1
|
Lee Y, Kim SH, Lee SJ, Bang J, Jung HW. Light-Scattering Analysis of Drying Behavior in Suspension Droplets with Silica and Polystyrene Particles and a Hydrosoluble Polymer. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:17222-17231. [PMID: 37976431 DOI: 10.1021/acs.langmuir.3c02280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2023]
Abstract
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.
Collapse
Affiliation(s)
- Yewon Lee
- Department of Chemical and Biological Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Seong Hwan Kim
- Department of Chemical and Biological Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Seong Jae Lee
- Department of Polymer Engineering, The University of Suwon, Hwaseong, Gyeonggi 18323, Republic of Korea
| | - Joona Bang
- Department of Chemical and Biological Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Hyun Wook Jung
- Department of Chemical and Biological Engineering, Korea University, Seoul 02841, Republic of Korea
| |
Collapse
|
2
|
Rheological behavior and drying characteristics of ceria-based suspensions under various pH conditions. POWDER TECHNOL 2022. [DOI: 10.1016/j.powtec.2022.117984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
3
|
Park BS, Jung KI, Lee SJ, Lee KY, Jung HW. Effect of particle shape on drying dynamics in suspension drops using multi-speckle diffusing wave spectroscopy. Colloid Polym Sci 2018. [DOI: 10.1007/s00396-018-4315-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
4
|
Pérez AJ, González-Peña RJ, Braga R, Perles Á, Pérez-Marín E, García-Diego FJ. A Portable Dynamic Laser Speckle System for Sensing Long-Term Changes Caused by Treatments in Painting Conservation. SENSORS 2018; 18:s18010190. [PMID: 29324692 PMCID: PMC5795523 DOI: 10.3390/s18010190] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Revised: 01/05/2018] [Accepted: 01/09/2018] [Indexed: 11/17/2022]
Abstract
Dynamic laser speckle (DLS) is used as a reliable sensor of activity for all types of materials. Traditional applications are based on high-rate captures (usually greater than 10 frames-per-second, fps). Even for drying processes in conservation treatments, where there is a high level of activity in the first moments after the application and slower activity after some minutes or hours, the process is based on the acquisition of images at a time rate that is the same in moments of high and low activity. In this work, we present an alternative approach to track the drying process of protective layers and other painting conservation processes that take a long time to reduce their levels of activity. We illuminate, using three different wavelength lasers, a temporary protector (cyclododecane) and a varnish, and monitor them using a low fps rate during long-term drying. The results are compared to the traditional method. This work also presents a monitoring method that uses portable equipment. The results present the feasibility of using the portable device and show the improved sensitivity of the dynamic laser speckle when sensing the long-term process for drying cyclododecane and varnish in conservation.
Collapse
Affiliation(s)
- Alberto J Pérez
- Dep. d'Informàtica de Sistemes i Computadors (DISCA), Universitat Politècnica de València, 46022 Valencia, Spain.
| | - Rolando J González-Peña
- Dep. Fisiología. Unidad de Biofísica y Física Médica. Facultad de Medicina y Odontología, Universitat de València, 46010 Valencia, Spain.
| | - Roberto Braga
- Dep. Engenharia (DEG), Universidade Federal de Lavras (UFLA), 3037 Lavras, Brazil.
| | - Ángel Perles
- Dep. d'Informàtica de Sistemes i Computadors (DISCA), Universitat Politècnica de València, 46022 Valencia, Spain.
