Adhesive Hard-Sphere Colloidal Dispersions: A Small-Angle Neutron-Scattering Study of Stickiness and the Structure Factor

C.G. de Kruif; P.W. Rouw; W.J. Briels; M.H.G. Duits; A. Vrij; R.P. May

doi:10.1021/la00086a023

Adhesive Hard-Sphere Colloidal Dispersions: A Small-Angle Neutron-Scattering Study of Stickiness and the Structure Factor

C.G. de Kruif, P.W. Rouw, W.J. Briels, M.H.G. Duits, A. Vrij, R.P. May

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Abstract

Small-angle neutron-scattering structure factor measurements were made on sterically stabilized silica spheres dispersed in benzene up to volume fractions of 0.30. Benzene is only a marginal solvent for the stabilizing layer on the surface of the particles. The particles are made attractive by lowering temperature. This attraction is modeled by a square well potential, the depth of which varies with temperature. At the highest temperature studied, our experimental system behaved effectively as an assembly of hard spheres, whereas at the lowest temperature the system approaches a spinodal. Using Baxter's theory we were able to evaluate the interaction parameters and to calculate the structure factor. Experimental structure factors were satisfactorily reproduced over the entire temperature range studied.

Original language	English
Pages (from-to)	422-428
Journal	Langmuir
Volume	5
Issue number	2
DOIs	https://doi.org/10.1021/la00086a023
Publication status	Published - 1989

Keywords

IR-59450

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Kruif1989adhesiveFinal published version, 788 KB

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title = "Adhesive Hard-Sphere Colloidal Dispersions: A Small-Angle Neutron-Scattering Study of Stickiness and the Structure Factor",

abstract = "Small-angle neutron-scattering structure factor measurements were made on sterically stabilized silica spheres dispersed in benzene up to volume fractions of 0.30. Benzene is only a marginal solvent for the stabilizing layer on the surface of the particles. The particles are made attractive by lowering temperature. This attraction is modeled by a square well potential, the depth of which varies with temperature. At the highest temperature studied, our experimental system behaved effectively as an assembly of hard spheres, whereas at the lowest temperature the system approaches a spinodal. Using Baxter's theory we were able to evaluate the interaction parameters and to calculate the structure factor. Experimental structure factors were satisfactorily reproduced over the entire temperature range studied.",

keywords = "IR-59450",

author = "{de Kruif}, C.G. and P.W. Rouw and W.J. Briels and M.H.G. Duits and A. Vrij and R.P. May",

year = "1989",

doi = "10.1021/la00086a023",

language = "English",

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journal = "Langmuir",

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T1 - Adhesive Hard-Sphere Colloidal Dispersions

T2 - A Small-Angle Neutron-Scattering Study of Stickiness and the Structure Factor

AU - de Kruif, C.G.

AU - Rouw, P.W.

AU - Briels, W.J.

AU - Duits, M.H.G.

AU - Vrij, A.

AU - May, R.P.

PY - 1989

Y1 - 1989

N2 - Small-angle neutron-scattering structure factor measurements were made on sterically stabilized silica spheres dispersed in benzene up to volume fractions of 0.30. Benzene is only a marginal solvent for the stabilizing layer on the surface of the particles. The particles are made attractive by lowering temperature. This attraction is modeled by a square well potential, the depth of which varies with temperature. At the highest temperature studied, our experimental system behaved effectively as an assembly of hard spheres, whereas at the lowest temperature the system approaches a spinodal. Using Baxter's theory we were able to evaluate the interaction parameters and to calculate the structure factor. Experimental structure factors were satisfactorily reproduced over the entire temperature range studied.

AB - Small-angle neutron-scattering structure factor measurements were made on sterically stabilized silica spheres dispersed in benzene up to volume fractions of 0.30. Benzene is only a marginal solvent for the stabilizing layer on the surface of the particles. The particles are made attractive by lowering temperature. This attraction is modeled by a square well potential, the depth of which varies with temperature. At the highest temperature studied, our experimental system behaved effectively as an assembly of hard spheres, whereas at the lowest temperature the system approaches a spinodal. Using Baxter's theory we were able to evaluate the interaction parameters and to calculate the structure factor. Experimental structure factors were satisfactorily reproduced over the entire temperature range studied.

KW - IR-59450

U2 - 10.1021/la00086a023

DO - 10.1021/la00086a023

M3 - Article

SN - 0743-7463

VL - 5

SP - 422

EP - 428

JO - Langmuir

JF - Langmuir

IS - 2

ER -

Adhesive Hard-Sphere Colloidal Dispersions: A Small-Angle Neutron-Scattering Study of Stickiness and the Structure Factor

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