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All Journal Rekayasa Mesin Teosofia: Indonesian Journal of Islamic Mysticism Indonesian Journal of Chemistry Jurnal Agrotek UMMat Edukasi Islami: Jurnal Pendidikan Islam Paedagogia: Jurnal Pendidikan Jurnal Abdi Insani JTAM ROTARY Jurnal Informasi Sains dan Teknologi (ISAINTEK) HEUTAGOGIA: Journal of Islamic Education Journal of Fibers and Polymer Composites Jurnal Karya Pengabdian Teknik Mesin Protech Biosystems Journal
Suteja Suteja, Suteja
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Religion Agriculture, Biological Sciences & Forestry Arts Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Social Sciences Other

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Extraction and isolation of microcellulose from nunang tree (cordia dichotoma) stem fibers Suteja, Suteja; Sari, Nasmi Herlina; Pradityatama, Maharsa
Jurnal Agrotek Ummat Vol 12, No 4 (2025): Jurnal Agrotek Ummat: Oktober
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jau.v12i4.35596

Abstract

Mikro serat (holoselulosa) dari serat batang pohon nunang memiliki karakteristik mekanik, ketahanan panas yang baik dan densitas ringan sehingga cocok untuk material kemasan hasil pertanian (biokomposit). Lembaran serat nunang diperoleh dengan merendam kulit batang nunang dalam air dan dipotong ±1 cm untuk diblender, dan dilanjutkan proses pengayakan 40 mesh. Serat makro nunang kemudian diputihkan dengan larutan NaClO2 5% dan dimerserisasi dengan larutan NaOH 9% pada suhu 65 °C dan kecepatan 500 rpm selama 2 jam di atas magnetic stirrer. Hasil uji FTIR mengungkapkan telah hilangnya serapan pada bilangan gelombang 2026–1698 cm-1 yang merupakan indikasi hilangnya senyawa lignin, hemiselulosa, lilin dan senyawa pengotor lainnya. Pengujian difraksi sinar-X (XRD) menunjukkan niilai indeks kekristalan yang lebih tinggi setelah perlakuan kimia NaClO2 dan NaOH, sementara itu pengamatan foto SEM menunjukkan fitur permukaan yang lebih kasar sebagai tanda larutnya material pengotor. Setelah perlakuan kimia serat mikro juga mengindikasikan ketahanan termal yang lebih tinggi. Penelitian ini menunjukkan bahwa serat mikro nunang setelah perlakuan kimia memiliki potensi untuk industri kemasan hasil pertanian seperti film transparan ataupun bioplastik.
PELATIHAN MEMBUAT ECOBRICK UNTUK GENERASI MUDA DALAM MENINGKATKAN KEPEDULIAN KEBERSIHAN LINGKUNGAN DI PEDESAAN Hidayatullah, Syarif; Suteja, Suteja; Huda, Ahmad Akromul; Sari, Nasmi Herlina; Tawaqqal, Akbar
Jurnal Abdi Insani Vol 12 No 10 (2025): Jurnal Abdi Insani
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/abdiinsani.v12i10.2872

