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All Journal Jurnal Ilmu Dasar Jurnal Sains Materi Indonesia Jurnal Sains Dasar Jurnal Fisika FLUX Jurnal Penelitian Pendidikan IPA (JPPIPA) SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Agroteknika Jurnal Teknologi Bahan dan Barang Teknik Journal of Applied Science, Engineering, Technology, and Education Journal of Fibers and Polymer Composites Jurnal Sains Materi Indonesia

S. Sujito

Jurusan Fisika, Fakultas Matematika Dan Ilmu Pengetahuan Alam (FMIPA) Universitas Jember

Author-ID : 2977424

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences 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 Other

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THE IMPROVEMENT OF RAMIE FIBER PROPERTIES AS COMPOSITE MATERIALS USING ALKALIZATION TREATMENT: NaOH CONCENTRATION Umi Lailatul Jamilah; Sujito Sujito
Jurnal Sains Materi Indonesia Vol 22, No 2: APRIL 2021
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/jsmi.2021.22.3.6182

THE IMPROVEMENT OF RAMIE FIBER PROPERTIES AS COMPOSITE MATERIALS USING ALKALIZATION TREATMENT: NaOH CONCENTRATION. Ramie fiber is a plant fiber that has good quality and potential as a constituent of composite materials. In this study, ramie fiber surface modification was conducted through alkalization with various at 0%, 4%, 5%, 6%, 7%, 8%, and 9% concentrations of NaOH using a magnetic stirrer with a speed of 200 rpm at 70οC for 5 hours. Alkaline ramie fibers are characterized using the Cheson method to determine the chemical composition of ramie fiber, FT-IR test to determine the function group of ramie fiber, morphological test to know the surface structure and diameter of ramie fiber, as well as tensile test to know the tensile strength and tensile modulus of PLA/ramie composite. Overall, the increase of NaOH concentration up to 8% percentage was able to increase the level of cellulose and lignin ramie fibers by 88.180 % and 2.444 %, as well as lower hemicellulose levels of 1.446 %. The alkalization treatment of 8% NaOH, optimally reduces the hydrophilic properties of the fiber. The increased concentration of NaOH makes the fiber surface cleaner and the diameter smaller, but the fiber structure is damaged at a concentration of NaOH more than 8%. Tensile test results showed that alkalized ramie fibers with an 8% concentration of NaOH produced PLA/ramie composites with the highest tensile strength and tensile modulus of 57.37 MPa and 248.25 MPa. Thus, the optimum ramie fiber properties are increased using alkalization with an 8% concentration of NaOH.

Pengaruh Fraksi Massa terhadap Sifat Mekanik Material Komposit Binderless dari Ampas Tebu dan Serbuk Kayu Sengon Aan Ubaidillah; Sujito Sujito; Endhah Purwandari
Jurnal Sains Dasar Vol 8, No 2 (2019): October 2019
Publisher : Faculty of Mathematics and Natural Science, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jsd.v8i2.23676

Analisis pengaruh fraksi massa serat ampas tebu dan serbuk kayu sengon terhadap sifat mekanik material komposit binderless dapat dilakukan dengan melakukan pengujian tarik dan pengujian bending terhadap material komposit binderless hasil sintesis. Pengujian dilakukan terhadap material komposit binderless dengan fraksi massa serbuk kayu sengon 0%-100%. Hasil dari pengujian menunjukkan kekuatan tarik paling tinggi berada pada fraksi massa serbuk kayu sengon 100% (tanpa serat ampas tebu) dengan nilai sebesar (8,11 ± 0,69) MPa. Sementara untuk modulus elastisitas paling besar berada pada fraksi massa serbuk kayu sengon 40% dengan nilai sebesar (53,14 ± 1,73) MPa. Hasil pengujian bending menunjukkan kekuatan bending paling besar berada pada fraksi massa serbuk kayu sengon 90% dengan nilai sebesar (15,82 ± 1,90) MPa. Sementara itu untuk nilai modulus bending paling tinggi berada pada fraksi masssa serbuk kayu sengon 100% dengan nilai sebesar (439,88 ± 30,36) MPa.

