Aliphatic–aromatic polyester–polyaniline composites: preparation, characterization, antibacterial activity and conducting properties

Abstract

Poly(butylene adipate‐co‐terephthalate) (PBAT) composites containing polyaniline (PANI) were prepared using a melt blending process. Acrylic‐acid‐grafted PBAT (PBAT‐g‐AA) and PANI were used to improve the compatibility and dispersibility of PANI within the PBAT matrix. The composites were characterised morphologically using scanning electron microscopy, chemically using Fourier transform IR spectrometry and 13C solid‐state nuclear magnetic resonance, and optically using UV‐visible spectroscopy. The electrical conductivity of the composites was also evaluated with a resistance tester and a cyclic voltameter. Escherichia coli (BCRC 10239) was chosen as the standard bacterium for determining the antibacterial properties of the composite materials. The anti‐static properties of the composites were also evaluated. The PBAT‐g‐AA/PANI composite showed markedly enhanced antibacterial and anti‐static properties due to the formation of amide bonds by the condensation of the carboxylic acid groups of PBAT‐g‐AA with the amino groups of PANI. The optimal level of PANI was 9 wt%, as excess PANI led to separation of the two organic phases, lowering their compatibility. Copyright © 2012 Society of Chemical Industry

Synthesis and characterization of biodegradable aliphatic–aromatic nanocomposites fabricated using maleic acid‐grafted poly[(butylene adipate)‐co‐terephthalate] and organically modified layered zinc phenylphosphonate

“…This result demonstrates the successful formation of covalent linkages (amide groups) for 5 wt% g‐PBAT‐80/m‐PPZn nanocomposite. Similar results using acrylic acid for the formation of amide linkage have been previously reported in the literature …”

Preparation of bromo‐substituted polyaniline with excellent antibacterial activity

“…The reported results also demonstrated that the doped PANIs have superior antibacterial abilities to that of dedoped counterparts, and most of doped PANIs cannot be applied in an environment of pH higher than 3.0 because of the dedoping of PANI or the instability of the functional groups . PANI composites containing aliphatic–aromatic–polyester‐PANI exhibit the same problems as that of PANI . What's more, PANI composites containing silver and copper usually have superior bactericidal abilities to that of PANI, especially under the condition of pH higher than 3.0, which are ascribed to the metallic ions .…”

Non-leaching antimicrobial biodegradable PBAT films through a facile and novel approach

“…PBAT can be used to produce fibers [5,6], textile, films [7] (such as mulching films) and packaging materials [8,9]. Moreover, PBAT composites and modified PBAT have been widely investigated in order to prepare value-added products, such as conductive [10] and antimicrobial materials [11][12][13][14][15][16], and meanwhile to minimize the cost. Among them, reducing cost and incorporating antimicrobial activity hold a particular position.…”

“…Chitosan [16], heparin or hyaluronic acid [11], furanoside [13], polyaniline [10], silver-silica [15] and multi-walled carbon nanotubes [14] were used to prepare the antimicrobial PBAT. However, some preparation procedures were rather complicated and no report on the timeliness of antimicrobial properties was available.…”