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All Journal Rotasi Ganendra: Majalah IPTEK Nuklir Urania Jurnal Ilmiah Daur Bahan Bakar Nuklir Jurnal Sains dan Teknologi Nuklir Indonesia (Indonesian Journal of Nuclear Science and Technology) Rekayasa Mesin JTERA (Jurnal Teknologi Rekayasa) Indonesian Journal of Chemistry Jurnal Kartika Kimia Majalah Ilmiah Pengkajian Industri Kappa Journal Jurnal TEDC Metalurgi Journal Of Chemical Process Engineering
Djoko Hadi Prajitno
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Journal : Jurnal Kartika Kimia

 1 
The Effect of Variations in Current and Time to Manufacture Powder Tin (Sn) via Electrodeposition Process Raden Henny Mulyani; Yuliani Carisca Tanjung; Djoko Hadi Prajitno
Jurnal Kartika Kimia Vol 2 No 1 (2019): Jurnal Kartika Kimia
Publisher : Department of Chemistry, Faculty of Sciences and Informatics, Jenderal Achmad Yani University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (915.456 KB) | DOI: 10.26874/jkk.v2i1.21

Abstract

Manufacture of powder metallurgy through the process of electrolysis, resulting in the phenomenon of deposition on the cathode. Electrolysis process produces high purity but many compounds decompose participating will affect its purity. Pulverizing tin (Sn) is done by varying the amount of current (5 A , 6 A and 7 A) and processing time (20 minutes , 25 minutes and 30 minutes) with variable fixed temperature of 50 ° C and solution concentration of 0.01 M. Electrode used is stainless steel 304 as the cathode and tin (Sn) as the anode. Powder tin (Sn) generated reaches 80 % , the most current efficiency is obtained from the current 6 A with a time of 20 minutes and the lowest energy consumption derived from the current of 5 A at 20 , 25 and 30 minutes at 4.6 KWH / kg Sn. From the results obtained are expected to be a material consideration in producing powder tin (Sn).
Elektrodeposisi Komposit Hidroksiapatit-Kitosan dari Bahan Lokal pada Baja Tahan Karat SS 304 Sarah Nasma'ul Aulia; R. Henny Mulyani; Djoko Hadi Prajitno
Jurnal Kartika Kimia Vol 2 No 2 (2019): Jurnal Kartika Kimia
Publisher : Department of Chemistry, Faculty of Sciences and Informatics, Jenderal Achmad Yani University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (578.67 KB) | DOI: 10.26874/jkk.v2i2.37

Abstract

In this Research to determine the effect of processing time and the difference of the composition of chitosan in Hydroxyapatite (HA) solution to the weight efficiency of the result from the electrodeposition process, it was used 9 samples but only 3 were carried out into characterization testing they’re HA + Chitosan 10% sample (5 hours), HA + Chitosan 20% (1 hour), HA + Chitosan 20% (5 hours), the current density used during the electrodeposition process is 1.8 A / cm3. The process of stirring with an ultrasonic stirrer is important, so that the colloidal powder contained in the electrolyte solution becomes homogeneous. Characterization tests include X-ray Diffraction (XRD) testing, scanning Electron Microscopy (SEM) and Simulated Body Fluid (SBF). The addition of chitosan to HA alloy solutions is very useful to increase the stickiness of the sediment layer on the substrate, because the properties of HA is very fragile when in direct contact with human body fluids its because of the low level of stability. In this study the highest peak on the X-Ray Diffraction pattern was found in the composite HA + Chitosan 20% (1 hour), which is the position 31.91, and for the% weight of calcium (Ca) in the HA + Chitosan sample 20% (1 hour) also the highest among other samples was 27.03%. From the SBF test results, the highest corrosion rate in the HA + Chitosan 10% sample is 1.076 mpy, while for the HA + Chitosan sample 20% is only 0.058 mpy. Keywords: Electrodeposition, Hydroxyapatite, Chitosan, Ultrasonic Stirrer, XRD, SEM-EDS, SBF, Calsium
Ketahanan Korosi pada Paduan Mg –1Mn–HA Sebagai Bahan Biomaterial Hasil Proses Mechanosynthesis dalam Media Ringer Lachtate Ihwan Bayu Setiawan; Djoko Hadi Prajitno; R Henny Mulyani
Jurnal Kartika Kimia Vol 4 No 1 (2021): Jurnal Kartika Kimia
Publisher : Department of Chemistry, Faculty of Sciences and Informatics, University of Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26874/jkk.v4i1.71

