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All Journal Jurnal Matematika & Sains The Journal of Pure and Applied Chemistry Research Journal of Mathematical and Fundamental Sciences Journal of Engineering and Technological Sciences World Chemical Engineering Journal Biology, Medicine, & Natural Product Chemistry EduChemia: Jurnal Kimia dan Pendidikan PENELITIAN DAN KARYA ILMIAH PROSIDING SEMINAR NASIONAL CENDEKIAWAN Indonesian Journal of Chemistry Prosiding Seminar Nasional Pakar CHEESA: Chemical Engineering Research Articles JURNAL PENELITIAN DAN KARYA ILMIAH LEMBAGA PENELITIAN UNIVERSITAS TRISAKTI Tedc Jurnal Penelitian dan Karya Ilmiah Lembaga Penelitian Universitas Trisakti Bulletin of Chemical Reaction Engineering & Catalysis al Kimiya : Jurnal Ilmu Kimia dan Terapan
Deana Wahyuningrum
Institut Teknologi Bandung
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Synthesis and Characterization of Molecularly Imprinted Polymers (MIPs) Using Humic Acid Tikarahayu Putri; Muhammad Ali Zulfikar; Deana Wahyuningrum; Iwan Syahjoko Saputra
The Journal of Pure and Applied Chemistry Research Vol 11, No 3 (2022): Edition September-December 2022
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2022.011.03.656

Abstract

MIPs was synthesized through microwave assisted organic synthesis (MAOS) method by using methyl methacrylate (MMA) as functional monomer, ethylene glycol dimethacrylate (EGDMA) as cross-linker, benzoyl peroxide (BPO) as initiator, N,N-dimethyl formamide (DMF) as porogen solvent, and (HA) as template. The MIPs was successfully synthesized according to the characterization using Fourier transform infrared (FTIR) spectroscopy, scanning electron microscope (SEM), electron dispersive spectrometer (EDS), and UV spectrophotometer. FTIR shows the other functional groups peaks in the FTIR spectra of NIPs and MIPs after leaching were appeared at the wavelength of 2955 cm-1 corresponded to stretching vibration of C-H of 1459 cm-1 and 1160.06 cm-1 corresponded to the vibration bands of CH3 and O-CH3. EDS shows the MIPs after leaching have the elemental compositions of C, O, and Si with a mass of 78.34, 21.43, and 0.23%. UV spectrum shows the MIPs and NIPs have absorbance values of 0.36 nm and 0.44 nm
The Microwave-assisted Synthesis of Polyethersulfone (PES) as A Matrix in Immobilization of Candida antarctica Lipase B (Cal-B) Khusna Widhyahrini; Nurrahmi Handayani; Deana Wahyuningrum; Santi Nurbaiti; Cynthia Linaya Radiman
Bulletin of Chemical Reaction Engineering & Catalysis 2017: BCREC Volume 12 Issue 3 Year 2017 (December 2017)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.12.3.774.343-350

Abstract

Candida antarctica lipase B (Cal-B) has been widely used in the hydrolysis reaction. However, it has some weaknesses, such as: forming of the heavy emulsion during the process, which is difficult to resolve and has no reusability. Therefore, it needs to be immobilized into a suitable matrix. One of the suitable supporting materials is polyethersulfone (PES) and its synthesis becames the objective of this paper. The PES was synthesized via a polycondensation reaction between hydroquinone and 4,4'-dichlorodiphenylsulfonein N-methylpyrrolidone (NMP) as solvent using Microwave Assisted Organic Synthesis (MAOS) method at170 °C for 66 minutes using an irradiation power of 300 watt. The synthesized PES was characterized by FTIR and 1H-NMR (500 MHz, DMSO-d6). Then the PES membrane was prepared from 20 % of the optimized mixtures of PES, PSf (polysulfone), and PEG (polyethylene glycol) dissolved in 80 % NMP.  The Cal-B was immobilized on the PES membrane by mixing it in a shaker at 30 °C and 100 rpm for 24 h using phosphate buffered saline (PBS). The identification of the immobilized Cal-B was done by using FTIR-ATR spectroscopy and SEM micrographs. The results of Lowry assay showed that the ‘Cal-B immobilized’ blended-membrane has a loading capacity of 91 mg/cm2 in a membrane surface area of 17.34 cm2. In this work, the activity of immobilized Cal-B was twice higher than the native enzyme in p-NP (p-Nitrophenolpalmitate) hydrolyzing. The results indicated that the synthesized PES showed a good performance when used as a matrix in the immobilization of Cal-B. 
Green Synthesis of [EMIm]Ac Ionic Liquid for Plasticizing MC-based Biopolymer Electrolyte Membranes Sun Theo Constan Lotebulo Ndruru; Deana Wahyuningrum; Bunbun Bundjali; I Made Arcana
Bulletin of Chemical Reaction Engineering & Catalysis 2019: BCREC Volume 14 Issue 2 Year 2019 (August 2019)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.14.2.3074.345-357

