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All Journal Jurnal Matematika & Sains Bulletin of Chemical Reaction Engineering & Catalysis The Journal of Pure and Applied Chemistry Research Journal of Mathematical and Fundamental Sciences Journal of Engineering and Technological Sciences World Chemical Engineering Journal 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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Asymmetric Addition Reaction of Reformatsky Type Reagent to Nitrones: An Intermediate for Synthesis of Physiologically Active Substances Deana Wahyuningrum
Jurnal Matematika & Sains Vol 9, No 4 (2004)
Publisher : Institut Teknologi Bandung

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Abstract

Asymmetric addition reaction of Reformatsky type reagent, which was generated in situ from diethylzinc and iodoacetic ester, to carbon-nitrogen double bond in nitrones utilizing (R,R)-DIPT as a chiral auxiliary agent showed fairly moderate to high enantioselective products in fairly high chemical yields. Nitrones were known as one of potentially intermediate nitrogen-containing compounds for synthesizing/physiologically active substances, such as pharmaceutical and agrochemical substances. The best results of this type of reaction were achieved from the asymmetric addition to nitrone, 6,7-dimethoxy-3,4-dihydroisoquinoline N-oxide (73% ee) and N-phenyl-α-(dibenzylcarbamoyl)methanimine N-oxide (21% ee) with fairly high chemical yields. The use of additive in asymmetric addition reaction to 6,7-dimethoxy-3,4-dihydroisoquinoline N-oxide was found to be crucial in improving the enantioselectivity of reaction, since the best results mentioned were achieved in the presence of isoquinoline-N-oxide or pyridine-N-oxide (0.5 molar equivalent) as additive. The difference in stereo-structure between 6,7-dimethoxy-3,4-dihydroisoquinoline N-oxide and N-phenyl-α-(dibenzylcarbamoyl)methanimine N-oxide caused the effect of (R,R)-DIPT as chiral auxiliary agent, additives and slow charge addition method towards the course of reaction resulting different products with different enantioselectivity.
Efektivitas Asam Glutamat Sebagai Inhibitor Korosi pada Baja Karbon dalam Larutan NaCl 1% Ni Ketut Ketis; Deana Wahyuningrum; Sadijah Achmad; Bunbun Bundjali
Jurnal Matematika & Sains Vol 15, No 1 (2010)
Publisher : Institut Teknologi Bandung

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Abstract

Corrosion towards the inner parts of oilfield pipelines is one of most disturbing problems in oil and gas industries.  Amino acid and its derivatives have potent as corrosion inhibitor, including glutamic acid, which has been studied within this research project.  The effectivity of glutamic acid as corrosion inhibitor towards carbon steel in 1% (w/v) NaCl solution saturated by CO2 has been determined utilizing Tafel method with the optimization of glutamic acid concentration, pH, and temperature of tested medium.  Glutamic acid showed the highest corrosion inhibition efficiency at room temperature (26oC), which is 48.19% at the concentration of 8 ppm in 1% NaCl solution and pH 6.5.  The presence of acetate buffer solution in the medium that was being tested and at the temperature higher than room temperature has caused glutamic acid at the concentration of 8 ppm became ineffective to be applied as corrosion inhibitor.
Model Matematika Pada Mekanisme Laju Korosi Logam Baja Karbon dengan Penambahan Inhibitor Nuning Nuraini; Novriana Sumarti; Deana Wahyuningrum
Jurnal Matematika & Sains Vol 17, No 1 (2012)
Publisher : Institut Teknologi Bandung