Abstract

Biomaterial dari bahan biodegradable akhir - akhir ini sedang dilakukan penelitian lebih lanjut untuk menggantikan biomaterial non biodegradable yang memiliki sifat toksisitas di dalam tubuh namun material biodegradable memiliki sifat kimia-fisika dan sifat mekaniknya belum menyerupai tulang asli maka dari itu butuh paduan yang tepat untuk biomaterial biodegradable. Magnesium memiliki sifat biodegradable, biocompatible, non toxic, dengan modulus elastisitas 42 GPa yang relatif dekat dengan modulus elastisitas tulang (3 – 40 GPa). Metode yang digunakan dalam pembuatan biomaterial dari bahan biodegradable adalah pemaduan mekanik pada paduan Mg – 1%Mn - Hydroxyapatite menggunakan metode mechanosynthesis. Dengan waktu milling 2 jam dengan kecepatan 1000 rpm. Tekanan Kompaksi 10 MPa serta waktu sintering 2 jam sehingga menyebabkan terbentuknya porositas yang dihasilkan dari metode ini diisi oleh hydroxyapatite (HA) bereaksi membentuk ikatan jaringan dengan tulang. Karakterisasi paduan Mg – 1%Mn – HA dilakukan dengan menggunakan pengujian kekerasan micro vickers, metalografi, laju korosi, SEM – EDS, dan XRD. Nilai kekerasan dari paduan Mg – 1Mn, nilai rata – rata kekerasan pada paduan Mg – 1Mn Non HA yaitu 34,87 HVN, Mg – 1Mn – 10% HA yaitu 42,03 HVN, Mg – 1Mn – 15% HA yaitu 43,19 HVN, dan Mg – 1Mn – 20% HA yaitu 47,79 HA. Analisis XRD dapat diketahui bahwa fasa yang terbentuk pada paduan Mg-1%Mn yaitu terbentuk paduan Mg + α Mn, dan pada padauan Mg-1%Mn yaitu terbentuk Mg + α Mn dan Ca10(Po4)6(OH)2. Nilai laju korosi pada paduan Mg – 1Mn – Non HA memiliki laju korosi 1.035e3 mpy sedangkan pada sampel paduan Mg – 1Mn – 10% HA memiliki laju korosi 487 mpy. Kata Kunci : Biomaterial, Biodegradable, Mechanosynthesis, Hidroxyapatite. Larutan Ringer Lachtate
Co-Authors Achmad, Tria Laksana Ahmad Syafiq Akhmad Ardian Korda, Akhmad Ardian Ambardi, Pradoto Ambardi, Pradoto Andi Mustari, Asril Pramutadi Aprilianda, Adam Artawan, I Nengah Bambang Ariwahjoedi Basuki, Eddy Agus Budi Prawara Dani Gustaman Syarif Dzikry Syamsul Nur Alam Engkir Sukirman Erie Martides Henny Mulyani I Gde Antha Kasmawan Ihwan Bayu Setiawan Immanuel, Perdana Jihad, Bagus Hayatul Lestari, Ernyta Mei Mohamad Iqbal Nurrobi Muhammad, Fadhli Murzid, Jihan Qothrunada Mustari, Asrili Pramutadi Andi Nur Alam, Dzikry Syamsul Nur Alam, Dzikry Syamsul Pawawoi, Pawawoi Pradoto Ambardi Pratama, Ahmad Brian R Henny Mulyani R. Henny Mulyani Raden Henny Mulyani Rahmanullah, Andhika Abdan Romadhona, Candra Dewi Roswita, Fahma Sarah Nasma'ul Aulia Setianto, Muhamad Hananuputra Setiawan, Yuniarto Hendrik Spardi, I Wayan Sri Bimo Pratomo, Sri Bimo Wafda, Hakimul Wayan Gede Suharta Widiawati, Nina Yongjin Kim, Yongjin Yuliani Carisca Tanjung