Nanotechnology-aimed Poymer Synthses using Supercritical Fluids

使用超临界流体的纳米技术目标聚合物合成

• 批准号: 15550102
• 负责人: MORI Toshiaki
• 金额: $ 2.5万
• 依托单位: TOKYO INSTITUTE OF TECHNOLOGY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15550102/
• 关键词: Supercritical Fluids; Carbon Dioxide; Fluoroform; Precision Polymerization; Surface Modification; Tetratluoroethylenes; Hydrophobicity Lipophobicity; ESCA

Homogeneous polymerizations of tetrafluoroethylenes were executed in supercritical fluoroform, and the morphology of the resulting poly (tetrafluoroethylene)s were observed as the fibrous which were dispersedly and uniformly twined with low density, independent of pressure in the systems. Each piece was ca 100 nm in width and 10 μm in long. The number average of molecular weight and conversions of poly (tetrafluoroethylene) can be controlled by pressure and temperature from 10^4 to 10^6, and 60%-80%, respectively. Heterogeneous detergent, stabilizer-free polymerization can be performed in supercritical supercritical fluoroform/water emulsion. Uniform spherical submicron-particles (200 nm) were obtained, dependent of pressure and water content in the systems.Processing of polymer substrates such as swelling and immersing by supercritical fluids have been studied as a new route to a polymer surface modification. Polymerization of tetrafluoroethylenes (TFE) was carried out in scCO_2 or scCHF_3 in the presence of high density polyethylene (HDPE) and polycarbonate (PC) plates. The surface property was determined by X-ray photoelectron spectroscopy, and its surface energy was estimated by contact angles. Thickness and density of the penetrating PTFE onto substrates depend on conditions of supercritical fluids such as pressure or temperature.

在超临界氟仿中进行了四氟乙烯的均匀聚合，并观察到所得到的聚四氟乙烯的形态为纤维，其分散而均匀地缠绕在一起，密度低，与系统中的压力无关。每片约100纳米宽，10 μm长。聚四氟乙烯的分子量数平均值和转化率可通过压力和温度分别控制在10^4 ~ 10^6和60% ~ 80%之间。非均相洗涤剂、无稳定剂可在超临界氟仿/水乳液中进行聚合。得到了均匀的球形亚微米颗粒（200 nm），这取决于系统中的压力和含水量。超临界流体对聚合物基体的溶胀和浸泡等处理是聚合物表面改性的新途径。在高密度聚乙烯（HDPE）和聚碳酸酯（PC）板存在下，在scCO_2或scCHF_3中进行了四氟乙烯（TFE）的聚合。用x射线光电子能谱法测定其表面性质，用接触角法测定其表面能。渗透到基材上的聚四氟乙烯的厚度和密度取决于超临界流体的条件，如压力或温度。

项目成果

H.Nishino, A.Murakawa, T.Mori, Y.Okahata: "Kinetic Studies of Amylopectin Cleavage Reactions Catalyzed by Phosphorylase b using a 27 MHz Quartz Crystal Microbalance"Biochemistry. (印刷中). (2004)

H.Nishino、A.Murakawa、T.Mori、Y.Okahata：“使用 27 MHz 石英晶体微天平进行磷酸化酶 b 催化的支链淀粉裂解反应的动力学研究”（出版中）。

森 俊明: "超臨界流体中で酵素反応を制御する"化学と教育. 51. 420-421 (2003)

Toshiaki Mori：“控制超临界流体中的酶反应”化学与教育 51. 420-421 (2003)。

高分子基材の表面修飾法および該方法によって得られた高分子基材

聚合物基材的表面改性方法及由该方法得到的聚合物基材

• 发表时间: 2004

Gravimetric Analyses of Enzymatic Glucan Hydrolysis and Phosphorolysis on a 27 MHz Quartz-Crystal Microbalance

在 27 MHz 石英晶体微天平上进行酶促葡聚糖水解和磷酸解的重量分析

• 发表时间: 2005
• 期刊: Trends in Glycoscience and Glycotechnology
• 影响因子: 0.3
• 作者: T.Mori;Y.Okahata
• 通讯作者: Y.Okahata

糖鎖の関わる酵素反応を重さで測る

按重量测量涉及糖链的酶反应

• 发表时间: 2004
• 期刊: 高分子 53
• 作者: 森 俊明;岡畑 恵雄;森 俊明
• 通讯作者: 森 俊明