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All Journal Rekayasa Mesin JST ( Jurnal Sains Terapan ) Jurnal Teknik Indonesian Physical Review Specta Journal of Technology Indonesian Applied Physics Letters PIKAT
Tajalla, Gusti Umindya Nur
Institut Teknologi Kalimantan
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences Other

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Journal : Specta Journal of Technology

 1 
Characterization of Bark-Midrib Fibers using Chemical Treatment Variations as Reinforcement in Bark-Midrib Fiber Composites Oliever Andrea Parusha; Muhammad Nurhidayatur Rozikin; Andromeda Dwi Laksono; Gusti Umindya Nur Tajalla; Nabilla Amalia Putri; Fitriana Maharani Fatchur Rochim
SPECTA Journal of Technology Vol. 3 No. 2 (2019): SPECTA Journal of Technology
Publisher : LPPM ITK

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (736.424 KB) | DOI: 10.35718/specta.v3i2.154

Abstract

Bark midrib are not fully utilized. Utilize the characterization of the fiber and process it into polymer composites with natural fiber reinforcement. The study was conducted using a variety of chemical treatments in the form of bark midribs without treatment, delignification treatment that is immersion using NaOH media concentration of 1%, 5%, 10% with 3 hours immersion time and bleaching treatment using H2O2 media 2% concentration with immersion time 30, 60 and 90 minutes. In obtaining suitable properties, tensile tests, impact tests, Scanning Electron Microscopy (SEM) images, and Fourier-Transform Infra-Red (FTIR) tests are performed. Optimal delignification treatment at 5% NaOH concentration with a tensile test value of 25.47 MPa (increasing 76.86%) and an impact test value of 11.95 kJ/m2 (increasing 11.45%). The optimal bleaching treatment at 90 minutes immersion with a tensile test value of 35.09 MPa (increased 36.36%) and impact test value of 13.77 kJ/m2 (increased 15.22%). The results of SEM images show that the bark midrib fiber composite without treatment has a lousy interface, delignification treatment with a reasonable good interface, and bleaching treatment with an excellent interface. FTIR test results showed that the bark midrib fiber composite without treatment had a cellulose component but hemicellulose and lignin levels still dominated. Based on the results of the study, bark midrib fiber with delignification chemical treatment using 5% NaOH for 3 hours followed by bleaching treatment using 2% H2O2 for 90 minutes is the treatment with the best results and then applied to a natural fiber composite product.
Penambahan Ekstrak Ranting Karamunting (Rhodomyrtus Temenosa) Sebagai Inhibitor Alami Pada Baja AISI 1040 Yanti, Lisda; Darma, Daffa Irsyad; Rifani, Muhammad; Tajalla, Gusti Umindya Nur; Awali, Jatmoko; Mohd, Yusairie; Triana, Yunita
SPECTA Journal of Technology Vol. 7 No. 2 (2023): SPECTA Journal of Technology
Publisher : LPPM ITK

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/specta.v7i2.925

Abstract

  In this study, Karamunting twig extract (Rhodomystus tementosa) was used as a natural inhibitor on AISI 1040 steel. Based on the results of functional group analysis, it was confirmed that the compounds found in Karamunting twig extract are tannins and flavonoids. Electrochemical analysis using the potentiodynamic method showed the lowest corrosion rate at 300 ppm inhibitor concentration, with a corrosion rate of 2.881 mm/yr with an inhibition efficiency of 76.732%. Furthermore, the EIS test showed the highest inhibition efficiency at a concentration of 300 ppm, with a value of 66.720%.
Co-Authors Ade Wahyu Yusariarta Ade Wahyu Yusariarta Putra Parmita Ainun Zulfikar Andriansyah, Prisky Budi Prayitno Darma, Daffa Irsyad Dewi, Asti Lolita Dini Indrawati Fitriana Maharani Fatchur Rochim Idhil Ismail, Andi Jatmoko Awali Jatmoko Awali Kartika, Siska Ayu Laksono, Andromeda Dwi Mahera, Adinda Kholif Meutya Dwi Leoriza Mohd, Yusairie Muhammad Nurhidayatur Rozikin Muhammad Rifani, Muhammad Musyarofah Musyarofah, Musyarofah Nabilla Amalia Putri Nafisah, Azmia Rizka Norhidayah, Siti Oliever Andrea Parusha Putra, Ade Wahyu Yusariarta Riyadi, Ilham Tri Sabrina Humaira Tanjung, Rifqi Aulia Vadila, Mei Lisa Nur Winardi Dian Wahyu Pratama Yanti, Lisda Yunita Triana Yunita Triana, Yunita