Abstract

Lithium-ion batteries (LIBs) are favorable power source devices at the last two decades, owing to high energy density, rechargeable, long life cycle, portable, safe, rechargeable, good performance and friendly environment. To support their development, in this research has been successfully prepared polymer electrolyte membrane, a main component of LIBs, based on 1-ethyl-3-methylimidazolium acetate ([EMIm]Ac) ionic liquid-plasticized methyl cellulose/lithium perchlorate (MC/LiClO4). [EMIm]Ac ionic  liquid was easy synthesized by metathesis reaction between 1-ethyl-3-methylimidazolium bromide ([EMIm]Br) ionic liquid and potassium acetate (CH3COOK) at ambient temperature, for 1 hour. [EMIm]Ac ionic liquid was functional groups analyzed with Fourier Transform Infra-red (FT-IR) and structural analyzed with 1H-Nuclear Magnetic Resonance (NMR) and 13C-NMR. [EMIm]Ac ionic liquid-plasticized MC/LiClO4 biopolymer electrolyte membrane was prepared by casting solution, with [EMIm]Ac ionic liquid content, 0, 5, 10, 15, 20, 25, and 30% (w/w). Effect of 15% (w/w) [EMIm]Ac ionic liquid incorporation to MC/LiClO4 showed the best condition and selected as the optimum condition with conductivity, tensile strength, elongation break, and thermal stability of 9.160×10-3 S.cm-1, 24.19 MPa, 36.43%, ~256 and ~370 ºC, respectively. These results confirm that [EMIm]Ac ionic liquid can plasticize biopolymer electrolyte membranes of MC/LiClO4 to be appealing performances to fulfill the LIB’s separator requirement. Copyright © 2019 BCREC Group. All rights reserved 
Sintesis Membran Komposit Berbahan Dasar Kitosan dengan Metoda Sol-Gel sebagai Membran Fuel Cell Pada Suhu Tinggi Nila Tanyela Berghuis; Muhammad Ali Zulfikar; Deana Wahyuningrum
al Kimiya: Jurnal Ilmu Kimia dan Terapan Vol 7, No 1 (2020): al Kimiya: Jurnal Ilmu Kimia dan Terapan
Publisher : Department of Chemistry, Faculty of Science and Technology, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/ak.v7i1.6614

Abstract

Kitosan adalah polisakarida kationik yang terdiri dari residu glukosamin dan N-asetil glukosamin yang terikat oleh ikatan β-1,4 glikosidik. Keberadaan gugus alkohol bebas pada kerangka kitosan dapat dimanfaatkan sebagai gugus pembentuk matrik dengan atom lainnya, dalam penelitian ini adalah silika (Si). Kondisi ini dapat dimanfaatkan sebagai bahan dasar sintesis membran sel bahan bakar (Fuel Cell). Sintesis kitosan dilakukan dengan mendeasetilasi kitin yang bersumber dari limbah kulit udang. Membran komposit kitosan-TEOS (Tetraetilortosilikat) telah berhasil disintesis dengan menggunakan variasi nilai konsentrasi kitosan terhadap jumlah TEOS. Membran komposit kitosan-TEOS disintesis dengan menggunakan metoda sol-gel dan pembalikan fasa. Kitosan dan membran komposit yang dihasilkan kemudian dikarakterisasi sifat kimia dan fisika nya yaitu penentuan derajat deasetilasi, penentuan berat molekul rata-rata (Mv), persen kelarutan, analisis struktur dengan menggunakan FTIR, uji ketahanan suhu, analisis morfologi dengan menggunakan SEM, dan kapasitas pertukaran ion (KPI). Hasil karakterisasi menunjukkan derajat deasetilasi kitosan sebesar 79,31% dengan nilai berat molekul rata-rata (Mv) 1,16 x 107 g/mol dan persen kelarutan 1% (v/v) asam asetat. Hasil pengukuran FTIR membran menunjukkan terdapat puncak 1377 cm-1 yang merupakan puncak dari eter siklik, puncak 3454 cm-1 yang merupakan puncak dari O-H, puncak pada 1662-1666 cm-1 yang merupakan puncak dari C=O asetamida, dan 3454-3500 cm-1 yang merupakan puncak N-H, sedangkan puncak 904 cm-1 dan 1091,7 cm-1 menunjukkan adanya ikatan silang antara Si-OH dan Si-O-C (alifatik). Uji ketahanan membran terhadap suhu sebesar 120oC sedangkan nilai konduktivitas ionik terbesar dimiliki oleh tipe membran CTSN-1,5 dengan nilai 0,114 meq/g. Hasil analisis SEM menunjukkan bahwa membran mempunyai struktur yang rapat.
Lessons Learned in Interfacial Tension Prediction Using a Mixture of Sulfonate- and Ethoxylate-based Surfactants in a Waxy Oil-brine System Rani Kurnia; Dian Asfriany Nurfalah; Deana Wahyuningrum; Taufan Marhaendrajana; Utjok W.R Siagian
Journal of Engineering and Technological Sciences Vol. 55 No. 6 (2023)
Publisher : Directorate for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2023.55.6.1

