Reactively Processed Poly(butylene adipate terephthalate) Composite–Based Multilayered Films with Improved Properties for Sustainable Packaging Applications: Structural Characterization and Biodegradation Mechanism

Author:

Bandyopadhyay Jayita12ORCID,Botlhoko Orebotse Joseph1ORCID,Mphahlele Caroline1,Lekalakala Rakgoshi1,Muniyasamy Sudhakar1ORCID,Ray Suprakas Sinha13ORCID

Affiliation:

1. Centre for Nanostructures and Advanced Materials DSI‐CSIR Nanotechnology Innovation Centre Council for Scientific and Industrial Research Pretoria 0001 South Africa

2. Department of Chemical Engineering Laval University Quebec G1V0A6 Canada

3. Department of Chemical Sciences University of Johannesburg Doornfontein, 2028 Johannesburg South Africa

Abstract

AbstractIn this study, it is attempted to enhance the properties and biodegradability of poly(butylene adipate terephthalate) (PBAT) using nanocomposite technology to meet the demand for sustainable packaging applications. Two nanoclays containing PBAT composites are reactively processed and integrated into the multilayered films. Reactive processing facilitates the dispersion and distribution of nanoclay particles in the PBAT matrix. The multilayered films comprising reactively processed PBAT composites exhibited a 24.5%–31.5% reduction in the oxygen transmission rate and improved dimensional stability and tensile properties. Moreover, the degradability of the multilayered film comprising reactively processed PBAT composites reached 82% in 180 days. In contrast, a neat PBAT film of similar thickness attained only 53% degradation in the same period. The biodegradation mechanism is proposed based on the topology of the disintegrated films studied using scanning electron microscopy, chemical bond vibrations determined by Fourier‐transform infrared spectroscopy, and structural evolution by small‐ and wide‐angle X‐ray scattering (SWAXS). The SWAXS analysis is used to understand the changes in the degree of crystallinity, long‐range periodic order, and crystalline and amorphous layer thickness of the multilayered films before and after degradation. Such multilayered films can find applications where packaging or biomedical devices cannot be recycled.

Funder

Council for Scientific and Industrial Research, South Africa

Department of Science and Technology, Republic of South Africa

Publisher

Wiley

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