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Issue 9, 2018
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Dual chain extension effect and antibacterial properties of biomolecules interleaved within LDH dispersed into PBS by in situ polymerization

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Abstract

Nanocomposites based on poly(butylene succinate) (PBS) and hydrotalcite-type anionic clays (HTs) organo-modified with biomolecules characterized by antibacterial and/or antioxidant activities, such as L-ascorbic acid (ASA), phloretic acid (HPP), L-tyrosine (TYR) and L-tryptophan (TRP), have been prepared by in situ polymerization. From XRD analysis and rheology experiments in a molten polymer state, intercalated HT hybrid platelets acting here as a hybrid filler are found to be well dispersed into polymers while providing a chain extension effect on PBS. Moreover, the molecules, when hosted within a HT interlayer gap, do preserve their pristine antibacterial activity, both in HT and in the resulting PBS composites. In particular, under the experimental conditions tested, HT/ASA and HT/TYR present the best combination of both properties (chain extension effect and antibacterial), especially versus E. coli as high as 90 and 97% of inhibition, respectively, using 2.5 wt% hybrid filler only. These findings open future applications for PBS associated with the hybrid HT filler as multifunctional materials in active packaging applications.

Graphical abstract: Dual chain extension effect and antibacterial properties of biomolecules interleaved within LDH dispersed into PBS by in situ polymerization

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Publication details

The article was received on 17 Oct 2017, accepted on 05 Jan 2018 and first published on 05 Jan 2018


Article type: Paper
DOI: 10.1039/C7DT03914J
Citation: Dalton Trans., 2018,47, 3155-3165
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    Dual chain extension effect and antibacterial properties of biomolecules interleaved within LDH dispersed into PBS by in situ polymerization

    G. Totaro, L. Sisti, A. Celli, I. Aloisio, D. Di Gioia, A. A. Marek, V. Verney and F. Leroux, Dalton Trans., 2018, 47, 3155
    DOI: 10.1039/C7DT03914J

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