Nurnayani, Asriyani (2014) WAKTU OPTIMUM ISOLASI NANOKRISTALIN SELULOSA BAKTERIAL DARI LIMBAH KULIT NANAS. S1 thesis, Universitas Pendidikan Indonesia.
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Abstract
Penelitian ini bertujuan untuk mengetahui waktu optimum isolasi nanokristalin selulosa bakterial dari limbah kulit nanas dan memperoleh nanokristalin selulosa bakterial serta karakterisasinya berdasarkan interpretasi data spektroskopi Fourier Transform InfraRed (FTIR), Transmission Electron Microscopy (TEM), dan X-Ray Diffraction (XRD). Sumber selulosa bakterial yang digunakan berasal dari hasil fermentasi bakteri Acetobacter xylinum. Metode yang digunakan untuk isolasi nanokristalin selulosa bakterial dengan cara hidrolisis menggunakan asam sulfat. Beberapa faktor yang mempengaruhi proses hidrolisis diantaranya konsentrasi asam, waktu hidrolisis, rasio selulosa bakterial/asam dan suhu. Variasi waktu hidrolisis selama yaitu 5; 15; 25; 35; dan 45 menit. Hasil penelitian menunjukkan bahwa waktu hidrolisis optimum untuk isolasi nanokristalin selulosa bakterial dari limbah kulit nanas adalah 25 menit. Volume sol koloid nanokristalin selulosa bakterial yang dihasilkan sebanyak 70,20 mL. Hasil FTIR nanokristalin selulosa bakterial menunjukkan kemiripan gugus fungsi dengan selulosa bakterial limbah kulit nanas serta adanya sedikit perubahan struktur akibat perlakuan hidrolisis yaitu munculnya puncak serapan gugus fungsi C=C pada bilangan gelombang 1656,85 – 1627,92 cm-1 dan diperkuat dengan munculnya puncak serapan C-H sp2 vibrasi ulur pada bilangan gelombang 3132,40 cm-1 karena terjadinya proses eliminasi. Hasil TEM menunjukkan ukuran nanokristalin selulosa bakterial yang dihasilkan mempunyai dimensi rerata panjang 200 – 750 nm, lebar 10 – 25 nm dan aspek rasio 10 – 30 dengan bentuk partikel jarum. Besarnya aspek rasio yang didapatkan berpotensi untuk dijadikan reinforcing nanofiller pada polimer. Hasil pengukuran XRD diperoleh derajat kristalinitas sebesar 63,70%. Kata Kunci : nanokristalin bakterial selulosa, bakterial selulosa, hidrolisis asam The aim of this study was to investigate the optimal time for isolation of bacterial cellulose nanocrystalline from pineapple peel waste and develop bacterial cellulose nanocrystalline along with characterization were determined by Fourier Transform Infra Red (FTIR), Transmission Electron Microscopy (TEM), and X-Ray Diffraction (XRD). Bacterial cellulose sources were produced by Acetobacter xylinum. Bacterial cellulose nanocrystalline were obtained by sulfuric acid hydrolysis method. Several parameters were important using the acid hydrolysis method: acid concentration, hydrolysis time, ratio of bacterial cellulose-to-acid, and temperature. Variations of hydrolysis time 5; 15; 25; 35; and 45 minutes. The optimum time for isolation of bacterial cellulose nanocrystalline from pineapple peel waste was 25 minutes. Total volume of colloid bacterial cellulose nanocrystalline was 70.20 mL. Result of FTIR characterization bacterial cellulose nanocrystalline showed the characteristic band functional group of bacterial cellulose from pineapple peel waste and have different structure between bacterial cellulose nanocrystalline and bacterial cellulose due to hydrolysis effect showed band at 1656,85 – 1627,92 cm-1 that C=C bond formation with strong band at 3132,40 cm-1 assigned to C-H sp2 stretching, functional group C=C bond arise due to from elimination. Result of TEM observations showed that the bacterial cellulose nanocrystalline have a size of 200 – 750 nm in length, 10 – 25 nm in width, aspect ratio 10 – 20, and have a rod-like particle. Due to have high aspect ratio these bacterial cellulose nanocrystalline can be use as a reinforcing nano-filler for various composite. Result of XRD pattern showed that degree of crystallinity bacterial cellulose nanocrystalline were 63.70%. Keywords : bacterial cellulose nanocrystalline (BCNC), bacterial cellulose (BC), acid hydrolysis
| Item Type: | Thesis (S1) |
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| Additional Information: | NO. Panggil : S KIM NUR w-2014; Pembimbing : I. Budiman Anwar, II. ahmad Mudzakir |
| Uncontrolled Keywords: | Kata Kunci : nanokristalin bakterial selulosa, bakterial selulosa, hidrolisis asam |
| Subjects: | Q Science > QD Chemistry |
| Divisions: | Fakultas Pendidikan Matematika dan Ilmu Pengetahuan Alam > Jurusan Pendidikan Kimia > Program Studi Pendidikan Kimia |
| Depositing User: | Staf Koordinator 2 |
| Date Deposited: | 27 Jul 2015 08:01 |
| Last Modified: | 27 Jul 2015 08:01 |
| URI: | http://repository.upi.edu/id/eprint/15188 |
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