Abstract

The issue of plastic waste in rural communities has become an urgent environmental concern due to limited waste management facilities and low public awareness of the impacts of plastic pollution. The massive use of plastics without proper disposal systems has led to the accumulation of waste that contaminates the environment. One practical and educational solution that can be implemented is the production of ecobricks, which involves processing plastic waste into environmentally friendly building materials. This activity aimed to enhance the knowledge, awareness, and skills of young people aged 10–16 years in Ambung Village, East Masbagik District, in managing plastic waste through ecobrick-making training. The implementation method consisted of three stages: socialization, training, and evaluation. The socialization stage involved an interactive lecture on the dangers of plastic waste, followed by hands-on practice in making ecobricks using used plastic bottles. Evaluation was conducted using pre-test and post-test instruments to measure participants’ understanding of the reduce, reuse, recycle (3R) concept. The results showed a significant increase in participants’ knowledge levels, with an average pre-test score of 51.5 and a post-test score of 84.5, representing an improvement of 63.4%. Participants gained a better understanding of plastic waste management processes, were able to produce ecobricks independently, and were motivated to apply this knowledge at home while encouraging family members and peers to participate. Moreover, the activity fostered a sense of collaboration and creativity among participants by transforming plastic waste into functional products such as flower pots and garden benches. It can be concluded that ecobrick-making training effectively increased ecological awareness, knowledge, and practical skills among young people in plastic waste management, serving as an initial step toward a cleaner and more sustainable village environment.
Alat Pembelah Bambu untuk Meningkatkan Produksi Tusuk Sate di Kelompok Sepakat Bersama, Bengkaung, Batulayar, Lombok Barat Nurchayati, Nurchayati; Yesung Allo Padang; Hendry Sakke Tira; Nurpatria, Nurpatria; Suteja, Suteja
JURNAL KARYA PENGABDIAN Vol. 7 No. 2 (2025): Oktober, Jurnal Karya Pengabdian
Publisher : Jurusan Teknik Mesin FT Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jkp.v7i2.201

Abstract

Semenjak awal tahun 2022 tepatnya pada bulan Maret, pemerintah Republik Indonesia mulai melonggarkan aturan Covid-19. Dampak positif dari hal tersebut adalah kondisi wisata di Lombok mulai menggeliat lagi. Banyak wisatawan yang mulai berkunjung ke wilayah lombok, NTB. Sehingga perekonomian juga berangsur-angsur membaik. Seiring dengan bangkitnya sektor pariwisata ini, usaha kuliner juga mulai tumbuh lagi. Beberapa kuliner yang terkenal di Lombok adalah Sate Rembiga, sate pusut, sate ikan tanjung dan sate bulayak. Untuk membuat berbagai macam jenis sate ini tentunya sangat membutuhkan tusuk sate. Dusun Seraya desa Bengkaung kecamatan Batu Layar Lombok Barat merupakan salah satu daerah penghasil tusuk sate. Produksi tusuk sate di daerah ini masih dikerjakan dengan alat tradisional. Universitas Mataram sebagai salah satu perguruan tinggi negeri di kota Mataram yang memiliki sumber daya tenaga ahli dan gudangnya ilmuwan sudah seharusnya menunjukkan peran dan partisipasinya untuk peduli terhadap usaha kecil yang ada disekitar kampus. Jarak kelompok usaha tusuk sate ini tidak terlalu jauh dari Universitas Mataram, sekitar 10 km. Berdasarkan permasalahan tersebut maka diperlukan untuk memberikan penyuluhan dan pengenalan alat bantu agar produksi tusuk sate yang dihasilkan menjadi meningkat. Alat yang diaplikasikan ini adalah alat pembelah bambu, yang mampu meningkatkan produksi tusuk sate. Sebelumnya pekerja dalam membelah satu potong bambu, membutuhkan beberapa kali proses pembelahan. Setelah menggunakan alat pembelah bambu ini dapat dikerjakan lebih cepat. Satu kali proses pembelahan sepotong bambu menggunakan alat pembelah bambu ini menghasilkan 10 bilah bambu, yang artinya jauh lebih banyak dibandingkan dengan yang dilakukan selama ini oleh pekerja. Hasil Evaluasi pada saat penyuluhan dapat dikatakan berhasil dengan terlihat semangatnya peserta penyuluhan dalam mempraktekkan penggunaan alat ini. Kata kunci: pembelah bambu, tusuk sate
Pendidikan Perspektif Al-Ghazali dan Ibn Rusyd Serta Relevansinya di Abad 21 Hania, Irfan; Suteja, Suteja
HEUTAGOGIA: Journal of Islamic Education Vol. 1 No. 2 (2021)
Publisher : Fakultas Ilmu Tarbiyah dan Keguruan Universitas Islam Negeri Sunan Kalijaga Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14421/hjie.2021.12-10

