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All Journal Jurnal Sains dan Teknologi Jurnal Sains Materi Indonesia Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Jurnal Ilmiah Pertanian Indonesian Journal of Chemistry JMM (Jurnal Masyarakat Mandiri) Jurnal Crystal : Publikasi Penelitian Kimia dan Terapannya Unri Conference Series: Community Engagement Indonesian Journal of Chemical Science and Technology Journal of Applied Materials and Technology Journal of Bioprocess Chemical and Environmental Engineering Science Journal of Community Engagement Research for Sustainability Indonesian Journal of Fundamental Sciences Komunita: Jurnal Pengabdian dan Pemberdayaan Masyarakat
Ahmad Fadli
Universitas Riau
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Other

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Kinetika Reaksi Demineralisasi Pada Isolasi Kitin Dari Limbah Ebi Yesi Afriani; Ahmad Fadli; Drastinawati Drastinawati
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 2 (2017): Wisuda Oktober Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Chitin is a biopolymer, used for various fields like cosmetics, biomedical, porous material, absorbent of heavy metal, and dietary. The synthesized of chitin from ebi’s waste by deproteinization and demineralization process was investigated. The aims of this research is to determine the reaction kinetics of demineralization at isolation of chitin with variables of concentration of HCl and stirring rate. The research was started by mixing ebi’s waste powder with HCl concentration of 0,2 N; 0,6 N; 1 N; 1,4 N; and 1,8 N at temperature 29°C and the stirring rate 50, 100, 150, 200, and 250 rpm in the beaker glass and completely with stirrer. The Samples were taken for 15, 25, 35, 45 and 60 minutes in amount 20 mL, then washed until neutral and filtered by a filter paper. Isolated chitin was destructed by H2SO4 and HNO3 to determine calcium carbonate content by titration of complexometry. The results show that reaction kinetic follows pseudo second order equation. Reaction rate constant increases with increasing concentration. The reaction rate in the concentration 0,2 N; 0,6 N; 1 N; 1,4 N; and 1,8 N and stirring rate 150 rpm increased from 0,003 to 0,404 min-1. But stirring rate undefined by approaching of kinetics homogenous reaction. The Range of reaction rate constant is 0,00167- 0,394 min-1.Keywords : biopolymer, chitin, demineralization, ebi’s waste, reaction kinetic.
Pembuatan Trikalsium Fosfat Berpori Menggunakan Metode Protein Foaming-Starch Consolidation Dengan Variasi Penambahan Jumlah TCP Dalam Slurry Dan Kecepatan Pengadukan Lia Yuningsih; Ahmad Fadli; Irdoni Irdoni
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 1 (2016): Wisuda Februari Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Tricalcium phosphate (TCP) has been widely used as a bone substitute material and teeth because it is biocompatible and similar to the mineral structure of human bone. Porous Tricalcium phosphate (TCP) was made by protein foaming-starch consolidation method by using egg white as a pore-forming agent and starch like sago flour as the consolidator. The purpose of this research is to study the effect of stirring rate and addition of TCP in slurry on the physical, chemical and mechanical properties of porous TCP. This research was began by mixing TCP, egg whites, starch and Darvan 821 A by certain composition and then stirred for 3 hours with stirring rate of 100.150 and 200 rpm. The slurry was poured into a mold and dried in an oven at 180oC for 1 hour. Then the samples removed from the mold to produce green bodies. Afterthat, the green bodies were burned at 600 oC and followed by sintering at 1100oC with rate of 2oC/min for 2 hours. This research result shows the porosity of porous TCP bodies increased with increasing stirring rate, but the compressive strength decreased. The addition of TCP in the body was found to increase the compressive strength when the porosity decreased . The TCP with a porosity of 66.67 to 72.77 % and 0,75 to 1,08 MPa compressive strength were found at stirring rate of 100 rpm. Meanwhile, the stirring rate of 200 rpm, the TCP has a porosity from 68,13 to 76,92% obtained 0.68 to 1 MPa compressive strength. Keyword : compressive strength, egg white, porosity,tricalcium phosphate
