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Studi Pengaruh Suhu Pemrosesan Terhadap Kekuatan Tarik Bioplastik PLA (Polylactic Acid) dan Tepung Kulit Singkong Ashrori, Moch. Kharis; Puspitasari, Dewi; Ganda, Andita Nataria Fitri
Jurnal Rekayasa Mesin Vol 11 No 01 (2026): JRM April 2026 (In Press)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jrm.v11i01.74903

Abstract

Conventional plastics are widely used due to their good mechanical properties; however, they pose serious environmental problems because they are difficult to degrade naturally. Therefore, bioplastics based on renewable resources, such as Polylactic Acid (PLA) reinforced with cassava peel flour as a natural filler, have been developed as an environmentally friendly alternative. This study aimed to analyze the effect of processing temperature variations on the mechanical properties and biodegradation rate of PLA–cassava peel flour bioplastics. An experimental method was employed with processing temperatures of 200 °C, 225 °C, and 250 °C. The material composition consisted of 70 wt% PLA and 30 wt% cassava peel flour, which was processed using injection molding through the melt intercalation technique. Tensile test specimens were prepared according to ASTM D638 Type I standards. Mechanical characterization was conducted using a Universal Testing Machine (UTM), while biodegradation behavior was evaluated using the soil burial test for four weeks. The results showed that a processing temperature of 225 °C produced the highest tensile strength of approximately 67 MPa. Increasing the temperature to 250 °C resulted in a decrease in tensile strength and elongation due to thermal degradation, although the elastic modulus and biodegradation rate increased. These findings indicate that processing temperature plays a crucial role in controlling the relationship between processing conditions, material structure, and mechanical properties of PLA–cassava peel flour bioplastic. Keywords: Bioplastic, Polylactic Acid, Cassava Peel Flour, Processing Temperature, Tensile Properties.
Rancang Bangun Mesin Uji Abrasi Material Alumunium Terhadap Pelumasan Oli Eko Saputra, Aditiya Wahyu; Wulandari, Diah; Sakti, Arya Mahendra; Puspitasari, Dewi
Jurnal Rekayasa Mesin Vol 11 No 01 (2026): JRM April 2026 (In Press)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Abrasion is a common wear mechanism that occurs in machine components due to repeated frictional contact, particularly in aluminum materials that are widely used because of their light weight and corrosion resistance. Nevertheless, aluminum remains susceptible to wear when the lubrication system does not perform optimally. This study aims to design and develop a laboratory-scale abrasion testing machine and to analyze the effect of rotational speed on the wear behavior of aluminum 6061 under oil lubrication. The research employed a research and development method consisting of design, fabrication, assembly, functional testing, and abrasion testing stages. Abrasion tests were conducted at rotational speeds of 500, 1000, and 1500 RPM with a constant load of 3 kg, a test duration of 30 minutes, and Shell SAE 10W-30 oil as the lubricant. Quantitative data were obtained from the measurement of specimen mass loss before and after testing, while qualitative analysis focused on machine performance and operational stability during testing. The results indicate that the developed abrasion testing machine operated properly and was capable of producing consistent wear data. The mass loss of aluminum specimens increased with higher rotational speeds, with the highest average wear observed at 1500 RPM. This study contributes by providing a simple and cost-effective abrasion testing machine for laboratory applications and by offering insights into the influence of rotational speed on the wear behavior of aluminum under lubricated conditions.
