Science and Functions of Densely Grafted solid Surfaces

致密接枝固体表面的科学与功能

• 批准号: 14205131
• 负责人: FUKUDA Takeshi
• 金额: $ 35.03万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14205131/
• 关键词: high-density brushes; new surfaces; high modulus; extreme lubricity; size-excluding; adhesion-preventing; composite nanoparticles; self-ordering; リビングラジカル重合; 高密度ポリマーブラシ; グラフト鎖の高度伸長; 膨潤グラフト膜; 高弾性率; 極低摩擦表面; 高密度グラフト化微粒子; セミ・ソフトコロイド結晶; 高密度高分子ブ

We studied the structure, properties, and functions of high-density polymer brushes from a range of angles to obtain the following new findings : (1)High-density dry brushes have higher glass transition temperatures and (2)higher compression moduli than equivalent spin-cast films, and (3)they are immiscible with homologous free polymers. (4) While high-density brushes swollen in a good solvent also have high compression moduli, (5)they exhibit extremely low friction coefficients. (6)Silica monolith columns with high-density poly (methyl methacrylate) (PMMA) brushes grafted on their surfaces show a size-exclusion effect by the brush layer. (7)Surfaces with high-density poly (hydroxyethyl methacrylate) (PHEMA) brushes effectively prevent adsorption and adhesion of protein molecules. (8)Gold and silica nanoparticles dispersed in a good solvent for the brush polymer form 2- and 3-dimensionally ordered structures with a very large particle-to-particle nearest distance, even comparable to the full length of the graft chains. These results are specific to high-density brushes, but not to medium-to-low density brushes, and suggest possible applications of high-density polymer brushes to various fields of science and technology.

我们从多个角度研究了高密度聚合物刷的结构、性能和功能，得到以下新发现：（1）高密度干刷具有比同等旋涂薄膜更高的玻璃化转变温度和（2）更高的压缩模量，（3）它们与同系自由聚合物不混溶。(4)虽然在良溶剂中溶胀的高密度刷也具有高压缩模量，（5）它们表现出极低的摩擦系数。（6）表面接枝高密度聚甲基丙烯酸甲酯（PMMA）刷的硅胶整体柱显示出刷层的尺寸排阻效应。（7）表面具有高密度聚甲基丙烯酸羟乙酯（PHEMA）刷，有效防止蛋白质分子的吸附和粘附。（8）分散在刷状聚合物的良溶剂中的金和二氧化硅纳米颗粒形成具有非常大的颗粒间最近距离的二维和三维有序结构，甚至与接枝链的全长相当。这些结果是特定于高密度刷，但不是中到低密度刷，并建议可能的高密度聚合物刷的各种科学和技术领域的应用。

项目成果

Glass transition temperatures of high-density poly(methyl methacrylate) brushes

• DOI: 10.1021/ma0255128
• 发表时间: 2002-07
• 期刊: Macromolecules
• 影响因子: 5.5
• 作者: S. Yamamoto;Y. Tsujii;T. Fukuda

Y.Kwak: "A Difference of Six Orders of Magnitude : A Reply to "The Magnitude of Fragmentation Rate Coefficient"J.Polym.Sci.Polym.Chem.. 41. 2833-2839 (2003)

Y.Kwak：“六个数量级的差异：对“破碎率系数的大小”的答复 J.Polym.Sci.Polym.Chem.. 41. 2833-2839 (2003)

Y.Tsujii: "Fabrication of Patterned High-Density Polymer Graft Surfaces. II. Amplification of EB-Patterned Initiator Monolayer by Surface-Initiated Atom Transfer Radical Polymerization"Polymer. 43. 3837-3741 (2002)

Y.Tsujii：“图案化高密度聚合物接枝表面的制造。II.通过表面引发原子转移自由基聚合来放大EB图案化引发剂单层”聚合物。

Mechanism-Based Invention of High-Speed Living Radical Polymerization Using Organotellurinm Compounds and Azo-Initiators

基于机理的利用有机碲化合物和偶氮引发剂的高速活性自由基聚合的发明

• 发表时间: 2003
• 期刊: J.Am.Chem.Soc. 125
• 作者: J.Xiang;A.Orita;J.Otera;H.Sekine;Y.Tanaka;H.Sekine;A.Goto et al.
• 通讯作者: A.Goto et al.

C.Yoshikawa: "Quantitative Comparison of Theory and Experiment on Living Radical Polymerization Kinetics. 1. Nitroxide-Mediated"Macromolecules. 35. 5801-5807 (2002)

C.Yoshikawa：“活性自由基聚合动力学理论与实验的定量比较。1.氮氧化物介导的”大分子。