Kekuatan Tarik dan Modulus Elastisitas Bahan Komposit Ramah Lingkungan Berbasis Serat Bambu dan Matriks Asam Poli Laktat Sujito Sujito
Jurnal Fisika FLUX Vol 9, No 1 (2012): Jurnal Fisika Flux Edisi Februari 2012
Publisher : Lambung Mangkurat University Press

Dalam makalah ini dibahas sintesis dan sifat mekanik bahan komposit ramah lingkungan berhasil disintesis dari resin asam poli laktat (PLA) dengan penguat serat bambu. Sintesis bahan komposit dilakukan dengan menggunakan tehnik pengepresan campuran antara serat bambu (panjang 10,0 mm, 20,0 mm, 30,0 cm, 40,0 cm, dan 100,0 cm) dan resin PLA, pada temperatur 125OC dan tekanan 140 MPa. Sifat mekanik, kekuatan tarik dan modulus Young, bahan komposit hasil sintesis ditentukan melalui uji tarik dengan menggunakan mesin uji Instron Universal Model 5567 dan kecepatan tarikan 1,0 mm/menit. Adapun dimensi bahan komposit ramah lingkungan untuk keperluan uji tarik ini adalah panjang 100,0 mm, lebar 10,0 mm, dan tebal 2,0 mm. Hasil pengukuran menunjukkan bahwa kekuatan tarik dan modulus Young bahan komposit ramah lingkungan hasil sintesis dipengaruhi oleh panjang serat. Bahan komposit ramah lingkungan hasil sintesis dengan penguat serat bambu panjang 100,0 mm memiliki kekuatan tarik paling besar.

Mechanical Properties and Biodegradability of Bamboo and Sengon Wood Thin Sheets Reinforced Poly Latic Acid (PLA) Biocomposites) S. Sujito; Hanim Munawaroh; Endhah Purwandari
Jurnal ILMU DASAR Vol 14 No 2 (2013)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Development of biocomposite materials based on natural fibers and environmentally friendly resins to replace composite materials made from plastic and synthetic fibers give the consideration that the biocomposite materials are environmentally friendly materials. In this paper, we discuss the synthesis and characterization of biocomposite materials using a combination of thin sheets of bamboo reinforcement and resin sengon and poly lactic acid (PLA). As controls were also carried out the synthesis and characterization of biocomposite material with a thin layer of reinforcement only sengon bamboo and wood. Characterization of tensile strength and modulus of elasticity of the material is done by using the Tensile Test Machine ASTM D 638. In the mean time, biodegradability of materials are observed made by the method of burial for 1-4 weeks. Tensile test results show that the biocomposite material reinforced with a thin sheet bamboo has a tensile strength and modulus of elasticity greater than that of the other biocomposite materials produced in this study. Meanwhile, biocomposite materials with thin layers of wood sengon reinforced easily biodegradable (dG = 13.21 ± 0.59)%, compared to a biocomposite material with a thin layer of bamboo reinforcement (dG = 10.69 ± 0.79)%. From these results it can be concluded that the composite material with a thin layer of bamboo boosters are more likely to be applied to replace metallic materials.Keywords: Biocomposites, tensile strength, elastic modulus, biodegradability, bamboo and sengon wood thin layer.

ALAT SABLON UNTUK MENUNJANG TAMPILAN KEMASAN KRUPUK CUMI PADA KELOMPOK USAHA POKLAHSAR MANDIRI BANYUWANGI Mochamad Asrofi; Mochammad Edoward Ramadhan; Sujito Sujito
SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Vol 4, No 1 (2020): November
Publisher : Universitas Muhammadiyah Mataram

