Poppy Puspitasari

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Verified

Poppy verified their affiliation via an institutional email.

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• Ph.D
• Associate Professor at State University of Malang

📢📢📢 *CALL FOR PAPERS!* 📢📢📢 In order to commemorate its 60th anniversary, the Faculty of Engineering, Universitas Negeri Malang (UM), proudly presents *World Conference on Technology, Engineering, and Science (CONTES) 2025* consist of Four Remarkable International Conferences with the theme: *"Integrate Innovative Solutions for a Sustainable Future...

This research examines the impact of a conductive polyaniline (PANI) thin film, cross-linked with formaldehyde, on the photoelectrochemical (PEC) capabilities of zinc oxide (ZnO) nanorods (NRs) for water-splitting purposes. The study involved a two-stage process: initially, ZnO NRs were generated on an indium tin oxide (ITO) substrate through a hyd...

Sugarcane as a raw material for the sugar industry plays a strategic role in the Indonesian economy. Higher production of sugar provides sugarcane waste namely bagasse, as a natural fiber, that has potential for a composite material. This study aims to observe the morphology and crystalline structure of bagasse fiber after chemical treatments using...

This research optimizes the preparation parameters of palm oil-based nanofuel and Multi Wall Carbon Nanotube (MWCNT) to produce stable nanofuel. The parameters optimized include stirrer speed, sonication time, sonication power, and surfactant ratio, with stability measured through absorbance and sedimentation ratio (SR). The Taguchi method, using a...

The metal heat treatment industry has seen substantial growth, with market projections increasing by USD 15.18 billion from 2022 to 2027, driven by advancements in technology. The iron and steel industry significantly contributes to this growth, accounting for six percent of the market share. In this evolving landscape, the Quenching-Partitioning-T...

One common bio-ceramic material used in the biomedical industry is hydroxyapatite. Because of its crystallographic and molecular resemblance to the hard tissues of the human body, hydroxyapatite is thought to form. Scallop shells are one natural source of hydroxyapatite, which is high in calcium. This study examines how the calcination temperature...

Aims In this study, we conducted a bibliometric study about steel casting between the year 2000-2023. We carried out a bibliometric analysis of sand casting, investment casting, die casting, and squeeze casting in which optimization and simulation models are available and have been thoroughly developed to enhance the quality of the casting product,...

Road traffic accidents (RTAs) claim approximately 1.3 million lives globally each year, prompting the United Nations to target a 50% reduction in fatalities and injuries by 2030 through the Sustainable Development Goal (SDG). RTA's often bring negative social and economic impacts to individuals, families and the society; worst being loss of human l...

Researchers have used nanomaterials as additives in base oil to improve its specifications, especially to minimize wear and friction during its applications. In this study, calcium carbonate (CaCO3) nanoparticles were selected as an additive to serve as a protective layer between components and anti-wear properties. In this study, calcium carbonate...

Bioethanol is an alternative fuel that has a high octane value of around 100 to 110, making it difficult to be applied to spark ignition engines directly. So, it is necessary to make adjustments, including increasing combustion efficiency and thermal efficiency of the combustion chamber by increasing the compression ratio and adjusting the ignition...

Peternakan sapi merupakan sektor yang paling potensial di Desa Mulyorejo, Kecamatan Ngantang, Kabupaten Malang. Sapi perah merupakan jenis sapi yang paling banyak diternak yang menghasilkan susu. Permasalahan peternak di Desa ini adalah rendahnya produktivitas susu karena manajemen pakan yang kurang terkontrol dan sisa pakan yang terlalu banyak yan...

Dye-Sensitized Solar Cell (DSSC) is a photovoltaic technology that is eco-friendly, has affordable costs, an easy fabrication process, and high power conversion efficiency. The application of solid electrolytes in DSSC is a promising option compared to using liquid electrolytes because liquid electrolytes easily cause corrosion on the photoanode an...

Biodiesel is one of the alternative forms of diesel fuel and can be obtained using the transesterification process of waste cooking oil with a catalyst to accelerate the reaction. The heterogeneous catalyst from waste scallop shells is used due to its potential for being reused in the subsequent transesterification reactions. Heterogeneous catalyst...

