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Sains Malaysiana 51(8)(2022):
http://doi.org/10.17576/jsm-2022-5108-10
The
Effects of Monosaccharides on The Physico-Electrochemical
Properties of Chitosan Based Solid Polymer Electrolytes (SPEs)
(Kesan Monosakarida terhadap Sifat Fiziko-Elektrokimia bagi Elektrolit Polimer Pepejal Berasaskan Kitosan (SPEs))
NURUL IFFAH ISMAIL1,
SAIYIDAH NAFISAH SAIDIN1, NUR HANI RA’IL1, AZIZAN AHMAD1,2 & NADHRATUN NAIIM MOBARAK1,2*
1Department
of Chemical Sciences, Faculty of Science & Technology, Universiti Kebangsaan Malaysia, 43600 UKM Bangi,
Selangor Darul Ehsan, Malaysia
2Polymer
Research Center (PORCE), Universiti Kebangsaan Malaysia, 43600 UKM Bangi,
Selangor Darul Ehsan, Malaysia
Diserahkan:
22 Oktober 2021/Diterima:
20 Januari 2022
ABSTRACT
Monosaccharides have
shown their potential as plasticizers in solid polymer electrolytes (SPEs) due
to the presence of numerous hydroxyl (OH) functioning groups. Glucose and
fructose were used in this study. The effect of monosaccharides on physico-electrochemical properties of solid polymer
electrolytes based on chitosan have been studied. Chitosan-based polymer
electrolytes have been successfully plasticized using a solution-casting
technique at six different weight percentages (0-30 wt.%). The result shows that
15 wt.% was the highest ionic conductivity achieved by both chitosan-glucose
(CG) and chitosan-fructose (CF) systems. Lithium transference number (TLi+) analysis showed that CF had a high number of
lithium ions compared to the CG system, with values of 0.26 and 0.14,
respectively. In addition, Linear Sweep Voltammetry (LSV) analysis shows that
the electrochemical stability for the CG system was 2.98 V compared to 3.20 V
for the CF system. This discovery demonstrates that monosaccharides have the
potential to be used as plasticizers due to the presence of several oxygen
atoms in the structure, which act as a coordination site for cation interaction
and can also improve the ion mobility and ionic conductivity of chitosan-based
solid polymer electrolytes.
Keywords: Chitosan; ionic conductivity; monosaccharides; plasticizer;
polymer electrolyte
ABSTRAK
Monosakarida menunjukkan potensi sebagai bahan pemplastik dalam aplikasi elektrolit polimer pepejal disebabkan oleh kehadiran kumpulan berfungsi hidroksil (OH) yang banyak. Kehadiran kumpulan hidroksil yang mempunyai pasangan elektron terpencil ini mampu bertindak sebagai tapak aktif untuk berinteraksi dengan kation dan dalam kajian ini, glukosa dan fruktosa telah dipilih. Kesan monosakarida sebagai bahan pemplastik berasaskan kitosan terhadap sifat fiziko-elektrokimia telah dikaji. Elektrolit polimer pepejal berasaskan kitosan telah berjaya dihasilkan dengan menggunakan teknik pengacuan larutan dengan menggunakan peratusan monosakarida yang berbeza (0-30 bt. %). Hasil kajian mendapati nilai kekonduksian tertinggi dicapai pada 15 bt. % bagi sistem kitosan-glukosa (CG) dan kitosan-fruktosa (CF). Analisis nombor pengangkutan litium menunjukkan sistem CF mempunyai bilangan ion litium yang tinggi berbanding sistem CG dengan nilai masing-masing 0.26 dan 0.14. Selain itu, analisis LSV menunjukkan elektrolit polimer pepejal berasaskan kitosan ini memberikan kestabilan elektrokimia sehingga 2.98 V bagi sistem CG dan 3.20 V bagi sistem CF. Keputusan kajian yang diperoleh ini menunjukkan monosakarida berpotensi untuk digunakan sebagai bahan pemplastik kerana kehadiran beberapa atom oksigen dalam struktur monosakarida yang bertindak sebagai tapak aktif untuk berinteraksi dengan kation yang seterusnya dapat meningkatkan mobiliti ion dan kekonduksian ion elektrolit polimer pepejal berasaskan kitosan.
Kata kunci: Bahan pemplastik; elektrolit polimer; kekonduksian ion; kitosan; monosakrida
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*Pengarang untuk surat-menyurat; email: nadhratunnaiim@ukm.edu.my
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