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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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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 | 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.
ANALISA SPEKTRUM INFRA RED PADA PROSES SINTESA LIGNIN AMPAS TEBU MENJADI SURFAKTAN LIGNOSULFONAT Rini Setiati; Deana Wahyuningrum; Sugiatmo Kasmungin
PROSIDING SEMINAR NASIONAL CENDEKIAWAN Prosiding Seminar Nasional Cendekiawan 2016
Publisher : Lembaga Penelitian Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/semnas.v0i0.903

Abstract

Secara umum, lignin adalah salah satu komponen penyusun tumbuhan yang biasa terakumulasi pada batang tumbuhan berbentuk pohon dan semak. Ampas tebu adalah salah satu bahan limbah yang di dalamnya masih terdapat lignin. Ampas tebu adalah hasil samping dari proses ekstraksi cairan tebu. Ampas tebu yang dipergunakan adalah ampas tebu setelah proses penggilingan ke lima kali dari proses pembuatan gula. Selama ini ampas tebu digunakan sebagai bahan bakar pabrik gula dan pakan ternak. Dengan proses pemisahan lignin dari ampas tebu dapat memberi nilai tambah pemanfaatan ampas tebu sekaligus sebagai alternatif mendapatkan surfaktan nabati. Surfaktan komersial yang selama ini telah digunakan umumnya berbahan baku minyak bumi. Lignin merupakan bahan baku pembentuk Lignosulfonat sebagai salah satu jenis surfaktan anionik yang digunakan sebagai bahan baku pada Injeksi Surfaktan untuk meningkatkan perolehan produksi minyak. Salah satu metoda sintesa yang digunakan untuk memisahkan lignin dari ampas tebu adalah menggunakan Natrium Hidroksida. Hasil lignin yang terbentuk dikarakterisasi dengan metode spektroskopis Infra Red untuk mengetahui gugus-gugus fungsi khas yang terdapat pada struktur lignin dan dibandingkan dengan spektrum lignin komersial standar . Selanjutkan dilakukan proses sulfonasi untuk membentuk lignosulfonat yang hasilnya juga diuji dengan Infra Red dan dibandingkan dengan spektrum sulfonat komersial standar sehingga dapat diketahui komponen di dalamya.
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 : Department of Chemical Engineering - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (116.225 KB) | 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 : Department of Chemical Engineering - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1783.519 KB) | 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 
The Synthesis of Imidazoline Derivative Compounds as Corrosion Inhibitor towards Carbon Steel in 1% NaCl Solution Deana Wahyuningrum; Sadijah Achmad; Yana Maolana Syah; Buchari Buchari; Bambang Ariwahjoedi
Journal of Mathematical and Fundamental Sciences Vol. 40 No. 1 (2008)
Publisher : Institute for Research and Community Services (LPPM) ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/itbj.sci.2008.40.1.4

Abstract

Oleic imidazoline is one of the nitrogen containing heterocyclic compounds that has been widely used as commercial corrosion inhibitor, especially in minimizing the carbon dioxide induced corrosion process in oilfield mining. In this present work, some imidazoline derivative compounds have been synthesized utilizing both conventional and microwave assisted organic synthesis (MAOS) methods, in order to determine their corrosion inhibition properties on carbon steel surface. The MAOS method is more effective in synthesizing these compounds than the conventional method regarding to the higher chemical yields of products (91% to 94%) and the shorter reaction times (7 to 10 minutes). The characterization of corrosion inhibition activities of the synthesized products towards carbon steel in 1% NaCl solution was determined by the Tafel plot method. The corrosion inhibition activities of compound 1b ((Z)-2-(2-(heptadec-8-enyl)-4,5-dihydroimidazol-1-yl)ethanamine), 2b ((Z)-2-(2-(heptadec-8-enyl)-4,5-dihydroimidazol-1-yl)ethanol) and 3b (2-(2-heptadecyl-4,5-dihydroimidazol-1-yl)ethanamine) at 8 ppm concentration in 1% NaCl solution are, respectively, 32.18%, 39.59% and 12.73%. The heptadec-8-enyl and hydroxyethyl substituents at C(2) and N(1) position of imidazoline ring, respectively, gave the most effective corrosion inhibition activity towards carbon steel compared to the presence of other substituents. The increase in concentrations of compound 1b, 2b and 3b in 1% NaCl solution tends to improve their corrosion inhibition activities. Based on the analysis of the free Gibbs adsorption energy (ÄG0ads) values of compound 1b, 2b and 3b (-32.97, -34.34 and -31.27 kJ/mol, respectively), these compounds have the potential to interact with carbon steel through semi-physiosorption or semi-chemisorption.
Synthesis of Oligosuccinimide and Evaluation of Its Corrosion Inhibition Performance on Carbon Steel in CO2-Saturated 1% NaCl Solution Muhamad Jalil Baari; Bunbun Bundjali; Deana Wahyuningrum
Journal of Mathematical and Fundamental Sciences Vol. 52 No. 2 (2020)
Publisher : Institute for Research and Community Services (LPPM) ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.math.fund.sci.2020.52.2.5

