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Biocomposites of PLA and Mango Seed Waste: Potential Material for Food Packaging and a Technological Alternative to Reduce Environmental Impact
Author(s) -
Lima Edla Maria Bezerra,
Middea Antonieta,
Neumann Reiner,
Thiré Rossana Mara da Silva Moreira,
Pereira Jéssica Fernandes,
Freitas Sidinea Cordeiro,
Penteado Marília Stephan,
Lima Aline Muniz,
Minguita Adriana Paula da Silva,
Mattos Mariana da Costa,
Teixeira Alessandra da Silva,
Pereira Ingrid Cristina Soares,
Rojas dos Santos Natália Rodrigues,
Marconcini José Manoel,
Oliveira Renata Nunes,
Corrêa Ana Carolina
Publication year - 2021
Publication title -
starch ‐ stärke
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.62
H-Index - 82
eISSN - 1521-379X
pISSN - 0038-9056
DOI - 10.1002/star.202000118
Subject(s) - differential scanning calorimetry , biocomposite , fourier transform infrared spectroscopy , thermogravimetry , materials science , thermogravimetric analysis , chemical engineering , food packaging , extrusion , dynamic mechanical analysis , composite material , starch , chemistry , food science , polymer , composite number , physics , engineering , thermodynamics
Mango seeds from agro‐industry represents an environmental problem due to the amounts of by‐products produced. Conversely, poly (lactic acid) (PLA) is a potential green alternative to conventional plastics. The goal of this study aimed to develop a biocomposite based on PLA and mango’s by‐product for rigid packaging. Six biocomposites are obtained by extrusion/injection processing using formulations with PLA as a matrix and up to 20% by weight of mango seed’s by‐products. The materials are characterized by chemical and physical analysis; scanning electron microscopy/energy dispersive X‐ray, X‐ray diffraction; Fourier transform infrared spectroscopy (FTIR); thermal gravimetric analysis/differential thermogravimetry; differential scanning calorimetry (DSC), and mechanical analysis. FTIR bands and DSC transitions related to starch are higher in the kernel, while more cellulose bands are found in the integument. Kernel presented thermal degradation in the biocomposites, the sample PLA+20 wt% kernel. For the other compositions, it is possible to observe that they could keep their morphology. Significant improvements in both mechanical and barrier properties are found in the formulation with 20 wt% integument (up to 38% in elastic modulus). Therefore, this study suggests that biocomposites developed from PLA / Integument / Kernel have potential as a new biomaterial for rigid food packaging systems.