Analysis of the drying behavior of suspension drops with spherical and ellipsoidal particles

Park, Baek Sung; Ahn, Won Gi; Jung, Kevin Injoe; Lee, Seong Jae; Lee, Kwan Young; Jung, Hyun Wook

doi:10.1080/07373937.2018.1433684

Cited by 6 publications

(3 citation statements)

References 41 publications

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“…Moreover, when the correlation function decreased to 0.6, the characteristic times for β-relaxation dynamics in the given suspension cases were compared at all drying times. Additional details of the operation and conditions of MSDWS test are described in previous studies [ 28 , 33 , 36 , 38 ].…”

Section: Methodsmentioning

confidence: 99%

“…Diffusing wave spectroscopy (DWS) is a practical method used to measure particle motions in terms of mean square displacement (MSD) and rheological properties at high frequencies in dense suspension systems [ 34 , 35 ]. In addition, multispeckle diffusing wave spectroscopy (MSDWS) is utilized to monitor the fast motion of particles in nonergodic particulate suspensions, such as gelation, drying, and curing [ 36 , 37 , 38 , 39 ].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Immiscible Secondary Fluid on Particle Dynamics and Coffee Ring Characteristics during Suspension Drying

et al. 2020

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Particle motion and coffee ring patterns in water-borne suspensions of polystyrene (PS) particle added with small amounts of secondary hydrophobic decalin are investigated during the drying of the suspension droplets, mainly employing light scattering methods. Very tiny secondary fluid insertions via high-speed agitation effectively link the particles through hydrophobic dissolution leading to the formation of multimodal particulate clusters, with resistance to the outward capillary flow and suppression of coffee ring formation after drying. The impact of decalin on particles is corroborated by actual images acquired from an optical profiler and a scanning electron microscope (SEM). The average particle motion inside the suspension changed by decalin was expressed in terms of mean square displacement (MSD) based on diffusing wave spectroscopy (DWS). Employing multispeckle diffusing wave spectroscopy (MSDWS), the rapid motion or -relaxation of particles in various suspensions with and without decalin is quantified in early lag time during the drying of droplets. The change in particle dynamics during suspension drop drying, when adding a small secondary fluid, plays a key role in tuning coffee ring patterns.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Immiscible Secondary Fluid on Particle Dynamics and Coffee Ring Characteristics during Suspension Drying

et al. 2020

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“…For practical applications, manipulation of the drying conditions is necessary to suppress or enhance the coffee-ring effect. Therefore, several studies have focused on ways to effectively suppress the coffee-ring effect of suspension droplets, such as changing the shape of the particles, − adding hydrosoluble-polymer additives, , and inducing Marangoni flow using a concentration or temperature-driven surface tension gradient on the droplet surface. − In addition, drying at high temperatures can effectively obtain more uniform droplet patterns owing to the interface capture effect . Recently, ingenious strategies to control relative humidity and evaporation rate using lids have been introduced to achieve uniform particle deposits.…”

Section: Introductionmentioning

confidence: 99%

Light-Scattering Analysis of Drying Behavior in Suspension Droplets with Silica and Polystyrene Particles and a Hydrosoluble Polymer

Lee,

Kim,

Lee

et al. 2023

Langmuir

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The coffee-ring structure, which is the final drying pattern of a sessile suspension droplet, is a key factor in controlling the uniformity of the particulate deposits in various coatings. Two light-scattering methods, diffusing wave spectroscopy (DWS) and multispeckle DWS (MSDWS), were used to quantitatively distinguish temporal changes in particle mobility in evaporating suspension droplets containing micrometer-sized silica and polystyrene (PS) particles. The characteristic particle mobility was measured in terms of the mean square displacement in the early stage of drying, and the local particle dynamics around the edge and center regimes of the droplets during drying were analyzed using MSDWS. Hydroxyethyl cellulose (HEC), a hydrosoluble polymer, was added to the silica and PS suspensions to further investigate its role in suppressing or enhancing coffee-ring patterns based on particle−polymer interactions. Consequently, dried microstructures can be directly correlated with real-time drying dynamics, as well as the interactions between solutes by comprehensive light-scattering methods.

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Rheological and light scattering analyses for characterizing phase separation of polymer solutions in lithium-ion battery separator coating system

Lee,

Kim,

Park

et al. 2024

Korea-Aust. Rheol. J.

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Analysis of the drying behavior of suspension drops with spherical and ellipsoidal particles

Cited by 6 publications

References 41 publications

Effect of Immiscible Secondary Fluid on Particle Dynamics and Coffee Ring Characteristics during Suspension Drying

Effect of Immiscible Secondary Fluid on Particle Dynamics and Coffee Ring Characteristics during Suspension Drying

Light-Scattering Analysis of Drying Behavior in Suspension Droplets with Silica and Polystyrene Particles and a Hydrosoluble Polymer

Rheological and light scattering analyses for characterizing phase separation of polymer solutions in lithium-ion battery separator coating system

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