Surface energy gradient driven convection for generating nanoscale and microscale patterned polymer films using photosensitizers

2014 ◽  
Vol 52 (18) ◽  
pp. 1195-1202 ◽  
Author(s):  
Chae Bin Kim ◽  
Dustin W. Janes ◽  
Dana L. McGuffin ◽  
Christopher J. Ellison
Keyword(s):  
Surface Energy ◽  
Polymer Films ◽  
Energy Gradient

Generating Large Thermally Stable Marangoni-Driven Topography in Polymer Films by Stabilizing the Surface Energy Gradient

2017 ◽  
Vol 50 (11) ◽  
pp. 4588-4596 ◽  
Author(s):  
Amanda R. Jones ◽  
Chae Bin Kim ◽  
Sunshine X. Zhou ◽  
Heonjoo Ha ◽  
Reika Katsumata ◽  
...  
Keyword(s):  
Surface Energy ◽  
Polymer Films ◽  
Thermally Stable ◽  
Energy Gradient

scholarly journals Vertical Orientation of Liquid Crystal on 4-n-Alkyloxyphenoxymethyl-Substituted Polystyrene Containing Liquid Crystal Precursor

Polymers ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 736
Author(s):  
Kyutae Seo ◽  
Hyo Kang
Keyword(s):  
Molecular Structure ◽  
Liquid Crystal ◽  
Surface Energy ◽  
Polymer Films ◽  
Ultraviolet Irradiation ◽  
Molar Fraction ◽  
Side Chain ◽  
Polymer Modification ◽  
Vertical Orientation ◽  
Surface Energies

We synthesized a series of polystyrene derivatives that were modified with precursors of liquid crystal (LC) molecules, such as 4-ethyloxyphenol (homopolymer PEOP and copolymer PEOP#; # = 20, 40, 60, and 80, where # indicates the molar fraction of 4-ethyloxyphenoxymethyl in the side chain), 4-n-butyloxyphenol (PBOP), 4-n-hexyloxyphenol (PHOP), and 4-n-octyloxyphenol (POOP), via polymer modification reaction to investigate the orientation of LC molecules on polymer films, exhibiting part of the LC molecular structure. LC molecules showed a stable and uniform vertical orientation in LC cells fabricated with polymers that have 4-ethyloxyphenoxymethyl in the range of 40–100 mol%. In addition, similar results were obtained in LC cells fabricated with homopolymers of PEOP, PBOP, PHOP, and POOP. The vertical orientation of LC molecules in LC cells fabricated with polymer films correlated to the surface energy of polymer films. For example, vertical LC orientation was observed when the total surface energies of the polymer films were lower than approximately 43.2 mJ/m2. Good alignment stabilities were observed at 150 °C and 20 J/cm2 of ultraviolet irradiation for LC cells fabricated with PEOP film.

Pattern-directed to isotropic dewetting transition in polymer films on micropatterned surfaces with differential surface energy contrast

Soft Matter ◽  
2007 ◽  
Vol 3 (5) ◽  
pp. 613 ◽  
Author(s):  
Duangrut Julthongpiput ◽  
Wenhua Zhang ◽  
Jack F. Douglas ◽  
Alamgir Karim ◽  
Michael J. Fasolka
Keyword(s):  
Surface Energy ◽  
Polymer Films

scholarly journals Self-replenishing ability of cross-linked low surface energy polymer films investigated by a complementary experimental-simulation approach

2014 ◽  
Vol 140 (12) ◽  
pp. 124902 ◽  
Author(s):  
A. C. C. Esteves ◽  
K. Lyakhova ◽  
J. M. van Riel ◽  
L. G. J. van der Ven ◽  
R. A. T. M. van Benthem ◽  
...  
Keyword(s):  
Surface Energy ◽  
Polymer Films ◽  
Experimental Simulation ◽  
Simulation Approach ◽  
Low Surface Energy

Condensation on Surface Energy Gradient Shifts Drop Size Distribution toward Small Drops

Langmuir ◽  
2014 ◽  
Vol 30 (7) ◽  
pp. 1788-1798 ◽  
Author(s):  
Ashley M. Macner ◽  
Susan Daniel ◽  
Paul H. Steen
Keyword(s):  
Surface Energy ◽  
Size Distribution ◽  
Drop Size ◽  
Drop Size Distribution ◽  
Energy Gradient

Structure of Molecularly -Thin Perfluoropolyether Films on Amorphous Carbon Surfaces

1998 ◽  
Vol 517 ◽  
Author(s):  
G.W. Tyndall ◽  
R.J. Waltman
Keyword(s):  
Surface Energy ◽  
Amorphous Carbon ◽  
Polymer Films ◽  
Energy Data ◽  
Surface Energies ◽  
Carbon Surfaces ◽  
Adhesive Interactions ◽  
Perfluoropolyether Films ◽  
Underlying Substrate

AbstractSurface energies of molecularly-thin, perfluoropolyether (PFPE)-lubricated, amorphous carbon surfaces are presented as a function of the applied PFPE structure and thickness. A framework is developed to aid in the interpretation of the surface energy data. Information regarding the structure of these PFPE films adsorbed on CHx at the monolayer thickness levels is elucidated. Evidence for ordering in these polymer films is presented and interpreted to result from a combination of both, lateral cohesive interactions within the plane of the monolayer, and adhesive interactions between the PFPE monolayer and the underlying substrate.

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