Innovative Banana Fiber Nonwoven Reinforced Polymer Composites: Pre- and Post-Treatment Effects on Physical and Mechanical Properties

Four types of nonwovens were prepared from different sections of the banana tree e.g., outer bark (OB), middle bark (MB), inner bark (IB) and midrib of leaf (MR) by wet laid web formation. They were reinforced with two different types of matrices e.g., epoxy and polyester, to make eight variants of...

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Bibliographic Details
Published in:Polymers 2021-10, Vol.13 (21), p.3744
Main Authors: Motaleb, K. Z. M. Abdul, Ahad, Abdul, Laureckiene, Ginta, Milasius, Rimvydas
Format: Article
Language:English
Subjects:
Bark
Chemical composition
Composite materials
Elongated structure
Fibers
Flexural strength
Fourier transforms
Gamma rays
Hydrophobicity
Infrared analysis
Interfacial bonding
Mechanical properties
Moisture absorption
Morphology
Physical properties
Polymer matrix composites
Polymers
Productivity
Radiation therapy
Resins
Tensile strength
Textiles
Water absorption
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Summary:Four types of nonwovens were prepared from different sections of the banana tree e.g., outer bark (OB), middle bark (MB), inner bark (IB) and midrib of leaf (MR) by wet laid web formation. They were reinforced with two different types of matrices e.g., epoxy and polyester, to make eight variants of composites. Treatments including alkali on raw fibers, water repellent on nonwovens and gamma radiation on composites were applied in order to investigate their effects on properties of the composites such as water absorbency, tensile strength (TS), flexural strength (FS) and elongation at break (Eb%). Variations in the morphological structure and chemical composition of both raw banana fibers and fibers reinforced by the treatments were analyzed by Fourier Transform Infrared (FTIR) and Scanning Electron Microscopy (SEM). OB composites exhibited higher water absorbency, TS and FS and lower Eb% compared to other types of composites. Epoxy composites were found to have 16% lower water absorbency, 41.2% higher TS and 39.1% higher FS than polyester composites on an average. Water absorbency of the composites was reduced 32% by the alkali treatment and a further 63% by water repellent treatment. TS and FS of the composites were on average improved 71% and 87% by alkali treatment and a further 30% and 35% by gamma radiation respectively.
ISSN:2073-4360
2073-4360
DOI:10.3390/polym13213744