Maulana, Candra (2016) Modifikasi Selulosa Nata de Coco Menggunakan Asam Palmitat dan Uji Potensinya sebagai Bahan Baku Membran. Sarjana thesis, Universitas Brawijaya.
Abstract
Modifikasi nata de coco secara esterifikasi telah dilakukan untuk mengetahui potensinya sebagai bahan baku membran. Pada penelitian telah dilakukan esterifikasi selulosa nata de coco menggunakan asam palmitat dengan katalis dibutil timah oksida. Tujuan penelitian ini adalah untuk menentukan energi aktivasi reaksi, mempelajari perubahan sifat fisikokimia selulosa ester serta mengkaji potensinya sebagai bahan baku membran. Reaksi esterifikasi telah dilakukan dalam reaksi fasa padat selama 3 jam dengan perbandingan massa selulosa : asam palmitat adalah 1 : 5 dan variasi temperatur 45, 60, 75 dan 90 oC. Kajian kinetika dipelajari melalui penentuan sisa asam, dianalisis secara titrasi penetralan. Sifat fisikokimia dianalisis melalui identifikasi gugus fungsi secara spektrofotometri, serta sifat hidrofobisitas didasarkan pada uji swelling. Berdasarkan studi kinetika diperoleh energi aktivasi 2,341 kJ/mol. Hasil analisis struktur menunjukkan telah terbentuk selulosa palmitat ditandai dari adanya puncak khas gugus fungsi karbonil (-C=O) dari ester pada bilangan gelombang 1704,96 cm-1. Selulosa palmitat bersifat lebih hidrofob dibandingkan selulosa serta berpotensi dimanfaatkan sebagai bahan baku membran.
English Abstract
The modification of nata de coco by esterification has been conducted to determine its potential as a membrane raw material. In this research, it has been done using palmitic acid and dibutylin oxide catalyst. This research aims was to determine the activation energy of the reaction, studied the changes in the physicochemical properties of cellulose ester and assess its potential as raw material for the membrane. The esterification was carried out at solid phase reaction, within 3 hours at 45, 60, 75, and 90 oC. Mass ratio of cellulose and palmitic acid was 1 : 5. Kinetics study was determined by the residual acid, analyzed by volumetric neutralization. Physicochemical properties were analyzed through the identification of functional groups by spectrophotometry, and the nature of hydrophobicity based on the swelling test. Based on the study of the kinetics of activation energy obtained 2,341 kJ / mol. Results of the analysis showed the structure has been formed from the palmitic cellulose characterized the typical peak carbonyl functional group (-C=O) from ester at wavenumber 1704,96 cm-1 . Cellulose palmitate is more hydrophobic than cellulose as well as potentially be used as raw material for the membrane.
| Item Type: | Thesis (Sarjana) |
|---|---|
| Identification Number: | SKR/MIPA/2016/354/051610516 |
| Subjects: | 500 Natural sciences and mathematics > 540 Chemistry and allied sciences |
| Divisions: | Fakultas Matematika dan Ilmu Pengetahuan Alam > Kimia |
| Depositing User: | Kustati |
| Date Deposited: | 09 Nov 2016 08:24 |
| Last Modified: | 09 Nov 2016 08:24 |
| URI: | http://repository.ub.ac.id/id/eprint/154880 |
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