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Issue 5, 2013
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Modular ambient temperature functionalization of carbon nanotubes with stimuli-responsive polymer strands

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Abstract

Cyclopentadienyl end-capped poly(N-isopropylacrylamide) (PNIPAM-Cp, Mn = 5400 g mol−1, PDI = 1.13) was synthesized via a combination of RAFT (Reversible Addition–Fragmentation Chain Transfer) polymerization and modular conjugation (characterized via Nuclear Magnetic Resonance (NMR) as well as Electrospray Ionization-Mass Spectrometry (ESI-MS)), and reacted with untreated Single Walled Carbon Nanotubes (SWCNTs) as dienophiles in a Diels–Alder reaction with PNIPAM-Cp (diene) at ambient temperature in the absence of any catalyst. The obtained stimuli-responsive hybrid materials display thermo-responsive behaviour evidenced via UV-VIS-spectroscopy and Dynamic Light Scattering (DLS). The grafting density of the PNIPAM chains at the surface of the SWCNTs was determined via Thermogravimetric Analysis (TGA), Elemental Analysis (EA) and X-ray Photoelectron Spectroscopy (XPS), to be close to 0.0288 chains per nm2.

Graphical abstract: Modular ambient temperature functionalization of carbon nanotubes with stimuli-responsive polymer strands

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Publication details

The article was received on 02 Nov 2012, accepted on 25 Nov 2012 and first published on 26 Nov 2012


Article type: Paper
DOI: 10.1039/C2PY20928D
Citation: Polym. Chem., 2013,4, 1525-1537
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    Modular ambient temperature functionalization of carbon nanotubes with stimuli-responsive polymer strands

    N. Zydziak, C. Hübner, M. Bruns, A. P. Vogt and C. Barner-Kowollik, Polym. Chem., 2013, 4, 1525
    DOI: 10.1039/C2PY20928D

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