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Nanomaterials 2019, 9(4), 618; https://doi.org/10.3390/nano9040618

Ionic Liquids as Delaminating Agents of Layered Double Hydroxide during In-Situ Synthesis of Poly (Butylene Adipate-co-Terephthalate) Nanocomposites

1
Institute of Macromolecular Chemistry of the Czech Academy of Sciences, Heyrovského nám. 2, 162 06 Prague 6, Czech Republic
2
Université de Lyon, CNRS, UMR 5223, Ingénierie des Matériaux Polymères, INSA Lyon, F-69621 Villeurbanne, France
3
Institute of Inorganic Chemistry of the Czech Academy of Sciences, Husinec-Řež č.p. 1001, 25068 Řež, Czech Republic
*
Author to whom correspondence should be addressed.
Received: 14 March 2019 / Revised: 9 April 2019 / Accepted: 10 April 2019 / Published: 16 April 2019
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Abstract

Currently, highly demanded biodegradable or bio-sourced plastics exhibit inherent drawbacks due to their limited processability and end-use properties (barrier, mechanical, etc.). To overcome all of these shortcomings, the incorporation of lamellar inorganic particles, such as layered double hydroxides (LDH) seems to be appropriate. However, LDH delamination and homogenous dispersion in a polymer matrix without use of harmful solvents, remains a challenging issue, which explains why LDH-based polymer nanocomposites have not been scaled-up yet. In this work, LDH with intercalated ionic liquid (IL) anions were synthesized by a direct co-precipitation method in the presence of phosphonium IL and subsequently used as functional nanofillers for in-situ preparation of poly (butylene adipate-co-terephthalate) (PBAT) nanocomposites. The intercalated IL-anions promoted LDH swelling in monomers and LDH delamination during the course of in-situ polycondensation, which led to the production of PBAT/LDH nanocomposites with intercalated and exfoliated morphology containing well-dispersed LDH nanoplatelets. The prepared nanocomposite films showed improved water vapor permeability and mechanical properties and slightly increased crystallization degree and therefore can be considered excellent candidates for food packaging applications. View Full-Text
Keywords: poly (butylene adipate-co-terephthalate); ionic liquid; layered double hydroxide; in-situ polymerization; nanocomposite; permeability; biodegradable polymer poly (butylene adipate-co-terephthalate); ionic liquid; layered double hydroxide; in-situ polymerization; nanocomposite; permeability; biodegradable polymer
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Beneš, H.; Kredatusová, J.; Peter, J.; Livi, S.; Bujok, S.; Pavlova, E.; Hodan, J.; Abbrent, S.; Konefał, M.; Ecorchard, P. Ionic Liquids as Delaminating Agents of Layered Double Hydroxide during In-Situ Synthesis of Poly (Butylene Adipate-co-Terephthalate) Nanocomposites. Nanomaterials 2019, 9, 618.

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