- ITACA Institute, Camino de Vera, s/n, 46022 Valencia, Spain.
| | - Eva Pérez-Marín
- Dep. de Conservación y Restauración de Bienes Culturales, Universitat Politècnica de València, 46022 Valencia, Spain.
| | | |
Collapse
|
5
|
Park BS, Hyung KH, Oh GJ, Jung HW. Dynamic Change in Color Filter Layers during the Baking Process by Multi-Speckle Diffusing Wave Spectroscopy. Chem Eng Technol 2017. [DOI: 10.1002/ceat.201700147] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Baek Sung Park
- Korea University; Department of Chemical and Biological Engineering; 145 Anam-ro, Seongbuk-gu 02841 Seoul Republic of Korea
- Samsung SDI; 130 Samsung-ro, Yeongtong-gu, Suwon-si 16678 Gyeonggi-do Republic of Korea
| | - Kyung Hee Hyung
- Samsung SDI; 130 Samsung-ro, Yeongtong-gu, Suwon-si 16678 Gyeonggi-do Republic of Korea
| | - Gwi Jeong Oh
- Korea University; Department of Chemical and Biological Engineering; 145 Anam-ro, Seongbuk-gu 02841 Seoul Republic of Korea
| | - Hyun Wook Jung
- Korea University; Department of Chemical and Biological Engineering; 145 Anam-ro, Seongbuk-gu 02841 Seoul Republic of Korea
| |
Collapse
|
6
|
Moghimi E, Jacob AR, Petekidis G. Residual stresses in colloidal gels. SOFT MATTER 2017; 13:7824-7833. [PMID: 29028062 DOI: 10.1039/c7sm01655g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A combination of experiments and Brownian Dynamics (BD) simulations is utilized to examine internal stresses in colloidal gels brought to rest from steady shear at different shear rates. A model colloidal gel with intermediate volume fraction is chosen where attractions between particles are introduced by adding non-adsorbing linear polymer chains. After flow cessation, the gel releases the stress in two distinct patterns: at high shear rates, where shear forces dominate over attractive forces, the shear-melted gel behaves as a liquid and releases stresses to zero after flow cessation. After low shear rates, though, stresses relax only partially, similar to the response of hard sphere glasses and jammed soft particles. The balance between shear and attractive forces which determines the intensity of structural distortion controls the amplitude of the residual stresses through a universal scaling. Stress decomposition to repulsive and attractive contributions in BD simulations reveals that internal stresses mainly originate from attractive forces. Moreover, analysis of particle dynamics indicates that internal stresses are associated with sub-diffusive particle displacements on average smaller than the attraction range as such short-range displacements are not sufficient to completely erase structural anisotropy caused during the course of shear.
Collapse
Affiliation(s)
- Esmaeel Moghimi
- FORTH/IESL and Department of Materials Science and Technology, University of Crete, 71110 Heraklion, Greece.
| | | | | |
Collapse
|
7
|
van der Kooij HM, Fokkink R, van der Gucht J, Sprakel J. Quantitative imaging of heterogeneous dynamics in drying and aging paints. Sci Rep 2016; 6:34383. [PMID: 27682840 PMCID: PMC5041151 DOI: 10.1038/srep34383] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2016] [Accepted: 09/12/2016] [Indexed: 11/09/2022] Open
Abstract
Drying and aging paint dispersions display a wealth of complex phenomena that make their study fascinating yet challenging. To meet the growing demand for sustainable, high-quality paints, it is essential to unravel the microscopic mechanisms underlying these phenomena. Visualising the governing dynamics is, however, intrinsically difficult because the dynamics are typically heterogeneous and span a wide range of time scales. Moreover, the high turbidity of paints precludes conventional imaging techniques from reaching deep inside the paint. To address these challenges, we apply a scattering technique, Laser Speckle Imaging, as a versatile and quantitative tool to elucidate the internal dynamics, with microscopic resolution and spanning seven decades of time. We present a toolbox of data analysis and image processing methods that allows a tailored investigation of virtually any turbid dispersion, regardless of the geometry and substrate. Using these tools we watch a variety of paints dry and age with unprecedented detail.
