Nanosecond-Milisecond Dynamics of Phase Transition/Phase Separation of Thermo-Responsive Polymers.

热响应聚合物相变/相分离的纳秒-毫秒动力学。

• 批准号: 18550002
• 负责人: TSUBOI Yasuyuki
• 金额: $ 2.57万
• 依托单位: Hokkaido University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2006
• 资助国家: 日本
• 起止时间: 2006 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18550002/
• 关键词: coil; globule; Stimuli-responsive polymer; poly(N-isopropylacrylamide); poly(vinyl methyl ether); gel; Volume phase transition; fluorescent probe; 近赤外レーザー; ラマンシフタ

We would like to demonstrate that laser is a powerful tool to explore chemistry of stimuli-responsive polymers. Main target materials of the present study are poly(N-isopropylacrylamide) (PNIPAM) and poly(vinyl methyl ether) (PVME) that are well known as representative thermo-responsive polymers. In aqueous solution, they exhibits phase transition from a coiled state to a globular state followed by phase separation in accordance to temperature elevation across the lower critical solution temperature. The present study falls into two categories. The first topic is (I) Dynamics of phase transition and phase separation as revealed by a laser T-jump technique. Time constants of the processes were determined with high accuracy and they were well correlated with molecular weight of the polymers. The second topic is (II) phase transition and phase separation induced by photon pressure of a focused laser beam. Optical micro-spectroscopy combined with laser-trapping technique was applied to the polymers and local structures of the polymer exerted with photon pressure were analyzed in details. Laser light would be an intriguing and novel stimulus to the polymers.

我们想证明激光是探索刺激反应性聚合物化学反应的强大工具。本研究的主要目标材料是聚（N-异丙基丙烯酰胺）（PNIPAM）和聚（乙烯基甲基醚）（PVME），它们被称为代表性的热响应聚合物。在水溶液中，它们表现出从盘绕状态到球状状态的相过渡，然后根据较低的临界溶液温度的温度升高进行相分离。本研究分为两类。第一个主题是（i）相变和相位分离的动力学，如激光T-JUMP技术所揭示的。过程的时间常数以高精度确定，并且与聚合物的分子量良好相关。第二个主题是（ii）聚焦激光束的光子压力引起的相变和相分离。将光学微光谱与激光捕获技术结合使用，用于分析带有光子压力的聚合物的聚合物和局部结构。激光光将是聚合物的有趣而新颖的刺激。

项目成果

「研究成果報告書概要(和文)」より

摘自《研究结果报告摘要（日文）》

• 发表时间: 2005
• 作者: Kawauchi;et. al.;Nishimura et al.;Dezawa et al.;Yoshizawa et al.;星野 幹雄;星野 幹雄
• 通讯作者: 星野 幹雄

最先端レーザープロセッシングの基礎と応用

尖端激光加工的基础和应用

• 发表时间: 2007
• 作者: Y. Tsuboi;T. Shoji;N. Kitamura;坪井泰之*・西野正行・喜多村 昇(他2名);辻 剛志*・坪井泰之(他2名);坪井泰之*・古畑庸介・喜多村 昇;坪井泰之*・東海林竜也・喜多村 昇;古畑庸介;坪井 泰之;坪井泰之;坪井 泰之;坪井泰之;坪井泰之;吉田康弘;坪井泰之(共編・共著)
• 通讯作者: 坪井泰之(共編・共著)

"Laser-Induced Reversible Volume Phase Transition of a Poly (N-isopropylacrylamide) Gel Explored by Raman Microspcetroscopy"

“通过拉曼显微镜探索聚（N-异丙基丙烯酰胺）凝胶的激光诱导可逆体积相变”

• 发表时间: 2008
• 期刊: Polymer J. 40
• 作者: 望月優子;高橋和也;馬場彩;中井陽一;五十嵐誠;牧島一夫;矢野安重;神山孝吉;本山秀明;坪井泰之;坪井泰之
• 通讯作者: 坪井泰之

"光圧で誘起されるゲルの体積相転移:ゲル中の水の構造解析"

“光压引起的凝胶体积相变：凝胶中水的结构分析”

• 发表时间: 2007
• 作者: Y. Tsuboi;T. Shoji;N. Kitamura;坪井泰之*・西野正行・喜多村 昇(他2名);辻 剛志*・坪井泰之(他2名);坪井泰之*・古畑庸介・喜多村 昇;坪井泰之*・東海林竜也・喜多村 昇;古畑庸介;坪井 泰之;坪井泰之;坪井 泰之;坪井泰之
• 通讯作者: 坪井泰之

金属構造体

金属结构

• 发表时间: 2006