Nabila Fardina Idrus, Fatma Aulia, Sheila Rizkia Az Zahra, Sri Aprilia, Z. Zuhra
Indonesian Indonesian synthetic leather industry is experiencing significant growth. However, traditional manufacturing processes often use harmful chemicals that damage ecosystems. This research explores an eco-friendly alternative by valorizing coffee grounds and biosilica extracted from sugarcane bagasse to produce synthetic leather. The study prepared sugarcane bagasse by extracting silica with NaOH and neutralizing it with HCl. Synthetic leather samples were created with varying compositions of silica and coffee grounds (3.5, 5.5, and 7.5 grams). Findings revealed Si-O-Si bonds and silanol groups in biosilica, while XRD analysis confirmed the amorphous SiO2 phase. FTIR analysis of silica-incorporated synthetic leather detected an SO2 group at 1169 cm-1, absent in non-silica samples. SEM analysis showed that silica-incorporated samples had a uniform, smooth morphology with fine porosity, while non-silica specimens exhibited a coarser surface with larger pores. Tensile strength analysis demonstrated higher Modulus of Elasticity (MOE) in samples without silica, but generally higher Modulus of Rupture (MOR) values in silica-incorporated samples. The combination of coffee grounds and biosilica offers a promising approach to producing high-quality synthetic leather with enhanced performance, presenting an environmentally friendly alternative in utilizes waste materials. © 2026 Author(s)
Department of Chemical Engineering, Engineering Faculty, Universitas Syiah Kuala, Darussalam, Banda Aceh, 23111, Indonesia
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