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FABRIKASI SERAT NANO BERBASIS POLIMER MENGGUNAKAN TEKNOLOGI ELECTROSPINNING Hentihu, M. Fahrur Rozy; Sholahuddin, Imam
ROTOR Vol 8, No 1 (2015)
Publisher : ROTOR

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Nano fibers can be fabricated using electrospinning technology using local components at low cost. Electrospinning technology also has advantages to control the morphology, uniformity, porosity and composition of nano fiber by pumping a solution of the gel through the nozzle of a metal-needle high voltage electrified. Based on the results of the research, the general parameters required for the manufacture of electrospinning machine is a resolution rate of spraying the solution (Î¼â / min) and the magnitude of the high voltage power source (kV). A human hair is approximately 60 Î¼m size looks larger than the size of the resulting PVA fiber electrospinning machine. These results were confirmed by the results of fiber characterization using the AFM in the area of ââfiber 50 Î¼m x 50 Î¼m, fiber size in the range of <1 Î¼m are included in the order of 1000 nm. It can be concluded that the electrospinning machine that has been made in this study has been able to create nanometer-scale fibers.

FABRIKASI DAN KARAKTERISASI NANOGENERATOR BERBASIS NANOFIBER-NANOWIRE ZnO Sholahuddin, Imam; Hentihu, M. Fahrur Rozy
ROTOR Vol 8, No 1 (2015)
Publisher : ROTOR

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (238.356 KB)

Fiber diffusion process when the fiber is still green on a plate collector and the thermal decomposition process followed by the formation of ZnO crystal nucleation has a very large role of the morphology of the final form of fiber products. Conversely, a positive result occurs in nanowire growth process. At the time of natural air pressure conditions and the presence of oxygen in the air in the process of sintering for 2 hours without using a catalyst, ZnO crystals can grow by itself (self-growth) into a nanowire. As a material nanogenerator, this situation provides an additional active area to excite the tap-off force into electrical voltage of up to 234.55 mV (2 Î¼â / min).

ORIENTASI SUDUT LILITAN BENANG KATUN TERHADAP KEKUATAN TARIK PADA PIPA KOMPOSIT FILAMENT WINDING Ardian Dwi Saputra; M. Fahrur Rozy H; Agus Triono; Imam Sholahuddin
ROTOR Vol 10 No 1 (2017)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Cotton fibers currently use in many industries textiles, easy gotten in the market, and a cheap price. Using of fiber would be able to solve the environtment problems, reduce the metal using, particularly in the oil and gas industries. In this study, composite pipes are made by cotton fibers as reinforcement, particles of montmorillonite as filler, and unsaturated polyester as matrix. From that consideration this study was conducted to obtain that analysis of tensile strength composite cotton fibers. With the pattern of variation woven fiber direction angle towards the corner fibers 450, 550, 650, 750, and 850. From the test results the highest tensile strength values is obtained by a composite pipe with fiber direction angle of 850. The test results showed that the tensile strength of the cotton fiber reinforced composite pipe with direction of 450 angle fiber is 3.76 MPa, for direction of 550 angle fiber tensile strength is 1.28 MPa, for direction of 650 angle fiber tensile strength is 10.691 Mpa, for direction of 750 angle fiber tensile strength is 14.465 Mpa, and for direction of 850 angle fiber tensile strength 28.617 MPa. Keywords: Cotton fiber, unsaturated polyester, filament winding method, montmorillonite, Tensile Strength

FABRIKASI SERAT NANO BERBASIS POLIMER MENGGUNAKAN TEKNOLOGI ELECTROSPINNING M. Fahrur Rozy Hentihu; Imam Sholahuddin
ROTOR Vol 8 No 1 (2015)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (239.886 KB)

Nano fibers can be fabricated using electrospinning technology using local components at low cost. Electrospinning technology also has advantages to control the morphology, uniformity, porosity and composition of nano fiber by pumping a solution of the gel through the nozzle of a metal-needle high voltage electrified. Based on the results of the research, the general parameters required for the manufacture of electrospinning machine is a resolution rate of spraying the solution (μℓ / min) and the magnitude of the high voltage power source (kV). A human hair is approximately 60 μm size looks larger than the size of the resulting PVA fiber electrospinning machine. These results were confirmed by the results of fiber characterization using the AFM in the area of fiber 50 μm x 50 μm, fiber size in the range of <1 μm are included in the order of 1000 nm. It can be concluded that the electrospinning machine that has been made in this study has been able to create nanometer-scale fibers.

FABRIKASI DAN KARAKTERISASI NANOGENERATOR BERBASIS NANOFIBER-NANOWIRE ZnO Imam Sholahuddin; M. Fahrur Rozy Hentihu
ROTOR Vol 8 No 1 (2015)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (238.356 KB)

Fiber diffusion process when the fiber is still green on a plate collector and the thermal decomposition process followed by the formation of ZnO crystal nucleation has a very large role of the morphology of the final form of fiber products. Conversely, a positive result occurs in nanowire growth process. At the time of natural air pressure conditions and the presence of oxygen in the air in the process of sintering for 2 hours without using a catalyst, ZnO crystals can grow by itself (self-growth) into a nanowire. As a material nanogenerator, this situation provides an additional active area to excite the tap-off force into electrical voltage of up to 234.55 mV (2 μℓ / min).