Collapse
Affiliation(s)
- Hanne M van der Kooij
- Physical Chemistry and Soft Matter, Wageningen University &Research, Stippeneng 4, 6708 WE Wageningen, The Netherlands.,Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands
| | - Remco Fokkink
- Physical Chemistry and Soft Matter, Wageningen University &Research, Stippeneng 4, 6708 WE Wageningen, The Netherlands
| | - Jasper van der Gucht
- Physical Chemistry and Soft Matter, Wageningen University &Research, Stippeneng 4, 6708 WE Wageningen, The Netherlands
| | - Joris Sprakel
- Physical Chemistry and Soft Matter, Wageningen University &Research, Stippeneng 4, 6708 WE Wageningen, The Netherlands
| |
Collapse
|
8
|
Oh GJ, Hwang JW, Bong KW, Jung HW, Lee SJ. Particle dynamics and relaxation in bimodal suspensions during drying using multispeckle diffusing wave spectroscopy. AIChE J 2016. [DOI: 10.1002/aic.15437] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Gwi Jeong Oh
- Dept. of Chemical and Biological Engineering; Korea University; Seoul 02841 Republic of Korea
| | - Ji Won Hwang
- Dept. of Chemical and Biological Engineering; Korea University; Seoul 02841 Republic of Korea
| | - Ki Wan Bong
- Dept. of Chemical and Biological Engineering; Korea University; Seoul 02841 Republic of Korea
| | - Hyun Wook Jung
- Dept. of Chemical and Biological Engineering; Korea University; Seoul 02841 Republic of Korea
| | - Seong Jae Lee
- Dept. of Polymer Engineering; The University of Suwon; Gyeonggi 18323 Republic of Korea
| |
Collapse
|
9
|
Bouman J, de Vries R, Venema P, Belton P, Baukh V, Huinink HP, van der Linden E. Coating formation during drying of β-lactoglobulin: gradual and sudden changes. Biomacromolecules 2014; 16:76-86. [PMID: 25423040 DOI: 10.1021/bm501549b] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The drying dynamics of protein coatings is of importance for many applications. The main focus of research so far was to investigate macroscopic properties of protein coatings, leaving drying dynamics virtually unexplored. A unique combination of techniques is used to monitor drying of a coating containing the protein β-lactoglobulin. The techniques used cover both macroscopic and microscopic aspects of the drying process. For all water fractions amenable to diffusing wave spectroscopy analysis (xw > 0.2 w/w), the tracer particles diffuse in the coating as in a Newtonian viscous medium. Magnetic resonance imaging shows both protein and water are distributed homogeneously over the coating during drying, up to water fractions above 0.2 w/w. When drying continues to lower water fractions, sudden transitions in drying behavior are observed by both dynamic vapor sorption and IR spectroscopy, which we suggest are due to changes in molecular interactions caused by dehydration of the protein backbone.
Collapse
Affiliation(s)
- Jacob Bouman
- Laboratory of Physical Chemistry and Colloid Science and ‡Laboratory of Physics and Physical Chemistry of Foods, Wageningen University , Wageningen, The Netherlands
| | | | | | | | | | | | | |
Collapse
|
10
|
Lee JY, Hwang JW, Jung HW, Kim SH, Lee SJ, Yoon K, Weitz DA. Fast dynamics and relaxation of colloidal drops during the drying process using multispeckle diffusing wave spectroscopy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:861-866. [PMID: 23281633 DOI: 10.1021/la3046059] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The fast dynamics generated by the Brownian motion of particles in colloidal drops, and the related relaxation during drying, which play key roles in suspension systems, were investigated incorporating multispeckle diffusing wave spectroscopy (MSDWS). MSDWS equipment was implemented to analyze the relaxation properties of suspensions under a nonergodic and nonstationary drying process, which cannot be elucidated by conventional light scattering methods, such as dynamic light scattering and diffusing wave spectroscopy. Rapid particle movement can be identified by the characteristic relaxation time, which is closely related to the Brownian motion due to thermal fluctuations of the particles. In the compacting stage of the drying process, the characteristic relaxation time increased gradually with the drying time because the particles in the colloidal drop were constrained by themselves. Moreover, variations of the initial concentration and particle size considerably affected the complete drying time and characteristic relaxation time, producing a shorter relaxation time for a low concentrated suspension with small particles.