ABSTRAKProgram pengabdian kepada masyarakat bertujuan untuk menyelesaikan permasalahan yang dihadapi oleh mitra pengabdian yaitu kelompok usaha kecil rumahan “Poklahsar Mandiri” yang bergerak di bidang produksi kerupuk cumi. Kelompok usaha ini terletak di Desa Karangsari, Sempu, Banyuwangi. Metode pelaksaan pengabdian ini berupa studi wawancara dan observasi. Wawancara dilakukan berupa diskusi kecil tentang permasalahan kelompok mitra. Permasalahan utama yang dialami oleh mitra ini adalah kemasan plastik yang belum ada labelnya (polos). Kelompok usaha ini menginginkan adanya transfer teknologi yang berupa pembuatan alat sablon kemasan plastik untuk krupuk cumi. Selanjutnya, tim pengabdian melakukan observasi lapang untuk melihat kondisi nyata kelompok usaha ini. Alat sablon kemasan plastik berlabel diharapkan dapat menghasilkan kemasan plastik yang mempunyai daya tarik pembeli. Selain itu, sebagai akibat penjualan meningkat, kesejahteraan kelompok usaha kecil ini dapat terwujud. Sebagai informasi bahwa jumlah produksi kerupuk cumi dari kelompok usaha ini rata-rata per tahunnya 850 kg per tahunnya (harga per kg 40.000). Dengan adanya alat sablon diharapkan ongkos produksi dapat diminimalkan serta penjualan kerupuk cumi meningkat dikarenakan kemasan yang menarik. Hal tersebut diindikasikan peningkatan penjualan kerupuk cumi yang semula 850 kg menjadi 1000 kg per tahunnya. Kata kunci: alat sablon; kemasan plastik; kerupuk cumi; poklahsar mandiri. ABSTRACTThe community service program aims to solve the problems faced by community service partners, namely the small home business group "Poklahsar Mandiri" which is engaged in the production of squid crackers. This business group was located in Karangsari Village, Sempu, Banyuwangi. The method of implementing this service is in the form of interview and observation studies. Interviews were conducted in the form of small discussions about the problems of the partner group. The main problem experienced by these partners is plastic packaging that has no label (plain). This business group wants a technology transfer in the form of making screen printing plastic packaging tools for squid crackers. Furthermore, the community service team conducted field observations to see the real condition of this business group. This labeled plastic packaging screen printing tool is expected to produce plastic packaging that has a buyer appeal. In addition, as a result of increased sales, the welfare of this small business group can be realized. For information, the amount of squid cracker production from this business group averages 850 kg per year (price per kg 40,000). With the screen printing equipment, it is hoped that production costs can be minimized and sales of squid crackers will increase due to the attractive packaging. This is indicated by an increase in sales of squid crackers from 850 kg to 1000 kg per year. Keywords: screen printing equipment; plastic packaging; squid crackers; poklahsar mandiri.

Aplikasi Serat Alam Muntingia calabura sebagai Pengisi dalam Biokomposit Bermatriks Polivinil Alkohol (PVA): Karakteristik Sifat Kuat Tarik dan Permukaan Patahan Melbi Mahardika; Mochamad Asrofi; Afril Priyanto; Yuni Hermawan; Salahuddin Junus; Santoso Mulyadi; Sujito Sujito; Devita Amelia
Agroteknika Vol 4 No 1 (2021): Juni 2021
Publisher : Green Engineering Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32530/agroteknika.v4i1.103

Pemanfaatan serat alam Muntingia calabura sebagai pengisi bahan biokomposit belum dimanfaatkan secara optimal. Penggunaan serat alam ini memiliki potensi yang baik sebagai bahan pengisi biokomposit. Tujuan penelitian ini adalah untuk mengetahui pengaruh volume fraksi serat terhadap kekuatan tarik dan permukaan patahan biokomposit Polivinil Alkohol (PVA) dan Muntingia calabura. Volume fraksi serat di dalam PVA divariasikan 0%, 2%, 4%, 6% dan 8% (dari berat kering PVA). Pembuatan biokomposit menggunakan metode penuangan larutan gelatin. Biokomposit dikeringkan dalam suhu 70 ᵒC selama 12 jam. Setelah itu, spesimen biokomposit dipotong sesuai standar American Society for Testing and Materials (ASTM) D882-18. Hasil pengujian tarik menunjukkan bahwa peningkatan volume fraksi serat di dalam PVA mengakibatkan penurunan kekuatan tarik. Nilai kuat tarik tertinggi terdapat pada spesimen film PVA murni adalah 6,8 MPa. Penambahan serat sebesar 2% menyebabkan penurunan sebesar 14,7% dari nilai kuat tarik film PVA. Fenomena tersebut juga terjadi pada penambahan serat 4 – 8% di dalam matriks PVA. Hal tersebut didukung oleh pengataman Scanning Electron Microscope (SEM) yang menunjukkan adanya penggumpalan serat di dalam matriks.