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Abstract

Korosi pada logam, yang disebabkan reaksi dengan lingkungannya, merupakan proses pelarutan logam membentuk senyawanya dalam lingkungan korosif seperti adanya air, gas oksigen dan karbondioksida.  Korosi tidak dapat dihilangkan, namun dapat dikendalikan atau dicegah. Salah satu cara untuk mengatasi korosi, terutama yang terjadi pada permukaan bagian dalam suatu pipa logam, adalah dengan penambahan suatu inhibitor korosi.  Dengan melihat proses terjadinya korosi dari sudut pandang berkurangnya logam persatuan waktu, diturunkanlah suatu model matematika yang memperlihatkan pengaruh senyawa inhibitor korosi terhadap logam, khususnya baja karbon dalam larutan NaCl 1%.  Model yang diperoleh, yang merupakan pengembangan dari model sebelumnya, menggambarkan penambahan senyawa inhibitor dengan 2 cara, yaitu pada saat awal saja dan cara penambahan secara kontinu. Hasil yang didapat menunjukkan beberapa nilai konsentrasi dari inhibitor memberikan pengaruh pada mekanisme laju korosi secara efisien untuk menghentikan proses korosi. Kata kunci: Baja karbon, Inhibitor korosi, Laju korosi, Model matematika.   Mathematical Model on Corrosion Rate Mechanism of Carbon Steel by Inhibitor Addition Abstract Corrosion is the deterioration of a material due to interaction with its environment. It is the dissolution process of metal in which metallic atoms are oxidized to form its compounds in the presence of water and gases, such as oxygen and carbon dioxide. Even though this corrosion cannot be eliminated, it can be controlled or prevented.  One way to control corrosion, especially corrosion that occurred at the inner parts of metallic pipelines, is by addition of corrosion inhibitor. If the corrosion process was assumed as the rate of decaying process of metal per times unit, then the mathematic model can be derived to describe the effect of addition of inhibitor towards corrosion rate of metal, especially carbon steel in 1% NaCl solution. The result show that several values of inhibitor concentration provide the efficient effect on the corrosion rate mechanism to stop the corrosion process. Keywords: Carbon steel, Corrosion inhibitor, Corrosion rate, Mathematical model.
PREPARATION AND CHARACTERIZATION OF BIOPOLYMER ELECTROLYTE MEMBRANES BASED ON LICLO4-COMPLEXED METHYL CELLULOSE AS LITHIUM-ION BATTERY SEPARATOR Ndruru, Sun Theo Constan Lotebulo; Wahyuningrum, Deana; Bundjali, Bunbun; Arcana, I Made
Journal of Engineering and Technological Sciences Vol 52, No 1 (2020)
Publisher : ITB Journal Publisher, LPPM ITB

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Abstract

The polymer electrolyte membrane is a main component of lithium-ion batteries (LiBs), serving as separator and electrolyte. In this work, we prepared biopolymer electrolyte (BPE) membranes of lithium perchlorate (LiClO4)-complexed methyl cellulose (MC). Methyl cellulose (MC), a cellulose derivative, has attractive properties for use as biopolymer electrolyte. The bulkier anion size of lithium salt (LiClO4) significantly enhances the performance of biopolymer electrolyte (BPE) membranes. The fabricated biopolymer electrolyte (BPE) membranes were characterized by FTIR, EIS, tensile tester, XRD and TGA. Biopolymer electrolyte membranes with various weight percentages of LiClO4 salt (0%, 5%, 10%, 15%, and 20%) were prepared using a simple solution casting technique. Incorporation of 10% weight of LiClO4 into the MC-based host polymer was selected as optimum condition, because this yielded good conductivity (3.66 x 10-5 S cm-1), good mechanical properties (tensile strength 35.97 MPa and elongation at break 14.47%), good thermal stability (208.4 to 338.2 °C) as well as ease of preparation and low cost of production. Based on its characteristics it can be stated that the 10% LiClO4-complexed MC membrane meets the requirements as a candidate separator for lithium-ion battery application.
Preparation and Characterization of Biopolymer Electrolyte Membranes Based on LiClO4-Complexed Methyl Cellulose as Lithium-ion Battery Separator Sun Theo Constan Lotebulo Ndruru; Deana Wahyuningrum; Bunbun Bundjali; I Made Arcana
Journal of Engineering and Technological Sciences Vol. 52 No. 1 (2020)
Publisher : Institute 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.2020.52.1.3

