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All Journal ALCHEMY Jurnal Penelitian Kimia
Hanisah Kamilah
Universiti Putra Malaysia
Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Environmental Science Materials Science & Nanotechnology

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Solvent and Heating Duration Effects on the Formation of Local Pyrophyllite PEG-4000 Hybrid Materials Siti Mutrofin; Wanda Ainun Shabiya; Hanisah Kamilah
ALCHEMY Jurnal Penelitian Kimia Vol 21, No 2 (2025): September
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.21.2.104456.346-357

Abstract

Hybrid materials are new materials formed by combining two or more components to produce enhanced and distinct properties from the individual constituents. One example is the hybrid system of  pyrophyllite and PEG 4000. This hybrid has not been reported and has potential for various applications. Local (Sumbermanjing) pyrophyllite-PEG 4000 hybrid was synthesized using casting and sol-gel methods with variations in solvent type (demineralized water, methanol, acetone) and heating time (1, 1.5, 2 hours) at a temperature of 100 – 105 ℃. Acetone produced the highest yield (34.89%) due to superior solvent-material interactions, while two-hour heating achieved maximum yield (36.20%) through enhanced intermolecular bonding. Statistical analysis confirmed significant differences in solvent variations, while heating time showed no significant effect. FTIR characterization revealed specific functional groups O–H stretching (Al-–OH linkage) at 3673.92 cm⁻¹, O–H stretching (3487.09 cm⁻¹), C–O stretching (1103.89 cm⁻¹), and Al–-OH bending vibration at 841.46 cm⁻¹, thus confirming successful hybrid formation. Melting point analysis showed 128.13 °C (1 hour heating hour) and 124.83 °C (2 hours heating time), indicating new material formation. 
The Influence of Solvent and Heating Time Toward the Percent Yield of Sumbermanjing Pyrophyllite-Polyethylene Glycol (PEG) 6000 Composites Siti Mutrofin; Ekantoro Ekantoro; Rurini Retnowati; Hanisah Kamilah
ALCHEMY Jurnal Penelitian Kimia Vol 22, No 1 (2026): March
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.22.1.104024.228-240

Abstract

The synthesis of clay-polymer composites has attracted considerable interest due to their promising potential properties. The composites were prepared from Sumbermanjing pyrophyllite and polyethylene glycol (PEG) 6000. This research aims to evaluate the influence of solvent and heating time on the percent yield of the composites. Pyrophyllite-PEG composites were synthesized via the casting and sol-gel methods with variations in solvent (demineralized water, methanol, acetone) and heating time (1, 1.5, and 2 hours). The highest yield (37.7239%) was achieved by a composite synthesized with acetone and a 2-hour heating treatment. The composite prepared with demineralized water showed poorer PEG diffusion into the pyrophyllite structure than did those prepared with methanol or acetone. A 2-hour treatment produced a more uniform, relatively smaller porous structure, despite subtle differences across various heating conditions. Statistical analysis revealed a significant difference among solvent treatments, but no significant difference among heating times. The melting points of the 1-hour and 2-hour composites were 120.7667 °C and 116.0333 °C, respectively, suggesting a successful composite synthesis. The successful composite synthesis was further confirmed by Fourier Transform Infrared (FTIR) spectra, which showed characteristic functional groups (O–H stretching, 3673.92 cm-1; C–H stretching, 2882.37 cm-1; Al–OH stretching, 1146.67 cm-1).
Co-Authors Ekantoro Ekantoro Rurini Retnowati Siti Mutrofin Wanda Ainun Shabiya