Tensile Properties of Kenaf Fiber by Alkalinization Treatment: Effect of different concentration

Ismojo, K. A. Zahidah, E. Yuanita, E. Kustiyah, M. Chalid

Research output: Contribution to journalConference articlepeer-review


The structure that plays an important role in the mechanical properties of natural fibers that will be used as reinforcement in polymer composites is crystalline cellulose. Chemical treatment is one method that is currently widely used for modifying the chemical composition of natural fibers to obtain fibers with high crystalline cellulose content. In this study, alkali treatment with variations in NaOH concentration was used to modify the surface of kenaf fibers. The effect of alkalinization treatment on the tensile properties of kenaf fibers has been carried out. The fiber is soaked in a sodium hydroxide solution with variations in concentrations of 4, 6, 10 and 15% by weight for 3 hours at room temperature and continued with the washing and drying process. Samples were then tested by tensile testing and characterized by using FTIR and FE-SEM instruments. Tensile testing of untreated and treated fiber is carried out 5 times for each variable. Based on the results of these experiments showed an increase in tensile strength of all treated fibers compared to untreated fibers and the highest maximum tensile strength was obtained from the treatment of alkalinization of fibers at a concentration of 10%. This result was also confirmed by the results of FTIR and FE-SEM characterization which have shown a decrease in amorphous content in kenaf fibers and fibrillated bundle fibers into fiber elements.

Original languageEnglish
Article number012030
JournalIOP Conference Series: Materials Science and Engineering
Issue number1
Publication statusPublished - 5 Dec 2019
Event2nd International Conference on Informatics, Technology and Engineering 2019, InCITE 2019 - Bali, Indonesia
Duration: 22 Aug 201923 Aug 2019


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