Abstract

In this paper the results of research of the influence of particle size and material in aqueous suspensions of diamond particles which included both diamond and graphite on suspension refractive index are presented. Eight fractions of nanodiamond were isolated using particle sedimentation and dilute suspensions were characterized using dynamic light scattering (DLS) method and electro-optical method. The increment of suspension refractive index was determined using diffraction, refraction, and reflection. Theoretical calculations of the dependence of refractive index increment of suspensions on the radius of diamond and graphite particles of spherical shape were carried out. The applicability of this approximation was supported by static light scattering experimental data. By comparing theoretical and experimental values of the increment of the refractive index it was possible to conclude that both diamond and graphite is present in the dispersed phase. It was shown that the removal of large particles from suspensions by centrifugation has little effect on its refractive index, but significantly reduces turbidity. It was demonstrated that particle aggregation leads to a decrease of the suspension refractive index, which can be used for express analysis of stability of aqueous suspensions of diamond particles.

Original languageEnglish
Pages (from-to)417-422
Number of pages6
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Volume538
DOIs
Publication statusPublished - 5 Feb 2018

Fingerprint

Light refraction
Diamond
refraction
Diamonds
Refractive index
Suspensions
diamonds
refractivity
Graphite
graphite
Nanodiamonds
light scattering
Centrifugation
Dynamic light scattering
Turbidity
Refraction
Sedimentation
Light scattering
turbidity
Agglomeration

Scopus subject areas

  • Surfaces and Interfaces
  • Physical and Theoretical Chemistry
  • Colloid and Surface Chemistry

Cite this

@article{3db7921d5c6d4c908ce64b408b642653,
title = "Light refraction in aqueous suspensions of diamond particles",
abstract = "In this paper the results of research of the influence of particle size and material in aqueous suspensions of diamond particles which included both diamond and graphite on suspension refractive index are presented. Eight fractions of nanodiamond were isolated using particle sedimentation and dilute suspensions were characterized using dynamic light scattering (DLS) method and electro-optical method. The increment of suspension refractive index was determined using diffraction, refraction, and reflection. Theoretical calculations of the dependence of refractive index increment of suspensions on the radius of diamond and graphite particles of spherical shape were carried out. The applicability of this approximation was supported by static light scattering experimental data. By comparing theoretical and experimental values of the increment of the refractive index it was possible to conclude that both diamond and graphite is present in the dispersed phase. It was shown that the removal of large particles from suspensions by centrifugation has little effect on its refractive index, but significantly reduces turbidity. It was demonstrated that particle aggregation leads to a decrease of the suspension refractive index, which can be used for express analysis of stability of aqueous suspensions of diamond particles.",
keywords = "Detonation diamond, Dynamic light scattering, Electro-optical effect, Refractive index, Static light scattering, Suspensions, Turbidity",
author = "Voitylov, {A. V.} and Veso, {O. S.} and Petrov, {M. P.} and Rolich, {V. I.} and Trusov, {A. A.} and Vojtylov, {V. V.}",
year = "2018",
month = "2",
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language = "English",
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journal = "Colloids and Surfaces A: Physicochemical and Engineering Aspects",
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T1 - Light refraction in aqueous suspensions of diamond particles

AU - Voitylov, A. V.

AU - Veso, O. S.

AU - Petrov, M. P.

AU - Rolich, V. I.

AU - Trusov, A. A.

AU - Vojtylov, V. V.

PY - 2018/2/5

Y1 - 2018/2/5

N2 - In this paper the results of research of the influence of particle size and material in aqueous suspensions of diamond particles which included both diamond and graphite on suspension refractive index are presented. Eight fractions of nanodiamond were isolated using particle sedimentation and dilute suspensions were characterized using dynamic light scattering (DLS) method and electro-optical method. The increment of suspension refractive index was determined using diffraction, refraction, and reflection. Theoretical calculations of the dependence of refractive index increment of suspensions on the radius of diamond and graphite particles of spherical shape were carried out. The applicability of this approximation was supported by static light scattering experimental data. By comparing theoretical and experimental values of the increment of the refractive index it was possible to conclude that both diamond and graphite is present in the dispersed phase. It was shown that the removal of large particles from suspensions by centrifugation has little effect on its refractive index, but significantly reduces turbidity. It was demonstrated that particle aggregation leads to a decrease of the suspension refractive index, which can be used for express analysis of stability of aqueous suspensions of diamond particles.

AB - In this paper the results of research of the influence of particle size and material in aqueous suspensions of diamond particles which included both diamond and graphite on suspension refractive index are presented. Eight fractions of nanodiamond were isolated using particle sedimentation and dilute suspensions were characterized using dynamic light scattering (DLS) method and electro-optical method. The increment of suspension refractive index was determined using diffraction, refraction, and reflection. Theoretical calculations of the dependence of refractive index increment of suspensions on the radius of diamond and graphite particles of spherical shape were carried out. The applicability of this approximation was supported by static light scattering experimental data. By comparing theoretical and experimental values of the increment of the refractive index it was possible to conclude that both diamond and graphite is present in the dispersed phase. It was shown that the removal of large particles from suspensions by centrifugation has little effect on its refractive index, but significantly reduces turbidity. It was demonstrated that particle aggregation leads to a decrease of the suspension refractive index, which can be used for express analysis of stability of aqueous suspensions of diamond particles.

KW - Detonation diamond

KW - Dynamic light scattering

KW - Electro-optical effect

KW - Refractive index

KW - Static light scattering

KW - Suspensions

KW - Turbidity

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U2 - 10.1016/j.colsurfa.2017.10.072

DO - 10.1016/j.colsurfa.2017.10.072

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EP - 422

JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects

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