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All Journal Jurnal Spektran Jurnal Energi Dan Manufaktur Rekayasa Mesin Jurnal METTEK (Jurnal Ilmiah Nasional Dalam Bidang Ilmu Teknik Mesin) Jurnal Teknik Mesin R.E.M (Rekyasa Energi Manufaktur) Jurnal Dinamika Teknik Mesin : Jurnal Keilmuan dan Terapan Teknik Mesin Journal of Energy, Mechanical, Material and Manufacturing Engineering Indonesian Journal of Chemistry Machine : Jurnal Teknik Mesin Jurnal Agrotek UMMat Journal of Applied Agricultural Science and Technology Jurnal Pengabdian Magister Pendidikan IPA Jurnal Abdi Insani Jurnal Mesin Nusantara Journal of Fibers and Polymer Composites Jurnal Karya Pengabdian Teknik Mesin Protech Biosystems Journal Indonesian Journal of Forestry Research
Nasmi Herlina Sari
Jurusan Teknik Mesin, Fakultas Teknik Universitas Mataram
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Journal : Protech Biosystems Journal

 1 
Utilization of Pumpkin seed waste extract as an inhibitor in reducing the corrosion rate on metals Hidayatullah, Syarif; Sari, Nasmi Herlina; Huda, Ahmad Akromul; Pradityatama, Maharsa; Sinarep, Sinarep; suteja, suteja
Protech Biosystems Journal Vol 5, No 1 (2025): Protech Biosystem Journal
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/protech.v5i1.32116

Abstract

Our research focuses on enhancing the potential of pumpkin seed waste extract as a sustainable corrosion inhibitor for metal (Fe) in 1 M HCl solution. Phytochemical screening and antioxidant activity were identified. Various investigative methodologies including experimental techniques such as Potentiodynamic Polarization (PDP) were used to evaluate the effectiveness of these pumpkin seed waste extract inhibitors in inhibiting corrosion. Electrochemical results showed that the effectiveness of the inhibitor was concentration dependent here reaching 83.11% at 3000 g/L pumpkin seed waste extract inhibitor. The PDP showed that the mixed inhibition control effectively retarded the corrosion of the metal. Furthermore, the adsorption behavior of the pumpkin seed waste extract inhibitor onto the metal follows the Langmuir isotherm model with physisorption properties. The adsorption mechanism of the inhibitor on the metal surface successfully formed a protective film on the metal surface thereby reducing the corrosion rate.  
Characteristics Of Physical, Mechanical And Chemical Properties Of Cissus Sicyoides And Its Composites Apriandi, M. irawan; Sari, Nasmi Herlina; Sinarep, Sinarep
Protech Biosystems Journal Vol 5, No 1 (2025): Protech Biosystem Journal
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/protech.v5i1.32908

