Spontaneously formed hydrophilic surfaces by segregation of block copolymers with water-soluble blocks

Hideaki Yokoyama, Takayuki Miyamae, Seok Han, Takashi Ishizone, Keiji Tanaka, Atsushi Takahara, Naoya Torikai

研究成果: ジャーナルへの寄稿記事

60 引用 (Scopus)

抄録

A block copolymer of deuterated polystyrene (dPS) and 2-[2-(2-methoxyethoxy)ethoxy]ethyl methacrylate (PME3MA) spontaneously exposes the PME3MA block, which is soluble in water, to the surface in a vacuum. dPS-PME3MA mixed with polystyrene (PS) segregates to the PS surface and changes the hydrophobic PS surface into hydrophilic surface. Neutron reflectivity, X-ray photoelectron spectroscopy, and dynamic secondary ion mass spectrometry probe the surface segregation of dPS-PME3MA to the surface of PS due to its PME3MA block. Sum-frequency generation vibrational spectroscopy detects exclusively the triethylene oxide (3EO) side chains of PME3MA regardless of a small fraction of dPS-PME3MA in the mixture, suggesting the conformation of the side chains influencing the segregation behavior. Because of the amphiphilic character of the methoxy-terminated 3EO side chains, the PME3MA block exposes the terminal methyl groups of the side chains to the surface to reduce the free energy of the system. However, such a hydrophobic methyl surface layer barely covers the EO part of the side chains; the surface quickly reconstructs and becomes hydrophilic upon contact with water. This is a technologically important demonstration of converting a hydrophobic polymer surface to a hydrophilic surface just by adding a small amount of block copolymer.

元の言語英語
ページ(範囲)5180-5189
ページ数10
ジャーナルMacromolecules
38
発行部数12
DOI
出版物ステータス出版済み - 6 14 2005

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Block copolymers
Polystyrenes
Water
Surface segregation
Vibrational spectroscopy
Methacrylates
Secondary ion mass spectrometry
Free energy
Conformations
Polymers
Neutrons
Demonstrations
X ray photoelectron spectroscopy
Vacuum
Oxides

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

これを引用

Spontaneously formed hydrophilic surfaces by segregation of block copolymers with water-soluble blocks. / Yokoyama, Hideaki; Miyamae, Takayuki; Han, Seok; Ishizone, Takashi; Tanaka, Keiji; Takahara, Atsushi; Torikai, Naoya.

:: Macromolecules, 巻 38, 番号 12, 14.06.2005, p. 5180-5189.

研究成果: ジャーナルへの寄稿記事

Yokoyama, Hideaki ; Miyamae, Takayuki ; Han, Seok ; Ishizone, Takashi ; Tanaka, Keiji ; Takahara, Atsushi ; Torikai, Naoya. / Spontaneously formed hydrophilic surfaces by segregation of block copolymers with water-soluble blocks. :: Macromolecules. 2005 ; 巻 38, 番号 12. pp. 5180-5189.
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