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All Journal Marine Fisheries: Jurnal Teknologi dan Manajemen Perikanan Laut Jurnal Pengolahan Hasil Perikanan Indonesia Jurnal Sains Materi Indonesia agriTECH Science and Technology Indonesia Industria: Jurnal Teknologi dan Manajemen Agroindustri Syntax Literate: Jurnal Ilmiah Indonesia Squalen Bulletin of Marine and Fisheries Postharvest and Biotechnology Indonesian Journal of Chemistry Jurnal Kebijakan Perikanan Indonesia International Journal of Supply Chain Management Jurnal Pascapanen dan Bioteknologi Kelautan dan Perikanan Management Studies and Entrepreneurship Journal (MSEJ)
Hari Eko Irianto
Balai Besar Penelitian Dan Pengembangan Pengolahan Produk Dan Bioteknologi Kelautan Dan Perikanan, Jl. KS. Tubun, Petamburan VI, Slipi, Jakarta
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Characterization of Cellulose Fibers Extracted from Ulva lactuca with Various NaOH Concentrations Irianto, Hari Eko; Rachmana, Alfitra Raya; Nurhayati, Nurhayati; Fransiska, Dina; Amanda, Putri; Haryati, Sakinah; Aditia, Rifki Prayoga; Suah, Faiz Bukhari Mohd
Squalen, Buletin Pascapanen dan Bioteknologi Kelautan dan Perikanan Vol 20, No 3 (2025): December 2025
Publisher : :Agency for Marine and Fisheries Research and Human Resources, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/squalen.1055

Abstract

As demand for sustainable biopolymers is growing, Ulva lactuca has emerged as a promising macroalgal source of cellulose. Alkaline hydrolysis using sodium hydroxide (NaOH) is widely applied in cellulose extraction to remove lignin; however, the influence of NaOH concentration during delignification process of U. lactuca remains insufficiently understood. This study aimed to identify the optimal NaOH concentration for cellulose extraction from U. lactuca and to characterize the resulting fibers. Alkaline treatments were performed using NaOH concentrations of 10%, 20%, 30%, and 40%. The extracted cellulose was evaluated for yield, functional groups, thermal stability, crystallinity index (CrI), and morphology using FTIR, XRD, simultaneous thermal analysis, and FE-SEM. Results showed that cellulose yields ranged from 4.38% to 5.44%, with no significant differences among treatments. In contrast, NaOH concentration significantly affected cellulose morphology, with enhanced delignification and fibrillar refinement observed at higher alkali levels. FTIR spectra confirmed cellulose purity through characteristic O–H and C–H stretching vibrations, β-glycosidic linkages, and the absence of hemicellulose-related peaks. XRD analysis showed that 30% NaOH treatment produced the highest CrI (84.09%), while higher concentrations induced structural degradation. Thermal analysis revealed a two-stage degradation process, consisting of moisture loss at 120–150 °C followed by major cellulose decomposition at 250–300 °C. Overall, 30% NaOH was identified as the optimal concentration for extracting α-cellulose from U. lactuca.
Co-Authors Achmad Poernomo Agusman Agusman Agusman, Agusman Akbar Hanif Dawam Abdullah Ali Suman Alifah, Reza Nur Amanda, Putri Anja Meryandini Ausias, Gilles Azizah Intan Pangesty Batubara, Siti Chairiyah Chalid, Muchamad Dedi Fardiaz Dedi Supriadi Dewi Seswita Zilda Diah Lestari Ayudiarti Dian Dwi Putri Diana Natalia Dina Fransiska Djagal Wiseso Marseno Djagal Wiseso Marseno Dwiyitno Dwiyitno El-Ghifary, Muhammad Ghufron Ema Hastarini Eni Harmayani Erislan, Erislan farida ariyani Fayakun Satria Fransiska, Dina Gintung Patantis Gintung Patantis Hanifah Nuryani Lioe Hastiana, Sabina Ifah Munifah Ifah Munifah Ijah Muljanah Ikasari, Diah Indrati, Retno JAKA WIDADA Jamal Basmal, Jamal Jan Schwarzbauer Khairul Amri Kusumaningrum, Wida Banar Laksono Trisnantoro Larissa Dsikowitzky Lumanauw, Jimmy M. Syamsul Maarif Marimin , Mochamad Chalid Muljanah, Ijah Nurhayati Nurhayati Nurhayati Nurhayati Nurhayati Nuri Andarwulan Nurul Hak Panji Priambudi Poetri, Tika Annisa Eka Putri Putih Puspa Asri Rachmana, Alfitra Raya Rifki Prayoga Aditia Rini Riastuti, Rini Rinta Kusumawati, Rinta Rizal Syarief Rodiah Nurbaya Sari Rossy Choerun Nissa Roziafanto, Ahmad Nandang Sakinah Haryati Salampessy, Randi Bokhy Syuliana Sidartha, B. Boy Rahardjo Siti Zahro Nurbani Slamet Budhijanto Sri Marliah Suah, Faiz Bukhari Mohd Subaryono Subaryono, Subaryono Sugiarto S Sukarno Sukarno Suryaningrum, Theresia Dwi Suryanti Suryanti Suryanti Suryanti Suryanti Suryanti Suryanti Syamsiar, Syamsiar Tazwir Tazwir Titi Candra Sunarti Tri Wulandari Widya Asmara Yusro Nuri Fawzya Yusro Nuri Fawzya Zilda, Dewi Zeswita