had greater adsorptionFile Size: KB.

Polyelectrolyte adsorption, interparticle forces, and colloidal aggregation. Istvan Szilagyi, Gregor Trefalt, Alberto Tiraferri, Plinio Maroni and Michal Borkovec * Department of Inorganic and Analytical Chemistry, University of Geneva, Sciences II, Quai Ernest-Anser Geneva, by: The adsorption of a low (LMw) and a high molecular weight (HMw) PEI onto cellulose fibers and carboxymethylated (CM) cellulose fibers was investigated using polyelectrolyte titration.

The fibers. Employing polyions with a reduced charge density along the chain, i.e. consisting of charged and uncharged co-monomers, it was observed that a minimum charge density is required for polyelectrolyte adsorption.

Changing the ionic strength by addition of salt can modulate the electrostatic interactions in a polyelectrolyte solution. The.

Correlation Analysis for Fiber Characteristics and Strength Properties of Softwood Kraft Pulps from Different Stages of a Bleaching Fiber Line. Benping Lin, a*,b Beihai He, a Yanlan Liu, b and Lefan Ma b.

During sequential bleaching operations, pulp fiber properties are gradually changed due to mechanical and chemical treatments. The adsorption of a strong, highly charged cationic polyelectrolyte to a kraft lignin thin film was investigated as a function of the adsorbing solution conditions using the quartz crystal.

Book 3 Forest Products Chemistry Series editors Johan Gullichsen, Helsinki University of Technology Hannu Paulapuro, Helsinki University of Technology Book editor Per Stenius, Helsinki University of Technology Series reviewer Brian Attwood, St.

Anne’s Paper and Paperboard Developments, Ltd. Book reviewer Thomas Joyce, Western Michigan University. The adsorption and desorption behaviour of a cationic polyelectrolyte contacted with wood pulp fibers was determined by total nitrogen analysis using a pyrolysis/chemiluminescence detection system.

Dialysed polymer generated an adsorption isotherm of higher affinity than did non-dialysed by: 3.adsorption, chlorides, clay, electrolytes, lignin, montmorillonite, nitrogen, pH, residual effects, wood fibers Abstract: Wood and natural fibers are composed of multiple polymeric components.

Lignin, one primary component, is typically removed to various degrees during paper-making, but is present on thermomechanically isolated fibers.Water purification using polyelectrolyte modified cellulose fibers and filters to adsorb bacteria Ottenhall, Anna KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Wood Chemistry and Pulp : Anna Ottenhall.