Article Per Year (5 Year)
p-Index From 2021 - 2026
3.737
P-Index
This Author published in this journals
All Journal Jurnal Pengolahan Hasil Perikanan Indonesia Jurnal Sains Materi Indonesia Majalah Kulit, Karet, dan Plastik Akuatikisle: Jurnal Akuakultur, Pesisir dan Pulau-Pulau Kecil Jurnal Rekayasa Material, Manufaktur & Energi Indonesian Journal of Chemistry Piston: Journal of Technical Engineering Specta Journal of Technology Akuatikisle: Jurnal Akuakultur, Pesisir dan Pulau-Pulau Kecil ASEAN Journal of Chemical Engineering Warta Perkaretan Journal of Materials Exploration and Findings Makara Journal of Technology Journal of Sciencce Technology and Visual Culture Jurnal Sains Materi Indonesia
Mochamad Chalid
Departemen Teknik Metalurgi Dan Material, Universitas Indonesia
Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

Published : 36 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 36 Documents
Search

 1   2   3   4 
Impact of Surfactants on the Performance of Plastic Modified Bitumen: A Study on Ductility, Penetration, and Softening Point Nugraha Wahyu Pratama; Mochamad Chalid; Farhan Aziz
Jurnal Sains Materi Indonesia Vol. 27 No. 1 (2025): Jurnal Sains dan Materi Indonesia
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jsmi.2025.11263

Abstract

This study explores the effect of surfactant use, namely Sorbitan Monostearate (Span 60) and Polyethylene Glycol 400 (PEG 400), on the physical and mechanical characteristics of bitumen modified with multilayer plastic. The focus of this study is to improve the compatibility between bitumen and multilayer plastic, which often have incompatible properties, thus affecting the performance of bitumen. Methodology applied includes the preparation of bitumen samples modified with varying surfactant concentrations, followed by microscopic analysis to assess particle dispersion and distribution. The results showed that the addition of surfactants significantly improved particle dispersion, with smaller particle sizes and more even distribution. Ductility tests showed that bitumen modified with surfactants had better flexibility compared to conventional bitumen, while penetration tests showed improved elasticity properties. These findings indicate that the use of surfactants in bitumen modification can improve the physical and mechanical properties of the material, providing potential for wider applications in the construction industry. Further research is recommended to explore other surfactant combinations and their impact on bitumen properties under various environmental conditions.
Effect of sulfuric acid treatment in cellulose nanocrystals extraction from Sargassum sp. seaweed: Efek perlakuan asam sulfat pada ekstraksi selulosa nanokristal dari rumput laut Sargassum sp. Fransiska, Dina; Hastiana, Sabina; Sidartha, B. Boy Rahardjo; Pangesty, Azizah Intan; Chalid, Mochamad; Priadi, Dedi; Ausias, Gilles; Hari Eko Irianto
Jurnal Pengolahan Hasil Perikanan Indonesia Vol. 28 No. 9 (2025): Jurnal Pengolahan Hasil Perikanan Indonesia 28(9)
Publisher : Department of Aquatic Product Technology IPB University in collaboration with Masyarakat Pengolahan Hasil Perikanan Indonesia (MPHPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17844/y5x3as39

Abstract

Sargassum sp. adalah jenis rumput laut cokelat yang banyak ditemukan di perairan tropis, namun belum dimanfaatkan secara optimal. Kandungan selulosa yang tinggi dalam Sargassum sp. dapat digunakan untuk menghasilkan selulosa nanokristal (CNC). CNC dapat digunakan sebagai bahan nano penguat bionanokomposit. Penelitian ini bertujuan untuk menentukan konsentrasi asam sulfat yang optimum untuk mengekstraksi nanokristal selulosa dari Sargassum sp. CNC dari Sargassum sp. diekstraksi menggunakan metode hidrolisis asam dan sonikasi. Variasi konsentrasi asam sulfat pada proses ekstraksi CNC, yaitu 30, 40, 50, dan 60%. Karakterisasi CNC dilakukan menggunakan spektroskopi inframerah (FTIR), difraksi sinar-X (XRD), dan analisis termogravimetri (TGA). Analisis FTIR mengonfirmasi keberadaan puncak gugus fungsi khas CNC, termasuk C–O–C (\~1160 cm⁻¹), C–O (\~1050–1030 cm⁻¹), dan C–H β-(1→4)-glikosidik (\~897 cm⁻¹) sebagai sidik jari CNC. Hal ini menunjukkan bahwa CNC yang diekstraksi melalui hidrolisis asam sulfat memiliki perbedaan yang signifikan dibandingkan dengan bahan baku Sargassum sp. Selain itu, hasil XRD menunjukkan bahwa hidrolisis asam berpengaruh pada berkurangnya daerah amorf pada CNC. Analisis XRD menunjukkan tingkat CNC tertinggi sebesar 77,6% pada hidrolisis asam sulfat 40%. Analisis termal menggunakan TGA dan DTG menunjukkan bahwa CNC yang diproses dengan hidrolisis asam sulfat 40% menghasilkan CNC dengan stabilitas termal yang meningkat, menunjukkan suhu dekomposisi termal sebesar 369,60 °C. CNC yang diisolasi dari Sargassum sp. berpotensi sebagai bahan pembuatan nanokomposit dalam berbagai aplikasi, misalnya bidang farmasi, pengemasan makanan, dan biomedis.
Characterization of Glass Fiber / Epoxy with Various Silicone Resin Addition Composite’s Compressive and Flexural Strength Muhamad Hananuputra Setianto; Herry Purnomo; Mochamad Chalid
Jurnal Sains Materi Indonesia Vol. 25 No. 1 (2023): Jurnal Sains dan Materi Indonesia
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jsmi.2023.277

