Phase Separation Dynamics of Aqueous Solutions of Thermo-Responsive Polymers Studied by a Laser-Induced Temperature Jump Combined with Transient Photometry

• TADA Takanori

  Graduate School of Chemical Sciences and Engineering., Hokkaido University

• KITAMURA Noboru

  Graduate School of Chemical Sciences and Engineering., Hokkaido University

• SHOJI Tatsuya

  Graduate School of Science., Osaka city University

• TSUBOI Yasuyuki

  Graduate School of Science., Osaka city University

Bibliographic Information

Other Title

• レーザー温度ジャンプ型過渡透過光計測法による温度応答性高分子水溶液の相分離ダイナミクスの研究
• レーザー オンド ジャンプガタ カト トウカコウ ケイソクホウ ニ ヨル オンド オウトウセイ コウブンシ スイヨウエキ ノ ソウ ブンリ ダイナミクス ノ ケンキュウ

Abstract

Aqueous solutions of thermo-responsive polymers represented by poly(N-isopropylacrylamide) (PNIPAM) exhibit a coil-to-globule phase transition followed by phase separation upon temperature increase. These polymers are promising smart materials that can form the basis for drug delivery systems. In order to apply these polymers as smart materials, it is necessary to acquire a precise knowledge on the dynamic behavior of phase separation. Recently, we developed a technique that combined a laser-induced temperature-jump with transient photometry to reveal the phase sepation dynamics in aqueous PNIPAM solutions. By using this particular technique, we demonstrated that the phase separation accerelated with increasing the polymer concentration. Furthermore, we found that the molecular weight of polymers and the stereoregularity of polymers influence the phase separation dynamics. Our observations will offer a new avenue for the design and development of thermo-responsive-polymer-based smart materials whose responsiveness can be controlled via the stereoregularity of the polymer.

Journal

• KOBUNSHI RONBUNSHU

  KOBUNSHI RONBUNSHU 72 (12), 707-720, 2015

  The Society of Polymer Science, Japan

Keywords

• Poly(<i>N</i>-isopropylacrylamide)
• Lower Critical Solution Temperature
• Stereoregularity
• Single Molecule Fluorescence Imaging
• Fluorescence Correlation Spectroscopy
• Time-Resolved Fluorescence Spectroscopy
• Solution Structure
• Acceleration
• Diffusion-Controlled Aggregation Model

Details

• CRID: 1390282681503243648
• NII Article ID: 130005115698
• NII Book ID: AN00085011
• DOI: 10.1295/koron.2015-0069
• ISSN: 18815685
• ISSN: 03862186
• NDL BIB ID: 027046519
• Web Site: http://id.ndl.go.jp/bib/027046519
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I027046519
• Web Site: https://www.jstage.jst.go.jp/article/koron/72/12/72_2015-0069/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed