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A Non‐Covalent Method to Functionalize Multi‐Walled Carbon Nanotubes Using Six‐Armed Star Poly( L ‐lactic acid) with a Triphenylene Core
Author(s) -
Yang LiPing,
Pan CaiYuan
Publication year - 2008
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200700541
Subject(s) - triphenylene , carbon nanotube , raman spectroscopy , covalent bond , materials science , polymerization , polymer , polymer chemistry , x ray photoelectron spectroscopy , absorption (acoustics) , chemical engineering , chemistry , composite material , organic chemistry , molecule , physics , optics , engineering
Well‐defined six‐armed star poly( L ‐lactic acid) (PLLA) with a triphenylene core has been prepared by ring‐opening polymerization of L ‐lactide. As a result of strong π – π interactions between the triphenylene core and the multi‐walled carbon nanotubes (MWCNTs), the polymer was conveniently immobilized on the surface of the as‐received MWCNTs by a simple ultrasonic process while the intrinsic graphitic structure of the pristine MWCNTs is retained. The non‐covalent interaction between the carbon nanotubes and the polymer has been proven by the UV‐vis absorption spectra, the fluorescence spectra, the Raman spectra, and the X‐ray photoelectron spectra.