Abstract

This study aims to examine the characteristics of Cissus Sicyoides natural fibers extracted by two different methods, namely mechanical and boiling methods, and their application as reinforcing materials for epoxy resin-based composites. The characteristic of fibers was tested through physical and chemical properties, and fiber morphology, including tensile tests, FTIR, SEM and chemical composition. The results showed that the mechanical method produced fibers with higher tensile strength (431.41 MPa) and rougher surface structures, which support better mechanical bonding in the composite matrix. Meanwhile, the boiling method produced fibers with higher cellulose content (23.05%) and a cleaner and tidier surface. FTIR tests confirmed the presence of hydroxyl and carbonyl groups in both samples, while SEM results showed significant presence in the surface morphology and fiber cross-section. Composites made with fibers from the mechanical method had higher tensile strength (28.97 MPa) compared to composites from the boiling method (9.42 MPa). Overall, Cissus Sicyoides fiber has the potential as a composite reinforcing material with a mechanical extraction method that is superior in producing better mechanical performance. The findings of this study add to the use of local natural fibers as an alternative, ecologically friendly composite reinforcement for lightweight buildings.
Co-Authors Achmad - Zainuri Achmad Zainuri Achmad Zainuri Agil Trieanto Agus Dwi Catur Agus Dwi Catur Ahmad Safii Ahmad Syafruddin Zohri, Ahmad Ahmad Syafruddin Zohri, Ahmad Syafruddin Ahmad Taufan Ainun Asmawati Anindito Purnowidodo Anindya Aisyatur Amini Apriandi, M. Irawan Arif Mulyanto Arif Mulyanto, Arif Arif Surya Darmawan D.P Arif Surya Darmawan, Arif Surya Arya Muliana Baiq Elmaliana Baiq Tasya Carrisa Denda Ayu Febriani Riaz Putri Dewa Gede Pertama Putra Dewa Gede Pertama Putra, Dewa Gede Pertama Dhea Amalia Didit Yudhanto Difa Salsabila Fakhrunnisa Dimas Juniarto Dina Muliyani Djarot B. Darmadi, Djarot B. Dwi Setyawan Edi Syafri Emmy dyah S Emmy Dyah Sulistyawati, Emmy Dyah Emmy Dyah Sulistyowati Emmy Dyah Sulistyowati Emmy Dyah Sulistyowati Emmy Dyah Sulistyowati, Emmy Dyah Evelyn Carolina Sentosa Fitratul Wahyu, Fitratul Fitri Febrianti Fitriah H. Harsi, H. Herlinasari, Nasmi Hidayatulah, Syarif Huda, Ahmad Akromul Huriyani I Gede Widiartha I Gede Widiartha, I Gede I Gusti Bagus Indra Permana I Kade Wiratama I Made Wirawan I Putu Krishna Artha Sastra I Putu Krishna Artha Sastra, I Putu Krishna Artha I.D.K. Okariawan IDK Okariawan, IDK IGNK Yudhyadi IGNK. Yudhyadi Insan Andrian, Insan Jauhar Fajrin Jauhar Fajrin Jauhari Muslim, Jauhari Kadriyan, Hamsu Karyanik, Karyanik Khan, Moonish Ali Kiki Dewanti Lalu Abdurrahman Wahid Lalu Tumbuh Prasetya Lalu Wahyu Alam Ludia Margrith Suseray M. Wirya Dirjan M. Wirya Dirjan, M. Wirya Maharsa Pradityatama Maryam Soleha Bahar Muhammad Ali Azmi Muhammad Edi Nasution Muhammad Rama Setiyadi Muhammad Subbanul Mujahiddin Muhammad Zaidan Fadhlurrahman Rivlan N. Nurchayati Namira Risqi Putri Muquita Nur Kaliwantoro Nurhasanah Nurhasanah Nurrochman Hartadi Dasrien Pandri Pandiatmi Pandri Pandiatmi Panji Saputra Anggara Paryanto Dwi Setyawan Pnadri Pandiatmi, Pnadri R.C. Lelio Retno Setyowati, Ety Risa Wardani Rivlan, Muhammad Nabil Fadhlurrohman Rivlan, Muhammad Zaidan Fadhlurrohman Rozan Hermansyah Rudy Sutanto S Sinarep, S S Sujita, S S. Sinarep, S. Saiful Askar, Saiful Salman Salman Salman Sanjay Mavinkere Rangappa Sari, Suteja Sinarep Sinarep - Sinarep Sinarep Sinarep Sinarep Sinarep Sinarep Siti Zulaeha Sugiman Sugiman Sujita Sujita Sujita Sujita Sujita, Sujita Sukarne Sukarne Sutaryono, Yusuf Akhyar Suteja Suteja Suteja Suteja Suteja Suteja Suteja Suteja, Suteja Syafri, Edi Syahrul Syarif Hidayatullah Syharul Syahrul . T Topan, T T. Topan, T. Tawaqqal, Akbar Thiagamani, Senthil Muthu Kumar Thiagamani, Sentil Muthu Kumar Ulfa Handayani Wibi Wahid Muharram Yayan Gunanto Yayat Indra Saputra Yogi Prayudi Yudi Ahmad Efendi Yusuf Ahyar Sutaryono Yusuf Akhyar Sutaryono Zahratul Laili