Fitri, Shatila Jihadiyah (2016) Preparasi Membran Polivinilidin Fluorida/Selulosa Asetat Dengan Penambahan Aditif Polietilen Glikol Untuk Penjernihan Jus Apel. Undergraduate thesis, Institut Technology Sepuluh Nopember.
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Abstract
Membran Polivinilidin Fluorida (PVDF)/Selulosa Asetat
(SA) dengan penambahan polietilen glikol (PEG) sebagai aditif
pada larutan cetak telah berhasil disintesis, performa membran
dan aplikasinya untuk mereduksi warna coklat pada jus apel.
Preparasi dilakukan dengan mereaksikan SA dan PVDF dalam
larutan dimetilasetamida (DMAc) serta aditif PEG pada suhu 60
°C selama 24 jam. Variasi dilakukan pada persentase berat PEG
yang ditambahkan, yaitu 0, 1%, 3%, dan 5%. Penambahan PEG
menyebabkan kenaikan porositas, fluks, dan penurunan rejeksi
membran. Hasil karakterisasi morfologi dengan Scanning
Electron Microscope (SEM), Atomic Force Microscope (AFM),
dan Fourier Transform Infrared (FTIR) menunjukkan adanya
peningkatan ukuran pori, persebaran pori, dan kekasaran
permukaan. Uji kekeruhan memperlihatkan hasil dengan jus apel
yang lebih 95,1% pada membran dengan penambahan PEG
sebanyak 1%.
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Polyvinylidene Fluoride (PVDF)/Cellulose Acetate (CA)
blend membrane with polyethylene (PEG) addition of casting
solution were synthesized to determine its morphology and
application to reduce the brown colour of apple juice. The
membranes were prepared from blends of CA and PVDF,
dimethylacetamide (DMAc) as solvent, PEG as additive, to be
reacted as in 60 0C for 24 hours. The variation of PEG weight
percentage were 0, 1%, 3%, and 5%. The addition of PEG
increased porosity, fluks, and decreased membran rejection.
Scanning Electron Microscope (SEM), Atomic Force Microscope
(AFM), and Fourier Transform Infrared (FTIR) were applied to
evaluate the morphology of membranes, which investigated
increasing of pore size, pore distribution, and surface roughness.
Clarification by membrane with 1% PEG was obtained 95,1%
clearer than the pure sample.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSKi 541.335 Fit p-1 |
| Uncontrolled Keywords: | PVDF, Selulosa Asetat, PEG,, Pencoklatan Apel, Membran blend |
| Subjects: | Q Science > QD Chemistry > QD547 Flocculation, precipitation, adsorption, etc. |
| Divisions: | Faculty of Mathematics and Science > Chemistry > 47201-(S1) Undergraduate Thesis |
| Depositing User: | Mr. Tondo Indra Nyata |
| Date Deposited: | 22 Jan 2020 08:38 |
| Last Modified: | 22 Jan 2020 08:38 |
| URI: | http://repository.its.ac.id/id/eprint/72908 |
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