Papers by Siti Rudhziah Binti Che Balian
A cellulose derivative, carboxymethyl cellulose (CMC), was synthesized by the reaction of cellulo... more A cellulose derivative, carboxymethyl cellulose (CMC), was synthesized by the reaction of cellulose from kenaf bast fiber with monochloroacetic acid. A series of biopolymer electrolytes comprised of the synthesized CMC and ammonium acetate (CH 3 COONH 4 ) were prepared by the solution-casting technique. The biopolymer-based electrolyte films were characterized by Fourier Transform Infrared spectroscopy to investigate the formation of the CMC-CH 3 COONH 4 complexes. Electrochemical impedance spectroscopy was conducted to obtain their ionic conductivities. The highest conductivity at ambient temperature of 5.77 × 10 −4 S cm −1 was obtained for the electrolyte film containing 20 wt% of CH 3 COONH 4 . The biopolymer electrolyte film also exhibited electrochemical stability up to 2.5 V. These results indicated that the biopolymer electrolyte has great potential for applications to electrochemical devices, such as proton batteries and solar cells.
tIn this study, new biopolymer blend based on kappa-carrageenan and cellulose derivatives were pr... more tIn this study, new biopolymer blend based on kappa-carrageenan and cellulose derivatives were pre-pared using solution casting technique. The cellulose derivative, carboxymethyl cellulose was producedfrom cellulose extracted from kenaf fibres. The cellulose derivative was blended with different wt% ofkappa-carrageenan derivative to obtain free standing films. The properties of the prepared blend filmswere subjected to fourier transform infrared characterization, tensile test, scanning electron microscopy,dynamic mechanical analysis, electrochemical impedance spectroscopy and linear sweep voltammetryto investigate their structural, mechanical, viscoelastic and electrical behaviour. The FTIR result demon-strated that both polymers are compatible with each other. The mechanical properties of carboxymethylkappa-carrageenan were enhanced with the addition of carboxymethyl cellulose. The polymer blendwith wt% ratio of 60:40 yielded the most conductive film with conductivity of 3.25 × 10−4S cm−1and isexpected to be the most suitable blend to be explored for polymer electrolytes application.
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Papers by Siti Rudhziah Binti Che Balian