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- Title
Polyester and multiwalled carbon nanotube composites: characterization, electrical conductivity and antibacterial activity.
- Authors
Chin-San Wu
- Abstract
Poly(butylene terephthalate) (PBT) composites containing multiwalled carbon nanotubes (MWCNTs) were prepared using a melt-blending process and used to examine the effects on the composite structure and properties of replacing PBT with acrylic acid-grafted PBT (PBT- g-AA). PBT- g-AA and multihydroxyl-functionalized MWCNTs (MWCNTs-OH) were used to improve the compatibility and dispersibility of the MWCNTs within the PBT matrix. The composites were characterized morphologically using transmission electron microscopy, and chemically using Fourier transform infrared, solid-state C NMR and UV-visible absorption spectroscopy. The antibacterial and electrical conductivity properties of the composites were also evaluated. MWCNTs or MWCNTs-OH enhanced the antibacterial activity and electrical conductivity of the PBT/MWCNT or PBT- g-AA/MWCNTs-OH composites. The functionalized PBT- g-AA/MWCNTs-OH composites showed markedly enhanced antibacterial properties and electrical conductivity due to the formation of ester bonds from the condensation of the carboxylic acid groups of PBT- g-AA with the hydroxyl groups of MWCNTs-OH. The optimal proportion of MWCNTs-OH in the composites was 1 wt%; in excess of this amount, the compatibility between the organic and inorganic phases was compromised. Copyright © 2011 Society of Chemical Industry Polyester-functionalized multiwalled carbon nanotubes (MWCNTs) were prepared to provide multifunctional properties. The current study demonstrates an enhancement in the compatibility between poly(butylene terephthalate) (PBT) composites and MWCNTs with consequent improvements in antibacterial activity, electrical conductivity and antistatic efficiency when the proportion of multihydroxyl-functionalized MWCNTs in the composites is 1 wt%.
- Subjects
POLYESTERS; CARBON nanotubes; ACRYLIC acid; ABSORPTION spectra; CARBOXYLIC acids; ANTIBACTERIAL agents
- Publication
Polymer International, 2011, Vol 60, Issue 5, p807
- ISSN
0959-8103
- Publication type
Article
- DOI
10.1002/pi.3022