Honeycomb-Structured Microporous Films Made from Hyperbranched Polymers by the Breath Figure Method
writer：Dong, W. Y.; Zhou, Y. F.; Yan, D. Y.*; Mai, Y. Y.; He, L.; Jin, C.
keywords：Honeycomb-Structured Microporous Films,Hyperbranched Polymers,Breath Figure Method
source：期刊
specific source：Langmuir 2009, 25, 173. http://pubs.acs.org/doi/pdf/10.1021/la802863m
Issue time：2008年
Honeycomb-structured microporous films were self-assembled from a new
type of multiarm copolymer, hyperbranched
poly(3-ethyl-3-oxetanemethanol)-star-polystyrene (HBPO-star-PS).
The precursor consisting of an HBPO core and a number of PS arms was
synthesized by reversible addition fragmentation chain transfer (RAFT)
polymerization. The microporous film was prepared by the evaporation of a
chloroform solution of the precursor in a humid atmosphere (the
so-called breath figure method). Compared to our former work, the
hexagonally packed pores in the film were not interpenetrated and
isolated from one another by the walls. The size of the pores could be
controlled easily by changing the casting volume of the solution, the
molecular weight and concentration of the polymer, and so forth. The
water contact angle on the film surface indicated that the
hydrophobicity of the film surface was significantly enhanced as a
result of the formation of the porous structure.