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All Journal Science and Technology Indonesia Journal of Science and Applicative Technology Indonesian Mining Journal Jurnal Ilmu Fisika Jurnal Teori dan Aplikasi Fisika JURNAL PERMADI: PERANCANGAN, MANUFAKTUR, MATERIAL DAN ENERGI Logic : Jurnal Rancang Bangun Dan Teknologi Indonesian Mining Journal
Sipahutar, Wahyu Solafide
Program Studi Teknik Material, Institut Teknologi Sumatera, Lampung Selatan 35365, Indonesia
Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Earth & Planetary Sciences Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics

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Journal : Journal of Science and Applicative Technology

 1 
Evaluation of surface properties of betung bamboo (Dendrocalmus asper) strands under various heat treatment duration and temperature Risa Nurin Baiti; Sena Maulana; Wahyu Solafide Sipahutar; Rio Ardiansyah Murda; Fajar Aditya Julyatmojo; Astri Aulia Suwanda; Muhammad Saeful Fadlan
Journal of Science and Applicative Technology Vol 5 No 2 (2021): Journal of Science and Applicative Technology December Chapter
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM), Institut Teknologi Sumatera, Lampung Selatan, Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35472/jsat.v5i2.457

Abstract

The abundance, rapid growth characteristics and good mechanical properties have made betung bamboo as good alternative materials to replace the slow growing wood. To adress the susceptibility to insects and water attack, the making of bamboo composites, using resin as matrix, has been widely practiced. Thus, the surface properties of bamboo strands are crucial to determine the optimum interaction with resin. This study evaluate the effect of heat treatment to improve the surface properties of bamboo strands, such as the wettability and the color change. Beforehand, the freshly cut bamboo was cut, cleaned and sand-grinded. The heat treatment was done at 140o and 160oC for 1, 2, and 3 hours. After cooling down to room temperature, the contact angle of bamboo’s surface was measured by sessile drop methode. The wettability was indicated by constant of contact angle change rate, K. Besides, the change of color was also determined. After the experiments, it was obtained that the bamboo surface tends to be more hydrophobic and has darker color with longer duration of heat treatment. Higher temperature and longer duration of heat treatment can cause more evaporation of liquid inside bamboo and decrease hydrophilicity of the surface.
Analisis Sifat Mekanik dari Struktur Seluler yang Difabrikasi dengan Printer 3D Abdul Muhyi; Riyan Ferdiyanto; Kardo Rajagukguk; Wahyu S. Sipahutar; Muhamad Fatikul Arif
Journal of Science and Applicative Technology Vol 7 No 1 (2023): Journal of Science and Applicative Technology June Chapter
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM), Institut Teknologi Sumatera, Lampung Selatan, Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35472/jsat.v7i1.370

Abstract

Struktur ringan berbentuk cellular (seluler) atau foam (busa) dalam beberapa tahun terakhir sangat banyak dikembangkan terutama karena perkembangan cepat dari Printer 3D, sehingga desain rumit dapat difabrikasi dengan mudah. Struktur seluler mempunyai rasio kekuatan terhadap massa dan kekakuan yang tinggi, serta dapat diaplikasikan pada struktur ringan dengan ketahanan impak yang tinggi. Dalam tulisan ini, dilakukan uji tekan terhadap enam jenis struktur seluler dengan fraksi volume 10%. Jenis struktur seluler yang divariasikan adalah Cubic, Gyroid, Honeycomb 3D, Rectilinear, Honeycomb, dan Rectilinear 45o. Hasil yang didapat menunjukkan bahwa struktur kompleks jenis Cubic mempunyai kekuatan maksimal terbaik dan juga mempunyai penyerapan energi yang terbaik berdasarkan pengujian yang dilakukan, diikuti dengan struktur Gyroid dan Honeycomb 3D. Struktur yang mempunyai topologi dua dimensi yaitu, Rectilinear 0o, Rectilinear 45o, dan Honeycomb tidak mempunyai kekuatan dan karakteristik penyerapan energi yang baik. Hasil ini dapat digunakan sebagai panduan desain struktur ringan yang mempunyai karakteristik kekuatan dan penyerapan energi mekanik yang tinggi.
Co-Authors Abdul Muhyi Anisa Fitri Anisa Fitri Anrokhi, Mohamad Samsul Astri Aulia Suwanda Azwar Manaf Bahfie, Fathan Diah Susanti Eka Nurfani Erik Prasetyo Fahmi, Achmad Gus Fajar Aditya Julyatmojo Fajar Nurjaman Farhan, Abi Hadi Teguh Yudistira, Hadi Teguh Hafid, Muhamad Haloho, Trivendi Hanifah, Istiara Rizqillah Kardo Rajagukguk, Kardo Muhamad Fatikul Arif Muhammad Saeful Fadlan Muhammad Yasin Siregar Muljadi Muljadi Okky Fajar Tri Maryana Pasaribu, Joshua Leonardo Phasa, Agita Prakoso, Ahmad Andryan Prasetya, Bayu Putra, Oji Kuncoro Darma Putri, Faiza Armalia Putrie, Gustya Salma Rianjanu, Aditya Rio Ardiansyah Murda Risa Nurin Baiti Riyan Ferdiyanto Sena Maulana Tarmizi Taher Widi Astuti William Wiliiam