Characteristics of hybrid composites of coconut coir and arenga fibers on the alkalization process using NaOH. Seminar Nasional Tahunan - Teknik Mesin [Internet]. 2026 Mar. 9 [cited 2026 Jun. 26];23(1):26-32. Available from: https://snttm.bkstm.org/index.php/SNTTM/article/view/109