PENGARUH KONSENTRASI INHIBITOR UBI UNGU TERHADAP LAJU KOROSI BAJA KARBON A53 DENGAN MEDIA AIR LAUT Ridho Unggul Nur Rahmadi; Imam Sholahuddin; Dwi Djumhariyanto
ROTOR Vol 10 No 2 (2017)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Corrosion is a form of damage that occurs in metals. The main factor is the cause of the corrosion environment. A53 steel is a type of low carbon steel and a steel material types that are widely used for pipe applications. The use of a corrosion inhibitor is one way of preventing corrosion. Anthocyanin substances contained in purple yam can be made in a natural inhibitor, because the substance is an antioxidant anthocyanin which is an oxidation inhibitor. Variables used were varied concentration of 0 ppm, 2000 ppm, 4000 ppm and 6000 ppm. This study aims to determine the rate of corrosion, purpel sweet potato extract efficiencies and changes in microstructure. The method used in this study is experimental, inhibitor efficiency analysis, ANOVA test and analysis micro photo. The results showed that the material is corroded by pitting corrosion and uniform shape. Values on concentration lowest corrosion rate of 0.0044 mmpy 6000 ppm and 6000 ppm at the highest efficiency of 72.70%. Keywords: anthocyanin, steel A53, natural inhibitor, purple sweet potato.

PENGARUH LAJU PREKURSOR SERBUK ALUMINIUM TERHADAP BENTUK MORFOLOGI NANOPARTIKEL ALUMINA DENGAN METODE THERMAL PLASMA Havid Arifian Rochman; Arief Ginanjar Dirgantara; Salahudin Junus; Imam Sholahuddin; Aris Zainul Muttaqin
ROTOR Vol 10 No 1 (2017)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

The synthesis of nanoparticles using thermal DC plasma method is a simple method for ease of installation and high efficiency is due to the rate of precursor that can be controlled. Micro-sized aluminum powder is synthesized using thermal DC plasma undergoing a process of evaporation as it passes through high temperature plasma flame, where kemuadian oxidized aluminum particles which evaporates the particles are split and binds with oxygen to form aluminum oxide or also known as alumina (Al2O3). In this experiment, the flow rate of oxygen plasma parameters at 35 SCFH (Standard Cubic Feet per Hour) and 20 amperes flows with precursors rate variation of 1.16 g / min, 3.19 g / min, and 3.5 g / min. Precursors used is 88 micro sized aluminum powder. To determine the morphology of nanoparticles of alumina testing scanning electron microscopy (SEM), the morphology form of nanosphere. Results of the analysis showed that the rate of precursor low causing agglomeration level slightly while the higher rate of precursor agglomeration rate also increased. At the rate of precursor 1.16 g / min, nanoparikel undergo agglomeration with an average particle size of 36.55 nm, and then at a rate of 3.19 gr precursor / mnt an average particle size of 46.49 nm, and at a rate of 3.5 gr / mnt an average particle size of 46.49 nm. The powder nanoparticles were then characterized using X-ray defraksi (XRD) where all alumina nanoparticles were synthesized showed alumina phase that is formed is a phase δ-Al2O3. Keywords: Alumina nanoparticles, DC Thermal Plasma, morphology, precursor rate, nanoparticles size, SEM, XRD.

STUDI EMISI SPEKTRA PADA SINTESIS PEMBAKARAN METAL ALUMINIUM DALAM PLASMA-UDARA Imam Sholahuddin; Andi Sanata
ROTOR Vol 15 No 1 (2022)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Research on emission spectra of metal combustion at temperatures above the boiling point of Al has been successfully carried out. This method can be used as a qualitative characterization of the presence of elements or compounds involved in the combustion process. Recording of emission spectra data was carried out during the process of burning Al powder with oxygen O in an air plasma flame at atmospheric pressure. The burning characteristic of Al was detected at the peak intensity of the wavelength λAl = 396 nm, and the reaction products of AlO with the peak intensity of the wavelength λAlO were 471, 489 and 512 nm, respectively. The absolute temperature of the plasma flame black body was 5660 K based on the highest peak intensity λAlO = 512 nm. The increase in emission intensity was quite significant when Al was started to be injected at 1.25 seconds, followed by an unstable plasma form. The steady state of the plasma flame indicates a full reaction in the vapor phase of AlO(g) in the form of Al sub-oxide and alumina before condensing on the outer surface area of the plasma. High temperature thermal plasma-air can increase the homogeneity of the atomization process of particles into gaseous vapor which is an important initiation where nanoscale AlO particles begin to form.

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