Abstract

Tulisan ini memaparkan perbedaan pandangan dua tokoh terkenal dalam filsafat Islam, Al-Ghazali dan Ibn Rusyd, terhadap konsep alam semesta, sumber pengetahuan, dan pendidikan. Metodologi penelitian ini melibatkan analisis literatur yang mendalam untuk memahami argumen dan perspektif kedua tokoh ini. Hasil penelitian menunjukkan bahwa Al-Ghazali cenderung memprioritaskan keberagamaan dan sufistik dalam pendidikan, sementara Ibn Rusyd menekankan rasionalitas dan pertumbuhan intelektual. Kedua pendekatan ini mempengaruhi paradigma pendidikan Islam kontemporer, khususnya dalam konteks kurikulum dan peran pengetahuan. Limitasi dari penelitian ini melibatkan ruang lingkup studi yang terbatas pada dua tokoh dan kurangnya data empiris. Untuk penelitian selanjutnya, disarankan adanya kajian empiris untuk memahami implementasi dan dampak dari perspektif ini dalam pendidikan Islam kontemporer. Penelitian ini berdampak penting pada pembuat kebijakan pendidikan, desainer kurikulum, dan edukator yang terlibat dalam pendidikan Islam.
PENGEMBANGAN DAN KARAKTERISASI BIOKOMPOSIT PVA – NANOSELULOSA SERAT WARU DICOATING TIO2 Suteja, Suteja; Hidayatullah, Syarif
JTAM ROTARY Vol 8, No 1 (2026): JTAM ROTARY
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jtam_rotary.v8i1.17516

Abstract

Biokomposit berbahan polivinil alkohol (PVA) terus diteliti dan dikembangkan karena sifat ramah lingkungan dan aplikasi yang luas. Akan tetapi, ketahanan mekanik biokomposit ini terbatas, dan keberadaan agen antibakteri membatasi aplikasi praktisnya dibandingkan dengan plastik konvensional. Penyelidikan ini bertujuan untuk mengatasi keterbatasan tersebut dengan mengintegrasikan nanocellulose yang berasal dari serat waru bersama dengan lapisan TiO2. Evaluasi biokomposit PVA-waru nanocellulose yang dilapisi TiO2 mencakup pengukuran kekuatan tarik, aktivitas antibakteri, morfologi melalui mikroskop elektron pemindaian (SEM), dan analisis sudut kontak. Hasil penelitian menunjukkan kemajuan signifikan, dengan kekuatan tarik meningkat dari 3,31 menjadi 8,41 MPa dan ketebalan meningkat dari 0,18 menjadi 0,62 mm, yang dapat dikaitkan dengan peningkatan ikatan silang yang difasilitasi oleh lapisan TiO2. Selain itu, uji antibakteri menunjukkan zona penghambatan minimal kurang dari 3 mm terhadap E. coli dan S. aureus. Biocomposites or bioplastics made from polyvinyl alcohol (PVA) continue to be researched and developed due to their environmentally friendly properties and wide range of applications. However, the mechanical strength of these bioplastics is limited, and the presence of antibacterial agents restricts their practical application compared to conventional plastics. This study aims to address these limitations by integrating nanocellulose derived from waru fibers with a TiO2 layer. The evaluation of TiO2-coated PVA-waru nanocellulose bioplastics includes measurements of tensile strength, antibacterial activity, morphology via scanning electron microscopy (SEM), and contact angle analysis. The results show significant progress, with tensile strength increasing from 3.31 to 8.41 MPa and thickness increasing from 0.18 to 0.62 mm, which can be attributed to enhanced cross-linking facilitated by the TiO2 layer. Additionally, antibacterial testing revealed a minimum inhibition zone of less than 3 mm against E. coli and S. aureus.  
Potensi Inhibitor Alam sebagai Pelindung Korosi pada Permukaan Baja Karbon pada Lingkungan Asam Hidayatullah, Syarif; Suteja, Suteja
Jurnal Informasi, Sains dan Teknologi Vol. 8 No. 2 (2025): Desember: Jurnal Informasi Sains dan Teknologi
Publisher : Politeknik Negeri FakFak