Abstract

Glass fiber/epoxy composite was developed and used widely in manyapplications. Development on fiber and matrix of composite material was done to improve itsproperties. Improvement of the composite’s matrix can be done/by adding a modifier. Silicone resinis one kind of modifier that can be added to epoxy to improve its properties. Silicone resin willimprove the thermal stability of epoxy, but the effect on mechanical properties, especially whencombined with glass fiber, has not been done. In this study, a composite of glass fiber/epoxy with 0,10, 20, and 30 weight-% silicone resin addition was tested by compressive and flexural loadingmethods. Compressive strength and maximum strain tend to decrease with the increase of siliconeresin added. The highest compressive strength and strain were reached by a glass fiber and epoxycomposite without any modification at the value 240.63 MPa and 0.5%. Flexural strength willdecrease, but maximum strain will increase when more silicone resin is added to the matrix on theflexural test. The biggest flexural strength at 293.73 MPa was possessed by the composite withoutfurther modification, and a maximum strain of 5% was owned by the composite with 20% and 30%silicone resin addition.
Post-Consumer Recycling of Polymers for Sustainable 3D Printing Filament Material Mawaddah, Siti Mutia; Chalid, Mochamad; Maulidina, Sandrina Aras; Ashanti, Cut Kayla; Nugraha, Adam Febriyanto
Jurnal Sains Materi Indonesia Vol. 25 No. 1 (2023): Jurnal Sains dan Materi Indonesia
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jsmi.2023.707

Abstract

3D printing technology is rapidly developing in the manufacturing industry in producing complex and easily adjustable three-dimensional objects using the help of controls from computers. Behind its advantages, the 3D printing process requires filaments from virgin polymers which generally have a high price and adversely affect the environment. Post-consumer polymer recycling is a substitute material solution from virgin polymers and is environmentally friendly so as to support the realization of a circular economy. Studies on 3D printing filaments from post-consumer polymers have been discussed in this article, especially for filaments derived from acrylonitrile butadiene styrene (ABS), polylactic acid (PLA), and polyethylene terephthalate (PET). In addition, this article also reviews the sources of recycled raw materials, difficulties during the process, mechanical properties, thermal properties and efforts to improve the quality of 3D printing products. The results show that recycling post-consumer polymers for 3D printing filament applications is a promising approach to reducing the environmental impact of 3D printing while still retaining the mechanical properties and printability of filaments. This article provides insight into several studies that address the development of 3D printing using post-consumer polymer materials.
Mechanical and Thermal Properties Analysis on Bitumen Mixture with Additives: HDPE, PP and Lignin Junior, Adream Bais; Prawira, Yermia Andri; Chalid, Mochamad; Taning, Ahmad Z.; Nugraha, Adam Febriyanto
Piston: Journal of Technical Engineering Vol. 7 No. 2 (2024)
Publisher : Program Studi Teknik Mesin Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/pjte.v7i2.35464