Abstract

Oligosuccinimide (OSI) is an oligomer with several repeating units of succinimide. In this study, OSI was synthesized by thermal condensation between maleic anhydride and ammonium carbonate. The chemical structure of the synthesized compound was confirmed by FTIR and NMR spectroscopy as well as LC-MS characterization. Evaluation of its performance as corrosion inhibitor and the adsorption mechanism on a carbon steel surface in CO2-saturated 1% (w/v) NaCl solution was performed using electrochemical techniques (electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization) and weight-loss methods. These tests were simultaneously carried out for all fractions without separation. The EIS results showed that the inhibition efficiency (IE) of the OSI increased with increasing concentration but decreased at higher temperatures. The potentiodynamic polarization data indicated that the OSI acted as a mixed inhibitor. Adsorption of OSI on the carbon steel generally obeys the Langmuir adsorption isotherm according to curve linearity, which relates the degree of surface coverage to the inhibitor concentration. The standard Gibbs free energy of the adsorption values (∆G° ads) were negative within the range of -33.14 to -38.73 kJ.mol-1, which indicates the spontaneity of the adsorption process on the carbon steel surface and that OSI molecules interacted with the carbon steel through semi-physisorption.
PENGARUH WETTABILITY SURFAKTAN NaLS AMPAS TEBU PADA BATUAN SANDSTONE DALAM PROSES ENHANCED OIL RECOVERY (EOR) Rini Setiati; Septoratno Siregar; Taufan Marhaendrajana; Deana Wahyuningrum
Prosiding Seminar Nasional Pakar Prosiding Seminar Nasional Pakar 2018 Buku I
Publisher : Lembaga Penelitian Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/pakar.v0i0.2596

Abstract

Surfaktan merupakan salah satu fluida injeksi dalam proses EOR untukmenaikkan produksi minyak yang masih tertinggal di reservoir. Salah satujenis surfaktan yang digunakan adalah surfaktan lignosulfonat berbahandasar lignin yang dapat diperoleh dengan proses hidrolisis dan sulfonasi dariampas tebu menjadi produk Surfaktan Natrium Lignosulfonat (NaLS) AmpasTebu. Surfaktan NaLS telah dilakukan uji injeksi pada core sintetis batuansandstone. Hasil penelitian laboratorium menghasilkan perolehan minyaktertinggi terjadi pada injeksi surfaktan pada salinitas 80.000 ppm dengankonsentrasi surfaktan 1,5%. Perolehan terendah terjadi pada injeksi surfaktandengan konsentrasi 4,5% pada salinitas 20.000 ppm. Hasil uji wettability yangtelah dilakukan menunjukkan bahwa penambahan konsentrasi surfaktanmenghasilkan sistem water wet, berarti pemberian surfaktan NaLS ampastebu mampu membuat sifat permukaan menjadi water wet, sehinggasurfaktan NaLS tersebut memenuhi syarat untuk digunakan sebagai fluidainjeksi. Berdasarkan analisa sudut kontak, sudut kontak yang lebih kecilsurfaktan NaLS ampas tebu 4.5% - 20.000 ppm yaitu 28.14o, perolehan minyakhanya mencapai 1.05%. Sedangkan surfaktan NaLS ampas tebu 1,5% -salinitas 80.000 ppm dengan sudut kontak 50,55o , perolehan minyak jauhlebih besar yaitu mencapai 10,71%. Dengan demikian dapat disimpulkanbahwa konsentrasi surfaktan lebih sedikit menghasilkan sudut kontak yanglebih besar dan memberikan kinerja surfaktan yang lebih baik.
Ability of Ectoine to Stabilize Lipase against Elevated Temperatures and Methanol Concentrations I Putu Parwata; Deana Wahyuningrum; Sony Suhandono; Rukman Hertadi
Indonesian Journal of Chemistry Vol 21, No 2 (2021)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.54931

