Fernanda, Moza Ayu (2025) Sintesis Nanokristal Selulosa dari Sekam Padi Menggunakan Hidrolisis Asam Nitrat. Undergraduate thesis, UPN Veteran Jawa Timur.
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Abstract
Rice is a major agricultural commodity. Rice milling generates husks amounting to approximately 20–30% of the grain's weight, yet almost all of this byproduct is discarded. The utilization of husk waste to mitigate environmental impact remains low. However, rice husks are a potential raw material for cellulose nanocrystals due to their high cellulose content. The synthesis process involves three stages: delignification, bleaching, and acid hydrolysis. Delignification is performed using a 17.5% NaOH solution, followed by bleaching with a 10% H2O2 solution. Acid hydrolysis is conducted using nitric acid (HNO3) at varying concentrations (2%, 3%, 4%, 5%, and 6%) and durations (30, 60, 90, 120, and 150 minutes). The products are analyzed via FT-IR and SEM to confirm the presence of cellulose and verify the nanocrystal dimensions. The nitric acid concentration and hydrolysis duration yielding the highest output were 2% and 30 minutes, resulting in cellulose sizes ranging from 7.14 μm to 81 μm. Meanwhile, the smallest cellulose crystal size obtained in this study was 0.93 μm, achieved using a 6% nitric acid concentration and a 150-minute hydrolysis time. However, this size falls within the microcellulose category and has not yet reached the nanoscale.
| Item Type: | Thesis (Undergraduate) | ||||||||
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| Subjects: | T Technology > TP Chemical technology > TP155 Chemical engineering | ||||||||
| Divisions: | Faculty of Engineering > Departement of Chemical Engineering | ||||||||
| Depositing User: | Moza Ayu Fernanda | ||||||||
| Date Deposited: | 23 Jul 2026 08:14 | ||||||||
| Last Modified: | 24 Jul 2026 03:20 | ||||||||
| URI: | https://repository.upnjatim.ac.id/id/eprint/56329 |
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