Projek ini tertumpu pada persiapan dan ciri-ciri yang amonium sulfat difungsikan carbon nanotube multiwalled / poli (vinil alkohol), (SO3-MWCNT / PVA) membran polimer untuk proses membran. Dalam rangka mempelajari pengaruh penambahan SO3-MWCNT dalam membran PVA, tiga jenis membran iaitu membran PVA 5%, 10% membran PVA, 0.01% SO3-MWCNT/10% membran PVA disusun. Pertama, CNT multiwall itu permukaan diubah dengan perlakuan asam menggunakan asid sulfurik diikuti dengan peroksida hidrogen untuk memperkenalkan kumpulan hidroksil dan karboksil di hujung terbuka dan laman cacat dari MWCNTs yang dapat meningkatkan dispersi dalam larutan PVA berair. Dispersi SO3-MWCNT dalam larutan PVA semakin ditingkatkan oleh untrasonicater. Para MWCNTs disifatkan dengan Fourier transform spektrometer IR (FTIR). Data membuktikan bahawa MWCNT itu berjaya difungsikan dengan kumpulan sulfonik pada 1111 cm-1, dan 601 cm-1 wavenumbers. The 5% PVA, 10% PVA dan SO3-MWCNT / membran PVA dibuat dengan menggunakan teknik penyelesaian casting. Kekuatan mekanik membran dipelajari melalui uji tarik. Keputusan kajian menunjukkan bahawa modulus Young terhadap membran PVA meningkat sebanyak 542% selepas MWCNT 0.01% tambahan SO3-. Sementara itu Young modulus membran PVA meningkat 25% ketika peratus berat PVA meningkat dari 5% sampai 10%. Namun, penurunan fleksibiliti membran ini diamati. Penambahan SO3-MWCNT memiliki sifat mekanik yang sangat baik. Darjah pembengkakan membran diuji dengan cara merendam membran dalam air, gliserol, methanol, metil ester dan minyak soya. Didapati bahawa tahap pembengkakan pada membran PVA selepas penambahan 0.01%-MWCNT SO3 dalam air menurun sekitar 76.6%, sedangkan untuk tahap pembengkakan membran meningkat 60% ketika peratus berat PVA meningkat dari 5% sampai 10 %. The SO3-MWCNT/10 0,015%% membran PVA akan menjalani percubaan pervaporasi untuk konsentrasi umpan gliserol 40% dan air 60%. Namun sisi permeat ialah 20 wt% gliserol dan 80 wt% air. Keputusan kajian membuktikan bahawa SO3-MWCNT / PVA boleh digunakan untuk memisahkan gliserol dan air yang dihasilkan dalam proses tranesterification.
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This project focuses on the preparation and characterization of the ammonium sulphate functionalized multiwalled carbon nanotube/poly (vinyl alcohol), (SO3- MWCNT/PVA) polymeric membranes for the pervaporation process. In order to study the effect of the addition of SO3- MWCNT in PVA membrane, three different types of membranes namely 5% PVA membrane, 10% PVA membrane, 0.01%SO3- MWCNT/10%PVA membranes were prepared. Firstly the multiwall CNTs were surface modified by acid treatment using sulfuric acid followed by hydrogen peroxide to introduce hydroxyl and carboxyl groups at the open ends and the defect sites of MWCNTs which could enhance the dispersion in the aqueous PVA solutions. Dispersion of SO3- MWCNT in PVA solution was further enhanced by untrasonicater. The MWCNTs were characterized with Fourier transform infrared spectrometer (FTIR). The data proved that the MWCNT were successfully functionalized with sulfonic group at the 1111 cm-1, and 601 cm-1 wavenumbers. The 5% PVA, 10% PVA and SO3- MWCNT/PVA membranes were prepared by using solution casting technique. The mechanical strength of the membrane was studied via tensile test. The result showed that the Young’s modulus of PVA membrane increased by 542% after the additional 0.01%SO3- MWCNT. Meanwhile the Young’s modulus of PVA membrane increased 25% when the weight percent of PVA increased from 5% to 10%. However, a decrease in the flexibility of this membrane was observed. The additional of SO3-MWCNT possess excellent mechanical properties. The degrees of swelling of the membranes were tested by immersing the membranes in water, glycerol, methanol, methyl ester and soybean oil. It was found that the degree of swelling of the PVA membranes after the addition of 0.01%SO3-MWCNT in the water decreased approximately to 76.6% while the degree of swelling membrane increased 60% when the weight percent of PVA increased from 5% to 10%. The 0.015%SO3-MWCNT/10%PVA membrane will underwent the pervaporation experiment for feed concentration of 40% glycerol and 60% water. However the permeate side were 20 wt% glycerol and 80 wt% water. The result proved that the SO3- MWCNT/PVA can be use to separate glycerol and water produced in tranesterification process.
Synthesis of poly (vinyl alcohol) carbon nanotube membrane for pervaporation process_Nazrah Mohamad Badaruddin_K4_2011_875003852_NI