Microstructuring of Polystyrene Films by Template-Leaching Technique

Meng Meng Xue; Guang Fen Li

doi:10.4028/www.scientific.net/AMR.538-541.120

Paper Titles

Annealing Effects on W-Doped VO₂ Thin Films Prepared from Magnetron Sputtering
p.101

Properties of Vanadium Oxide Films Prepared by DC Reactive Magnetron Sputtering at Different Oxygen Partial Pressures
p.105

Simulation of Ion Distribution on both Sides of Insulation Film in Saltwater under Static Electric Field
p.110

The Difference between Microstructures and Optical Properties of Pb_1-xGe_xTe Thin Films Evaporated Using Electron Beam and Resistance Heating Respectively
p.116

Microstructuring of Polystyrene Films by Template-Leaching Technique
p.120

Carbon Nitride Films Prepared by PECVD in CH₄-NH₃ Precursor
p.124

Preparation of the Reed Cellulose Membrane by Using NMMO Method
p.128

The Structure and Frictional Properties of Aluminum Alloy Anodic Oxide Film
p.132

The Anti-Oxidation Properties of MoS₂/Sb₂O₃ Films
p.136

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Microstructuring of Polystyrene Films by Template-Leaching Technique

Abstract:

In this study, porous polystyrene membranes were prepared by a template-leaching technique. A suspension was first prepared by dispersing both polystyrene and starch in toluene, in which starch was used as leachable component. The weight ratio of starch/polystyrene ranged from 1:1, 1:2 to 1:3, whereas the concentration of the suspensions altered from 1%, 3%, to 5% by weight of polystyrene/toluene. After spin-coating the prepared suspension on the glass substrate, polystyrene/starch thin-film was produced, and then was treated with inorganic acid to remove starch components. The porous films with ordered and homogeneous structures were resulted. Analysis by contact angle measurement, scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy analysis (FTIR) show that the microstructures on the porous films were affected by many experimental factors during the formation of thin-film and the following leaching process. Especially the type of the inorganic acid such as HCl, H2SO4, or HNO3, and the concentration of the specific acid selected in the leaching process have dramatic influences on the formation of the porous polystyrene membrane. The results further demonstrated that starch particles can be maximally removed when the films were immersed into the aqueous solution of HNO3.