TY - JOUR
T1 - Effects of hypergravity on formation of microporous films by dissipative processes
AU - Yabu, Hiroshi
AU - Hirai, Yuji
AU - Shimomura, Masatsugu
AU - Natsuisaka, Makoto
AU - Tsujii, Kaoru
PY - 2010/11/1
Y1 - 2010/11/1
N2 - Microporous polymer films can be prepared by casting a solution of hydrophobic polymer and amphiphilic polymer on a solid substrate using condensed water droplet arrays as templates. Bacause of the temperature nonuniformity of the solution surface owing to thermal convections, water condenses heterogeneously. The heterogeneous condensation of water droplets induces the formation of irregular-size and -arrangement microporous film. To evaluate the effect of gravity on microporous film formation, we have successfully prepared the test chamber for hypergravity experiments. From the hypergravity experiment, the thermal convection during solvent evaporation was forced to be enhanced under hypergravity. As a result, the microporous structure was not observed under hypergravity. These results provided insight on water-assisted microporous film formation. Furthermore, the results strongly suggested that the microgravity enviroment is suitable for uniform and wellorganized microporous film formation.
AB - Microporous polymer films can be prepared by casting a solution of hydrophobic polymer and amphiphilic polymer on a solid substrate using condensed water droplet arrays as templates. Bacause of the temperature nonuniformity of the solution surface owing to thermal convections, water condenses heterogeneously. The heterogeneous condensation of water droplets induces the formation of irregular-size and -arrangement microporous film. To evaluate the effect of gravity on microporous film formation, we have successfully prepared the test chamber for hypergravity experiments. From the hypergravity experiment, the thermal convection during solvent evaporation was forced to be enhanced under hypergravity. As a result, the microporous structure was not observed under hypergravity. These results provided insight on water-assisted microporous film formation. Furthermore, the results strongly suggested that the microgravity enviroment is suitable for uniform and wellorganized microporous film formation.
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U2 - 10.1143/JJAP.49.110210
DO - 10.1143/JJAP.49.110210
M3 - Article
AN - SCOPUS:79551616166
VL - 49
JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
SN - 0021-4922
IS - 11
M1 - 110210
ER -