Modeling Solution Drying by Moving a Liquid-Vapor Interface: Method and Applications
- Virginia Polytechnic Institute and State University (Virginia Tech), Blacksburg, VA (United States)
- Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
A method of simulating the drying process of a soft matter solution with an implicit solvent model by moving the liquid-vapor interface is applied to various solution films and droplets. For a solution of a polymer and nanoparticles, we observe “polymer-on-top” stratification, similar to that found previously with an explicit solvent model. Furthermore, “polymer-on-top” is found even when the nanoparticle size is smaller than the radius of gyration of the polymer chains. For a suspension droplet of a bidisperse mixture of nanoparticles, we show that core-shell clusters of nanoparticles can be obtained via the “small-on-outside” stratification mechanism at fast evaporation rates. “Large-on-outside” stratification and uniform particle distribution are also observed when the evaporation rate is reduced. Polymeric particles with various morphologies, including Janus spheres, core-shell particles, and patchy particles, are produced from drying droplets of polymer solutions by combining fast evaporation with a controlled interaction between the polymers and the liquid-vapor interface. Our results validate the applicability of the moving interface method to a wide range of drying systems. The limitations of the method are pointed out and cautions are provided to potential practitioners on cases where the method might fail.
- Research Organization:
- Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Organization:
- National Science Foundation (NSF); USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC)
- Grant/Contract Number:
- AC02-05CH11231; NA0003525
- OSTI ID:
- 1894608
- Report Number(s):
- SAND2022-13640J; 710521
- Journal Information:
- Polymers, Journal Name: Polymers Journal Issue: 19 Vol. 14; ISSN 2073-4360
- Publisher:
- MDPICopyright Statement
- Country of Publication:
- United States
- Language:
- English
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