Particle dynamics and relaxation in bimodal suspensions during drying using multispeckle diffusing wave spectroscopy

Gwi Jeong Oh, Ji Won Hwang, Ki Wan Bong, Hyun Wook Jung, Seong Jae Lee

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The motion of polystyrene particles in a bimodal suspension drop during drying was characterized via multispeckle diffusing wave spectroscopy. The fast and slow dynamics of bimodal particles, which were expressed in terms of autocorrelation function data from two kinds of cameras, were well connected in short and long lag time regimes. Characteristic time of β-relaxation, representing the rapid movement of bimodal particles, became lower in the short lag time region as the portion of small particles increased, reflecting their fast Brownian motion. The difference in the relaxation features between bimodal suspension with large and small particles and unimodal suspension with only large particles became more evident as the size ratio between particles was high. Drying temperature could encourage the particle movement at the early stages of drying, leading to lower relaxation time, and inversely retard the relaxation behavior when drying time further elapsed, due to the structural rearrangement of particles.

Original languageEnglish
Pages (from-to)1114-1121
Number of pages8
JournalAICHE Journal
Volume63
Issue number3
DOIs
Publication statusPublished - 2017 Mar 1

Fingerprint

Spectrum Analysis
Suspensions
Drying
Spectroscopy
Brownian movement
Polystyrenes
Autocorrelation
Relaxation time
Cameras
Temperature

Keywords

  • autocorrelation function
  • bimodal PS particles
  • characteristic relaxation time
  • multispeckle diffusing wave spectroscopy
  • suspension drying
  • α-relaxation
  • β-relaxation

ASJC Scopus subject areas

  • Biotechnology
  • Environmental Engineering
  • Chemical Engineering(all)

Cite this

Particle dynamics and relaxation in bimodal suspensions during drying using multispeckle diffusing wave spectroscopy. / Oh, Gwi Jeong; Hwang, Ji Won; Bong, Ki Wan; Jung, Hyun Wook; Lee, Seong Jae.

In: AICHE Journal, Vol. 63, No. 3, 01.03.2017, p. 1114-1121.

Research output: Contribution to journalArticle

@article{6794c68d510e433aa651657bb91e74df,
title = "Particle dynamics and relaxation in bimodal suspensions during drying using multispeckle diffusing wave spectroscopy",
abstract = "The motion of polystyrene particles in a bimodal suspension drop during drying was characterized via multispeckle diffusing wave spectroscopy. The fast and slow dynamics of bimodal particles, which were expressed in terms of autocorrelation function data from two kinds of cameras, were well connected in short and long lag time regimes. Characteristic time of β-relaxation, representing the rapid movement of bimodal particles, became lower in the short lag time region as the portion of small particles increased, reflecting their fast Brownian motion. The difference in the relaxation features between bimodal suspension with large and small particles and unimodal suspension with only large particles became more evident as the size ratio between particles was high. Drying temperature could encourage the particle movement at the early stages of drying, leading to lower relaxation time, and inversely retard the relaxation behavior when drying time further elapsed, due to the structural rearrangement of particles.",
keywords = "autocorrelation function, bimodal PS particles, characteristic relaxation time, multispeckle diffusing wave spectroscopy, suspension drying, α-relaxation, β-relaxation",
author = "Oh, {Gwi Jeong} and Hwang, {Ji Won} and Bong, {Ki Wan} and Jung, {Hyun Wook} and Lee, {Seong Jae}",
year = "2017",
month = "3",
day = "1",
doi = "10.1002/aic.15437",
language = "English",
volume = "63",
pages = "1114--1121",
journal = "AICHE Journal",
issn = "0001-1541",
publisher = "American Institute of Chemical Engineers",
number = "3",

}

TY - JOUR

T1 - Particle dynamics and relaxation in bimodal suspensions during drying using multispeckle diffusing wave spectroscopy

AU - Oh, Gwi Jeong

AU - Hwang, Ji Won

AU - Bong, Ki Wan

AU - Jung, Hyun Wook

AU - Lee, Seong Jae

PY - 2017/3/1

Y1 - 2017/3/1

N2 - The motion of polystyrene particles in a bimodal suspension drop during drying was characterized via multispeckle diffusing wave spectroscopy. The fast and slow dynamics of bimodal particles, which were expressed in terms of autocorrelation function data from two kinds of cameras, were well connected in short and long lag time regimes. Characteristic time of β-relaxation, representing the rapid movement of bimodal particles, became lower in the short lag time region as the portion of small particles increased, reflecting their fast Brownian motion. The difference in the relaxation features between bimodal suspension with large and small particles and unimodal suspension with only large particles became more evident as the size ratio between particles was high. Drying temperature could encourage the particle movement at the early stages of drying, leading to lower relaxation time, and inversely retard the relaxation behavior when drying time further elapsed, due to the structural rearrangement of particles.

AB - The motion of polystyrene particles in a bimodal suspension drop during drying was characterized via multispeckle diffusing wave spectroscopy. The fast and slow dynamics of bimodal particles, which were expressed in terms of autocorrelation function data from two kinds of cameras, were well connected in short and long lag time regimes. Characteristic time of β-relaxation, representing the rapid movement of bimodal particles, became lower in the short lag time region as the portion of small particles increased, reflecting their fast Brownian motion. The difference in the relaxation features between bimodal suspension with large and small particles and unimodal suspension with only large particles became more evident as the size ratio between particles was high. Drying temperature could encourage the particle movement at the early stages of drying, leading to lower relaxation time, and inversely retard the relaxation behavior when drying time further elapsed, due to the structural rearrangement of particles.

KW - autocorrelation function

KW - bimodal PS particles

KW - characteristic relaxation time

KW - multispeckle diffusing wave spectroscopy

KW - suspension drying

KW - α-relaxation

KW - β-relaxation

UR - http://www.scopus.com/inward/record.url?scp=85028249586&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85028249586&partnerID=8YFLogxK

U2 - 10.1002/aic.15437

DO - 10.1002/aic.15437

M3 - Article

AN - SCOPUS:85028249586

VL - 63

SP - 1114

EP - 1121

JO - AICHE Journal

JF - AICHE Journal

SN - 0001-1541

IS - 3

ER -