Friction Stir Welding (FSW) is commonly used in transportation industries but faces challenges when joining thick plates. To address this, double-side FSW (DFSW) has been introduced, involving two steps: FSW on one side, flipping the plate, and then FSW on the opposite side. However, this process is time-consuming. To over�come this, a one-step DFS...

We investigate the fabrication of photosensor devices based on dye sensitized solar cells (DSSC). DSSC photovoltaic cells use solar light energy to trigger chemical reactions as a source of electrical energy. DSSC has several advantages, namely low production costs, environmental friendliness, easy fabrication, and high-power conversion efficiency....

Sengon (Albizia chinensis) is a type of forest plant that grows quickly and is widely used to meet human needs. The large number of uses of Sengon wood causes sengon wood waste, such as sawdust, to increase. The study’s aim is to analyze the morphology and structure of sawdust waste after adding magnetic (Fe3O4) nanoparticles. The methods include c...

Die casting offers low cost in mass manufacturing of complex shaped components with acceptable casting results. Further, the selection of die-casting parameters and the addition of reinforcing elements can also improve the mechanical properties of aluminum. In this study, the Al-Si matrix strengthened using High Pressure Die Casting method with rei...

Nano-cutting fluid sprayed using the minimum quantity lubricant (MQL) method is one example of a green manufacturing process. Meanwhile, vegetable oil is an appropriate lubricating base oil as it offers very high lubricating performance and environmental friendliness. Further, CaCO₃ nanoparticles are popular for their capacity to improve lubricatio...

This study analyzes the tribological properties of 5W-30 synthetic oil with the addition of surfactants and oxide nanomaterials. This research used SAE 5W-30 lubricant base material with the addition of Aluminum Oxide (Al2O3), Titanium Dioxide (TiO2), and Hybrid Aluminum Oxide (Al2O3) - Titanium Dioxide (TiO2) nanomaterials. The nano lubricants wer...

The thermophysical, rheological, and tribological properties in lubricant are essential for preserving the engines, power steering systems, and engine components from damage caused by friction and wear. The incorporation of nano-sized particles into lubricating oils has been reported to enhance these properties. Therefore, this study explores the i...

This study explores the efficiency of photovoltaic thermal (PVT) system using bio-nanofluid based on virgin coconut oil (VCO). This research proposes bio-nanofluid as dispersion media because of their potential in medium to high temperature applications in terms of thermal output, biodegradable, and renewable. Graphene nanoplatelets (GNP) were prep...

The interest in metallic foam is increasing since their cellular structures have a unique combination of properties such as high stiffness, low density, lightweight, high specific strength, and thermal insulation. Commonly, the performance of metallic foam can be improved by the heat treatment process. However, the previous heat treatment methods s...

Photovoltaic thermal (PVT) is a technology capable of converting solar energy into energy in the form of electricity and thermal (heat). Absorption of solar thermal energy can cause PVT to experience a high temperature increase which affects the efficiency of electricity that can be generated by PVT. Nanofluid is a fluid with high thermal conductiv...

Morphology, including size, shape, and structure, plays a crucial role in determining heat and mass transfer within materials during thermal conversion processes. This study presents a concise overview of research conducted on the morphological evaluation of a blended composite consisting of microalgae and activated carbon, with a mass ratio of 10:...

This research discusses the effect of using nitrogen-doped activated carbon as an anode material for lithium batteries on the resulting electrochemical properties. The performance of pure activated carbon was compared with that of nitrogen-doped activated carbon with concentrations of 1:3 and 1:5. Activated carbon that has been synthesized into nit...

Pin-on-disc (PoD) testing extensively to investigate material sliding behavior and relevant wear mechanisms under different tribological conditions, result of Pin on Disc testing is worn and coefficient of friction. To identify the optimal parameters of the Pin on Disc test can use the taguchi optimization method. Taguchi method is a reliable and c...

Aluminum alloys emerged as one of the materials used in manufacturing automotive car bodies due to their advantageous properties such as high strength-to-weight ratio, relatively low cost, high ductility, and high corrosion resistance. However, joining aluminum alloys using fusion welding poses serious problems due to the high solubility of hydroge...