Dekolorisasi Kitin Menggunakan Aseton Putri Rahmadani; Ahmad Fadli; Komalasari Komalasari
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Chitin is a biopolymer that can be used in the biomedical field. Chitin can be isolated from shrimp waste using chemical methods through deproteination and demineralization processes. To reduce color in chitin required decolorization stage. The purpose of this study was to study the effect of stirring rate and acetone concentration on the decolorization stage on the characteristics of chitin produced and to make mathematical modeling of carotenoid reduction from inside chitin using acetone in the decolorization stage. The research procedure begins with reducing the size of ebi waste into powder sizes. The powder was then reacted with 3.5% NaOH (deproteination), 1:10 (w / v) ratio for 2 h and stirring speed of 150 rpm. The deproteination product is reacted with HCl 1 N (demineralization), 1:15 (w / v) ratio for 1 h and stirring speed of 150 rpm. The demineralization product was decolourized using 60%, 80%, and 100% acetone, a ratio of 1:10 (w / v) at 70 ° C with a stirring rate of 0.150, and 300 rpm for 720 min. Samples were taken every 60 min increments of 5 mL, the solidified yield of the decolorization filtered and dried. The addition of carotenoids in acetone was analyzed using a UV-Vis spectrophotometer. The results showed that the increase of stirring speed and concentration of acetone, carotenoid content in the solvent also increased. The results of colorimeter test for chitin before decolorization had percentage whiteness of 53.2%, while for chitin at 100% acetone concentration with stirring rate 0 rpm and 300 rpm had a whiteness percentage of 57.9% and 70.3 %.Keywords: acetone, decolorization, carotenoid, chitin, shrimp waste
Sintesis Serbuk Hidroksiapatit Menggunakan Metode Mechanochemical Siska Priscillia Aledya; Ahmad Fadli; Zultiniar Zultiniar
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Hydroxyapatite (HAp) is a material that has the same structure and material composition with the main minerals of teeth and human bones so it can be used as bone and dental implants. The purpose of this study was to synthesis hydroxyapatite, determine the effect of variations in the ball sizes and the ratio of a mass of precursors to balls size of crystals and particles, and morphology of hydroxyapatite produced by the mechanochemical method. First, 0,5 gram Calcium Oxide (CaO), 0,6 gram ammonium dihydrogen phosphate (NH4H2PO4) and 10 ml distillate water with a mole ratio of Ca/P 1,67 were milled using Shaker Mill PPF UG. Two different ball sizes (3mm and 6mm) and three different PBRs (1:1,439; 1:2,878; and 1;4,318) were used in this methode. Precursor and balls were milled in milling speed 850 rpm for 6 hours with interval every 15 min paused for 5 min. The slurry dried in an oven with 120°C for 2 hours then sintered at 900°C for an hour. The synthesized powder was analyzed by XRD, PSA, and SEM confirmed the formation of HAp structure with nanocrystallite size, morphology in all variables. The crystallite size increased with increasing PBR. At PBR 1:2,878 and ball size 6 mm was obtained crystallite size about 24,78 nm with 95% crystallinity. The particle size decreased with increasing PBR. Morphology of hydroxyapatite was ununiform to granular with mol ratio Ca/P 1,81.Keywords: ball mill, hydroxyapatite, mechanochemical, powder to ball ratio
Sintesis Hidroksiapatit Dari Cangkang Telur Dengan Metode Presipitasi Novika Sri Wardani; Ahmad Fadli; Irdoni Irdoni
