Abbas, AchmadRoybi (2016) Potensi Selulosa Sitrat dari Nata de Coco sebagai Bahan Baku Material Fungsional. Sarjana thesis, Universitas Brawijaya.
Abstract
Modifikasi selulosa menjadi senyawa turunannya telah banyak dilakukan, antara lain melalui reaksi esterifikasi. Pada penelitian ini reaksi esterifikasi selulosa dilakukan menggunakan asam sitrat. Tujuan dari penelitian adalah mempelajari sifat kimia dan sifat fisik selulosa ester serta mengkaji potensinya sebagai bahan baku membran dan atau sebagai adsorben. Reaksi esterifikasi dilakukan untuk perbandingan massa selulosa dan asam sitrat 1 : 3, pada temperatur 150oC selama 3 jam dengan katalis dibutiltimah oksida. Selulosa sitrat yang terbentuk ditentukan sifat kimianya secara spektrofotometri FTIR dan derajat substitusi (DS) melalui reaksi saponifikasi. Di samping itu, sifat fisik ditentukan melalui penentuan derajat kristalinitas secara difraksi sinar-X (XRD) dan indeks swelling untuk memperkirakan sifat hidrofobisitas. Sebagai pelengkap, potensi selulosa ester untuk material fungsional dikaji berdasarkan sifat kelarutan, berat jenis dan luas permukaan. Hasil esterifikasi membentuk selulosa sitrat dengan derajat substitusi 0,37 dan lebih hidrofob dibandingkan selulosa serta derajat kristalinitas 1,13 kali dibandingkan selulosa. Selulosa sitrat hasil modifikasi selulosa lebih berpotensi digunakan sebagai adsorben dibandingkan sebagai bahan baku membran. Selulosa sitrat sebagai adsorben memiliki angka iodin 0,0167 dengan luas permukaan 14,00 m2/g..
English Abstract
Modification of cellulose into cellulose derivatives has widely been done i.e. through esterification reaction. In this research, esterification using citric acid has been conducted, in order to study its physical and chemical properties. In addition, this research aims were to assess the potential used of cellulose citrate as membrane raw materials and/or adsorbent. Catalytic esterification using dibutyltin oxide at mass ratio of cellulose : citric acid was 1 : 3 has been carried out for 3 hours at temperature of 150oC. Hereafter, chemical properties of cellulose citrate produced i.e. its structure by FTIR spectrophotometry and substitution degree through saponification has been done. Whereas, the physical properties were determined based on crystallinity degree using X-ray Diffraction and swelling index in order to predict its hydrophobicity. Furthermore, its potential as fuctional materials was studied based on solubility, density and surface area. It has resulted that esterification could produce cellulose citrate with substitution degree of 0,357 and it was more hydrophob than cellulose. It has also showed that degree of crystallinty was 1.13 times of cellulose. However, the potential as functional materials was more suitable used as adsorbent rather than membrane raw materials. As an adsorbent, it has iodine number and surface ares of 0.167 and 14 m2/g, respectively.
| Item Type: | Thesis (Sarjana) |
|---|---|
| Identification Number: | SKR/MIPA/2016/318/051610480 |
| Subjects: | 500 Natural sciences and mathematics > 540 Chemistry and allied sciences |
| Divisions: | Fakultas Matematika dan Ilmu Pengetahuan Alam > Kimia |
| Depositing User: | Kustati |
| Date Deposited: | 27 Oct 2016 09:27 |
| Last Modified: | 27 Oct 2016 09:27 |
| URI: | http://repository.ub.ac.id/id/eprint/154840 |
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