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All Journal Jurnal Pendidikan Teknologi dan Kejuruan Kronologi
Amalia, Dinda Putri
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Education Engineering Social Sciences

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Anticorrosive Epoxy Coatings Enhanced with Rice Husk Derived-Graphene Amalia, Dinda Putri; Riastuti, Rini
Jurnal Pendidikan Teknologi Kejuruan Vol 5 No 2 (2022): Regular Issue
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jptk.v5i2.26823

Abstract

Coatings are the most common corrosion control practice. Therefore, it is very important to discover the most cost-effective and environmentally-friendly coating materials for sustainability. When dispersed in epoxy resin, graphene has barrier properties that improve the anticorrosive performance of the metal significantly. Graphene can be synthesized from agricultural waste. Herein, graphene derived from rice husk and epoxy resin was developed with solution mixing to prepare graphene-epoxy coating composites with enhanced anti-corrosive properties. X-ray diffraction, UV-vis spectroscopy, and scanning electron microscopy were used to characterize the synthesized graphenes. The anticorrosive properties of the coatings were characterized by potentiodynamic polarization and electrochemical impedance spectroscopy, which resulted in the corrosion resistance of synthesized graphene and commercial reduced graphene oxide being better than commercial graphene. The impedance and corrosion rate values of synthesized graphene are 1.77 x 105 Ω and 0.00011 mm/year.
Perjalanan Hidup dan Perkembangan Usaha Rumah Makan H. Rusdi Syafri Amalia, Dinda Putri; Fatimah, Siti
Jurnal Kronologi Vol 7 No 1 (2025): Jurnal Kronologi
Publisher : Jurusan Sejarah FIS UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jk.v7i1.861

Abstract

This research is a Thematic Biography that examines the life journey of H. Rusdi Syafri from dishwasher to restaurant entrepreneur. This study addresses two research questions: (1) What was H. Rusdi Syafri's life like before becoming an entrepreneur? and (2) How did his business develop from 1992-2024? The method used is historical research, which includes: (1) Heuristics for collecting primary data (interviews) and secondary data (observations and documents), (2) Source Criticism with external and internal criticism, (3) Interpretation of historical facts, and (4) Historiography for scientific writing. The results show that H. Rusdi Syafri, born on March 26, 1965, in Nagari Sumpur, began his career as a dishwasher after graduating from elementary school. In 1989, he opened a small restaurant named Fajar Baru, and in 1991, he founded Taman Selera Restaurant in Indramayu. Taman Selera grew rapidly, employing 300 employees, partnering with 10 bus operators, and serving around 40 buses daily. With an area of 4 hectares, Taman Selera became one of the largest restaurants in Indramayu. H. Rusdi Syafri's story inspires many through his contributions in creating jobs and helping the local community as well as his hometown of Nagari
Anticorrosive Epoxy Coatings Enhanced with Rice Husk Derived-Graphene Amalia, Dinda Putri; Riastuti, Rini
Jurnal Pendidikan Teknologi Kejuruan Vol 5 No 2 (2022): Regular Issue
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jptk.v5i2.26823

Abstract

Coatings are the most common corrosion control practice. Therefore, it is very important to discover the most cost-effective and environmentally-friendly coating materials for sustainability. When dispersed in epoxy resin, graphene has barrier properties that improve the anticorrosive performance of the metal significantly. Graphene can be synthesized from agricultural waste. Herein, graphene derived from rice husk and epoxy resin was developed with solution mixing to prepare graphene-epoxy coating composites with enhanced anti-corrosive properties. X-ray diffraction, UV-vis spectroscopy, and scanning electron microscopy were used to characterize the synthesized graphenes. The anticorrosive properties of the coatings were characterized by potentiodynamic polarization and electrochemical impedance spectroscopy, which resulted in the corrosion resistance of synthesized graphene and commercial reduced graphene oxide being better than commercial graphene. The impedance and corrosion rate values of synthesized graphene are 1.77 x 105 Ω and 0.00011 mm/year.
Co-Authors Rini Riastuti, Rini Siti Fatimah