Effect Of Tannic Acid-Trimesoyl Chloride On Thin Film Composite Membrane
Membran komposit filem nipis telah disediakan melalui proses sintesis antara larutan asid tannik dalam fasa cecair dan trimesoil klorida dalam fasa organik. Hasil kajian daripda penyelidik sebelum ini seperti Zhang et., al (2013) dan Tang et., al (20008) menunjukkan isu pengotoran dan kestabilan...
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| Format: | Thesis |
| Language: | English |
| Published: |
2018
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| Subjects: | |
| Online Access: | http://eprints.usm.my/44293/1/Effect%20Of%20Tannic%20Acid-Trimesoyl%20Chloride%20On%20Thin%20Film%20Composite%20Membrane.pdf http://eprints.usm.my/44293/ |
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| Summary: | Membran komposit filem nipis telah disediakan melalui proses sintesis antara
larutan asid tannik dalam fasa cecair dan trimesoil klorida dalam fasa organik. Hasil
kajian daripda penyelidik sebelum ini seperti Zhang et., al (2013) dan Tang et., al
(20008) menunjukkan isu pengotoran dan kestabilan khususnya pada membran UF
ketika proses penurasan protein. Oleh itu, teknik pempolimeran antara lapisan muka
(IP) telah digunakan untuk mengkaji hubungan diantara kesan asid tannik dan
trimesoil klorida terhadap prestasi rintangan kadar pencemaran, hidrofilik dan sifat
pemisahan air pada membran komposit filem nipis. Fungsi asid tannik dan trimesoil
klorida (TA-TMC) dengan tahap kepekatan berbeza pada sifat-sifat membran seperti
ikatan kimia, morfologi, kekasaran permukaan, sifat hidrofilik dan prestasi ketelepan
air serta penolakan protein (Albumin serum bovin dan Lisozim) juga turut dikaji.
Keputusan menunjukkan bahawa peningkatan kepekatan asid tannik dan trimesoil
klorida semasa proses pempolimeran antara muka dapat mengurangkan kekasaran
permukaan dan mengurangkan kerosakan pada permukaan membran komposit akibat
tindak balas pempolimeran yang berlebihan. Selain itu, pembentukan lapisan
poliester juga didapati boleh mempengaruhi tahap sifat hidrofilik, tahap kadar
pencemaran dan ujian prestasi membran. Secara kesuluruhannya, keputusan prestasi
terbaik keseluruhan telah dicapai menggunakan membran komposit yang dihasilkan
dengan kadar kepekatan 0.5 g/L asid tannik dan 0.3g/L trimesoil klorida yang
seterusnya membawa kepada fluks air tulen sebanyak 114.16 Lm-2h-1 serta
penolakan BSA dan Lisozim masing-masing sebanyak 98% dan 94%. Dalam kajian
ini, kesan kepekatan asid tannik dan trimesoil klorida (TA-TMC) pada sifat hidrofilik
membran dikaji. Proses pempolimeran semakin meningkat ekoran daripda
peningkatan kepekatan asid tannik dan trimesoil klorida (TA-TMC) yang seterusnya
menghasilkan nilai hydrofilik dengan lebih baik iaitu 29.70 serta memberi
penambahbaikan pada kekasaran lapisan dengan struktur yang lebih sekata dari 73.96
nm kepada 30.07 nm. Penggunaan kepekatan asid tannik dan trimesoil klorida (TATMC)
yang berbeza juga memberi kesan kepada kadar tindak balas yang berlaku
pada permukaan membran seterusnya menyumbang kepada pembentukan kumpulan
ester dan regangan O-H yang dapat diperhatikan dengan lebih jelas apabila
kepekatan asid tannik dan trimesoil klorida (TA-TMC) meningkat.
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A thin film composite membrane was prepared by synthesized the reacting
tannic acid aqueous solution and trimesoyl chloride in organic phase. Previous
research shows that fouling and stability issue on the UF membrane particularly
during filtration of protein. Therefore, interfacial polymerization (IP) technique was
employed to investigate the effect of tannic acid and trimesoyl chloride on the
performances of anti-fouling resistance, hydrophilicity and permeation properties of
thin film composite membrane. The role of tannic acid and trimesoyl chloride (TATMC)
with various concentrations on membrane properties such as chemical
bonding properties, morphology, surface roughness, hydrophilicity,and performance
in term of water permeability and protein rejection (Bovine serum albumin and
Lysozyme) were investigated, respectively. The results revealed that the increasing
on the concentration of monomer during interfacial polymerization process could
reduce the surface roughness and reduce the defect on the surface of composite
membrane due to the intense polymerization reaction. Furthermore, the formation of
polyester selective skin layer was also found to influence the hydrophilicity, fouling
property and membrane performances tests. The best overall performance result were
achieved with composite membrane produced by 0.5 g/L tannic acid and 0.3 g/L
trimesoyl chloride leading to a pure water flux of 114.16 Lm-2h-1 and, BSA and
Lysozyme rejection of 98 % and 94%, respectively. The effect of tannic acid and
trimesoyl chloride (TA-TMC) on hydrophilicity of membrane is studied as well.
Further polymerization process with increasing the tannic acid concentration (TA)
improved the hydrophilicity to 29.70 and improved the roughness of layer with a
more uniform structure from 73.96 nm to 30.07 nm. Different concentration of
monomers (tannic acid and TMC) used also affect the different rates of cross-linking
occurred on the surface of membrane that contribute towards the formation peak of
ester group and O-H stretch which more clearly observed as the concentration of
tannic acid and trimesoyl chloride (TA-TMC) increased. |
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