Extremely high frequency dynamics study of polymer solutions using THz spectroscopic techniques
Project/Area Number |
26288055
|
Research Category |
Grant-in-Aid for Scientific Research (B)
|
Allocation Type | Partial Multi-year Fund |
Section | 一般 |
Research Field |
Polymer chemistry
|
Research Institution | Tokyo University of Agriculture and Technology |
Principal Investigator |
Shikata Toshiyuki 東京農工大学, (連合)農学研究科(研究院), 教授 (10178858)
|
Co-Investigator(Kenkyū-buntansha) |
田中 文彦 京都大学, 工学(系)研究科(研究院), 名誉教授 (50107695)
|
Project Period (FY) |
2014-04-01 – 2017-03-31
|
Project Status |
Completed (Fiscal Year 2016)
|
Budget Amount *help |
¥17,160,000 (Direct Cost: ¥13,200,000、Indirect Cost: ¥3,960,000)
Fiscal Year 2016: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2014: ¥13,520,000 (Direct Cost: ¥10,400,000、Indirect Cost: ¥3,120,000)
|
Keywords | テラヘルツ分光 / 水溶性高分子 / 親水性基 / 中間親水性基 / 誘電スペクトル / 水和 / 水素結合 / 高分子物性 / 水和・溶媒和 / 高分子構造・物性 / 溶媒和 / 回転緩和 |
Outline of Final Research Achievements |
We established a broadband dielectric spectrum measuring system covering a frequency range from 1 M to 3 GHz. The obtained dielectric spectra of aqueous solution of hydrophilic polymers revealed that the relaxation mode assigned to dangling water hydroxy groups without forming hydrogen bonding to other water molecules decreased with increasing concentration. On the other hand, a relaxation mode was newly found, and its intensity increased with increasing the concentration. These proposed that the (hydrophilic) hydration is resulted from hydrogen bond formation between a dangling water hydroxy group and a hydrophilic one. Dielectric spectra demonstrated that water hydroxyl groups adjacent nitro and cyano groups do not form hydrogen bonds to the groups, but cause only dipole-dipole interactions, then they become dangling ones. Since nitro and cyano groups possess intermediate characteristics between hydrophilic and hydrophobic groups, they are classified into hydroneutral groups.
|
Report
(4 results)
Research Products
(35 results)
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
[Presentation] 続・やさしいレオロジー入門2015
Author(s)
四方俊幸
Organizer
第26回ハイドロコロイドセミナー
Place of Presentation
京都大学化学研究所(京都府宇治市五ヶ庄)
Year and Date
2015-05-21
Related Report
Invited
-
-
-
-
[Presentation] やさしいレオロジー入門2014
Author(s)
四方俊幸
Organizer
食品ハイドロゲルシンポジウム
Place of Presentation
東京海洋大
Year and Date
2014-05-21 – 2014-05-22
Related Report
Invited
-
-
-
-