Abstract

Ectoine is one of the compatible organic molecules that can protect the protein from heating, freezing, and chemicals contact. This study aims to investigate the ability of ectoine to stabilize lipase on heating and in methanol treatments as an effort to provide a stable biocatalyst for the production of biodiesel. Various ectoine concentrations were added to lipase solutions, then the mixture was heated, and the residual activity of the lipase was determined. Similar steps were also conducted for methanol treatment. The results showed that ectoine maintained and even improved the catalytic activity of lipase after treatment with either heat or methanol. The addition of ectoine to a final concentration of 110 to 150 mM could maintain lipase activity up to 80% when heating to approximately 95 °C. Additionally, more than 20% of lipase activity increased on heating to temperatures below 75 °C in the presence of ectoine at a final concentration of 25 to 120 mM. Meanwhile, after incubation in methanol at a level of around 84% (v/v), the activity of lipase containing 40–90 mM ectoine was maintained. These results demonstrated that ectoine was highly effective in protecting lipase from heat and methanol.
Performance of N,O-Carboxymethyl Chitosan as Corrosion and Scale Inhibitors in CO2 Saturated Brine Solution Muhamad Jalil Baari; Bunbun Bundjali; Deana Wahyuningrum
Indonesian Journal of Chemistry Vol 21, No 4 (2021)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.64255

Abstract

The presence of salts and dissolved gas like CO2 that is carried with natural gas and crude oil along the pipeline is the main reason for corrosion and scale formation. These problems are usually resolved separately by corrosion inhibitors and scale inhibitors or acidification. Meanwhile, utilizing a compound to resolve both corrosion and scale formation has an advantage in the economic side and working time. N,O-carboxymethyl chitosan or N,O-CMCs is one of the chitosan's derivates. It is water-soluble and has different functional groups. Those properties support its capability as a complexing agent on corrosion and scale inhibitors. Synthesis of N,O-CMCs was carried out by chemical reactions between chitosan and chloroacetic acid under alkaline circumstances. N,O-CMCs product was characterized using FT-IR and 1H-NMR spectroscopy. The inhibition efficiency was analyzed by electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization techniques. The measurements showed that the highest efficiency of corrosion inhibition reached 63.54% when the concentration and temperature were 30 ppm and 35 °C, respectively. N,O-CMCs was classified as a mixed-type inhibitor. The adsorption mechanism of the inhibitor followed Langmuir adsorption isotherm. The static scale inhibition test informed that the optimum inhibition efficiency of N,O-CMCs reached 60.00%.
SINTESIS KOMPLEKS NIKEL(II) DENGAN LIGAN TURUNAN SALISILIDEN ANILIN SEBAGAI SENYAWA POTENSIAL OLED Irma Nuril Maryam; Deana Wahyuningrum; Irma Mulyani
Jurnal TEDC Vol 10 No 1 (2016): Jurnal TEDC
Publisher : UPPM Politeknik TEDC Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (299.841 KB)

Abstract

Senyawa kompleks Nikel(II) dengan ligan turunan salisiliden anilin berhasil disintesis dengan metode MAOS(Microwave Assisted Organic Synthesis) dan di pelajari aktivitasnya sebagai senyawa potensial OLED(Organic Light-Emitting Diode). Senyawa-senyawa imina (E)-2-((4-chlorophenylimino)methyl)phenol (L1) dan(E)-2-((p-tolylimino)methyl)phenol (L2) disintesis dengan pelarut etil l-laktat:air (9:1), rendemen masing-masing97% (Tl: 98-100°C) dan 96% (92-94°C). Berdasarkan analisis spektrum IR, 1H NMR, 13C NMR, dan MSmenunjukkan senyawa L1 dan L2 sudah terbentuk. Kompleks Nikel (II) hasil sintesis berwarna hijau mudauntuk K1 (terdekomposisi pada 190°C) dan hijau tua untuk K2 (terdekomposisi pada 170°C). Analisis IR danUV/Vis pada K1 dan K2 menunjukkan ikatan C-O-M telah terbentuk. Berdasarkan spektrum emisi antara K1dan K2, menunjukkan K2 merupakan senyawa yang lebih berpotensi sebagai OLED daripada K1.Kata kunci : Nikel(II), salisiliden anilin, OLED, MAOS
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