Purnama, Afifah Nuraini Putri (2025) Pengaruh Struktur Dan Konduktivitas Listrik Bahan Reduced Graphene Oxide (RGO) Berbasis Biomassa Sebagai Pelapis Material Hidrofobik. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Penelitian ini mempelajari bagaimana struktur dan konduktivitas bahan Reduced Graphene Oxide (rGO) dari biomassa mempengaruhi sifat anti-air (hidrofobik) bahan tersebut. Penelitian ini dilakukan untuk mengevaluasi sifat permukaan dan karakteristik fisik dari bahan rGO berbasis biomassa, serta hubungannya terhadap ketahanan terhadap air (hidrofobisitas). Berdasarkan hasil pengujian sudut kontak air, bahan rGO dari biomassa seperti batok kelapa dan kopi menunjukkan tingkat ketahanan terhadap penyerapan air yang lebih tinggi, yang ditunjukkan oleh nilai sudut kontak yang lebih besar, dibandingkan dengan bahan dari sekam padi yang lebih bersifat hidrofilik. Hasil analisis morfologi melalui metode SEM menunjukkan bahwa struktur bahan rGO dari biomassa berbeda, dimana struktur yang lebih rapat dan stabil berkorelasi positif dengan sifat tahan air. Kekasaran tingkat mikro-nano dan polaritas permukaan sangat mempengaruhi sifat hidrofobik material. Ketika kekasaran permukaan ditingkatkan sampai level tertentu, sudut kontak air bisa mencapai lebih dari 120°, yang menandakan material sangat anti air (superhidrofobik). Sifat ini dipengaruhi oleh struktur karbon yang lebih utuh dan kandungan gugus polar yang lebih rendah, sehingga mampu mempertahankan kestabilan konduktivitas listrik dan menahan infiltrasi air. Berkurangnya gugus kimia yang bersifat polar pada permukaan rGO juga membuat material lebih anti-air. Hasil penelitian ini menegaskan potensi biomassa seperti batok kelapa dan kopi sebagai sumber bahan rGO berkualitas tinggi untuk aplikasi sebagai lapisan pelindung anti air. Disarankan agar proses sintesis dan aplikasi pelapisan dilakukan secara optimal guna meningkatkan performa perlindungan terhadap air dan stabilitas material secara umum.
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This study investigates how the structure and conductivity of Reduced Graphene Oxide (rGO) derived from biomass influence its water-repellent (hydrophobic) properties. The research was conducted to evaluate the surface characteristics and physical properties of biomass-based rGO materials and their relationship to water resistance (hydrofobicity). Based on water contact angle measurements, rGO from biomass such as coconut shells and coffee demonstrated higher resistance to water absorption, indicated by larger contact angle values, compared to materials from rice husk, which exhibited more hydrophilic behavior. Morphological analysis using SEM revealed that the structures of biomass-derived rGO differ; more compact and stable structures correlate positively with water resistance. Micro- and nano-scale surface roughness and surface polarity greatly affect the hydrophobic behavior of these materials. When surface roughness is increased to a certain level, the water contact angle can exceed 120°, indicating a superhydrophobic (super-repelling) property. These properties are influenced by a more intact carbon structure and lower polar functional group content, allowing the material to maintain electrical conductivity stability and resist water infiltration. The reduction of polar chemical groups on the rGO surface also enhances its water-repelling capabilities. The findings confirm the potential of biomass such as coconut shells and coffee as high-quality sources for rGO production, suitable for use as protective anti-water coatings. It is recommended that synthesis and coating application processes be optimized to improve water protection performance and overall material stability.
Item Type: | Thesis (Other) |
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Uncontrolled Keywords: | Konduktivitas, Polaritas, Reduced Graphene Oxide (rGO), Sudut Kontak Air (WCA). |
Subjects: | Q Science > QC Physics Q Science > QC Physics > QC100 Crystals. T Technology > TD Environmental technology. Sanitary engineering > TD418 Water harvesting |
Divisions: | Faculty of Science and Data Analytics (SCIENTICS) > Physics > 45201-(S1) Undergraduate Thesis |
Depositing User: | Afifah Nuraini Putri Purnama |
Date Deposited: | 24 Jul 2025 07:52 |
Last Modified: | 24 Jul 2025 07:52 |
URI: | http://repository.its.ac.id/id/eprint/121030 |
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