Prasetyarani, Rieza Shafianisa and Ilma, Natasya Fitria (2018) Pembuatan Biokomposit Cellulose Acetate/ Poly(L-Lactic Acid) Adsorbent Bead Zat Warna dengan Modifikasi Maleic Anhydride. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Cellulose Acetate (CA) merupakan turunan natural polimer selulosa yang mempunyai banyak kelebihan Salah satu aplikasi dari CA yang saat ini dikembangkan adalah sebagai absorbent bead yang dapat menyerap zat warna. Sedangkan Poly(L-Lactic Acid)(PLLA) merupakan polimer biodegradable (mudah untuk terurai di alam) yang mempunyai sifat biokompalitibilitas dan ketahanan termal yang baik dibandingkan biopolimer lainnya. Pada penelitian yang dilakukan Utami (2017), blending CA/PLLA dapat dibentuk menjadi bead dengan syarat perbandingan berat CA harus lebih besar dibandingkan dengan berat PLLA. Sedangkan pada penelitian yang dilakukan oleh Wicaksono (2017) blending CA/PLLA dengan perbandingan berat 60/40 dengan konsentrasi larutan 10% mampu membentuk bead yang dapat mengadsorp methylene blue dengan kapasitas adsorpsi sebesar 0,342 mg/gr dan % removal sebesar 45,80%. Lebih baik dibandingkan dengan bead dari CA murni, dengan nilai kapasitas adsorpsi terhadap methylene blue sebesar 0,14 mg/gr dan % removal sebesar 5,99%. Guna meningkatkan kompatibilitas antara CA dan PLLA, serta kemampuan adsorpsi bead dalam penelitian ini dilakukan modifikasi pada permukaan PLLA dengan menambahkan komptibilizer berupa PLLA-g-MA. Penelitian ini dilakukan untuk mempelajari pengaruh morfologi, konsentrasi larutan polimer, dan perbandingan rasio berat dari CA/PLLA bead dan CA/[PLLA/PLLA-g-MA] bead terhadap properti dan kinerja adsorpsi bead terhadap zat warna methylene blue. Metode penelitian ini dibagi menjadi dua tahapan yaitu pembuatan kompatibilizer PLLA-g-MA dengan metode grafting dan pembuatan CA/PLLA bead dan CA/[PLLA/PLLA-g-MA] bead dengan metode solvent blending. Analisa yang dilakukan pada penelitian ini adalah FTIR, SEM, BET, dan juga uji spektrofotometer UV-VIS. Dari penelitian yang telah dilakukan, didapatkan hasil bahwa bead dengan konsentrasi larutan 10% mempunyai bentuk yang lebih bulat dibandingkan bead dengan konsentrasi larutan 15%. Selain itu diketahui pula bahwa jumlah PLLA yang ditambahkan berbanding lurus dengan penurunan ukuran bead dan jumlah pori, serta peningkatan diameter pori dan kemampuan adsorpsi. Jika dibandingkan, CA/[PLLA/PLLA-g-MA] bead menunujukkan kemampuan adsorpsi yang lebih baik dibandingkan CA/PLLA bead. Bead dengan kapasitas adsorpsi dan % removal terbaik adalah CA/[PLLA/PLLA-g-MA] 60/40 dengan konsentrasi larutan 15%, yaitu 0,68 mg/g dan 81%.
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Cellulose Acetate (CA) is a natural derivative of cellulose that has many advantages. One of the applications of CA that is currently developed is as an absorbent bead that can absorb the dye. Poly (L-Lactic Acid) (PLLA) is a biodegradable polymer that has excellent biocompalitability and thermal resistance properties compared to other biopolymers. In a study that was conducted by Utami (2017), blending of CA/PLLA could form beads, with the provision of the weight ratio of CA must be greater than the weight ratio of PLLA. Further study was conducted by Wicaksono (2017), the of blending CA/PLLA with weight ratio of 60/40 and 10% of solution concentration was capable of forming beads that can adsorb methylene blue with adsorption capacity of 0.342 mg / gr and % removal of 45.80%. Better than pure CA bead, with an adsorption capacity value of methylene blue was 0.14 mg / g and % removal was 5.99%. In order to improve the compatibility between CA and PLLA, and the bead adsorption performance, in this study the surface of PLLA was modified by adding PLLA-g-MA compibilizer. This study was conducted to study the effect of morphology, polymer solution concentration, and weight ratio of CA/PLLA bead and CA/[PLLA/PLLA-g-MA] bead to the property and adsorption performance of bead. This research method was divided into two stages: the making PLLA-g-MA compatibilizer by grafting technique and the making CA/PLLA bead and CA/[PLLA/PLLA-g-MA] bead by solvent blending technique. Some analysis that were done in this study were FTIR, SEM, BET, and also UV-VIS spectrophotometry test. From the study, it was found that bead with 10% solution concentration had more rounded shape than bead with 15% solution concentration. It was also known that the amount of PLLA added is directly proportional to the decrease in bead size and the number of pores, as well as the increase in pore size and adsorption capacity. When they were being compared, CA/[PLLA/PLLA-g-MA] bead shown better adsorption performance than CA/PLLA bead. Bead with the best adsorption capacity and% removal was CA/[PLLA/PLLA-g-MA] 60/40 with 15% solution concentration, they were 0.68 mg / g and 81%.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSK 660.284 43 Pra p-1 3100018075998 |
| Uncontrolled Keywords: | CA, PLLA, MA, adsroben, bead |
| Subjects: | T Technology > TP Chemical technology > TP1140 Polymers |
| Divisions: | Faculty of Industrial Technology > Chemical Engineering > 24201-(S1) Undergraduate Thesis |
| Depositing User: | Rieza Shafianisa Prasetyarani |
| Date Deposited: | 06 Dec 2020 07:52 |
| Last Modified: | 01 Mar 2021 03:36 |
| URI: | http://repository.its.ac.id/id/eprint/53617 |
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