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 1 (2015): Wisuda Februari Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Hydroxyapatite powder from eggshell waste as biomaterial has been succesfully synthesized using precipitation method with variation of ratio Ca/P and reaction temperature. High incidence of bone destruction in Indonesia led to an increased need for biomaterials as bone substitute forexample is HAp. The purpose of this study is to assess the effect of the molar ratio of Ca / P and the temperature reaction to hydroxyapatite and characterization of eggshells using AAS and products with XRD, SEM – EDX, and FTIR. Eggshell was calcined at temperature 1000°C to produce calcium oxide (CaO). CaO dissolved in nitric acid (HNO3) to produce Ca(NO3)2 then mixed gently with diammonium hydrogen phosphate was dissolved into aquabidest . HAp produced has ratio Ca/P <1,67. Absorption band of OH-, CO32-, and PO43- groups indicate HAp compounds, but it also contained carbonated hydroxyapatite (CHAp) and tricalcium phosphate (TCP) group. The morphology of HAp particle have a granular shape. The particle size of HAp is getting smaller with increasing the ratio of Ca/P in the range of 69-53 nm and greater with increasing reaction temperature which ranges from 39-47 nm.                                                                 Keywords : Calcination, eggshell, Hydroxyapatite, precipitation
Pembuatan Scaffold Trikalsium Fosfat Berpori Menggunakan Metode Protein Foaming-Consolidation Dengan Variasi Waktu Dan Temperatur Pengeringan Gede Indra Ludy Wirata; Ahmad Fadli; Fajril Akbar
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 1 (2016): Wisuda Februari Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Tricalcium phosphate (TCP) is a ceramics material which is widely used for bone subtitude. Protein foaming-consolidation method is a technique for production of porous tricalciumphosphate (TCP) using egg yolk as pore creating agent. The purpose of this research was to investigate the effect of time and drying temperature effect on physical, chemical and mechanical properties of porous TCP and characterizing porous TCP as bones implant. This research start by mixing TCP powder, sago powder, Darvan 821A and egg yolk. The slurries were mechanical stirred at 150 rpm for 3 hours. Then, the slurries were casted in a cylindrical stainless stell moldand heated at 160oC, 180°C and 200oC for 5, 10, 15, 20, 30, 40, 50 and 60 minutes. Subsequently, dried samples were demolded and burned at 600°C for 1 hour.,For the final steps,samples were sintered at 1150oC for 1 hour. The results of porous TCP from this research was 45.90-61.70% for porosity, the density was 1.20-1.72 g/cm3 and the compressive strength was 8.04-8.64 Mpa.Keyword : tricalcium phosphate, egg yolk, porosity, density, compressive strength
Kinetika Reaksi Sintesis Hidroksiapatit Menggunakan Metode Presipitasi Dengan Pencampuran Langsung Fadhil Mubarak; Ahmad Fadli; Fajril Akbar
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 1 (2016): Wisuda Februari Tahun 2016
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Abstract

Hydroxyapatite is a ceramic material that has chemical composition and crystal structure similar to the human bone, then it iscompatible to use as bone implant. The most one of method that used production of hydroxiapatite is precipitation method. The aim of this research is to determine the kinetics reaction of the synthesis of hydroxyapatite using one drop precipitation method. The research was started with stirred 8.27 grams of CaO in 200 ml of aquadest.Then added with 1,8 M phosphoric acid in to while heated with a temperature variation of 40°C, 50°C and 60°C and stirring rate of 300 rpm. The solution in reactor were taken every 10 minutes by 20 ml volume. Further samples were filtered with filter paper, and then the filtrate was analyzed by complexometric titration. The results showed that the reaction followed pseudo second order equation. Constans of reaction increases with increasing temperature following Arrhenius equation, at stirring rate of 300 rpm obtained k = 1,97e- (13194,4 / RT).Key words : ceramic, hydroxyapatite, reaction kinetic, precipitation
Pengaruh Jumlah Siklus Dip-Drying Pada Sintesis Koating Tembaga-Kobalt Oksida Berbasis Nitrat Konsentrasi Tinggi Sebagai Solar Selective Absorber Dengan Metode Sol-Gel Dip-Coating Benny Ahmadi; Amun Amri; Ahmad Fadli
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 1 (2017): Wisuda Februari Tahun 2017
