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All Journal Jurnal Spektran Jurnal Energi Dan Manufaktur SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin 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 SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Journal of Applied Agricultural Science and Technology Jurnal Pengabdian Magister Pendidikan IPA Jurnal Abdi Insani Jurnal Mesin Nusantara Mechanical Engineering for Society and Industry Jurnal Agro Dedikasi Masyarakat (JADM) Journal of Fibers and Polymer Composites Jurnal Karya Pengabdian Teknik Mesin Protech Biosystems Journal Indonesian Journal of Forestry Research
Nasmi Herlina Sari
Department Of Mechanical Engineering, Universitas Mataram, Mataram 83125, Indonesia
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Transportation Other

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Utilization of Pumpkin seed waste extract as an inhibitor in reducing the corrosion rate on metals Syarif Hidayatullah; Nasmi Herlina Sari; Ahmad Akromul Huda; Maharsa Pradityatama; 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 M. irawan Apriandi; Nasmi Herlina Sari; 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.
Characteristics of Holocellulose Isolated from Waru Bark Fibers as Biopackaging Materials Suteja Suteja; Syarif Hidayatullah; Nasmi Herlina Sari; Maharsa Pradityatama
SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Vol. 19 No. 2 (2025): SINTEK JURNAL
Publisher : Faculty of Engineering, Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/sintek.19.2.132-143

Abstract

Holocellulose isolated from waru bark fiber (HCT) holds significant potential as a sustainable material for packaging applications in the food, pharmaceutical, and agricultural industries. Understanding its characteristics is crucial for optimizing chemical and mechanical treatments to enhance performance. This study isolated holocellulose from waru bark fibers via sequential hydrothermal alkaline (5% NaOH) and acid-bleaching (NaClO₂-CH₃COOH) treatments at 60°C. The raw fibers (RW-HCT) and treated holocellulose (TR-HCT) were characterized using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and thermogravimetric analysis (TGA). FTIR analysis confirmed the effective removal of lignin and hemicellulose components in TR-HCT, evidenced by the disappearance of peaks at 1735.29 cm⁻¹ (C=O stretching) and 1327.68 cm⁻¹ (C–O in lignin). XRD results showed that the crystallinity index increased from 62.29% ± 3.47 (RW-HCT) to 77.41% ± 5.26 (TR-HCT). SEM micrographs revealed a rougher, cleaner fiber surface in TR-HCT due to the removal of non-cellulosic impurities. TGA demonstrated improved thermal stability of TR-HCT, with a higher residual mass (1.01%) compared to RW-HCT (−6.43%). The findings indicate that holocellulose from waru bark fibers is a promising, eco-friendly reinforcement material for developing biodegradable packaging composites.
Characteristics of bio-composites from Polyvinyl alcohol reinforced micro-cellulose fibers of Paederia foetida Nasmi Herlina Sari; Muhammad Nabil Fadhlurrohman Rivlan; Suteja Suteja; Syarif Hidayatullah; I Putu Lokantara
Journal of Fibers and Polymer Composites Vol. 5 No. 1 (2026): Journal of Fibers and Polymer Composites
Publisher : Green Engineering Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55043/jfpc.v5i1.576

Abstract

The use of renewable natural fibers as reinforcements in biodegradable matrices has been boosted by the development of sustainable polymer materials. The purpose of this work is to examine the properties of bio-composites made of polyvinyl alcohol (PVA) reinforced with micro-cellulose fibers that are isolated from the underused plant resource Paederia foetida (MSPf). After retting and alkaline and bleaching treatments, micro-cellulose was obtained and added to PVA at a weight percentage of 5% utilizing the solution casting technique. The biocomposites' mechanical, thermal, water absorption, and morphological characteristics were assessed. When MSPf was added, PVA's tensile strength rose from 20.69 MPa to 23.10 MPa, and its elastic modulus increased dramatically, suggesting better stiffness and efficient stress transfer. The improvement is ascribed to the hydroxyl groups of PVA and cellulose having strong hydrogen bonds and good interfacial adhesion. Due to limited polymer chain mobility, elongation at break decreased, but the composite showed better structural integrity. After 36 h, water absorption attained an equilibrium value of 1.461%, indicating the creation of a compact fiber-matrix network. When compared to clean PVA, thermogravimetric analysis showed better thermal stability, and SEM verified strong interfacial compatibility and homogeneous dispersion. These results show that micro-cellulose derived from Paederia foetida is a viable sustainable reinforcement that can improve the performance of bio-composites based on PVA.
The Next Generation of Sustainable Composites: From High Performance to High Impact Nasmi Herlina Sari; Muhammad Nabil Fadhlurrohman Rivlan; Edi Syafri
Journal of Fibers and Polymer Composites Vol. 5 No. 2 (2026): Journal of Fibers and Polymer Composites
Publisher : Green Engineering Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55043/jfpc.v5i2.710

Abstract

Editor's Corner
Characterization of alkali-activated chrysopogon zizanioides natural fibers as reinforcement for energy-efficient biocomposite applications Sari, Nasmi Herlina; Sujita, Sujita; Syafri, Edi; Suteja, Suteja
Mechanical Engineering for Society and Industry Vol. 5 No. 2 (2025)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/mesi.14133

