Trisnawati, AnggitaDwi (2016) Studi Pengaruh Temperatur pada Esterifikasi Selulosa Nata de coco dengan Asam Propionat. Sarjana thesis, Universitas Brawijaya.
Abstract
Modifikasi selulosa nata de coco menjadi selulosa ester telah dilakukan untuk menghasilkan bahan baku material fungsional. Pada penelitian ini modifikasi selulosa dilakukan melalui reaksi esterifikasi menggunakan asam propionat. Tujuan penelitian ini yaitu mengetahui pengaruh temperatur reaksi terhadap sifat fisikokimia selulosa ester serta mengkaji potensinya sebagai bahan baku membran. Sifat kimia dianalisa secara spektrofotometri FTIR didukung derajat subtitusi. Sedangkan sifat fisik, hidrofobisitas, diuji berdasarkan indeks swelling. Di samping itu, porositas diperkirakan dari berat jenis dan ukuran pori melalui metode bubble point. Hasil interpretasi spektrum FTIR tidak menunjukkan adanya puncak khas vibrasi ulur gugus karbonil ester, karena perolehan dan derajat substitusi sangat rendah. Hasil terbesar dicapai pada temperatur 70˚C, berturut-turut untuk perolehan dan derajat substitusi adalah 17,34% dan 0,130. Produk reaksi masih tidak homogen sehingga korelasi sifat kimia dan sifat fisik produk belum dapat diketahui. Adapun, selulosa ester yang bersifat lebih hidrofob dibandingkan selulosa yaitu produk pada temperatur 50˚C dan 90˚C. Keberadaan pori dengan ukuran pori terbesar 1,34 µm, diperoleh dari hasil reaksi pada temperatur 70˚C, menjadi indikasi potensi selulosa ester untuk dikembangkan sebagai bahan baku ssmembran.
English Abstract
In order to produce a raw functional material, modificationof Nata de coco cellulose into estercellulose has been done. It has been conducted through esterification using propionic acid. This aims research were to investigate the influence of temperature toward ester cellulose physicochemical properties and to assess its potency as membrane raw materials. Chemical properties, analyzed by FTIR spectrophotometry, were then supported by degree of substitution. Whereas, physical properties i.e. hydrophobicity was determined based on swelling index. In addition, its porosity was predicted by density. Meanwhile, pore size by Bubble point methods has been determined. Due to the very low yield percentage and degree of substitution, there is no specific peak of ester carbonyl stretching shown in FTIR interpretated spectrum. The biggest yield percentage and degree of substitution, obtained from 70oC of temperature were 17.34% dan 0.130, succesively. The homogenous reaction product was obtainedyet, therefore,the correlations of chemical and physical properties were still unspecified.Furthermore, comparing to cellulose, the more hydrophobic ester cellulose produced at 50˚C dan 90˚C has been obtained. The presence of pores, which has the largest pore size, was 1.34 µm, resulting from reaction at temperature of 70˚C, indicated that ester cellulose has potency for using as raw membrane material.
| Item Type: | Thesis (Sarjana) |
|---|---|
| Identification Number: | SKR/MIPA/2016/443/051610380 |
| Subjects: | 500 Natural sciences and mathematics > 540 Chemistry and allied sciences |
| Divisions: | Fakultas Matematika dan Ilmu Pengetahuan Alam > Kimia |
| Depositing User: | Kustati |
| Date Deposited: | 08 Nov 2016 14:18 |
| Last Modified: | 08 Nov 2016 14:18 |
| URI: | http://repository.ub.ac.id/id/eprint/154979 |
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