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.

我们想要证明激光是探索刺激响应性聚合物化学的强大工具。本研究的主要目标材料是具有代表性的热响应聚合物聚N-异丙基丙烯酰胺(PNIPAM)和聚乙烯基甲基醚(PVME)。在水溶液中，它们表现出从盘绕状态到球状状态的相变，然后根据较低临界溶液温度的升高进行相分离。本研究分为两类。第一个主题是(I)用激光T跳跃技术揭示的相变和相分离的动力学。测定过程的时间常数精度较高，且与聚合物的相对分子质量有很好的相关性。第二个主题是(II)聚焦激光束的光子压强引起的相变和相分离。将光学显微光谱与激光捕获技术相结合应用于聚合物，并详细分析了聚合物在光子压力作用下的局域结构。激光将是一种耐人寻味的、新颖的聚合物刺激。

项目成果

Phase Separation of Aqueous Poly(vinyl methylether) Solutions Induced by the Photon Pressure of a Focused Near Infrared Laser Beam

聚焦近红外激光束光子压力诱导聚（乙烯基甲基醚）水溶液的相分离

• 发表时间: 2007
• 期刊: Bull. Chem. Soc. Jpn. 80(10)
• 作者: T. Tsuboi;M. Nishino;Y. Matsuo;K. Ijiro;N. Kitamura
• 通讯作者: N. Kitamura

「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