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Pengaruh Penambahan Nanokatalis MnFe2O4 Terhadap Proses Pirolisis Sampah Plastik HDPE Wati, Rita Fajar; Wardana, ING; Winarto, Winarto; Sukarni, Sukarni; Puspitasari, Poppy
Jurnal Rekayasa Mesin Vol 9, No 3 (2018)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (177.71 KB) | DOI: 10.21776/ub.jrm.2018.009.03.9


The effects of MnFe2O4 nanocatalyst addition toward HDPE plastic waste pyrolysis have been investigated by performing experiments on METTLER TOLEDE TGA DSC1 Simultaneous Thermal Analyzer at heating rates of 10oC/min by nitrogen and temperatures range from room temperature to 1000oC. The results of pyrolysis showed that the main polymer components of HDPE plastic waste, both, with and without MnFe2O4 nanocatalyst addition degraded in one stage. The MnFe2O4 nanocatalyst addition increases the maximum mass loss rate of HDPE plastic waste pyrolysis, however, it increase the degradation of the initial temperature.
Analisis Sifat Fisik dan Kompresibilitas Nanopowder Zinc Oxide (ZnO) sebagai Alternatif Material Amalgam Qosim, Nanang; Murdanto, Putut; Puspitasari, Poppy
Jurnal Rekayasa Mesin Vol 9, No 1 (2018)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (449.208 KB) | DOI: 10.21776/ub.jrm.2018.009.01.2


Severe effects of the mercury use on health as an amalgam material have required an alternative material in order to eliminate it from amalgam composition. This research was conducted to analyze the physical properties and compressibility of ZnO nanopowder as an alternative amalgam material. The physical properties including morphology, dimensions, and the atomic ratio were analyzed by SEM, XRD-XRF and EDX. Further, the compressibility was conducted by using hydraulic press machine. The results showed that ZnO has particle size of 14.34 nm with morphology classified as nanorods. In the compressibility test, both the variation of compression loadings and holding time have brought an effect on the significant increase of ZnO nanopowder density.
Analysis of Hardness, Microstructure, Macrostructure, and Fluidity of Al-Si with Eggshell Variation as Binder in Sand Casting Fitriyanto, Retnaldi; Puspitasari, Poppy; Murdanto, Putut
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 2, No 2 (2018)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (40.356 KB) | DOI: 10.17977/um016v2i22018p050


Metal casting process can be described as the process of making object by melting metal then poured into the desired mould. The mould that is commonly used is sand moulding. Binder which commonly used in sand casting process is bentonite. Bentonite is kind of mineral which can be run out if it is used continuously. The background of this study was to analyse the other binder that could reduce the use of bentonite by utilizing eggshell. This study aimed to analyse the hardness, microstructure, macrostructure, and fluidity of the cast which yielded by using variations of eggshell. The method that used was experimental method with a model of one-shot case study with descriptive analysis. The study result showed that the highest value of fluidity test was found at variation of 7% eggshell and 3% bentonite with hardness value of 180.86 HV. There were found several defects, casting result with variation of 4% eggshell and 3% bentonite found that there were ± 28 pinhole defects and ± 20 open grain defects. There were found ± 65 pinhole defects and ± 30 open grain structure defects in the casting result with variation 7% eggshell and 3% bentonite. The casting result with variation 10% eggshell and 3% bentonite had ± 50 pinhole defects and ± 30 open grain structure defects.
THE EFFECTS OF r-HDPE/r-PP FORMULATION RATIO INTO MECHANICAL, THERMAL AND MORPHOLOGICAL BEHAVIOR OF r-HDPE/r-PP POLYMERIC BLENDS Razak, Jeefferie Bin; Wahid, Siti Zaleha; Mohamad, Noraiham; Puspitasari, Poppy; Jaafar, Rosidah; Tutuko, Pindo
Journal of Engineering and Management in Industrial System Vol 8, No 2 (2020)
Publisher : Badan Penerbit Jurnal, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jemis.2020.008.02.1


This study has reported the effects of different formulation ratio between recycled high density polyethylene (r-HDPE) and recycled polypropylene (r-PP) into the resulted mechanical, thermal and morphological properties of r-HDPE/r-PP polymeric blends. About five (5) different formulation ratio of r-HDPE/r-PP have been prepared and tested. The best combination ratio between r-HDPE and r-PP was determined in this work. It was found that the 70/30 wt.% of r-HDPE/r-PP blend possessed an outstanding mechanical and physical strength. About 59.80% and 2.30% of positive improvement in comparison to 0/100 wt.% of r-HDPE/r-PP was achieved for both of tensile strength and hardness, respectively. Interestingly, for 70/30 wt.% of r-HDPE/r-PP blend had also experienced major increased in their elongation at break up to 473%. The fracture morphological behavior of the tested samples that were observed via SEM observation, had established the interaction between the structure and properties of produced r-HDPE/r-PP blends, especially on the miscibility state between the r-HDPE and r-PP phases. Thermal evaluation by using the DSC had confirmed the partial miscibility state due to dominant peak shifting at 120 - 140°C and obvious melting peak reduction pattern. Overall, from this study, it was found that the blending between r-HDPE and r-PP into r-HDPE/r-PP blends are feasible to improve the properties of primary phase.
Pengenalan Teknologi Augmented Reality sebagai Media Pembelajaran Anak Usia Dini di RA Babul Ulum Desa Pulau Panggung Kecamatan Abung Tinggi Kabupaten Lampung Utara Puspitasari, Poppy; Ayu Permanasari, Avita; Sukarni, Sukarni
Jurnal Komunitas : Jurnal Pengabdian kepada Masyarakat Vol 4, No 1: Juli 2021
Publisher : Institut Ilmu Sosial dan Manajemen Stiami

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31334/jks.v4i1.1626


In this millennial era, there are many school institutions that use modern technology in carrying out learning, to support and make learning more interesting. One example of modern technology that can be used is Augmented Reality technology. Unfortunately the use of Augmented Reality technology is not as easy as imagined, because there are obstacles such as the lack of teacher education about various learning media that support the learning process and also especially on the location factor of RA Babul Ulum which is in rural areas so that it has not been touched by learning media that smells technology. To support learning using the AR system at RA Babul Ulum, Pulau Panggung village, North Lampung, a community grant team from the State University of Malang funded by PNBP carried out a community service program in the form of counseling and providing teaching aids in the form of an LCD projector and also several Augmented Reality (AR) cards.). With the methods of observation, lectures, demonstrations, discussions and practice with direct trials resulted in: teachers RA Babul Ulum understand and master the application of Augmented Reality technology; RA Babul Ulum received new teaching materials in the form of Augmented Reality cards; The use of this learning media causes students to understand better and not get bored easily when the learning process takes place.