应浙江大学高分子系邀请，韩国浦项科技大学的Jin-Kon Kim教授来我校访问并举行学术报告。
报告题目：New Functional Nanomaterials Based on Block Copolymers
报告人：Prof. Jin-Kon Kim, Department of Chemical Engineering, Director of National Creativity Research Initiative Program for Block Copolymer Self-Assembly, Pohang University of Science and Technology
报告时间：2007.07.11 上午10:00
报告地点：高分子楼二楼会议室
报告内容简介
Nanoporous templates have been widely used for the development of new functional nanostructured materials suitable for electronics, optics, magnetism, and energy storage materials. Recently, we have prepared nanoporous templates by using thin films of mixtures of polystyrene-block-poly(methyl methacrylate) (PS-b-PMMA) and PMMA homopolymers, followed by UV irradiation. These templates have cylindrical nanoholes spanning the entire thickness of the film.
The shape and the degree of the vertical orientation of the nanopores in the film was carried out by using grazing incidence X-ray scattering as well as 3-D transmission electron microscopy. We found that PMMA phases were completely removed by UV irradiation followed by rinsing with acetic acid, and that the nanoholes were perfectly aligned normal to the film surface. Three applications of nanoporous templates are introduced: 1) Anti-reflective coating, 2) the preparation of conducting polymer nanowires of poly(pyrrole), poly(3,4-ethylenedioxythiopene), and poly(3-hexyl thiopene) onto a glass coated with indium-tin-oxide, and 3) the separation membranes for biomaterials. We found that when the pore volume is ~0.68, almost zero reflectance at a specific wavelength, which can be changed with film thickness, was achieved at visible wavelengths. Furthermore, ultra high density array of conducting nanowires was successfully prepared onto various substrates including flexible polymer. Finally, these nanoporous films were found to be very effective for the separation of human Rhinovirus type 14 (HRV 14), major pathogen of a common cold in humans, from the buffer solution.
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材化学院高分子系
2007.7.6