Abstract

This study focuses on enhancing the performance and sustainability of asphalt materials in road construction by recycling High-Density Polyethylene (HDPE). Polypropylene (PP) and lignin as additives in bitumen. The Hot Melt Mixing method is employed to investigate the impact of different concentrations of HDPE, PP, and lignin on bitumen properties. Key properties such as ductility, penetration, softening point, and thermal behavior are analyzed, providing valuable insights into the potential of these additives to enhance bitumen performance. The findings demonstrate that higher concentrations of HDPE and PP result in reduced penetration depth, indicating increased hardness. The addition of lignin enhances penetration depth, contributing to the flexibility and performance of the bitumen mixture. Moreover, thermal analysis offers valuable information about the thermal behavior and stability of the bitumen-plastic-lignin blends, shedding light on their compatibility and interactions. This research contributes to the ongoing efforts in road construction and pavement engineering by exploring sustainable solutions that not only address plastic waste challenges but also improve the performance and durability of bituminous materials, making it a crucial step towards environmentally responsible and long-lasting asphalt pavements.
Density and Tensile Properties Analysis of Biocomposite from Lid Film Waste and Oil Palm Empty Fruit Bunch Fiber Farishi, Salman; Mawaddah, Siti Mutia; Chalid, Mochamad; Zulys, Agustino; Ghozali, Muhammad
Jurnal Sains Materi Indonesia Vol. 27 No. 2 (2026): Jurnal Sains Materi Indonesia
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jsmi.2026.14209

Abstract

Multilayer plastic waste, particularly from the bottled water industry, represents a persistent challenge in current plastic waste management strategies. Simultaneously, oil palm empty fruit bunch (OPEFB) waste, though often discarded, possesses significant potential for sustainable material development. This study explores the utilization of both waste streams as raw materials for biocomposite fabrication, thereby addressing environmental concerns while reducing dependence on virgin polymer resources. The multilayer lid film waste (comprising PET, LDPE, and LLDPE) and OPEFB fibers were processed through crushing, sieving, and extrusion to form pellets with varying OPEFB fiber loadings (30%, 50%, and 70% by weight). The resulting biocomposite was characterized using FTIR, XRD, SEM, density measurements, and tensile testing. The biocomposite containing 70% OPEFB exhibited the slowest degradation but also the lowest crystallinity (10.84%). In contrast, the 30% OPEFB composite showed the highest tensile strength (16.86 MPa) and elongation at break (3.23 MPa). SEM analysis revealed that a higher fiber content increased the porosity within the composite matrix. These findings demonstrate the potential of combining multilayer plastic and OPEFB waste for biocomposite applications, contributing to both material innovation and environmental sustainability.
Co-Authors Abdul Aziz Ammar Achmad Nandang Roziafanto Achmad Nandang Roziafanto, Achmad Nandang Adam Febriyanto Nugraha Adi Cifriadi Adi Cifriadi Adi Cifriadi Adiwar Adiwar Adiwar Adiwar, Adiwar Agustino Zulys Anne Zulfia Arbi Irsyad Fikri Arief Ramadhan Arief Ramadhan Arisanti, Anisa Galuh Ashanti, Cut Kayla Asron Ferdian Falaah Asron Ferdian Falaah Ausias, Gilles Azizah Intan Pangesty Azizah Intan Pangesty Bambang Priyono Chandra Liza Dasep Rusmana Dedi Priadi Dedi Supriadi Dessy Ayu Lestari Dick Ferieno Firdaus Dimas Agung Setiaji dody andi winarto Elfrida Ratnawati Elvi Kustiyah Elvi Kustiyah Farhan Aziz Farishi, Salman Fatriansyah, Jaka Fajar Fransiska, Dina Ghazidin, Hafisd Ghiska Ramahdita Ghiska Ramahdita Hanindito Haidar Satrio Hari Eko Irianto Hastiana, Sabina Herry Purnomo Imam Prabowo Imam Prabowo Ismail, Ika Ismojo Ismojo Jana Hafiza Joddy Arya Laksmono Junior, Adream Bais Karuana, Feri kristaura, Belle Luh Putu Ratna Sundari Majid Amrullah Masrudin Masrudin Maulidina, Sandrina Aras Maurice Efroza Mawaddah, Siti Mutia Mochamad Irfan Fathurrohman Mohamad Irfan Fathurrohman Muhamad Hananuputra Setianto Muhamad Hananuputra Setianto Muhammad Ariya Afif Muhammad Ghozali Muhammad Joshua Yuriansyah Barmaki Muhammad Nicko Azharry Setyabudi Mutya Rahmah Arbi Nelson Saksono Nono Darsono Nono Darsono, Nono Norma Arisanti Kinasih Novita Putri Wahyuni Nugraha Wahyu Pratama Nurhana Rafika Sari Nurhayati Nurhayati Oman Zuas Prawira, Yermia Andri Rifathin, Annisa Rini Riastuti, Rini Salma Ilmiati Santi Puspitasari Santi Puspitasari Shinta Dewi Ariantika Sholihah, Maharani Dewi Sianturi, Krisma Yessi Sidartha, B. Boy Rahardjo Singgih Prabowo Solly Aryza Taning, Ahmad Z. Tomy Abuzairi Wijaya, Ade Mundari Wimada, Andrias Rahman Zahra Krishna Hadi