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Kenaf Fiber Properties and Uses The Stricker

Kenaf Fiber Properties and Uses

Kenaf is a bast fiber. This article is about Kenaf Fiber Properties and Uses. Along with the cultivation of kenaf and application to biodegradable composite materials.

Properties of Kenaf Fiber

Tensile tests of kenaf fiber with different characteristics were carried out and their potential application to the reinforcement of FRP was conducted.

Specifically, the effect of stem diameter and length on the mechanical properties of kenaf fiber of different types was investigated.

In addition, after converting kenaf fibers into pulp, the cellulose content ratios and extent of polymerization within the fibers were measured to investigate their influence on the tensile strength of the fibers.

Read: Properties and Uses of Coffee Ground Fiber

The tensile strength of kenaf fiber was observed to increase with the length of the stem. Moreover, at approximately 48%, the ratio of cellulose contained in kenaf fiber was found to be stable regardless of the length and diameter of the kenaf stem.

Cellulose DP in kenaf fibers was observed to change depending on the tensile strength of the fiber and longer kenaf fibers were found to have relatively higher tensile strengths and cellulose DP.

Kenaf Fiber Properties and Uses

Kenaf Fiber Characteristics

Fiber length
1.28 2.6 0.6
20 30
Lignin (%) 13.2 7.7 17.4


Uses of Kenaf Fiber

Kenaf fiber (Hibiscus cannabinus L.) is a type of natural fiber offering many advantages and high potential as reinforcement in composite materials, especially polymer composites.

Conventionally, synthetic fibers such as carbon, glass, and aramid are commonly used in the production of polymer composites, but kenaf fibers have comparable specific properties and relatively low processing costs favoring their substitution for conventional synthetic fibers.

Read: Coir Fiber-Manufacturing Process | Properties & Uses

Kenaf fibers may be modified either physically or chemically and used for either thermoset or thermoplastic polymer systems. Fields of use for kenaf fiber-reinforced composites include construction, automotive, corrosion resistance, electrical, marine, and transportation.

Composite of Kenaf Fiber

The unidirectional biodegradable composite materials were made from kenaf fibers and an emulsion-type PLA resin.

Thermal analysis of kenaf fibers revealed that the tensile strength of kenaf fibers decreased when kept at 180 °C for 60 min.

Read: Roselle Fiber Properties and Uses

Therefore, biodegradable composites were fabricated at a molding temperature of 160 °C. The unidirectional fiber-reinforced composites showed tensile and flexural strengths of 223 MPa and 254 MPa, respectively.

Moreover, tensile and flexural strength and elastic moduli of the kenaf fiber-reinforced composites increased linearly up to fiber content of 50%.

The biodegradability of kenaf/PLA composites was examined for four weeks using a garbage-processing machine.

Experimental results showed that the weight of composites decreased by 38% after four weeks of composting.

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