Abstract

The chemical-enhanced oil recovery (CEOR) method is applied to change reservoir rock or fluid characteristics by injecting alkaline, surfactant, and polymer or a combination of two or three of the compounds. Surfactant flooding improves oil recovery by reducing the interfacial tension between oil and water. Selecting reservoir surfactants, especially microemulsions, requires careful screening. This study predicted waxy oil system interfacial tension using surfactant mixtures at below- and above-optimum salinity. To predict the interfacial tension, microemulsion types, HLB, ideal salinity, and HLD were used. The study predicted oil-surfactant-water interfacial tension using SAE, FEO, and their mixtures. We improved the Huh equation by adding a fitting parameter, β, to accommodate the transition from type III to type II microemulsions as salinity increases. With increasing salinity, anionic surfactant’s hydrophilic-hydrophobic interactions change, affecting the  values and surfactant layer thickness. This study improved hydrophilic-lipophilic deviation (HLDN) by establishing a fixed interval for nonionic surfactants. Van der Waals attraction,  values and interface surfactant layer thickness are connected, reflecting the fact that lower  values reduce interfacial tension better. This study also found that surfactant packing at the oil-water interface increases the order of the oil-solution ratio and the microemulsion values with polarity.
POTENSI KEBERHASILAN KULIT UDANG SEBAGAI BAHAN DASAR POLIMER KITOSAN: STUDI LITERATUR Setiati, Rini; Siregar, Septoratno; Wahyuningrum, Deana; Fathaddin, M. Taufik
JURNAL PENELITIAN DAN KARYA ILMIAH LEMBAGA PENELITIAN UNIVERSITAS TRISAKTI Volume 6, Nomor 1, Januari 2021
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/pdk.v6i1.8637

Abstract

Tujuan dari penelitian ini adalah untuk mempelajari potensi yang dimiliki oleh kulit udang sebagai bahan baku polimer kitosan.  Penelitian ini diawali dengan proses pemisalahan kulit udang kitin dan proses kitin menjadi kitosan serta menguji karakteristiknya. Kulit udang dapat diolah menjadi kitosan karena kandungan kitin yang terdapat di dalamnya.  Kitin merupakan bahan organik utama terdapat pada kelompok hewan crustacea, insekta, fungi, mollusca dan arthropoda. Cangkang kepiting, udang dan lobster juga merupakan sumber bahan dasar produksi kitin karena kandungan kitinnya cukup tinggi. Kitin merupakan biopolimer alam paling melimpah kedua setelah selulosa yang tidak beracun dan diproduksi dari limbah kulit udang. Kitosan diolah dari kulit udang melalui proses deproteinasi, demineralisasi dan deasetilasi. Reagen yang digunakan adalah NaOH dan KOH. Kemudian kitosan diuji sifat fisiknya melalui uji kadar air, kadar abu, kadar nitrogen, viskositas, derajat deasetilasi, analisis gugus fungsi dengan spektroskopi IR dan kristalinitas dengan difraksi sinar X. Sifat fisik kitosan dilihat dari bentuk fisik, analisis gugus fungsi dan kristalinitas. Potensi penerapan kitosan, sebagai turunan kitin yang terdeasetilasi, bersifat multidimensi, seperti dalam makanan dan gizi, bioteknologi, ilmu material, obat-obatan dan farmasi, pertanian dan perlindungan lingkungan. Isolasi kitin dari kulit udang dan sintesanya menjadi kitosan, menjadikan kulit udang lebih barmanfaat untuk bidang-bidang lain. Kulit udang yang diolah menjadi kitosan polimer dapat berpotensi untuk digunakan dalam bidang Enhanced Oil Recovery sebagai fluida injeksi kimiawi dalam upaya menaikkan produksi minyak.
The Development of Green Chemistry Teaching Material Based on Organic Compound Synthesis Pertiwi, Annisa Mustika; Wahyuningrum, Deana
EduChemia: Jurnal Kimia dan Pendidikan Vol 9, No 2 (2024)
Publisher : Department of Chemistr Education Faculty of Teacher Training and Education Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/educhemia.v9i1.24452

