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All Journal Alchemy Jurnal Penelitian Kimia
Jati Wulansari, Jati
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Chemical Engineering, Chemistry & Bioengineering Energy Environmental Science Materials Science & Nanotechnology

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PREPARATION AND CHARACTERIZATION OF CHITOSAN VANILINE AS ELECTROLYTE POLYMER MEMBRANE Pramono, Edi; Asiska Prabowo, Pandu Satrio; Purnawan, Candra; Wulansari, Jati
Alchemy Jurnal Penelitian Kimia Vol 8, No 1 (2012)
Publisher : Alchemy Jurnal Penelitian Kimia

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Abstract

The research of chitosan modification with vanilin and its characterization as polymer electrolyte membranes was carried out. Chitosan-based shciff base compounds was synthesized  from chitosan and vanilin with pyperidine as catalyst. The polymers were characterized by Fourier Transform Infrared (FTIR) and its cationic exchange capacity, while membranes were characterized by cationic exchange capacity, swelling degree and its thermal stability. The existence of imine vibration peak provides that the chitosan vaniline was succesfully synthesized. The addition of vanillin increases the cationic exchange capasity of membrane, however it decreases the swelling degree. Thermal data indicate the polymer membrane degraded above 250oC with three step degradation. Based on the cationic exchange capacity and its thermal stability, the membrane has a good potential for application in polymer electrolyte membrane fuel cells, but modifications are still needed to reduce the swelling degree of membrane.
COMPOSITE OF CHITOSAN VANILIN / SULFONATED POLYSTYRENE AS POLYMER ELECTROLYTE MEMBRANES : CATIONIC EXCHANGE CAPACITY, SWELLING DEGREE AND THERMAL PROPERTIES Pramono, Edi; Purnawan, Candra; Hidayat, Yuniawan; Wulansari, Jati; Wahyuningsih, Sayekti
Alchemy Jurnal Penelitian Kimia Vol 10, No 2 (2014)
Publisher : Alchemy Jurnal Penelitian Kimia

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Research on the preparation and characterization of sulfonated polystyrene (PST) /chitosan vanillin (KV) composite as electrolyte membranes has been conducted in order to investigate the effect of PST and KV composition  to its chemical and physical properties. Polystyrene was modified by sulfonation reaction to produces PST, meanwhile chitosan was modified by schift base reaction to produces KV. The composite membranes were prepared by casting method and were characterized in order to identify the functional groups contained in the composite, the cation exchange capacity (CEC), the Swelling Degree (SD), the thermal properties and the morphology. The peak of imine vibration in the FTIR spectrum indicates that the chitosan vanilin was succesfully synthesized. Meanwhile, the peak of sulfonate vibration indicates the product of sulfonation on polystyrene. The result of CEC analysis shows that the addition of sulfonate groups on polystyrene and the addition of phenolic groups on chitosan increase the CEC value. The increasing of PST and KV concentration in membrane enhance the CEC value. However, the increasing of PST concentration in membrane composition even decrease the Swelling Degree of membranes. Meanwhile, the increasing of KV concentration increase the swelling degree of membranes. Thermal analysis shows that the thermal decomposition of membranes occurs in three stages i.e. the dehydration of water molecules, the degradation of the subtituen groups and the plasticizer and the degradation of the back bone of chitosan and polystyrene.
Co-Authors Candra Purnawan Edi Pramono Pandu Satrio Asiska Prabowo, Pandu Satrio Sayekti Wahyuningsih Yuniawan Hidayat