Abstract

This study examines the characteristics of alkali-activated Chrysopogon zizanioides natural fibers (CZFs) to determine their applicability as reinforcements in energy-efficient biocomposite applications. Unlike earlier research, which has mostly focused on conventional natural fibers, this paper proposes CZFs as a fresh, sustainable reinforcing possibility. The study investigates the impact of different levels of NaOH (1%, 3%, and 5%) on fiber structure and functionality, offering new insights into optimizing alkali activation for improved interfacial bonding and strength in biocomposites. The results show that alkaline treatment significantly influenced the structural and functional properties of the fibers. X-ray diffraction (XRD) analysis revealed an increase in crystallinity index from 36.17% in untreated fibers to 65.74% in those treated with 5% NaOH, indicating significant removal of amorphous components. FTIR spectra confirmed the reduction of non-cellulosic functional groups, while TGA/DTA analysis demonstrated improved thermal resistance, with a maximum char residue of 4.46% at 600 °C. Mechanical tests showed tensile strength increased from 252 ± 25 MPa to 553 ± 26 MPa and elongation from 4.1% to 5.8%, while SEM analysis revealed cleaner, rougher surfaces that promote fiber–matrix bonding. Additionally, fiber density rose from from 410 ± 20 to 980 ± 20 Kg/m³, and moisture content declined from 8.9% to 5.3%, reflecting improved dimensional stability. Among all treatments, the 5% NaOH-treated fibers offered the most optimal combination of structural, thermal, and interfacial performance. These results indicate that alkali-modified CZFs are promising candidates for use in energy-efficient biocomposites, particularly for lightweight structural components, automotive panels, and sustainable packaging requiring thermal durability and high stiffness.
Co-Authors Achmad - Zainuri Achmad Zainuri Achmad Zainuri Achmad Zainuri Agil Trieanto Agus Dwi Catur Agus Dwi Catur Ahmad Akromul Huda Ahmad Akromul Huda Ahmad Ilyas Rushdan Ahmad Safii Ahmad Syafruddin Zohri, Ahmad Ahmad Syafruddin Zohri, Ahmad Syafruddin Ahmad Taufan Ainun Asmawati Anindito Purnowidodo Anindya Aisyatur Amini Arif Mulyanto Arif Mulyanto, Arif Arif Surya Darmawan D.P Arif Surya Darmawan, Arif Surya Arya Muliana Baiq Elmaliana Baiq Tasya Carrisa Catalin Iulian Pruncu Dahlanuddin 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 Edi Syafri Emmy dyah S Emmy Dyah Sulistiowaati 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 Gunawan Refiadi H. Harsi, H. Harjono 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 Suartika I Made Wirawan I Putu Krishna Artha Sastra I Putu Krishna Artha Sastra, I Putu Krishna Artha I Putu Lokantara I.D.K. Okariawan Ida Bagus Alit IDK Okariawan, IDK IGNK Yudhyadi IGNK. Yudhyadi Insan Andrian, Insan Jamaluddin Jamaluddin Jauhar Fajrin Jauhar Fajrin Jauhari Muslim, Jauhari Joni Iskandar Kadriyan, Hamsu Karyanik, Karyanik Khan, Moonish Ali Kiki Dewanti Lalu Abdurrahman Wahid Lalu Tumbuh Prasetya Lalu Wahyu Alam Ludia Margrith Suseray M. irawan Apriandi M. Wirya Dirjan M. Wirya Dirjan, M. Wirya Maharsa Pradityatama Mardiansyah Maryam Soleha Bahar Muhammad Ali Azmi Muhammad Edi Nasution Muhammad Nabil Fadhlurrohman Rivlan Muhammad Nabil Fadhlurrohman Rivlan Muhammad Rama Setiyadi Muhammad Subbanul Mujahiddin Muhammad Zaidan Fadhlurrahman Rivlan Muji Setiyo N. Nurchayati Namira Risqi Putri Muquita Nur Kaliwantoro Nurhasanah Nurhasanah Nurpatria Nurpatria Nurrochman Hartadi Dasrien Pandri Pandiatmi Pandri Pandiatmi Panji Saputra Anggara Paryanto Dwi Setyawan Pnadri Pandiatmi, Pnadri Putu Lokantara R.C. Lelio Ragil Widyorini 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 Salman Salman Salman Salman Salman Sanjay Mavinkere Rangappa Sari, Suteja Senthil Muthu Kumar Thiagamani Sinarep Sinarep - Sinarep Sinarep Sinarep Sinarep Sinarep Sinarep Sinarep Sinarep Sinarep Sinarep Siti Zulaeha Sugiman . Sujita Sujita Sujita Sujita Sujita Sujita Sujita Sujita Sujita Sujita Sujita, Sujita Sukarne Sukarne Sukarne Sulhaini Sutaryono, Yusuf Akhyar Suteja Suteja Suteja Suteja Suteja Suteja Suteja Suteja Suteja Suteja Suteja Suteja Suteja Suteja Suteja Suteja Suteja Suteja Suteja, Suteja Syafri, Edi Syahrul Syarif Hidayatullah Syarif Hidayatullah Syarif Hidayatullah Syarif Hidayatullah Syharul Syahrul . T Topan, T T. Topan, T. Tawaqqal, Akbar Thiagamani, Senthil Muthu Kumar Thiagamani, Sentil Muthu Kumar Topan Gusti Wibowo Ulfa Handayani Wibi Wahid Muharram Yayan Gunanto Yayat Indra Saputra Yesung Allo Padang Yogi Prayudi Yudi Ahmad Efendi Yusuf Ahyar Sutaryono Yusuf Akhyar Sutaryono Yusuf Akhyar Sutaryono Yusuf Akhyar Sutaryono Sutaryono Zahratul Laili