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Abstract

Solar Selective Absorber (SSA) is the most important part that determines the efficiency of solar thermal collectors. SSA should have high absorptance (low reflectance at wavelengths <2.5 m) and low emitance (high reflectance at wavelengths> 2.5 m). Solar selective absorber can be synthesized using sol-gel dip coating method. The purpose of this research is to know the effect variation number of dipping-drying cycles to absorptance copper-cobalt coating and get a coating of copper cobalt that have absorptance value is high (> 80%) and low emitance (<10%). The coating were synthesized by molar percursors 0.25:0.5M and number of dipping-drying cycles 1x, 2x, 3x, 4x, 6x, 8x and 10x. Reflektance spectra in the area of UV-Vis-NIR showed that increased cycles of dipping-drying cycles (which increases the thickness of the coating) increase the value of absorptance (α). The results showed that the highest absorptance value found in coatings which was synthesized using mixture copper nitrate and cobalt nitrate 0.25:0.5M M at 2x cycles (dipping and drying) with absorptance (α) = 84.90%. Further characterization showed emitance values (ε) = 13.2%.Keywords : aluminum, coating, solar selective absorber and sol-gel dip-coating
Pembuatan Macroporous Microcarrier Berbahan Baku Hydroxyapatite Menggunakan Kuning Telur Sebagai Agen Pembentuk Pori Dwi Yerlis Rahmi; Ahmad Fadli; Idral Amri
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 2 (2017): Wisuda Oktober Tahun 2017
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Abstract

Porous hydroxyapatite is a crystalline molecule composed of calcium and phosphorus which can be used as a macroporous microcarrier. Macroporoous microcarrier is one of tissue engineering technology that consist of support matrix and can be used as a cell culture medium in bioreactor. Protein foaming-starch consolidation method is choosed for manufacturing porous hydroxyapatite with egg yolk as a pore-forming agent. The purpose of this research is to study the influence of process variables i.e yolk addition (27 - 33 gr), sintering temperature (1200oC - 1300oC), and drying temperature (170oC - 190oC) toward porous hydroxyapatite properties such as compressive strenght, porosity and pore size made by protein foaming – starch consolidation methode. The experimental resulted porous hydroxyapatite with compressive strength in range of 4.55 - 11.05 MPa, porosity in rang of 25.95 - 58.74% and pore size in range of 15.08 - 33.56 μm.Keywords: compressive strength, pore size, porosity, porous ceramic
Kinetika Sintesis Hidroksiapatit Menggunakan Metode Hidrotermal Suhu Rendah Dengan Pendekatan Shrinking Core Model Nurul Afifah; Ahmad Fadli; Edy Saputra
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 1 (2016): Wisuda Februari Tahun 2016
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Abstract

Hydroxyapatite (HA) is a ceramic that can be used as bone implants and teeth. Hydroxyapatite can be synthesized from Calcium Oxyde (CaO) commercial reacted by ammonium dihydrogen phosphate (NH4H2PO4). The purpose of this research are to determine the effect of time and temperature on characteristic of HA synthesis by low temperature hydrothermal method as well as to determine the kinetics model of HA synthesis by using the approach of shrinking core models. There are 3 models are used, the diffusion through liquid film, diffusion through HA layer, and chemical reactions. The procedure was started with synthesized 36.9 gr NH4H2PO4 was dissolved in 600 mL of water and then added 30 gr CaO with temperature of 70°C, 80°C, 90°C and reaction time of 10 minutes - 480 minutes. The mixture was stirred rate of 300 rpm until paste formed. Then the paste was dried in the oven at temperature 120°C for 12 hours and calcined at a temperature of 900oC for 1 hour. The results of this research showed that obtained products were containing 97% HA. The best of kinetic model that described HA synthesis was model of diffusion through HA layer , with formula:Keywords: hydroxyapatite, hydrothermal, CaO, kinetics model, shrinking core.
