Polymer-brush-decorated graphene oxide

precision synthesis and liquid-crystal formation

Kohji Ohno, Chenzhou Zhao, Yuta Nishina

Research output: Contribution to journalArticle

Abstract

Given the specificity of the structure and function of graphene oxide (GO), hybridization with a variety of compounds will further extend its applications. To that end, we examined a new method for introducing a polymer brush onto the GO surface. In this method, GO was surface-modified with 2-((3-((2-bromo-2-methylpropanoyl)oxy)propyl)thio)ethylamine hydrochloride, which is a newly synthesized compound that contains an initiating group for atom transfer radical polymerization (ATRP) and an amino group for reacting with the epoxy groups on the GO surface. The ATRP-initiator-functionalized GO was then used as a substrate for the surface-initiated ATRP of methyl methacrylate (MMA), which produced graft polymers of poly(MMA) (PMMA) with targeted molecular weights and narrow molecular weight distributions; the average graft density was ∼0.06 chains/nm2. Because of their high dispersibilities and structural anisotropies, the PMMA-brush-decorated GOs formed lyotropic liquid crystals in their suspensions. In addition, similar suspensions with relatively high hybrid concentrations exhibited structural color that depended on the concentration.

Original languageEnglish
JournalLangmuir
DOIs
Publication statusAccepted/In press - Jan 1 2019

Fingerprint

Liquid Crystals
Graphite
brushes
Brushes
Liquid crystals
Oxides
Graphene
graphene
Polymers
liquid crystals
Atom transfer radical polymerization
Polymethyl Methacrylate
oxides
polymers
synthesis
polymerization
molecular weight
Suspensions
atoms
Methacrylates

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

Cite this

Polymer-brush-decorated graphene oxide : precision synthesis and liquid-crystal formation. / Ohno, Kohji; Zhao, Chenzhou; Nishina, Yuta.

In: Langmuir, 01.01.2019.

Research output: Contribution to journalArticle

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