Izzati, MikeNur (2016) Pengaruh Temperatur Hidrolisis Nata de Coco Terhadap Produk Esterifikasi Menggunakan Asam Palmitat sebagai Bahan Baku Membran. Sarjana thesis, Universitas Brawijaya.
Abstract
Selulosa nata de coco merupakan polimer dari β-glukosa yang terhubung melalui ikatan 1→4 glikosidik. Ikatan tersebut dapat terurai karena hidrolisis dengan bantuan katalis. Pada penelitian ini dipelajari pengaruh temperatur terhadap proses hidrolisis nata de coco secara enzimatis menggunakan enzim hidrolase. Variasi temperatur yang digunakan adalah 28, 34 dan 40°C. Produk hidrolisis dianalisis berdasarkan yield massa produk dan kadar glukosa hidrolisat, ditentukan secara spektrofotometri dengan pereaksi DNS. Reaksi esterifikasi menggunakan asam palmitat selama 3 jam pada temperatur 75°C, dilakukan terhadap produk selulosa terhidrolisis pada temperatur 38,7oC. Karakterisasi selulosa ester didasarkan pada pola spektrum FTIR dan uji swelling. Hasil penelitian menunjukkan peningkatan temperatur menyebabkan yield dan kadar glukosa meningkat, indikasi terjadinya pemutusan rantai panjang, tetapi tidak mengubah struktur kimia selulosa. Produk selulosa ester telah terbentuk, ditunjukkan dengan vibrasi khas gugus fungsi karbonil ester pada bilangan gelombang 1703,03cm-1. Adapun kesetimbangan swelling dicapai pada 27,7 jam dengan derajat swelling 93,8%. Selulosa palmitat yang dihasilkan memiliki potensi sebagai bahan baku membran.
English Abstract
Nata de coco, a polymer of β-glucose which is linked by 1→4 glicosidic bond, can be dissociated through catalytic hydrolysis. The influence of hydrolysis temperature of nata de coco, catalyzed by hydrolase enzyme, has been done. The temperature variation were 28, 34 and 40°C. The hydrolysis product was then characterized based on its mass yield and hydrolisate glucose content, determined spectrophotometrically using DNS reagent. Hereafter, esterification using palmitic acid at temperature of 75°C for 3 hours has been conducted. The hydrolyzed cellulose, produced of 38.7°C, has been used. Furthermore, ester cellulose obtained was characterized by FTIR Spectrum pattern and its swelling index. The result of this study represented that temperature increasing could obtain the increasing both of yield and glucose content. However, although the chain broken has been occurred, its structure was unchanged. In addition, the specific vibration peak of ester carbonyl, C=O functional group, at 1703.03 cm-1, indicating the cellulose ester has been produced. Furthermore, the swelling index of 93.8%, reached at equilibrium time of 27.7, has been obtained. It seem that the cellulose palmitate has potency as a membrane raw material.
| Item Type: | Thesis (Sarjana) |
|---|---|
| Identification Number: | SKR/MIPA/2016/392/051610329 |
| Subjects: | 500 Natural sciences and mathematics > 540 Chemistry and allied sciences |
| Divisions: | Fakultas Matematika dan Ilmu Pengetahuan Alam > Kimia |
| Depositing User: | Kustati |
| Date Deposited: | 02 Nov 2016 15:24 |
| Last Modified: | 02 Nov 2016 15:24 |
| URI: | http://repository.ub.ac.id/id/eprint/154922 |
Actions (login required)
 |
View Item |