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All Journal Alchemy Jurnal Penelitian Kimia Indonesian Journal of Chemical Science ALCHEMY Jurnal Penelitian Kimia Communications in Science and Technology Molekul: Jurnal Ilmiah Kimia
Candra Purnawan
Department of Chemistry, University of Sebelas Maret, Jl. Ir. Sutami No. 36 A, Surakarta 57126
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Engineering 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.
THE EFFECT OF CHLORO ACETIC ACID CONCENTRATION AND TEMPERATURE REACTION OF CARBOXYMETHYL CHITOSAN FORMATION ON CATION EXCHANGE CAPACITY AND THERMAL STABILITY Purnawan, Candra; Pramono, Edi; Purwanto, Purwanto; Martini, Tri; Haryati, Thita
Alchemy Jurnal Penelitian Kimia Vol 10, No 1 (2014)
Publisher : Alchemy Jurnal Penelitian Kimia

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Abstract

The research on the effect of chloro acetic concentration and temperature reaction of carboxymethyl chitosan formation on cation exchange capacity and thermal stability of polymer have been done. Carboxymethyl chitosan was synthesized by reaction of chitosan and chloro acetic acid with NaOH as catalyst. Polymer was characterized by Fourier Transform Infrared Spectrofotometer, cation exchange capacity test, and thermal analysis with thermogravimetric method. Carboxymethyl chitosan has strong FTIR adsorption of carboxyl group (-COO-) in 1606,70 cm-1 and 1444,68 cm-1. The increasing of chloro acetic acid concentration and reaction temperature decreased cation exchage capacity and changed thermal stability of polymer.
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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Abstract

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.
SINTESIS KITOSAN-ARGININ DENGAN KATALIS PIRIDIN DAN UJI AKTIVITAS ANTIBAKTERI TERHADAP Escherichia coli Purnawan, Candra; Purwanto, Purwanto; Martini, Tri; Kusumaningtyas, Triana; Ambarrukmi, Asnani Ratna
Indonesian Journal of Chemical Science Vol 3 No 2 (2014)
Publisher : Indonesian Journal of Chemical Science

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Abstract

Telah dilakukan penelitian tentang sintesis kitosan-arginin dengan katalis piridin dan uji aktivitas antibakteri terhadap Escherichia coli. Tujuan penelitian ini adalah mempelajari pengaruh penambahan massa arginin pada kitosan dan variasi suhu reaksi dalam sintesis kitosan-arginin terhadap aktivitas antibakteri Escherichia coli serta membandingkan kitosan dan kitosan-arginin terhadap aktivitas antibakteri Escherichia coli. Sintesis kitosan-arginin dilakukan dengan perbandingan massa (b/b) kitosan:arginin 1:0,5; 1:1; 1:1,25; 1:1,5; 1:2 dan variasi suhu reaksi 60 °C, 80 °C, 100 °C menggunakan katalis piridin untuk mengaktifkan gugus karbonil arginin. Karakterisasi kitosan-arginin meliputi Spektroskopi Sinar Merah (FT-IR), Analisis Termal (TGA-DTA) dan % Nitrogen dengan metode Kjeldahl. Uji aktivitas antibakteri menggunakan metode Optical Density (OD) λmaks 600 nm pada jam ke-0, 3, 6, 9, 12, 24 dan 48. Hasil penelitian menunjukkan bahwa penambahan massa arginin dan variasi suhu reaksi sintesis kitosan-arginin tidak menunjukkan perbedaan signifikan terhadap daya hambat bakteri. Namun ketika aktivitas antibakteri kitosan jam ke-48 menurun, aktivitas antibakteri kitosan:arginin 1:1,5 pada 80 ᵒC masih meningkat.
The Effect of Chloro Acetic Acid Concentration and Temperature Reaction of Carboxymethyl Chitosan Formation on Cation Exchange Capacity and Thermal Stability Purnawan, Candra; Pramono, Edi; Purwanto, Purwanto
ALCHEMY Jurnal Penelitian Kimia Vol 10, No 1 (2014): March
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.10.1.7.31-39