Abstract

The polymer electrolyte membrane is a main component of lithium-ion batteries (LiBs), serving as separator and electrolyte. In this work, we prepared biopolymer electrolyte (BPE) membranes of lithium perchlorate (LiClO4)-complexed methyl cellulose (MC). Methyl cellulose (MC), a cellulose derivative, has attractive properties for use as biopolymer electrolyte. The bulkier anion size of lithium salt (LiClO4) significantly enhances the performance of biopolymer electrolyte (BPE) membranes. The fabricated biopolymer electrolyte (BPE) membranes were characterized by FTIR, EIS, tensile tester, XRD and TGA. Biopolymer electrolyte membranes with various weight percentages of LiClO4 salt (0%, 5%, 10%, 15%, and 20%) were prepared using a simple solution casting technique. Incorporation of 10% weight of LiClO4 into the MC-based host polymer was selected as optimum condition, because this yielded good conductivity (3.66 x 10-5 S cm-1), good mechanical properties (tensile strength 35.97 MPa and elongation at break 14.47%), good thermal stability (208.4 to 338.2 °C) as well as ease of preparation and low cost of production. Based on its characteristics it can be stated that the 10% LiClO4-complexed MC membrane meets the requirements as a candidate separator for lithium-ion battery application.
Correlation between Phase Behavior and Interfacial Tension for Mixtures of Amphoteric and Nonionic Surfactant with Waxy Oil Rani Kurnia; Deana Wahyuningrum; Doddy Abdassah; Taufan Marhaendrajana
Journal of Engineering and Technological Sciences Vol. 53 No. 5 (2021)
Publisher : Institute 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.2021.53.5.1

Abstract

Phase behavior tests in the surfactant screening process for EOR applications remain one of the relatively convenient ways to design an optimum surfactant formulation. However, phase behavior studies are unable to provide quantitative data for interfacial tension, which is one of the parameters that must be considered when selecting surfactants for EOR. Several studies related to the prediction of interfacial tension through phase behavior testing have been carried out. In this paper, the Huh correlation was used to estimate the interfacial tension value based on phase behavior tests. It was found that the current form of the Huh correlation may be applied for the below-to-optimum salinity condition. Furthermore, the constants of the equation vary depending on the surfactant type and mixtures.  
Hasil Studi Laboratorium Penentuan Karakteristik Alamiah Surfaktan Natrium Lignosulfonat Dari Ampas Tebu Sebagai Fluida Injeksi Di Reservoir Minyak Rini Setiati; Septoratno Siregar; Taufan Marhaendrajana; Deana Wahyuningrum
JURNAL PENELITIAN DAN KARYA ILMIAH LEMBAGA PENELITIAN UNIVERSITAS TRISAKTI Vol. 3 No. 1 (2018)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (169.039 KB) | DOI: 10.25105/pdk.v3i1.2483

Abstract

Surfaktan Natrium Lignosulfonat (NaLS) dari ampas tebu merupakan salah satu pengembangan surfaktan lignosulfonat yang dibuat dari limbah nabati, yaitu adalah ampas tebu. Pada studi ini telah diperoleh hasil sintesa ampas tebu menjadi surfaktan lignosulfonat yang jika dikembangkan akan dapat menjadi alternatif surfaktan sebagai fluida injesi di reservoir minyak. Dari hasil penelitian dan pengujian yang telah dilakukan, surfaktan NaLS ampas tebu ini mempunyai kesamaan komponen dengan surfaktan lignosulfonat standar yaitu terdiri dari gugus ulur alkena, gugus ulur sulfonat, gugus tekuk karboksilat dan gugus tekuk ester. Berdasarkan analisis spektrum NMR, molekul monomer lignosulfonat tersebut mempunyai atom C, O, H dan S di dalam dengan jumlah atom C = 11, O = 8, H = 16, dan S = 1, sehingga rumus empiris monomer lignosulfonat adalah (C11H16O8S)n, dengan massa molekul relatif 308,06. Berdasarkan struktur monomer lignosulfonat ampas tebu, maka gugus-gugus fungsi dalam strukturnya dapat dikelompokkan sebagai gugus hidrofil atau gugus hidrofob dan dapat dihitung nilai HLB (Hidrofil-lipofilik Balance) yang dimiliki oleh surfaktan NaLS ampas tebu tersebut yaitu sebesar 11,62. Dengan nilai HLB ini maka surfaktan NaLS ampas tebu ini sesuai penggunaannya sebagai sistem tipe emulsi O/W (oil in water), yang berarti surfaktan tersebut larut dalam air dan dapat digunakan sebagai fluida injeksi.
POTENSI KEBERHASILAN KULIT UDANG SEBAGAI BAHAN DASAR POLIMER KITOSAN: STUDI LITERATUR Rini Setiati; Septoratno Siregar; Deana Wahyuningrum; M. Taufik Fathaddin
JURNAL PENELITIAN DAN KARYA ILMIAH LEMBAGA PENELITIAN UNIVERSITAS TRISAKTI Vol. 6 No. 1 (2021)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1227.178 KB) | 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.
Synthesis, Characterization and Antioxidant Activity of Kobalt (II)-Hydrazone Complex Yulyani Nur Azizah; Irma Mulyani; Deana Wahyuningrum; Damar Nurwahyu Bima
EduChemia (Jurnal Kimia dan Pendidikan) Vol 5, No 2 (2020)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (623.189 KB) | DOI: 10.30870/educhemia.v5i2.7987