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/isaintek.v8i2.353

Abstract

Inhibitor korosi alami menarik perhatian karena efektivitas biaya, biodegradabilitas, dan sifatnya yang ramah lingkungan. Dalam penelitian ini, ekstrak kulit jeruk madu dievaluasi sebagai inhibitor korosi alami untuk baja karbon dalam larutan HCl 1 M. Pengujian dilakukan menggunakan metode elektrokimia yang meliputi polarisasi potensiodinamik (PDP), spektroskopi impedansi elektrokimia (EIS), dan adsorpsi isotermal, pada suhu 27 °C dengan waktu paparan larutan selama 15 menit. Variasi konsentrasi inhibitor blank, 1000, 2000, dan 3000 ppm digunakan untuk menentukan pengaruh terhadap laju korosi. Hasil menunjukkan bahwa peningkatan konsentrasi inhibitor meningkatkan efisiensi penghambatan dengan nilai tertinggi sebesar 83,39% (PDP) dan 75,41% (EIS) pada konsentrasi 3000 ppm. Mekanisme adsorpsi ekstrak kulit jeruk madu pada permukaan baja karbon mengikuti kombinasi fisisorpsi dan kemisorpsi, membentuk lapisan pelindung yang menghambat reaksi anodik dan katodik. Temuan ini menunjukkan potensi ekstrak kulit jeruk madu sebagai inhibitor korosi yang efisien, murah, dan ramah lingkungan untuk aplikasi industri berbasis logam.
Perbaikan Sifat Mekanik, Thermal, dan DMA Komposit Polyester Diperkuat Serat Waru/CaCO3 Suteja, Suteja; Hidayatullah, Syarif
Jurnal Informasi, Sains dan Teknologi Vol. 8 No. 2 (2025): Desember: Jurnal Informasi Sains dan Teknologi
Publisher : Politeknik Negeri FakFak

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/isaintek.v8i2.358

Abstract

Natural fibers continue to attract the interest of researchers to develop them as composite reinforcements in automotive and non-construction building interior applications. Basically, natural fiber-reinforced polymer composites are not suitable for applications exposed to heat. Investigating changes in mechanical properties due to temperature increases, this research is very important to conduct. The addition of filler (CaCO3) is known to improve the performance of natural fiber-reinforced polymer composites. This study investigates the physical, mechanical, and thermal properties of polyester composites reinforced with waru fibers with CaCO3 powder filler. The composites were fabricated using the hand lay-up method with a volume fraction of 30% waru fibers and CaCO3 powder with a volume fraction of 0-10%. The density of the polyester composite increased from 1.42 to 1.68 and 1.87 g/cm3 as the volume fraction CaCO3 0-10%. The results of dynamic mechanical analysis (DMA) testing of the polyester composite showed that parameters such as loss modulus, storage modulus, and tan delta also increased with increasing CaCO3 content. Thermogravimetric analysis (TGA) testing also showed increased thermal resistance after the addition of 5% (wt) (STL) and 10% (wt) (ZMB) with a residual combustion of 6.54% and 7.89% for each STL and ZMB composite, respectively. Compared to the TKO composite, it had the lowest combustion residue of 3.61%. Tensile strength and elastic modulus showed the same trend, namely an increase, while the elongation of the composite decreased with the addition of CaCO3 powder. The overall test results showed that polyester composites reinforced with CWf fibers and CaCO3 fillers were suitable for automotive and building interior applications.
THE USE OF KAPOK SEED AGRICULTURAL WASTE AS A SOURCE OF NATURAL CORROSION INHIBITOR FOR ALUMINUM 6061 Hidayatullah, Syarif; Huda, Ahmad Akromul; Suteja, Suteja
Protech Biosystems Journal Vol 5, No 2 (2025): Protech Biosytem Journal (Desember)
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/protech.v5i2.35784