Abstract

The research on the effect of chloro acetic concentration and temperature reaction of carboxymethyl chitosan formation on cation exchange capacity and thermal stability of polymer have been done. Carboxymethyl chitosan was synthesized by reaction of chitosan and chloro acetic acid with NaOH as catalyst. Polymer was characterized by Fourier Transform Infrared Spectrofotometer, cation exchange capacity test, and thermal analysis with thermogravimetric method. Carboxymethyl chitosan has strong FTIR adsorption of carboxyl group (-COO-) in 1606,70 cm-1 and 1444,68 cm-1. The increasing of chloro acetic acid concentration and reaction temperature decreased cation exchage capacity and changed thermal stability of polymer.
Silylated-montmorillonite as co-adsorbent of chitosan composites for methylene blue dye removal in aqueous solution Saputra, Ozi Adi; Kurnia; Pujiasih, Septi; Rizki, Vanani Nur; Nurhayati, Betty; Pramono, Edi; Purnawan, Candra
Communications in Science and Technology Vol 5 No 1 (2020)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1045.12 KB) | DOI: 10.21924/cst.5.1.2020.182

Abstract

Industrialization plays important role in the economy of developing countries, including increasing community welfare. However, the presence of poorly industries waste disposal system has negative impact to the environment. Therefore, it is necessary to overcome this problem with low-cost technology, called adsorption. In this research, silylated-montmorillonite (sMMt) has been successfully prepared as supporting material for adsorption of methylene blue by chitosan. The sMMt was characterized by FTIR, XRD, and elemental mapping techniques. The chitosan/sMMt composites were prepared through dissolution-precipitation method and produced rod-like morphology as observed by SEM. The adsorption process was carried out in a batch method by studying the pH and the adsorption contact time. The adsorption kinetic mechanism of the chitosan/sMMt nanocomposite followed pseudo-second order rather than Lagergren model indicating chemisorption predominant. The addition of silylated-montmorillonite into chitosan enhanced the methylene blue dye removal performance, which evidenced by improving Qe values by 10% compared to chitosan.
Rice Husk Ash-Derived Magnetized Silica Functionalized with TMPDT for Heavy Metal Ion Removal Hastuti, Sri; Irfani, Hasna Haifa; Nuzula, Rifania Aura; Saraswati, Teguh Endah; Masykur, Abu; Purnawan, Candra; Wibowo, Atmanto Heru; Fitriana, Dina
Molekul Vol 21 No 1 (2026)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jm.2026.21.1.17837

Abstract

ABSTRACT. The removal of toxic heavy metal ions from water remains a critical environmental challenge. In this study, a novel magnetized mesoporous silica adsorbent functionalized with N1-(3-trimethoxysilylpropyl) diethylenetriamine (Fe₃O₄@SiO₂@meso-SiO2@TMPDT), synthesized from rice husk ash, was developed for the adsorption of Cd(II) and Pb(II) ions. The characterization of the adsorbent by FTIR, SEM-EDX, and TGA confirmed the successful synthesis of magnetized and TMPDT-functionalized silica derived from rice husk ash (Fe₃O₄@SiO₂@meso-SiO₂@TMPDT). The adsorption study consists of the determination of optimum pH, the adsorption kinetics study, and the adsorption isotherm. Batch adsorption studies showed that the optimal pH values for Cd(II) and Pb(II) adsorption were 4 and 3, respectively. The adsorption kinetics for both metal ions followed a pseudo-second-order model. Furthermore, the adsorption isotherms fitted both the Langmuir and the Freundlich models with comparable R² values. The maximum adsorption capacities (Qₘ) of Fe₃O₄@SiO₂@meso-SiO₂@TMPDT for Cd(II) and Pb(II) were 28.089 and 24.498 mg/g, respectively. These findings demonstrate that the developed adsorbents offer an effective and sustainable approach for heavy metal removal from aqueous systems. Keywords: adsorption, heavy metal ions, magnetized silica, rice husk ash, TMPDT
Co-Authors Abu Masykur Asnani Ratna Ambarrukmi, Asnani Ratna Atmanto Heru Wibowo Edi Pramono Edi Pramono Eko Sugiharto Fitriana, Dina Indriana Kartini Irfani, Hasna Haifa Jati Wulansari, Jati Kurnia Nurhayati, Betty Nurul Hidayat Apriliata Nuzula, Rifania Aura Ozi Adi Saputra, Ozi Adi Pandu Satrio Asiska Prabowo, Pandu Satrio Pujiasih, Septi Purwanto Purwanto Rizki, Vanani Nur Sayekti Wahyuningsih Shofiatul Afidah, Shofiatul Sotya Rawiningtyas, Sotya Sri Hastuti Teguh Endah Saraswati Thita Haryati, Thita Tri Martini Triana Kusumaningtyas, Triana Yuniawan Hidayat Zidny Z.S.R.A. Zidny, Zidny Z.S.R.A.