|
|||||
|
|
Monitoring of Vapor-Induced Phase Separation during Spin Coating of PVDF by Optical Scattering |
|
| Authors: | Noel M Dawson Phillip M Atencio Kevin J Malloy |
| Institution: | 1. Center for High Technology Materials , University of New Mexico , Albuquerque , New Mexico , USA;2. Nanoscience and Microsystems Engineering Program , University of New Mexico , Albuquerque , New Mexico , USA;3. Mechanical Engineering Department , University of New Mexico , Albuquerque , New Mexico , USA;4. Nanoscience and Microsystems Engineering Program , University of New Mexico , Albuquerque , New Mexico , USA;5. Physics and Astronomy Department , University of New Mexico , Albuquerque , New Mexico , USA |
| Abstract: | Solutions of poly(vinylidene fluoride) (PVDF) and dimethyl sulfoxide (DMSO) were spin cast under varying relative humidity environments. To elucidate film formation mechanisms, in situ optical scattering was used to monitor the physical processes occurring during spin coating. SEM micrographs and optical scattering taken together show that vapor-induced phase separation (VIPS) is a process that controls morphology during spin coating. Time periods were identified in the optical scattering patterns allowing for real time identification of phase separation for greater process control. |
| Keywords: | Optical monitoring Phase seperation PVDF Spin coating VIPS |