Collapse
Affiliation(s)
- Jeong Yong Lee
- Department of Chemical and Biological Engineering, Korea University, Seoul, Korea
| | | | | | | | | | | | | |
Collapse
|
11
|
Di X, Win KZ, McKenna GB, Narita T, Lequeux F, Pullela SR, Cheng Z. Signatures of structural recovery in colloidal glasses. PHYSICAL REVIEW LETTERS 2011; 106:095701. [PMID: 21405637 DOI: 10.1103/physrevlett.106.095701] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2009] [Revised: 12/03/2010] [Indexed: 05/30/2023]
Abstract
Colloids near the glass concentration are often taken as models for molecular glasses. Yet, an important aspect of the dynamics of molecular glasses, structural recovery, has not been elucidated in colloids. We take advantage of a thermosensitive colloidal suspension to study the structural recovery after concentration jumps by using diffusing wave spectroscopy. The three classical aging signatures observed in molecular glasses are studied and the results are compared with those typical of molecular glasses. For the intrinsic isotherms, unlike molecular glasses, the colloid shows huge changes in relaxation time at equilibrium while the times required to reach the equilibrium state are nearly constant. For asymmetry of approach, we find a similar nonlinearity to that observed in the molecular glasses. For the memory experiment, while a memory effect is seen, the response is qualitatively different from that in molecular glasses.
Collapse
Affiliation(s)
- Xiaojun Di
- Department of Chemical Engineering, Texas Tech University, Lubbock, 79409, USA
| | | | | | | | | | | | | |
Collapse
|
12
|
Doumenc F, Bodiguel H, Guerrier B. Physical aging of glassy PMMA/toluene films: influence of drying/swelling history. THE EUROPEAN PHYSICAL JOURNAL. E, SOFT MATTER 2008; 27:3-11. [PMID: 19230224 DOI: 10.1140/epje/i2008-10345-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Gravimetry experiments in a well-controlled environment have been performed to investigate aging for a glassy PMMA/toluene film. The temperature is constant and the control parameter is the solvent vapor pressure above the film (i.e. the activity). Several experimental protocols have been used, starting from a high activity where the film is swollen and rubbery and then aging the film at different activities below the glass transition. Desorption and resorption curves have been compared for the different protocols, in particular in terms of the softening time, i.e. the time needed by the sample to recover an equilibrium state at high activity. Non-trivial behaviors have been observed, especially at small activities (deep quench). A model is proposed, extending the Leibler-Sekimoto approach to take into account the structural relaxation in the glassy state, using the Tool formalism. This model well captures some of the observed phenomena, but fails in describing the specific kinetics observed when aging is followed by a short but deep quench.
Collapse
Affiliation(s)
- F Doumenc
- Université Pierre et Marie Curie-Paris 6, Université Paris-Sud, CNRS, Laboratoire FAST, F-91405, France.
| | | | | |
Collapse
|
13
|
König AM, Weerakkody TG, Keddie JL, Johannsmann D. Heterogeneous drying of colloidal polymer films: dependence on added salt. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:7580-7589. [PMID: 18563885 DOI: 10.1021/la800525n] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Using magnetic resonance profiling coupled with dynamic light scattering, we have investigated the mechanisms leading to the formation of a partly coalesced surface layer, or "open skin", during film formation from waterborne polymer dispersions. We present the first use of the skewness of the distribution of free water as a model-free indicator of the spatial nonuniformity of drying. The skewness reaches a maximum at the same time at which a strong, static component, presumably originating from a skin at the film/air interface, appears in the light scattering data. Addition of salt to the dispersion increases both the skewness of the distribution of free water and the propensity for skin formation. Surprisingly, the drying is influenced not only by the concentration and valency of the ions in the salt but also by the particular ion. At intermediate particle densities, added salt strongly lowers the cooperative diffusion coefficient, Dcoop. When the particles reach close packing, Dcoop sharply increases. If the particles readily coalesce, the effects of the increased diffusivity will be counteracted, thereby inducing the formation of a skin. A modified Peclet number, Pe, using Dcoop, is proposed, so that the presence of salt is explicitly considered. This modified Pe is able to predict the nonuniformity in drying that leads to skin formation.
