Differences of internal structures between amphiphilic and hydrophobic block-copolymer nanoparticles

Takeshi Higuchi, Hiroshi Yabu, Masatsugu Shimomura

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

In this report, we show a novel and simple preparation method for obtaining block-copolymer nanoparticles. Regular-sized polymer nanoparticles are formed after evaporation of a good solvent from a polymer solution containing a non-volatile poor solvent and the volatile good solvent. Nanoparticles of poly(styrene-b-sodium acrylate), poly(styrene-b-4-vinylpyridine), and poly(styrene-b-isoprene) were prepared by using this method. We also discuss the difference of internal structures between amphiphilic and hydrophobic block-copolymer nanoparticles. From the results of scanning transmission electron microscope (STEM) imaging, the particles of amphiphilic block-copolymers have hollow structures were observed. On the other hand, the particles of a hydrophobic block-copolymer form lamellar micro-phase separation structures.

Original languageEnglish
Pages (from-to)856-858
Number of pages3
JournalJournal of Nanoscience and Nanotechnology
Volume7
Issue number3
DOIs
Publication statusPublished - 2007 Mar 1

Keywords

  • Block-copolymer
  • Nanoparticles
  • Phase separation structures
  • Self-assembly

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Materials Science (miscellaneous)
  • Engineering (miscellaneous)

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