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A tapered optical fiber interferometer study on the microdynamics phase separation mechanism of the poly(N-isopropylacrylamide) aqueous solution
Author(s): Yunyun Huang; Zhuang Tian; Jie Li; Bai-Ou Guan
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Paper Abstract

Phase separation process of poly (N-isopropylacrylamide) (PNIPAM) aqueous solution was investigated by tapered optical fiber technique in this work. The optical transmission spectra revealed the transition of molecular conformation and aggregation of molecular chains in the course of phase separation and identified the lower critical solution temperatures (LCST) in a simple and clear way. It was found that upon heating PNIPAM chains changed from expanded coils to collapsed globules and then aggregated. It offers a new characterization technique for studying phase separation of polymer solutions or blends, and could provide abundant information of the interaction between two different macromolecules, revealing the internal mechanism of the interaction.

Paper Details

Date Published: 1 July 2015
PDF: 4 pages
Proc. SPIE 9655, Fifth Asia-Pacific Optical Sensors Conference, 965510 (1 July 2015); doi: 10.1117/12.2184209
Show Author Affiliations
Yunyun Huang, Jinan Univ. (China)
Zhuang Tian, Jinan Univ. (China)
Jie Li, Jinan Univ. (China)
Bai-Ou Guan, Jinan Univ. (China)

Published in SPIE Proceedings Vol. 9655:
Fifth Asia-Pacific Optical Sensors Conference
Byoungho Lee; Sang-Bae Lee; Yunjiang Rao, Editor(s)

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