Co-Authors Abdul Rasyid Achmad Noerkhaerin Putra Ade Pratama Adela Shofia Addabsi Adha Widoni Adi Maulana Putra Adi Mulyadi Putra Adrianto Ahmad Afrila Afrila Agung Prabowo Agung Prabowo Agung Prabowo Agung Prabowo Ahmad Riadi S Hasibuan Ahmad Zaki Alfarisi, Cory Dian Allailus Syah Safara Allailus Syah Safara Alltop Amri Ya Habib Amun Amri Annisa Aprilya Putri Annisa Rahmat Ari Aditia Sukma Sukma Arisman Adnan Ariya Eka Alel Arosyidin Arosyidin Aulia Permatasari Aulia Permatasari Bahruddin Bahruddin Benny Ahmadi Bima Wandika Putra Charismayani Charismayani Damayanti, Elok Debora Tambunan Deden Saprudin Deni Astika Deni Noviana Derry Hanriansyah Pratama Deska Deska Dewi Indah Pratiwi Dhamala Shobita Chandra Dhanang Hayuningwang Dion Julio Iskandar Dovy Reyandi Drastinawati Drastinawati Drastinawati Drastinawati Dwi Yerlis Rahmi Edy Saputra Ervina Ervina Esty Octiana Sari Esty Octiana Sari Fachry Abda El Rahman Fadhil Mubarak Fajril &#039; Akbar Fajril Akbar Feblil Huda Ferdy Ashari Syawal Fernando Susilo Gading Bagus Mahardika Gede Indra Ludy Wirata Heni &#039; Ismawati Heni Ismawati Heni Sugesti Herry Novriansyah Idral Amri Ika Karina Ilham Habib Indah Fitriani Indra Purnama Indra Yasri Ines Indriyani Irdoni HS Irdoni Irdoni Iwantono Iwan Barnawi Jabosar Ronggur Hamonangan Panjaitan Jenial S Julharmito Julharmito Komalasari Komalasari Lia Yuningsih Lilis Suriani Luci Octaria M Satria Haruda Marlinda MAYANG SARI Mayangsari Mayangsari Melda Helena S Miftah Anugrah Mochamad Reizal Ath Thariq Muchlis Ade Putra Muh Irwan Muhamamad Rizky Zuriadi Muhammad Hamdani Muhammad Reski Muhammad Syafiq Izzuddin Mustika Canra Mutamima, Anisa Nisa Mulya Nissa Aqhilla Novika Sri Wardani Nuraina Siregar Nurfajriani Nurfajriani Nurfatihayati Nursyaniati Nursyaniati Nurul Afifah Ongky Alexander Ongky Alexander Padil Padil Panca Setia Utama Pancasila Putri Peter Peter Prihartini Widiyanti Putri Arini Putri Rahmadani Rahimah Rahimah Rahmad Rasyidin Rani Handayani Rathesa Najela Rawdatul Fadila Ridho Wijaya Riki Rahmadhan Rio Andika Ririn Puji Hastuti Rozanna Sri Irianty Rusydy Rusydy &#039; Septiana Veronika S Silvia Reni Renti Silvia Reni Yenti Silvia Reni Yenti Silvia Reni Yenti Silvia Reni Yenty Siska Priscillia Aledya Siti Chotijah Sri Murda Niati Sri Murda Niati Subkhan Maulana Suhendri Sukoco Sukoco Sukoco Sukoco Sunarno Sunarno Sunarno Sunarno Syarifuddin Oko Syelvia Renni Yenti Thomson Simanjuntak Toni Ardi Ulfah Naida Marbun Wan Elsa Novtari Adiani Wasty Rusjaya Wilda Zakiah Wiriyan Jordy Wisrayetti Wisrayetti Wisrayetti Wisrayetti Wisrayetti Wisrayetti Wyda N Saragi Yelmida Azis Yelmida Aziz Yesi Afriani Yogi Yolanda Yunus Olivia Novanto Zakwan Zuchra Helwani Zultiniar Zultiniar Zultiniar Zultiniar Zultiniar Zultiniar