Abstract

Green chemistry is currently included in 10th-grade chemistry in Indonesia’s Merdeka curriculum. However, the learning implementation is still limited to the knowledge of approximately 12 principles of green chemistry, but its relevance to real-world applications is less discussed. The process of organic compound synthesis is a problem that is closely related to the application of green chemistry. This research aims to produce context-based green chemistry teaching materials for senior high school students on the basis of experiments using an ionic liquid and microwave-assisted organic synthesis (MAOS) method in the synthesis of an organic compound named dehydrozingerone (DHZ) from vanillin and acetone. The instructional material development method follows the Research & Development (RnD) method via a 4D model and includes the Define, Design, Develop, and Deliver stages. The guided-inquiry student worksheets developed in this research were tested in a classroom setting with 31 10th grade students from Al Ma’soem Senior High School in Bandung, West Java, Indonesia. The evaluation of the teaching materials received a positive response from the students, with a score of 78.29%, indicating a “good” classification. The findings of this study highlight the potential of these contextual teaching materials to enhance students’ engagement and understanding in learning green chemistry concepts and applications.
Green Synthesis of Dehydrozingerone (DHZ) Utilizing Ionic Liquid Medium and Microwave Irradiation Pertiwi, Annisa Mustika; Wahyuningrum, Deana
EduChemia: Jurnal Kimia dan Pendidikan Vol 9, No 1 (2024)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/educhemia.v9i1.24414

Abstract

Dehydrozingerone (DHZ), 4-(4-hydroxy-3-methoxyphenyl)-3-buten-2-one, a natural compound found in the rhizome of ginger plants (Zingiber officinale), exhibits a wide range of bioactivities, including antioxidant, anticancer, antimalarial, antidepressant, antifungal, and many other bioactivities. Conventionally, DHZ is synthesized through a cross-aldol Claisen-Schmidt condensation of vanillin and acetone, but this process often requires extended reaction times (up to 48 hours), results in low yields, and involves the excess use of organic solvents for purification. To address these limitations, this study aims to develop a green synthesis method for DHZ utilizing a 1-decyl-3-methylimidazolium bromide ([DMIM]Br) ionic liquid medium and microwave-assisted organic synthesis (MAOS) method. The experimental procedure involved optimizing the reaction conditions and varying the concentration of [DMIM]Br under microwave irradiation. Product characterization was performed by melting point determination, thin-layer chromatography (TLC), Fourier transform infrared (FTIR), and nuclear magnetic resonance (NMR) 1H (500 MHz, CDCl3) and 13C (125 MHz, CDCl3) spectroscopy. These findings indicate that the use of the [DMIM]Br ionic liquid significantly improved the purity and yield of DHZ products. The optimal conditions were synthesis from vanillin and acetone in a 1:10 molar ratio, 2.5 M NaOH, and 5% [DMIM]Br (w/v) using MAOS for 120 minutes (50°C, 300 W) to produce a 62.96% yield product in the form of a bright yellow solid with a melting point range of 129–130°C. The use of ionic liquids and MAOS provides a more efficient and environmentally friendly method for synthesizing DHZ, offering a significant reduction in reaction time and eliminating excess organic solvents, thus making it a promising alternative to traditional synthesis methods.
The Synthesis of Glutaraldehyde-modified Chitosan Utilizing MAOS (Microwave Assisted Organic Synthesis) Method as Adsorbent of Pb(II) Ions Contained in Water Sample of Cikapundung River - Bandung Herayati, Herayati; Wahyuningrum, Deana
World Chemical Engineering Journal VOLUME 4 NO. 1 JUNE 2020
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/wcej.v4i1.10591

