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Pervaporation of aqueous ethanol solution by carbon nanotube-infused polyvinyl alcohol membrane supported by polyvinylidene fluoride

Pervaporation of aqueous ethanol solution by carbon nanotube-infused polyvinyl alcohol membrane supported by polyvinylidene fluoride / Nurkhairil Azhar Hashim
Dalam projek ini, membran komposit yang mengandungi kain fabric tanpa tenun dan polivinilidena fluorida (PVDF) sebagai lapisan sokongan, dan poli(vinil alkohol) (PVA) yang digabungkan dengan nanotiub karbon (CNT) sebagai lapisan pemilih telah dihasilkan untuk dehidrasi campuran etanol dan air melalui proses penyejattelapan. Lapisan PVA-CNT telah dihasilkan melalui teknik penuangan larutan acuan dan lapisan sokongan PVDF telah dihasilkan menggunakan kaedah fasa penyongsangan. Keputusan pengimbasan elektron mikroskopi (SEM) menunjukkan bahawa isian CNT telah tersebar dalam polimer PVA matriks. Keputusan darjah pengampulan menunjukkan bahawa CNT dengan kumpulan fungsi hidroksil (-OH) dan karboksil (-COOH) dalam lapisan PVA membantu untuk meningkatkan tahap pengembangan membran. Kajian mekanikal untuk PVA yang digabung dengan CNT mempamerkan kekuatan terikan tertinggi sebanyak 11.6 MPa dan kekuatan tegangan sebanyak 220 %. Keputusan penyejattelapan menunjukkan bahawa membran dengan CNT mempunyai lebih tinggi jumlah fluks, faktor pemisahan dan indeks pengasingan penyejattelapan (PSI) iaitu masing-masing 8, 7 dan 54 kali ganda. _______________________________________________________________________________________________________ In this project, composite membranes containing non-woven cloth and polyvinylidene fluoride (PVDF) as support layer, and poly(vinyl alcohol) (PVA) incorporated with carbon nanotubes (CNT) as a selective layer were prepared for dehydration of ethanol/water mixtures by the pervaporation process. The PVA-CNT layer was fabricated via solution casting technique and the PVDF support layer was fabricated through phase inversion method. The scanning electron microscopy (SEM) results showed that the CNT fillers were dispersed in the PVA polymer matrix. The degree of swelling results showed that the CNT with the hydroxyl (–OH) and carboxyl (–COOH) functional groups in the PVA layer help to increase the degree of swelling of the membranes. The mechanical test results showed that the membrane with the PVA incorporated with CNT exhibited the highest tensile strength of11.6 MPa and strain 25.9 %. The pervaporation results showed that membranes incorporated with CNT have higher total flux, separation factor and pervaporation separation index (PSI) which were 8, 7 and 54 times, respectively.
Contributor(s):
Nurkhairil Azhar Hashim - Author
Primary Item Type:
Final Year Project
Identifiers:
Barcode : 00003107185
Accession Number : 875007305
Language:
English
Subject Keywords:
non-woven cloth; polyvinylidene fluoride; CNT have higher total flux
First presented to the public:
6/1/2017
Original Publication Date:
4/27/2018
Previously Published By:
Universiti Sains Malaysia
Place Of Publication:
School of Chemical Engineering
Citation:
Extents:
Number of Pages - 68
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2018-04-27 17:05:38.8
Date Last Updated
2019-01-07 11:24:32.9118
Submitter:
Mohd Jasnizam Mohd Salleh

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