Dissolved and colloidal substances from mechanical pulp suspensions - stability and flocculation behaviour

Jan Nylund; Olai Lagus; Jarl B. Rosenholm

doi:10.1016/0927-7757(95)03088-3

Dissolved and colloidal substances from mechanical pulp suspensions - stability and flocculation behaviour

Jan Nylund, Olai Lagus, Jarl B. Rosenholm

Laboratory of Molecular Science and Engineering

Research output: Contribution to journal › Article › Scientific › peer-review

23 Citations (Scopus)

Abstract

The stability of the colloidal material present in unbleached thermomechanical pulp suspensions was investigated. Flocculation was induced with linear cationic polyacrylamides having different charge densities but equal molecular weights. The results indicate that the formation of polyelectrolyte complexes plays an important role in the destabilization of the colloidal particles in the suspension. The properties of the polyelectrolyte complexes formed between dissolved wood polymers and added cationic polyelectrolytes were observed to be dependent on the charge density of the cationic polyelectrolyte. Very large non-stoichiometric polyelectrolyte complexes seemed to be formed. Complex formation on the particle surfaces was found to be of importance for the flocculation and stability behaviour of the colloidal particles. © 1995.

Original language	English
Pages (from-to)	137-146
Number of pages	10
Journal	Colloids and Surfaces A: Physicochemical and Engineering Aspects
Volume	104
Issue number	2-3
DOIs	https://doi.org/10.1016/0927-7757(95)03088-3
Publication status	Published - 1995
MoE publication type	A1 Journal article-refereed

Keywords

Charged density
Colloidal stability
Detrimental substances
Mechanical pulp
Polyelectrolyte complex

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10.1016/0927-7757(95)03088-3

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title = "Dissolved and colloidal substances from mechanical pulp suspensions - stability and flocculation behaviour",

abstract = "The stability of the colloidal material present in unbleached thermomechanical pulp suspensions was investigated. Flocculation was induced with linear cationic polyacrylamides having different charge densities but equal molecular weights. The results indicate that the formation of polyelectrolyte complexes plays an important role in the destabilization of the colloidal particles in the suspension. The properties of the polyelectrolyte complexes formed between dissolved wood polymers and added cationic polyelectrolytes were observed to be dependent on the charge density of the cationic polyelectrolyte. Very large non-stoichiometric polyelectrolyte complexes seemed to be formed. Complex formation on the particle surfaces was found to be of importance for the flocculation and stability behaviour of the colloidal particles. {\textcopyright} 1995.",

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TY - JOUR

T1 - Dissolved and colloidal substances from mechanical pulp suspensions - stability and flocculation behaviour

AU - Nylund, Jan

AU - Lagus, Olai

AU - Rosenholm, Jarl B.

PY - 1995

Y1 - 1995

N2 - The stability of the colloidal material present in unbleached thermomechanical pulp suspensions was investigated. Flocculation was induced with linear cationic polyacrylamides having different charge densities but equal molecular weights. The results indicate that the formation of polyelectrolyte complexes plays an important role in the destabilization of the colloidal particles in the suspension. The properties of the polyelectrolyte complexes formed between dissolved wood polymers and added cationic polyelectrolytes were observed to be dependent on the charge density of the cationic polyelectrolyte. Very large non-stoichiometric polyelectrolyte complexes seemed to be formed. Complex formation on the particle surfaces was found to be of importance for the flocculation and stability behaviour of the colloidal particles. © 1995.

AB - The stability of the colloidal material present in unbleached thermomechanical pulp suspensions was investigated. Flocculation was induced with linear cationic polyacrylamides having different charge densities but equal molecular weights. The results indicate that the formation of polyelectrolyte complexes plays an important role in the destabilization of the colloidal particles in the suspension. The properties of the polyelectrolyte complexes formed between dissolved wood polymers and added cationic polyelectrolytes were observed to be dependent on the charge density of the cationic polyelectrolyte. Very large non-stoichiometric polyelectrolyte complexes seemed to be formed. Complex formation on the particle surfaces was found to be of importance for the flocculation and stability behaviour of the colloidal particles. © 1995.

KW - Charged density

KW - Colloidal stability

KW - Detrimental substances

KW - Mechanical pulp

KW - Polyelectrolyte complex

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U2 - 10.1016/0927-7757(95)03088-3

DO - 10.1016/0927-7757(95)03088-3

M3 - Article

SN - 0927-7757

VL - 104

SP - 137

EP - 146

JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects

JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects

IS - 2-3

ER -

Dissolved and colloidal substances from mechanical pulp suspensions - stability and flocculation behaviour

Abstract

Keywords

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