Abstract

The potency of the first-row transition metal complexes with Schiff's base ligand as an antioxidant has been widely studied by researchers. In this study, hydrazone-type Schiff base compounds, salicylaldehyde-2,4-dinitrophenylhydrazone (SDPH), resulted from the condensation of salicylaldehyde (1.5 mmol) and 2,4-dinitrophenylhydrazine (1.5 mmol) were synthesized and characterized with 1H-NMR. The synthesized SDPH was used as ligands in the formation of Co(II) metal complexes. The Co(II)-SDPH complexes were synthesized with reflux reaction at 60oC for 6 hours in molar ratio 1:3. Triethylamine is used to synthesis Co(II)-SDPH, which serves to deprotonate SDPH ligands. ESI-MS analysis showed that the complex is a neutral dimeric complex.The complex has the chemical formula [Co2(SDPH)2[(Et)3N]2(acn)2(OH)2} ([M+Na]+ = 1061 g/ mol), shown on the ESI-MS spectrum. Coordinate bonds between Co (II) metal ions with ligands are observed in the presence of shifting of the C=N wave number, as well as the loss of the vibrating peaks of the O-H groups to the infrared spectra of complexes. The IR spectrum of complexes was suggested that SDPH behave as a bidentate ligand through the azomethine nitrogen atom and phenolic oxygen atom. The ligand and its Co(II) complex have been screened for antioxidant activity against DPPH (2,2-diphenyl-1-picrylhydrazine). Based on the activity test results, the IC50 value of Co(II)-SDPH complex was lower than ligand. These results show that Co(II)-SDPH are potentials as antioxidants.
Hasil Studi Laboratorium Penentuan Karakteristik Alamiah Surfaktan Natrium Lignosulfonat Dari Ampas Tebu Sebagai Fluida Injeksi Di Reservoir Minyak Rini Setiati; Septoratno Siregar; Taufan Marhaendrajana; Deana Wahyuningrum
JURNAL PENELITIAN DAN KARYA ILMIAH LEMBAGA PENELITIAN UNIVERSITAS TRISAKTI Vol. 3 No. 1 (2018)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/pdk.v3i1.2483

Abstract

Surfaktan Natrium Lignosulfonat (NaLS) dari ampas tebu merupakan salah satu pengembangan surfaktan lignosulfonat yang dibuat dari limbah nabati, yaitu adalah ampas tebu. Pada studi ini telah diperoleh hasil sintesa ampas tebu menjadi surfaktan lignosulfonat yang jika dikembangkan akan dapat menjadi alternatif surfaktan sebagai fluida injesi di reservoir minyak. Dari hasil penelitian dan pengujian yang telah dilakukan, surfaktan NaLS ampas tebu ini mempunyai kesamaan komponen dengan surfaktan lignosulfonat standar yaitu terdiri dari gugus ulur alkena, gugus ulur sulfonat, gugus tekuk karboksilat dan gugus tekuk ester. Berdasarkan analisis spektrum NMR, molekul monomer lignosulfonat tersebut mempunyai atom C, O, H dan S di dalam dengan jumlah atom C = 11, O = 8, H = 16, dan S = 1, sehingga rumus empiris monomer lignosulfonat adalah (C11H16O8S)n, dengan massa molekul relatif 308,06. Berdasarkan struktur monomer lignosulfonat ampas tebu, maka gugus-gugus fungsi dalam strukturnya dapat dikelompokkan sebagai gugus hidrofil atau gugus hidrofob dan dapat dihitung nilai HLB (Hidrofil-lipofilik Balance) yang dimiliki oleh surfaktan NaLS ampas tebu tersebut yaitu sebesar 11,62. Dengan nilai HLB ini maka surfaktan NaLS ampas tebu ini sesuai penggunaannya sebagai sistem tipe emulsi O/W (oil in water), yang berarti surfaktan tersebut larut dalam air dan dapat digunakan sebagai fluida injeksi.
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 I Made ARCANA I Made Arcana I Made Arcana I Putu Parwata 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