The breath figure arrays (BFAs) is one of methods to make the porous membrane, using the hydrophilic polymers and controlling solvent evaporation so as to reduce surface temperature of the material resulting in the condensation of water vapor on the surface of the material and then forming the porous membrane. According to previous studies, the cross-sectional view in the BFAs membrane usually shows spherical-like structure.<br/>In this study, a series of diacetylene-labeled polystyrene were used to fabricate the BFAs membrane under atmospheres. By taking advantage of diacetylene moietiey, ordered and high-aspect-ratio breath-figured cylindrical arrays can be obtained by dynamic breath figured process (Figure 1a). Also, the formation of spherical-like pores can be observed inside the film under lower air flash rate (Figure 1b).<br/>Figure 1. Cross-sectional SEM images of the self-assembled thin film by drop-casting from 5 wt% of PS-diacetylene solution in dichoromethane under (a) higher air flash rate (b) lower air flash rate.<br/>

Breath figure method for construction of high-aspect-ratio pores using diacetylene-labeled polystyrene

256th National Meeting (2018)

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