KARAKTERISTIK MATERIAL KOMPOSIT BERBASIS LIMBAH KAYU JATI DAN PATI UMBI GARUT TERMODIFIKASI SODIUM TRIPOLIFOSFAT (STTP) Tri Widagdo; Sujito Sujito; Imam Rofi’i
Jurnal Teknologi Bahan dan Barang Teknik Vol 11, No 2 (2021)
Publisher : Balai Besar Bahan dan Barang Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37209/jtbbt.v11i2.207

Pengembangan bahan komposit hingga saat ini terus dilakukan untuk mendapatkan bahan komposit yang ramah lingkungan, guna menggantikan bahan komposit yang terbuat dari bahan plastik dan sintesis yang dinilai kurang ramah lingkungan. Pada penelitian ini dilakukan sintesis dan karakterisasi bahan komposit berbasis limbah serbuk gergaji kayu jati dan pati umbi Garut termodifikasi sodium tripolifosfat (STPP). Dilakukan variasi pada konsentrasi STPP yang digunakan untuk memodifikasi pati umbi Garut yaitu 0%, 1%, 3% dan 5%. Karakterisasi dilakukan meliputi kerapatan, kadar air, pengembangan tebal, kekuatan dan modulus bending. Hasil karakterisasi didapatkan bahwa karakteristik bahan komposit terendah terdapat pada bahan komposit tanpa perlakuan modifikasi (STPP 0%). Hal ini menunjukkan bahwa modifikasi perekat berbasis pati umbi Garut menggunakan STPP mampu meningkatkan karakteristik bahan komposit. Karakteristik tertinggi didapatkan pada bahan komposit dengan perekat pati umbi Garut termodifikasi STPP 3%. Nilai karakteristik bahan komposit jenis ini yaitu kerapatan (0,83 ± 0,03) g/cm3, kadar air (13,26 ± 2,4) %, dan pengembangan tebal (14,98 ± 1,72) %, sementara sifat mekanik berturut-turut yaitu kekuatan bending (7,63 ± 0,49) MPa dan modulus bending (86,93 ± 24,02) MPa.

Influence of Hydrothermal Temperature on the Physical Characteristics and Photocatalytics Activity of TiO2 for Degradation of Amoxicillin Sutisna Sutisna; Rija Rizqi Maulana; Wenny Maulina; Sujito Sujito; Nindha Ayu Berlianti; Edy Wibowo
Jurnal Sains Materi Indonesia Vol. 26 No. 1 (2024): Jurnal Sains dan Materi Indonesia
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jsmi.2024.2051

Titanium dioxide (TiO2) is a photocatalyst material widely used for environmental remediation applications. In this research, TiO2 material was synthesized using the hydrothermal method at various temperatures (150°C, 180°C, and 200°C). Based on the Fourier-transform infrared (FTIR) data, it was found that all the synthesized materials showed similar absorption peaks, and Ti-O-Ti bonds were detected, which is a characteristic of TiO2. X-ray diffraction (XRD) analysis showed that all the synthesized materials were TiO2 anatase with different crystalline sizes. The synthesized TiO2 using the hydrothermal temperature of 180°C showed the smallest crystalline size of 86.81 nm. Based on the analysis of the band gap energy, it was found that wider band gap energy was obtained at higher hydrothermal temperatures. The band gap energies of the synthesized materials are 3.18 eV, 3.19 eV, and 3.21 eV for hydrothermal temperatures of 150°C, 180°C, and 200°C, respectively. The photocatalytic activity of the three synthesized materials was tested in the photodegradation experiment of amoxicillin under ultraviolet (UV) irradiation. As a result, it was found that TiO2 synthesized at 180°C has the highest photocatalytic activity by degrading 100% of amoxicillin compounds within 120 minutes.

