| Autor: |
Wibowo, Arie, Santoso, Rachmad, Wiguna, I. Gede Bagus Eka Saputra, Judawisastra, Hermawan, Budhi, Yogi Wibisono |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings; 2024, Vol. 3027 Issue 1, p1-4, 4p |
| Abstrakt: |
Cellulose nano crystals (CNCs) are attractive green nanomaterials due to their appealing properties such as low density, high mechanical properties, high surface area, biocompatible and low toxicity. However, highly corrosive acids are commonly used to extract CNCs from lignocellulosic materials with multiple pretreatment steps to remove their non-cellulosic constituent. In this work, CNCs were isolated from water hyacinth (Eichhornia crassipes) as alternative raw materials using ammonium persulfate oxidation method that offers direct extraction of CNCs from their raw materials without pretreatment step. In this study, the processing temperatures were varied from 50 – 80 °C and the processing times were varied from 5 – 15 hours to investigate the optimum condition for CNCs preparation from water hyacinth. Visual observations showed that white solution was obtained at higher temperature and processing time. Fourier transform infra-red (FTIR) results revealed that the amount of carboxylate functional group in sample that was prepared at 80 °C is higher than sample that was prepared at 70 °C, implying that oxidation process of water hyacinth at 80 °C is better than 70 °C. X-Ray diffraction (XRD) results showed that CNCs might be obtained in sample at 80 °C, since their crystallinity index (61.7%) is higher than 54%. Transmission electron microscopy (TEM) observation unveiled that needle-like materials with diameter 6.9±2.5 nm and length 117.7±29.0 nm were observed, indicating CNCs were successfully formed in sample that was prepared at 80 °C for 15 hours. Successful preparation of nano sized CNCs are important features for their potential application as catalyst support by providing high surface area for deposition of catalyst. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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