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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 (JMEF) 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

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Cold Plasma-Induced Surface Modification of Microfibrillated Cellulose Using Lauric Acid to Enhance Compatibility in Polymer Composites Rifathin, Annisa; Wijaya, Ade Mundari; Roziafanto, Achmad Nandang; Laksmono, Joddy Arya; Nugraha, Adam Febriyanto; Chalid, Mochamad
Indonesian Journal of Chemistry Vol 25, No 4 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.104738

Abstract

Green materials, such as microfibrillated cellulose (MFC), are increasingly used as fillers in polymer composites for academic and industrial applications. However, their inherent hydrophilic property limits compatibility with polymer matrix. This study employs an environmentally friendly cold plasma technique to modify the surface of MFC, improving its compatibility with the polymer. Plasma treatment was performed at a voltage of 60 V for 30 min by making three molar ratios (3:1, 4:1, and 5:1) between lauric acid as a hydrophobic precursor and anhydroglucose (AGU). The results indicate several changes in the modified MFC properties, as evidenced by the appearance of a new peak at a wavenumber of 1742 cm−1 (ester’s C=O) in FTIR spectra, indicating successful plasma-induced grafting. XPS results also confirm the formation of O–C=O bond at a binding energy of 289.3 eV. The optimum conditions were obtained at a molar ratio of 4:1 (lauric acid:AGU). There was a decrease in the hydrophilic property of MFC, indicated by an increase in the water contact angle from 50.16° to 71.26°. Moreover, the surface tension difference between MFC and polypropylene was significantly reduced from 136.99 to 47.51%, suggesting improved compatibility.
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. is a type of brown seaweed often found in tropical waters, but it has not been optimally used. The high cellulose content of Sargassum sp. can be used to produce cellulose nanocrystals (CNC). CNC can act as a bionanocomposite-reinforced nanomaterial. This study aimed to determine the most effective sulfuric acid concentration for extracting cellulose nanocrystals from Sargassum sp. CNC was extracted from Sargassum sp. using acid hydrolysis and sonication. The sulfuric acid concentration was varied to 30, 40, 50, and 60%. CNC was characterized using Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and thermogravimetric analysis (TGA). FTIR analysis confirmed the presence of characteristic CNC functional group peaks, including C–O–C (~1160 cm⁻¹), C–O (~1050–1030 cm⁻¹), and β-(1→4)-glycosidic C–H (~897 cm⁻¹) as the CNC fingerprint. The FTIR findings indicated that the CNC extracted by sulfuric acid hydrolysis differed significantly from the raw Sargassum sp. material. Additionally, the XRD results showed that acid hydrolysis substantially affected the amorphous regions of cellulose. With 40% acid hydrolysis, the XRD analysis showed the highest CNC degree of 77.6%. Thermal analysis using TGA and DTG revealed that cellulose nanocrystals treated with 40% acid hydrolysis yielded CNC with enhanced thermal stability, exhibiting a maximum thermal decomposition temperature of 369.60°C. CNC isolated from Sargassum sp. cellulose has the potential to serve as a suitable source for manufacturing nanocomposites in various applications, such as pharmaceuticals, food packaging, and biomedical fields.
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 Adream Bais Junior Ahmad Z. Taning Anne Zulfia Arbi Irsyad Fikri Arief Ramadhan Arief Ramadhan Arisanti, Anisa Galuh 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 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 Karuana, Feri kristaura, Belle Luh Putu Ratna Sundari Majid Amrullah Masrudin Masrudin Maurice Efroza Mochamad Irfan Fathurrohman Mohamad Irfan Fathurrohman Muhamad Hananuputra Setianto Muhammad Ariya Afif 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 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 Tomy Abuzairi Wijaya, Ade Mundari Wimada, Andrias Rahman Yermia Andri Prawira Zahra Krishna Hadi