Abstract

Aluminum 6061 is one of the most widely used materials across various industrial sectors due to its good mechanical properties, lightweight nature, and corrosion resistance. However, in acidic environments, aluminum remains susceptible to corrosion, which can reduce its performance and service life. This study utilizes agricultural waste from kapok seeds (Ceiba pentandra) as an environmentally friendly corrosion inhibitor for Aluminum 6061. The extract was obtained through maceration using ethanol as the solvent and was applied in corrosion tests of Aluminum 6061 in 1 M HCl solution. The evaluation was conducted using potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS) techniques, along with isothermal adsorption analysis to understand the adsorption mechanism of the inhibitor on the metal surface. The results showed that the kapok seed extract significantly increased polarization resistance and reduced the corrosion rate, achieving a maximum inhibition efficiency of 78.77% at an optimal concentration of 3000 ppm. The inhibitor adsorption followed the Freundlich isotherm model, indicating strong binding interactions between the inhibitor molecules and the aluminum surface. Therefore, kapok seed extract has great potential as an environmentally friendly and cost-effective corrosion inhibitor for aluminum-based industries.
IMPROVING ANTIBACTERIAL, THERMAL AND MECHANICAL PROPERTIES OF PVA BIOCOMPOSITES REINFORCED WITH TIMOHO FIBER NANOCELLULOSE Suteja, Suteja; Hidayatullah, Syarif; Huda, Ahmad Akromul
Protech Biosystems Journal Vol 5, No 2 (2025): Protech Biosytem Journal (Desember)
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/protech.v5i2.36289

Abstract

Polyvinyl alcohol (PVA) has promising potential as gas purification membrane and bioplastic substitute for conventional materials. PVA material was reinforced with nanocellulose timoho fibers (NCT). Ten grams of NCT, 30 mL of distilled water, and 10 grams of PVA were stirred (500 rpm) at <80 oC on a magnetic stirrer until gel formed, then spread on a Petri dish and dried in an oven at 50 °C for 21 hours. The elongation, tensile strength, and elastic modulus test results of PVA-NCT biocomposites showed increases of 21%, 29.97%, and 31.57%, respectively, compared to PVA biocomposites. This was due to the role of NCT as reinforcing agent and the mobility of PVA when tensile test. SEM morphology showed a fine speckled surface due to clumping. The thermal resistance of biocomposite increased due to the good interfacial bonding between NCT and the PVA matrix, thereby reducing the rate of weight loss. Exothermic reactions occurred in both biocomposites. The PVA biocomposite had a melting temperature of 110.34 °C, and PVA-NCT biocomposite 119.83 °C. The antibacterial activity of the PVA biocomposite has a lower inhibitory power compared to the PVA-NCT biocomposite. These biocomposites can be used for membrane materials and environmentally friendly bioplastics. 
Characteristics of bio-composites from Polyvinyl alcohol reinforced micro-cellulose fibers of Paederia foetida Sari, Nasmi Herlina; Rivlan, Muhammad Nabil Fadhlurrohman; Suteja, Suteja; Hidayatullah, Syarif; Lokantara, I Putu
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.
Co-Authors Anindito Purnowidodo ARIS ARIS, ARIS Djarot B. Darmadi, Djarot B. Handoko, Suryawan Bagus Hendry Sakke Tira, Hendry Sakke Herlinasari, Nasmi Hidayatulah, Syarif Huda, Ahmad Akromul I Made Mara Irfan Hania Kadriyan, Hamsu Kafrawi, Shalahudin Made Wirawan, Made Maharsa Pradityatama Mubarokah, Laelah Al Nasmi Herlina Sari Nurchayati Nurchayati Nurpatria Nurpatria, Nurpatria Puad, Rae Nanda Azmi Putu Lokantara Rivlan, Muhammad Nabil Fadhlurrohman Rivlan, Muhammad Zaidan Fadhlurrohman Saifuddin Saifuddin Sanusi Sanusi Sinarep Sinarep Sutaryono, Yusuf Akhyar Syarif Hidayatullah Tawaqqal, Akbar Thiagamani, Sentil Muthu Kumar Winarso D. Widodo Yesung Allo Padang Yesung Allo Padang, Yesung Allo