Adhesion chemistry of plant-based cellulosic fibers and polymeric matrices in composites: a review
Md Shadhin, Nusrat Jahan Tisha, Marzia Dulal, Raghavan Jayaraman, Mashiur Rahman
TL;DR
This paper reviews how plant-based fibers stick to polymer materials in composites, focusing on factors like fiber structure and chemical composition that affect performance.
Contribution
The paper systematically reviews adhesion mechanisms and structural factors influencing the performance of plant-based cellulosic fiber polymer composites.
Findings
Fiber length increases composite properties up to a threshold due to enhanced mechanical interlocking.
Higher fiber or yarn twist reduces interfacial adhesion due to compactness and reorientation.
Cellulose content is the primary determinant of interface properties, while hemicellulose and lignin form weak boundary layers.
Abstract
Plant-based cellulosic fibers are often considered a preferred material choice for polymer composites due to growing environmental concerns. The hierarchical macro- and micro-structures of the reinforcing fibers determine the characteristics of fiber–matrix interfaces and performance of the composite. The non-aligned spatial orientation of cellulosic fibers (when used as discontinuous fibers in composites), variability in the fiber length and diameter, and heterogeneity in the chemical composition exert complex effects on the adhesion behavior in composites. Additionally, cellulosic fiber polymer composites exhibit limited interfacial compatibility with polymer matrices due to the hydrophilicity of the reinforcing materials. The review herein presents the dominant adhesion mechanisms of mechanical interlocking, chemical bonding, physical adhesion, and weak boundary layers and their…
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Taxonomy
TopicsNatural Fiber Reinforced Composites · Lignin and Wood Chemistry · Advanced Cellulose Research Studies