Nasmi Herlina Sari This email address is being protected from spambots. You need JavaScript enabled to view it.1, Edi Syafri2, Suteja1, Widya Fatriasari3, and Azizatul Karimah3

1Department of Mechanical Engineering, Faculty of Engineering, University of Mataram, Mataram, West Nusa Tenggara 83125, Indonesia
2Department of Agricultural Technology, Politeknik Pertanian Negeri Payakumbuh, Payakumbuh, West Sumatera 26271, Indonesia
3Research Center for Biomass and Bioproducts, National Research and Innovation Agency (BRIN), Jl. Raya Bogor Km 46, Cibinong, Bogor 16911, Indonesia


Received: September 20, 2022
Accepted: November 28, 2022
Publication Date: February 9, 2023

 Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.

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Fiber derived from the plant Paederia Foetida stems (PF) is a novel natural fiber with the capacity to replace glass fibers in composite reinforcement. The technique of modifying the fiber surface with NaOH and KOH is simple and straightforward, generating properties that differ from the raw fiber. Therefore, this study aims to investigate the effects of NaOH and KOH treatments on the surface of Paederia foetida fiber (PFs) in relation to the physical, crystal structure, functional groups, tensile strength, thermal and morphological properties compared to raw PFs. The raw fiber was obtained by soaking the PFs rods in water for 10 days, followed by surface treatment with a solution of NaOH and KOH. The results showed that compared to raw fiber, after NaOH dan KOH treated PFs, the diameter and moisture content of the PFs decreased, while the tensile strength increased significantly by 43.27%, and good thermal stability. The highest crystallinity index was obtained from KOH-treated PFs of 79.685%. According to the functional groups in the FTIR observations, NaOH treatment was found to be more effective in removing lignin and hemicellulose components, as well as increasing cellulose compounds in the fiber. The surface morphology was found to be rougher with the loss of impurities after NaOH treatment. Based on the results, raw, NaOH and KOH-treated PFs have the potential to be used as reinforcement for lightweight composite and alternative materials to replace glass fiber and coconut fiber in construction applications.

Keywords: Chemical; KOH; mechanical properties; NaOH; Paederia foetida fiber (PFs); physical properties


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