Evaluating Location Alternatives for a New Manufacturing Plant using Weighted Sum Model Method Dikky Suryadi; Warkianto Widjaja; Muchamad Sobri Sungkar; Kraugusteeliana, Kraugusteeliana; Iwan Adhicandra; Sujito, S.
Journal of Applied Science, Engineering, Technology, and Education Vol. 5 No. 1 (2023)
Publisher : PT Mattawang Mediatama Solution

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35877/454RI.asci1661

This study uses the Weighted Sum Model to analyze location possibilities for a new manufacturing plant based on six variables, including transportation cost, labor cost, taxes, utilities cost, closeness to suppliers, and proximity to customers. The data was collected and normalized using the min-max method, and weight values were assigned to each criterion based on their relative importance. The Weighted Sum Model formula was then used to determine the weighted sum for each alternative location, and City B was identified as the best location for the new manufacturing plant, followed by City A and lastly City C. The Weighted Sum Model provides an objective and systematic approach to evaluating location alternatives, allowing decision-makers to weigh the importance of each criterion and consider multiple factors in making informed decisions. The strategy is versatile and can be modified to numerous decision-making scenarios, making it a helpful tool for firms wishing to make location decisions based on data-driven approaches. In conclusion, the Weighted Sum Model is a useful tool for analyzing location possibilities for a new manufacturing plant and can help firms make informed and data-driven decisions regarding the optimum location for their operations

The Effect of Adding Variations in the Combination of Anthocyanin Extract and Curcumin Volume Fraction on the Mechanical Properties and Biodegradability of Seaweed-Based Bioplastic Materials Nuzulul Rahmah; Sujito; Yuda Cahyoargo Hariadi
Jurnal Penelitian Pendidikan IPA Vol 11 No 4 (2025): April
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i4.9769

The environmental issues caused by conventional plastic waste are becoming increasingly serious, driving the development of more eco-friendly bioplastics. This study examines the mechanical properties, solubility, and biodegradability of seaweed-based bioplastics with the addition of curcumin and anthocyanin as additives. The results indicate that bioplastics containing only anthocyanin exhibit the best tensile strength (3.78 ± 0.26 MPa) and elasticity (12.48 ± 0.49 MPa). In contrast, bioplastics containing only curcumin show the lowest mechanical properties. The addition of anthocyanin enhances tensile strength and elasticity through the formation of strong hydrogen bonds with seaweed polymers, whereas curcumin decreases mechanical properties due to less stable molecular interactions. In terms of solubility, anthocyanin recorded the highest value (72.04%), while curcumin had the lowest (37.61%) due to its lower water stability. Regarding biodegradability, the combination of anthocyanin (1.25%) and curcumin (3.75%), as well as pure curcumin (5%), showed the highest degradation rates, whereas a balanced mixture (2.5%:2.5%) exhibited the lowest biodegradability. In conclusion, anthocyanin improves the mechanical properties and solubility of bioplastics, while curcumin supports biodegradability. Seaweed-based bioplastics with added curcumin and anthocyanin show potential as eco-friendly antibacterial materials.

Co-Authors Aan Ubaidillah Afril Priyanto Devita Amelia Dikky Suryadi E. Hidayah Edy Wibowo Endhah Purwandari Hanim Munawaroh Imam Rofi’i Iwan Adhicandra Kraugusteeliana Kraugusteeliana Melbi Mahardika Mochamad Asrofi Mochammad Edoward Ramadhan Muchamad Sobri Sungkar N. Hidayatillah Nindha Ayu Berlianti Nuzulul Rahmah Rija Rizqi Maulana Salahuddin Junus Santoso Mulyadi Sutisna Sutisna Tri Widagdo Umi Jamilah Umi Lailatul Jamilah Wenny Maulina Widjaja, Warkianto Yuda C Hariadi, Yuda C Yuni Hermawan

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