Collapse
Affiliation(s)
- Alexander M König
- Institute of Physical Chemistry, Clausthal University of Technology, Arnold-Sommerfeld-Str. 4, D-38678 Clausthal-Zellerfeld, Germany
| | | | | | | |
Collapse
|
14
|
Convectional, sedimentation and drying dissipative patterns of colloidal crystals of poly(methyl methacrylate) spheres on a watch glass. Colloid Polym Sci 2008. [DOI: 10.1007/s00396-008-1898-7] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
15
|
Okubo T, Okamoto J, Tsuchida A. Convectional, sedimentation, and drying dissipative patterns of colloidal crystals of poly (methyl methacrylate) spheres on a cover glass. Colloid Polym Sci 2008. [DOI: 10.1007/s00396-008-1874-2] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
16
|
Sedimentation and drying dissipative patterns of ternary mixtures of colloidal silica spheres having different sizes. Colloid Polym Sci 2008. [DOI: 10.1007/s00396-008-1852-8] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
17
|
Sedimentation and drying dissipative patterns of binary suspensions of colloidal silica spheres having different sizes. Colloid Polym Sci 2007. [DOI: 10.1007/s00396-007-1778-6] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
18
|
Okubo T. Sedimentation and drying dissipative patterns of colloidal silica (560 nm in diameter) suspensions in a glass dish and a watch glass. Colloid Polym Sci 2007. [DOI: 10.1007/s00396-007-1715-8] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
19
|
Narita T, Hébraud P, Lequeux F. Effects of the rate of evaporation and film thickness on nonuniform drying of film-forming concentrated colloidal suspensions. THE EUROPEAN PHYSICAL JOURNAL. E, SOFT MATTER 2005; 17:69-76. [PMID: 15864729 DOI: 10.1140/epje/i2004-10109-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2004] [Accepted: 03/01/2005] [Indexed: 05/02/2023]
Abstract
In this paper, we report on nonuniform distribution of film-forming waterborne colloidal suspensions above the critical concentration phi(c) of the colloidal glass transition during drying. We found that colloidal suspension films dry nonuniformly when the initial rate of evaporation E and/or the initial thickness l(0) are high. We found that a Peclet number Pe, defined as Pe = El(0)/D, where D is the diffusion coefficient of the colloids in the diluted suspensions, does not predict uniformity of drying of the concentrated suspensions, contrary to the reported work on drying of diluted suspensions. Since the colloidal particles are crowded and their diffusive motion is restricted in concentrated suspensions, we assumed that above phi(c) water is transported to the drying surface by hydrodynamic flow along the osmotic pressure gradient. The permeability of water through channels between deforming particles is estimated by adapting the theory of foam drainage. We defined a new Peclet number Pe' by substituting the transport coefficient of flow (defined as the permeability divided by the viscosity, multiplied by the osmotic pressure gradient) for the diffusion coefficient. This extended Peclet number predicted the nonuniform drying with a criterion of Pe' > 1. These results indicate that the mechanism of water transport to the drying surface in concentrated suspensions is water permeation by osmotic pressure, which is faster than mutual diffusion between water and particles --that has been observed in diluted suspensions and discussed by Routh and Russel. The theory fits well the experimental drying curves for various thicknesses and rates of evaporation. The particle distribution in the drying films is also estimated and it is indicated that the latex distribution is nonuniform when Pe' > 1.
Collapse
Affiliation(s)
- T Narita
- CNRS-UMR7615 Physico-Chimie des Polymères et des Milieux Dispersés, ESPCI, 10 rue Vauquelin, 75231, Paris cedex 05, France.
| | | | | |
Collapse
|