Cyclodextrin polyurethanes polymerized with multi-walled carbon nanotubes: Synthesis and characterization

被引：33

作者：

Salipira, K. L. ^{[1
]}

Krause, R. W. ^{[1
,2
]}

Mamba, B. B. ^{[1
]}

Malefetse, T. J. ^{[1
]}

Cele, L. M. ^{[1
,2
]}

Durbach, S. H. ^{[1
,2
]}

机构：

[1] Univ Johannesburg, Dept Chem Technol, ZA-2028 Johannesburg, South Africa

[2] Univ Witwatersrand, DST NRF Ctr Excellence Strong Mat, Sch Phys, ZA-2050 Johannesburg, South Africa

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2008年 / 111卷 / 2-3期

关键词：

beta-cycloclextrin; polyurethanes; multi-walled carbon nanotubes; characterization; electron microscopy;

D O I：

10.1016/j.matchemphys.2008.03.026

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Insoluble cyclodextrin polymers co-polymerized with multi-walled carbon nanotubes were synthesized by polymerizing beta-cyclodextrin with acid-functionalized multi-walled carbon nanotubes and diisocyanate linkers; hexamethylene-and toluene-2,4-diisocyanate. The polymers are useful in removing some organic pollutants from water, and we now report the full characterization of these polymers using infrared spectroscopy (IR), Raman spectroscopy, scanning and transmission electron microscopy (SEM and TEM) and thermal techniques such as thermal gravimetric analysis (TGA) and differential scanning calorimetry (DSC). The polymers could be synthesized as either powders or amorphous solids. Results of the IR analysis showed the presence of functional groups such as C=O, C=C, C-H and C-O, indicating that polymerization indeed took place. Characterization of the polymers by scanning electron microscopy and BET analysis showed that these polymers had a spongy appearance indicating a hierarchical pore structure. Incorporation of small amounts (<5%) of multi-walled nanotubes (MWNTs) improved the thermal stability of the polymers. This observation was further confirmed by differential scanning calorimetry (DSC) measurements. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：218 / 224

页数：7

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