利用呼吸图案法制备聚(苯乙烯-b-丙烯腈)有序多孔薄膜

doi:10.3866/PKU.WHXB201303112

Abstract

Abstract:

Ordered porous films were prepared by the breath figure method based on self-synthetic polystyrene-b-polyacrylonitrile (PS-b-PAN). Their morphologies were characterized by scanning electron microscopy. The influence of polymer concentration, solvent, and polymer structure on the structures of porous films was investigated. Film surfaces were covered with round hexagonally packed pores, and a honeycomb structure resided under film surfaces. With increasing polymer concentration in the chloroform (CHCl₃) solvent, pore spacing increased and the size of honeycomb structure decreased. Multilayer structures were observed at higher concentration. When better volatile carbon disulfide (CS₂) was instead used as the solvent, even highly ordered porous films were produced. Pore diameter and pore spacing increased, and the size of the honeycomb structure decreased. When the polystyrene macro-initiator (PS-Cl) without PAN blocks was adopted as the film material, nest-like structures instead of pores were formed on the film surface. The halo on the film surface suggests that when water droplets were positioned under the liquid film, defects formed on the film surface.

Key words: Polystyrene, Block copolymer, Breath figure method, Porous film, Defect, Honeycomb structure

TANG Lin, MA Xiao-Yan,, SONG Ying, ZHOU Dong. Ordered Porous Films Prepared by the Breath Figure Method Based on Polystyrene-b-polyacrylonitrile[J]. Acta Phys. -Chim. Sin. 2013, 29(05), 1107-1114. doi: 10.3866/PKU.WHXB201303112

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Ordered Porous Films Prepared by the Breath Figure Method Based on Polystyrene-b-polyacrylonitrile

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