Water is one of the indispensable human necessities. The majority of daily activities require water. Along with population growth and changes in people's lifestyles, the need for clean water grows daily. The people who live in Bulupitu village in Gondanglegi likewise recognize the importance of having access to clean water. Due to financial constra...

Titanium alloy has been massively used in automotive and aerospace fields, such as Ti-6Al-4V titanium alloy. Further, the emergence of metallic additive manufacturing (AM) technology has been a breakthrough in the workpiece formation, such as selective laser melting (SLM). Besides, additive manufacturing is capable of producing complex metal compon...

Titanium Ti-6Al-4V has outstanding mechanical and chemical properties including high strength ratio, light weight, high melting point, and good corrosion resistance. However, this titanium alloy also has disadvantages, namely low hardness, high coefficient of friction, and poor wear resistance. One way to improve the properties of material is by he...

Nitrogen-dopped activated carbon was synthesized to see its effect on the characterization of the nitrogen surface functional groups, crystal size, and morphology of the resulting sample. Synthesis of nitrogen-doped activated carbon was carried out by varying the addition of Urea as a nitrogen doping source. Activated carbon compared its characteri...

This study aims to determine the magnetic properties and structural properties of zinc ferrite (ZnFe2O4) material with the sonochemichal synthesis method. The sonochemichal method was obtained by sonication lasting for 30 minutes with the addition of 100 ml of 10 M NaOH. ZnFe2O4 material was sintered with temperature variations of 950°C, 1050°C, an...

The heat exchanger is an example of heat transfer applications in industries that commonly found in cooling systems and powerplants. The heat exchangers utilise water, oil, and ethylene glycol (EG) as heat transfer fluids which possess a deficiency in heat transfer characteristics. Nanofluid are expected to improve the heat characteristics of the f...

DSFSW welding uses the rotating of a tool in the workpiece to create heat owing to friction between workpiece and tool to be connected. Corrosion is influenced by the presence of high heat owing to friction and a non-uniform cooling rate. The heat transforms the metal in the Heat Affected Zone (HAZ) and Weld Metal (WM) region, which can result in f...

Nanolubricant is a type of nano fluid that contains base-fluid lubricant (water or oil) and nanoparticles. This study aims to analyze the thermophysical and rheological properties of lubricants with the addition of nanoparticles. The nanoparticles used are Calcium Carbonate (CaCO3) made from scallop shell waste. The base lubricant is SAE 5W-30 synt...

This research uses SAE 5W-30 lubricant base material with the addition of Hexagonal Boron Nitride (hBN) nanoparticle additives. This study aims to analyze the thermophysical and rheological properties of lubricants with the addition of nanoparticles. The method in this study uses a two-step method where nanoparticles are first prepared separately,...

Supercapacitor, which is also known as ultracapacitor or electrochemical capacitor, has gained considerable interest due to their abrupt reload speed, high performance, lengthy cycle life, and low-cost maintenance. Meanwhile, NiCo 2 O 4 is understood as one of the promising supercapacitors as it offers high specific capacitance, excellent cyclic st...

Recent industrial developments have focused more and more on the applications of lightweight foamed concrete (LFC) in the construction industry, having advantages over normal-strength concrete. LFC, however, has several drawbacks including brittleness, high porosity, excessive drying shrinkage, rapid cracking, and low deformation resistance. Practi...

Friction Stir Welding (FSW) is a solid-state welding method that has diffusion and different metal structures can blend well. Friction stir welding (FSW) has a weakness, one of which is the lack of flexibility the welding process is only carried out on one side of the plate being welded, so it is not applied on thick materials. Double side friction...

This research was conducted to determine the corrosion rate by varying the concentration of the solution against hydrochloric acid and sulfuric acid. The method used is open circuit potential (OCP) and Tafel plot. Based on the research conducted, Hastelloy C-276 was more prone to get oxidized in sulfuric acid rather than hydrochloric acid. It can b...

The increasing demand for energy from fossil fuels and depleting reserves has made researchers look for efficient energy and guaranteed its availability. This paper intends to understand the effect of TiO2 nanoparticles on Tetraselmis chuii (T. chuii) microalgae combustion using a thermogravimetric (TG) analyzer. The kinetic parameters were analyze...