Co-Authors . Misbakhudin . Nalim Abdul Aziz Abdul Muis Abdul Rosyid, Ocid Abdullah, Andi Aziz Abdulloh, Isa Yuanata Achmad, Fendi Afero Pranesti, Dennova Agnes Widyaningrum Agustina, Sri Mumaeni Ahmad Luqman Hakim Aji Nugroho Akmal Hidayat Alfan Arfian Ambarita, Gilbert Doni Amirah Mustarin Amsal, Andi Yasir Amy Nindia Carabelly Andi Sukainah Andita Nataria Fitri Ganda Andung Dwi Haryanto Aneka Firdaus Anitasari, Fariska Dyanis Annisa Rahmawati Anto Budi Listyawan Aprilia, Rizky Wulan Apriliyawan, Beni Arifin Arifin Arifin, Rahmad Ariska, Ria Arlando, Choga Ilham Arya Mahendra Sakti Aryanto, Zaki Yuli Aryanto Asgaf, Khalifah Ashrori, Moch. Kharis Aspriyanto, Didit Astuti - Aswar Aswar Aswar Asyhar, Achmad Hanif At-Thoyyar, Aila Aulia Azahro , Fany Aulia, Noor Rizki Ayu Soraya, Imelia Ayu, Shinta Arini Bagus Afandi, Muhamad Bambang Sutopo Barlin Barlin Budiningtyas, Dwi Putri Chadijah, Andi Chusna Maulida Damayanti, Wulan Davareza, Tinton Debby Saputera, Debby Diah Kusuma Pratiwi Diah Savitri Ernawati Diah Wulandari Diana Wibowo Diapati, Siti Maifa Didid Diapari Diniyati, Lena Sri Diyahwati, Diyahwati Dyah Riandadari Dzimar, Muhammad Efendi, Ibnu Mirza Eka Marthanty Indah Lestari Eka Marthanty Indah Lestari, Eka Marthanty Indah Eka Utami, Nurhabibah Paramitha Eko Saputra, Aditiya Wahyu ELAH, ELAH Ellyanie Ellyanie Ellyza Herda Emalia, Lilis Eva Tuckyta Sari Sujatna Fachriani, Fachriani Fauzatinnisa, Amirah Ferly Isnomo Abdi Firdaus, I Wayan Arya Krishnawan Firiski, Edwi Febrian Firman Yasa Utama Firza, Firza ichmamudin sarfani Fitri Ganda, Andita Nataria Freddy, Antonius Ganda, Andita Ganda, Andita Nataria Fitir Ganda, Andita Nataria Fitri Ginta, Turnad Lenggo Gunawan Gunawan Gustini, Gustini Haedar, Ali Halim, Muhammad Bhilal Hardiyati*, Iin Hasan Basri Hayati, Auliya Aenul Hendri Chandra Hendry Hidalgo, Andres Migael Hilmansyah, Wisnu Husda, Baso Riadi Hutabarat, Zuhri Hutabarat Hutabarat, Zuhri Saputra Hutapea, Felix Theo Yusama Ichrom Nahzi, Muhammad Yanuar IKA SARI RAKHMAWATI, NUR Imowanto, Yuddy Inayah, Faidhul Indah Lestari, Eka Marthanti Indarto Indarto Indri Erwhani Indrowaty, Sri Aju - Irsyadi Yani Ismail Thamrin Ismawati, Sekar Ismi Prihandari Isriani Hardini Izzatus Tsamroh, Dewi Jannah, Azzukhrufia Jayadilaga, Yadi Judijanto, Loso Juliandhika, Muhammad Wahyu Jusmiati Jusmiati Kartika Sari Wijayaningsih Karyono Karyono Kasamira Dewi Abrori, Rafila Khaeruddin, Rizky Khairima, Amina Khairina, Niketa Khasani Khasani Khoerunnisa, Sabina Komariyah, Nor Laeli Lahming Lathiif, Abdul Lesmana, Nadella Leuhery, Ferdy Lia Amelia Lukman, Andi Maharani Laillyza Apriasari Maisaroh Maisaroh Manggala, Exgha Dwi Putra Manggalasari, Lena Citra Marlena Martini, Titin MARWANI Marwani Marwani, Marwani Maulana, Adimashqi Maulida, Husna Meliyana R, Sitti Masyitah Mihrani , Mihrani Mohamad Ikbal Riski Danial Mohd-Said, Shahida Muhammad Ainur Rosiqin, Muhammad Muhammad Junda Muhammad Mukhid Almudakir Muhammad Shulthoni Muhlis Muhlis Mukaromah, Nisaul Mustapha, Mazli Mutammam Nadhdhif Fikri Ferdiansyah Nadhifah, Umi Nada Nadya Inda Syartanti Najah, Syafinatunnajah Namira Aghnina, A.M. Della Nasrul, Nasrulloh Ibrahim Nataria Fitri Ganda, Andita Nazarudin, Fauzan Nazilah, Rohmatun Nikijuluw, Renata C.G.V Norma Nofianto Novanta, Nabella Maharani Novita Sari Nugroho, Bakti Adi Nur Insana Salam Nur Khasanah Nur Khasanah Nur Rahmah Nurhaliza, Diana Putri Nurmila, Nurmila Ocid Abdul Rosyid Octaviana, Inggil Tiara Oppusunggu, Romiana Pamenang, Ferli Rycarhana Prabowo, Janu Prakoso, Akbar Teguh Puji Astuti, Febru Purnomo Purnomo Raharti, Rini rahayu, eka puji Rahma, Nur Rahmah, Rayinda Eva Rahmah, Riezki Amalia Rahmania Pamungkas, Rahmania Rahmi Rahmi Ramadhani A, Gilang Ramli, Hartini Ramos Somya Ratnawati Ratnawati Razibi, Nor Diane Reni Fatmasari Syafruddin, Reni Fatmasari Restiana, Evi Retno Dewi Ambarastuti Retno Pudji Rahayu Rhesa, Muhammad Riezky Maya Probosari Riman Sipahutar Riskiana * Ristiana, Evi Rosyid, Ocid Abdul Rr. Poppy Puspitasari Saelan, Saelan Saldina, Iswatul Saleh, Andi Rahmat Salsabila Karno, Dhya Aurellia Salu Padang, Nely Saputra, M. A. Ade Saputra, M.A. Ade Saripah, Ai Setia Asyanti Setianingsih, Endang Setyaningrum, Novi Ayu Sherli Diana Sitepu, Alexander Sri Damayanti Sri Hartati Sri Wahyuni Sudarmanto Jayanegara Sukhemi Sukhemi, Sukhemi Sulistyorini, Elisa sultan Sultan Sultan Sunyoto Sunyoto Suryandari, Dewi Syahrina, Fitri Tedjohartoko, Andrew Tjakradidjaja, Anita S Tjakradidjaja, Anita S Triyuliarto, Dwiwardoyo Ulfa, Faiza Ulfah, Mulia Ulum, Diah Ariibatul Utama Putra, Risky Utami, Juliyatin Putri Utami, Nurhabibah Paramitha Eka Wahyono, Edi Wahyudi, Maman Diki Wahyuni, Titis Wardhana, Agung Satria Wardhani, Rr Arsyita Sri Widoretno, Yustin Setiya Wijaya, Nieke Andina Wildan Mufti Wirdana Wirdateti Wirdateti, Wirdateti Wiwik Handayani Wulandari, Taurina Ayu Yanto, Subari Yuda, Mohammad Wira Yulendasari, Rika Yulia Resti Yunian, AA Yusrinie Wasiaturrahmah Yustinasani, Katriana Zahra, Syafhika Rosilatu Zulkarnain Zulkarnain