Helical Nanocomposites from Chiral Block Copolymer Templates

Journal Article · Thu Jan 01 04:00:00 EST 2009 · Journal of the American Chemical Society

DOI:https://doi.org/10.1021/ja808092v· OSTI ID:980227

Tseng, W; Chen, C; Chiang, Y; Ho, R; Akasaka, S; Hasegawa, H

Three-dimensional hexagonally packed PLLA nanohelices in the PS matrix were formed in the self-assembly of PS-PLLA chiral block copolymer. After hydrolysis of the PLLA blocks, PS with hexagonally packed helical nanochannels can be fabricated and treated as the template for the following sol-gel process. Subsequently, silica precursor mixture was introduced into the PS template by a pore-filling process. Well-defined helical nanocomposites with SiO2 inorganic nanohelices orderly dispersed in polymeric matrix can be successfully obtained after the sol-gel process. As a result, with the combination of the self-assembly of degradable block copolymers and sol-gel chemistry, we suggest a novel method for the preparation of the helical nanocomposites with ordered texture.

• Research Organization: Brookhaven National Laboratory (BNL) National Synchrotron Light Source
• Sponsoring Organization: Doe - Office Of Science
• DOE Contract Number: AC02-98CH10886
• OSTI ID: 980227
• Report Number(s): BNL--93145-2010-JA
• Journal Information: Journal of the American Chemical Society, Journal Name: Journal of the American Chemical Society Vol. 131; ISSN JACSAT; ISSN 0002-7863
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CHEMISTRY
COPOLYMERS
HYDROLYSIS
MIXTURES
PRECURSOR
SILICA
SILICON OXIDES
SOL-GEL PROCESS
TEXTURE
national synchrotron light source