Fabrication of Robust Micro-patterned Polymeric Films via Static Breath Figure Process and Vulcanization
writer：Lei Li, Yawen Zhong, Jianliang Gong, Jian Li, Jin Huang, Zhi Ma
keywords：breath figure, porous film
source：期刊
Issue time：2010年
Here, we present the preparation of thermally stable and solvent resistant micro-patterned polymeric ?lms via static breath-?gure process and sequent vulcanization, with a commercially available triblock polymer, polystyrene-b-polyisoprene-b-polystyrene (SIS). The vulcanized honeycomb structured SIS ?lms became self-supported and resistant to a wide range of organic solvents and thermally stable up to 350 C for 2 h, an increase of more than 300 K as compared to the uncross-linked ?lms. This superior robustness could be attributed to the high degree of polyisoprene cross-linking. The versatility of the methodology was demonstrated by applying to another commercially available triblock polymer, polystyrene-b-polybutadiene-b-polystyrene (SBS). Particularly, hydroxy groups were introduced into SBS by hydroboration. The functionalized two-dimensional micro-patterns feasible for site-directed grafting were created by the hydroxyl-containing polymers. In addition, the ?xed microporous structures could be replicated to fabricate textured positive PDMS stamps. This simple technique offers new prospects in the ?eld of micro-patterns, soft lithography and templates.