A Review on the Effect of Various Chemical Treatments on the Mechanical Properties of Renewable Fiber-Reinforced Composites

Table 9

Effect of isocyanate treatment on various biofibers.

S. no.	Fibers used	Type of chemical treatment	Effects	Ref.
1	Oil palm	Isocyanate treatment	At 40% fiber loading exhibited higher moisture absorption (280%) compared to other treatments.	[153]
2	Sisal	Isocyanate treatment	The treatment exhibited superior tensile properties than alkaline and untreated fibers but with decrease in dielectric constant.	[107, 146]
3	Pineapple leaf	Isocyanate treatment	The treatment reduced hydrophilic tendency of the fiber compared to silane-treated composites. Reduction in % of crystallinity leads to increase in tensile strength.	[136]
4	Jute/hemp/flax	Isocyanate treatment	The treatment increased stiffness and reduction in impact by 17%.	[31]
5	Fibrous cellulose	Isocyanate treatment	The treatment shows enhanced tensile, elongation, and interfacial adhesion.	[160]
6	Kenaf	Isocyanate treatment	The presence of isocyanate hydrolysis to urea, reacting with hydroxyl group of fiber, decreases the moisture absorption and increases the mechanical properties.	[72]
7	Sisal	Isocyanate treatment	Improvement in tensile strength	[161]