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1L9 bookmark

Korea-Taiwan Joint Symposium: Bridging Polymer Innovation (English)

  • Sep 30(Tue), 2025, 14:00 - 18:00
  • 9회장 (201호)
  • Chair : 권지언,이원호
15:15 - 15:40
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[1L9-4]

Magnetic-Field-Directed Phase Transitions of Block Copolymers

발표자Che-Yi Chu (National Chung Hsing University)

연구책임자Che-Yi Chu (National Chung Hsing University)

공동저자Che-Yi Chu (National Chung Hsing University), Tzu-Yun Lin (National Chung Hsing University), Wen-Sheng Chiu (National Chung Hsing University), Ya-Ting You (National Chung Hsing University), Chih-Chung Chen (National Chung Hsing University), Sheng-Jie Lin (National Chung Hsing University), Huang-Min Wang (National Chung Hsing University), Ying-Jie Wang (National Chung Hsing University), Chun-Jen Su (National Synchrotron Radiation Research Center), U-Ser Jeng (National Synchrotron Radiation Research Center)

Abstract

We investigated the magnetic-field-directed phase transition to fabricate an oriented double gyroid structure and the relevant lattice distortion of block copolymer/magnetic nanoparticle nanocomposites formed by the polystyrene-b-poly(ethylene oxide) (PS-b-PEO) and magnetic nanoparticles (MNPs) using the small-angle X-ray scattering (SAXS). This transition was driven by sequential generation of 3-fold junctions via the fusion at curved faces of deformed cylindrical segments containing the magnetic-field-guided spatially assembled MNPs. Meanwhile, the occurrence of lattice distortions was deduced to be governed by the preferred growth direction of PEO crystallites, which promoted distortion of the double gyroid cubic lattice.

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