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Sains Malaysiana 46(4)(2017): 637–644 http://dx.doi.org/10.17576/jsm-2017-4604-017
Bifunctional Regenerated Cellulose Membrane
Containing TiO2 Nanoparticles for Absorption and Photocatalytic
Decomposition (DwiFungsi Membran Selulosa yang Terjana Semula
dengan Kandungan TiO2 untuk Proses Penyerapan
dan Penguraian
secara Fotopemangkinan) EVYAN YANG
CHIA
YAN1,2, SARANI ZAKARIA1*,
CHIN
HUA
CHIA1
& THOMAS
ROSENAU3 1Bioresources and
Biorefinery Laboratory, School of Applied
Physics, Faculty of Science and Technology,Universiti Kebangsaan Malaysia, 43600 UKM Bangi,
Selangor Darul Ehsan Malaysia 2Department of Applied
Sciences, Faculty of Science and Technology, Nilai
University, 1, Persiaran Universiti,
71800 Nilai, Negeri
Sembilan Darul Khusus, Malaysia 3Division of Chemistry
of Renewable Resource, Muthgasse 18, A-1190
Wien, Universität für
Bodenkultur Wien, University of Natural Resources and Life
Science, Vienn, Austria Diserahkan: 20 April 2016/Diterima: 20 September 2016 ABSTRACT A simple and green method was
presented to embed TiO2 on
regenerated cellulose membranes via cellulose dissolution-regeneration
process. The physical, chemical and mechanical properties of the
composite membranes were characterized by X-ray diffraction (XRD), scanning electron microscopy
(SEM), Fourier- Transform Infrared (FTIR),
ultraviolet (UV) - visible spectroscopy and tensile test. The results
indicated that cotton linter has been converted from cellulose I
to cellulose II after the regeneration process, while the TiO2 nanoparticles
embedded inside the membrane maintaining its original crystal structures.
The TiO2 composite membranes possessed
high ability of water absorption with total pore volume ranged from
0.45±0.01 to 0.53±0.02 cm3/g. The elongation at break of
the prepared membranes increased 29% averagely from dry state to
wet state. The tensile strength of the membranes remained at a minimum
value of 0.50±0.03 MPa in wet state thus enabled the films to withstand
in wet for long period of time under weak UV irradiation. The regenerated cellulose membranes with
TiO2 performed well in photocatalytic
activity while exhibiting distinct absorption abilities. This study
provides a potential application in energy-saving decomposition
system in which the dye compound can be easily removed via two simultaneous
pathways: Absorption and photocatalytic decomposition. Keywords: Absorption; mechanical
properties; photocatalysis; regenerated
celloluse ABSTRAK Kaedah yang mudah telah
dikemukakan untuk menerap TiO2 pada
membran selulosa yang diperbaharui melalui proses pelarutan-penjanaan
semula selulosa. XRD, SEM, FTIR,
Spektroskopi UV - Vis dan mesin ujian tegangan digunakan untuk mencirikan
sifat fizikal, kimia dan mekanik membran komposit. Hasil analisis
menunjukkan linter kapas telah berubah daripada selulosa I kepada
selulosa II selepas proses penjanaan semula. Manakala, TiO2
yang bertabur dalam membran mengekalkan struktur kristalnya.
Membran komposit TiO2
yang dihasilkan memiliki keupayaan penyerapan air
yang tinggi dengan jumlah liang dari 0.45±0.01-0.53±0.02 cm3/g. Keseluruhannya, pemanjangan
membran kering meningkat sebanyak 29% berbanding dengan membran
dalam keadaan basah. Membran yang dihasilkan dapat mengekalkan kekuatan
tegangan pada nilai minimum 0.05±0.03 MPa dalam keadaan basah untuk
tempoh yang panjang di bawah sinaran UV yang lemah. Membran selulosa
berkandungan TiO2
menunjukkan prestasi yang baik dalam aktiviti
foto-pemangkinan sementara mempamerkan
keupayaan penyerapan. Kata kunci: Foto-pemangkinan;
membran terjana semula; penyerapan; sifat mekanik RUJUKAN
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*Pengarang untuk surat-menyurat; email: szakaria@ukm.edu.my
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