Abstract

Indonesia has a vast territory. Approximately 2/3 of Indonesia is water. Indonesia has almost 6% of the world's water resources or approximately 21% of water resources in the Asia Pacific region. Indonesian waters comprise 97.4% seas and 2.6% are rivers, lakes and straits. There are 309 rivers in Indonesia and 49 of them flow through Bandung; one of them is Cikapundung River. Pb(II) ions contained in Cikapundung River has exceeded the quality standard of water river. Therefore, it is necessary to reduce the amount of Pb(II) ions from the river. One of the solutions is by using biodegradable adsorbent, the glutaraldehyde-modified chitosan. Chitosan was obtained from deacetylation of chitin in basic condition. The chitosan was characterized using FTIR showed 85.5% degrees of deacetylation. The other characterization is determination of average molecular mass using Ostwald viscometry method, obtained the average molecular mass of chitosan is 2.7 x 106 g/mol. Furthermore, chitosan was modified by reacting with glutaraldehyde using MAOS (Microwave Assisted Organic Synthesis) method at 80℃ with irradiation power of 100 W for 60 minutes to form glutaraldehyde-modified chitosan with 79% degree of substitution. The synthesized glutaraldehyde-modified chitosan was characterized by FTIR, SEM, SAA and applied as adsorbent of Pb(II) ions. The results showed that the optimum condition of adsorption for 15 mL of Pb(II) solution was achieved at pH 4 using 0.075 grams of adsorbent and 90 minutes of contact time. The adsorption process of Pb(II) ions follows the Langmuir isotherm model and the pseudo-second order kinetics with percent adsorption of Pb(II) ions from the water sample of Cikapundung river is 84% and 50.2%, for sample collected from middle-stream and downstream of river, respectively.
Produksi dan Optimasi Biosurfaktan dari Bakteri Halofilik Chromohalobacter japonicus BK-AB18 Yuliana, Cut; Hertadi, Rukman; Wahyuningrum, Deana
CHEESA: Chemical Engineering Research Articles Vol. 2 No. 2 (2019)
Publisher : Universitas PGRI Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/cheesa.v2i2.5410

Abstract

Perkembangan teknologi bioproses telah mendorong pendekatan ke arah produk surfaktan biologi (biosurfaktan) yang ramah lingkungan. Penelitian ini difokuskan pada optimasi produksi biosurfaktan dengan menggunakan variasi sumber karbon dan nitrogen. Tahap awal penelitian ini dilakukan dengan menguji potensi bakteri Chromohalobacter japonicus BK-AB18 penghasil biosurfaktan dengan menggunakan metode uji hemolisis dimana hasil menunjukkan aktivitas hemolisis yang tinggi dengan ukuran zona bening 3 cm pada media agar darah. Selanjutnya dilakukan produksi pada medium optimal dengan menambahkan 2% variasi sumber karbon terdiri dari minyak zaitun, minyak jagung, minyak kelapa sawit, minyak kacang kedelai dan minyak bunga matahari serta 0,3 % variasi nitrogen terdiri dari urea, NaNO3, NH4Cl, NH2(SO)4 and KNO3. Hasil penelitian menunjukkan produksi biosurfaktan dari Chromohalobacter japonicus BK-AB18 meningkat secara signifikan dengan menggunakan minyak zaitun sebagai sumber karbon dan urea sebagai sumber nitrogen dengan hasil penyebaran minyak 4,8 cm serta aktivitas biosurfaktan dengan nilai tegangan permukaan sebesar 34 dyne/cm, dan hasil uji emulsifikasi sebesar 76%.
Co-Authors Bambang Ariwahjoedi Buchari Buchari Bunbun Bundjali Bunbun Bundjali Bunbun Bundjali Bunbun Bundjali Bunbun Bundjali Cynthia Linaya Radiman Cynthia Linaya Radiman Damar Nurwahyu Bima Dian Asfriany Nurfalah Doddy Abdassah Herayati Herayati Herayati, Herayati I Made ARCANA I Made Arcana I Made Arcana I Putu Parwata Indah Puspita Sari Irma Mulyani Irma Mulyani Irma Nuril Maryam Iwan Syahjoko Saputra Khusna Widhyahrini Lucy Arianie M. Taufik Fathaddin M. Taufik Fathaddin, M. Taufik Muhamad Jalil Baari Muhammad Ali Zulfikar Ndruru, Sun Theo Constan Lotebulo Ni Ketut Ketis Nila Tanyela Berghuis Nora Idiawati Novriana Sumarti Nuning Nuraini Nurrahmi Handayani Pertiwi, Annisa Mustika Rani Kurnia Rani Kurnia Rini Setiati RUKMAN HERTADI Sadijah Achmad Sadijah Achmad Santi Nurbaiti Septoratno Siregar Septoratno Siregar Septoratno Siregar Sony Suhandono Sugiatmo Kasmungin Sun Theo Constan Lotebulo Ndruru Sun Theo Constan Lotebulo Ndruru Taufan Marhaendrajana Taufan Marhaendrajana, Taufan Tikarahayu Putri Utin Dewi Pebriyana Utjok W.R Siagian Yana Maolana Syah Yudiansyah Yudiansyah Yuliana, Cut Yulyani Nur Azizah