Adsorption of cationic amylopectin on microcrystalline cellulose.

H.G.M. van de Steeg; A. de Keizer; M.A. Cohen Stuart; B.H. Bijsterbosch

doi:10.1016/0927-7757(93)80498-4

Adsorption of cationic amylopectin on microcrystalline cellulose.

H.G.M. van de Steeg, A. de Keizer, M.A. Cohen Stuart, B.H. Bijsterbosch

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Abstract

The effects of electrolyte concentration and pH on the adsorption of cationic amylopectin on microcrystalline cellulose were investigated. The adsorbed amount in the pseudo-plateau of the isotherm showed a maximum as a function of the electrolyte concentration. We compared the data with a recent theory on polyelectrolyte adsorption. The increase in the adsorbed amount with pH was strongly correlated with the increase in surface charge, indicating the central role of electrostatic attraction between adsorbate and substrate. However, the maximum in the adsorption results from two additional effects: (i) a non-electrostatic attraction between polymer and surface and (ii) specific adsorption of counter-ions. The specificity of the latter adsorption increases in the order Cs > K ≈ Na > Li .

Original language	English
Pages (from-to)	77-89
Journal	Colloids and Surfaces. A: Physicochemical and Engineering Aspects
Volume	70
DOIs	https://doi.org/10.1016/0927-7757(93)80498-4
Publication status	Published - 1993

Keywords

Adsorption
amylopectin
cationic starch
microcrystalline cellulose
waxy maize.

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@article{273acd89c21c42ae8677171ab59cc620,

title = "Adsorption of cationic amylopectin on microcrystalline cellulose.",

abstract = "The effects of electrolyte concentration and pH on the adsorption of cationic amylopectin on microcrystalline cellulose were investigated. The adsorbed amount in the pseudo-plateau of the isotherm showed a maximum as a function of the electrolyte concentration. We compared the data with a recent theory on polyelectrolyte adsorption. The increase in the adsorbed amount with pH was strongly correlated with the increase in surface charge, indicating the central role of electrostatic attraction between adsorbate and substrate. However, the maximum in the adsorption results from two additional effects: (i) a non-electrostatic attraction between polymer and surface and (ii) specific adsorption of counter-ions. The specificity of the latter adsorption increases in the order Cs > K ≈ Na > Li .",

keywords = "Adsorption, amylopectin, cationic starch, microcrystalline cellulose, waxy maize.",

author = "{van de Steeg}, H.G.M. and {de Keizer}, A. and {Cohen Stuart}, M.A. and B.H. Bijsterbosch",

year = "1993",

doi = "10.1016/0927-7757(93)80498-4",

language = "English",

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pages = "77--89",

journal = "Colloids and Surfaces. A: Physicochemical and Engineering Aspects",

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TY - JOUR

T1 - Adsorption of cationic amylopectin on microcrystalline cellulose.

AU - van de Steeg, H.G.M.

AU - de Keizer, A.

AU - Cohen Stuart, M.A.

AU - Bijsterbosch, B.H.

PY - 1993

Y1 - 1993

N2 - The effects of electrolyte concentration and pH on the adsorption of cationic amylopectin on microcrystalline cellulose were investigated. The adsorbed amount in the pseudo-plateau of the isotherm showed a maximum as a function of the electrolyte concentration. We compared the data with a recent theory on polyelectrolyte adsorption. The increase in the adsorbed amount with pH was strongly correlated with the increase in surface charge, indicating the central role of electrostatic attraction between adsorbate and substrate. However, the maximum in the adsorption results from two additional effects: (i) a non-electrostatic attraction between polymer and surface and (ii) specific adsorption of counter-ions. The specificity of the latter adsorption increases in the order Cs > K ≈ Na > Li .

AB - The effects of electrolyte concentration and pH on the adsorption of cationic amylopectin on microcrystalline cellulose were investigated. The adsorbed amount in the pseudo-plateau of the isotherm showed a maximum as a function of the electrolyte concentration. We compared the data with a recent theory on polyelectrolyte adsorption. The increase in the adsorbed amount with pH was strongly correlated with the increase in surface charge, indicating the central role of electrostatic attraction between adsorbate and substrate. However, the maximum in the adsorption results from two additional effects: (i) a non-electrostatic attraction between polymer and surface and (ii) specific adsorption of counter-ions. The specificity of the latter adsorption increases in the order Cs > K ≈ Na > Li .

KW - Adsorption

KW - amylopectin

KW - cationic starch

KW - microcrystalline cellulose

KW - waxy maize.

U2 - 10.1016/0927-7757(93)80498-4

DO - 10.1016/0927-7757(93)80498-4

M3 - Article

SN - 0927-7757

VL - 70

SP - 77

EP - 89

JO - Colloids and Surfaces. A: Physicochemical and Engineering Aspects

JF - Colloids and Surfaces. A: Physicochemical and Engineering Aspects

ER -

Adsorption of cationic amylopectin on microcrystalline cellulose.

Abstract

Keywords

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