Indonesia Conference Directory

Corresponding Author
Abdul Rajak

Institutions
a) Department of Physics, Faculty of Mathematics and Natural Sciences,
b) Research Center for Biosciences and Biotechnology, Institute for Research and Community Services,
Institut Teknologi Bandung
Jalan Ganesa 10, Bandung 40132, Indonesia
Corresponding authors:
*krijal[at]fi.itb.ac.id, **miftah[at]fi.itb.ac.id

Abstract
The expanded polystyrene (EPS) is one of polystyrene product, which is lightweight and has a a low density. EPS is widely used for packaging of various products such as electronics and foods products. Many industries use EPS because of its versatility, dimensional stability, cleanliness, and low cost. Unfortunately, the EPS waste are disposable, undegradable and environmentally harmful, which make the recycling of this waste is necessary. However, due to their very low density, the waste in bulk form is uneconomical to transport to the recycle facilities. One way to do to reduce the EPS waste volume is by dissolving them in solvent. An aromatic hydrocarbon, toluene, cyclic hydrocarbon and methylcyclohexan, such as d-limonene and dimethylformamide (DMF) are well-known EPS solvents to dissolve the EPS waste completely. However, each solvent dissolve the EPS differently because each solvent has difference boiling point and evaporation rate. In this study, we reported the difference of dissolution rate of EPS using d-limonene and DMF solvent, as well as their combination. The mass combination ratio of d-limonene and DMF were varied. The dissolution rate and the percentage of volume reduction from each variation were reported.

Keywords
Expanded polystyrene waste, dissolution rate

Topic
Synthesis and Characterization Techniques

Link: https://ifory.id/abstract/nyK9rGcfxW3A

Corresponding Author
Iswanti Sihaloho

Institutions
1Departement of Physics, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jalan Ganesa 10, Bandung 40132, Indonesia
2Research Center of Bioscience and Biotechnology, Institut Teknologi Bandung, Jalan Ganesa 10, Bandung 40132, Indonesia

Abstract
Air filter technology has been applied widely in various fields, e.g. industry, health, and environment. The performance of air filter is characterized by quality factor value which depends on the filtration pressure drop and efficiency. The pressure drop can be obtained by measuring the pressure different of both sides of the filter when the air is flown through it. The filtration efficiency can be measured by counting the number of particles before and after filtration. For this purpose, particles with known sizes are required to obtain the filtration efficiency curve as the function of particle size. Polystyrene latex (PSL) is monodisperse particle with perfect spherical shape. Their size uniformity is advantages for their application as the particle source for the air filter characterization. This paper discusses the air filter characterization using PSL particles with various sizes. The air filters in this study were polyacrylonitrile (PAN) nanofiber membranes, which were prepared by electrospinning technique. The thickness of the PAN membranes were varied by setting the electrospinning time. We also compared the filtration performance of the PAN membranes to the commercial filter. The filtration efficiency to particle diameter curve depicted the most penetrating particle size (MPPS) value of 294 nm.

Keywords
Air filter, Electrospinning, Nanofiber, Polystyrene, MPPS

Topic
Synthesis and Characterization Techniques

Link: https://ifory.id/abstract/GCcVPYFhqEmx

Corresponding Author
Maya Puspitasari Izaak

Institutions
(a) Dept. of Physics Education, University of Pelita Harapan Karawaci, Tangerang 15811, Indonesia
*maya.izaak[at]uph.edu
(b)Center for Science and Technology of Advanced Materials, BATAN, Tangerang Selatan 15314, Indonesia

Abstract
The optimal decomposition of ilmenite to obtain an increase in TiO2 levels has been successfully carried out through a multi-step hydrometallurgical process. The initial levels of ilmenite in the iron sand was obtained about 46.50%. The multi-step hydrometallurgical process was carried out in order to determine the efficiency of TiO2 extraction. The sediment, which is obtained by this process was characterized using XRD and SEM-EDS. The result of XRD analysis was obtained the percentage of TiO2 formed in the leaching stage 1 and 2, respectively 85.01% and 95.55%. Based on the result of SEM-EDS analysis, the morphological was heterogeneous with particle size about 180-300 nm. It was concluded, that a multi-step hydrometallurgical process can increase TiO2 levels quite high and the process efficiency was very good

Keywords
Ilmenite, hydrometallurgy, TiO2, increasing levels

Topic
Synthesis and Characterization Techniques

Link: https://ifory.id/abstract/M2WfjTDxAZ9k