Pengaruh Variasi Suhu Pemanasan Graphene Oxide (GO) Berbasis Cangkang Kelapa Sawit terhadap Karakteristik Struktur dan Sifat Hidrofilik sebagai Pelapis Jaring Penangkap Kabut

Lestari, Sukma Ayu Arum (2026) Pengaruh Variasi Suhu Pemanasan Graphene Oxide (GO) Berbasis Cangkang Kelapa Sawit terhadap Karakteristik Struktur dan Sifat Hidrofilik sebagai Pelapis Jaring Penangkap Kabut. Other thesis, Institut Teknologi Sepuluh Nopember.

Text 5001221050-Undergraduate_Thesis.pdf - Accepted Version Restricted to Repository staff only Download (5MB) | Request a copy

Abstract

Kabut merupakan sumber air alternatif yang berpotensi dimanfaatkan melalui teknologi penangkap kabut (fog harvesting). Efektivitas proses penangkapan kabut dipengaruhi oleh sifat keterbasahan permukaan jaring sehingga diperlukan material pelapis yang mampu meningkatkan interaksi dengan molekul air. Penelitian ini bertujuan mengetahui pengaruh variasi suhu pemanasan terhadap karakteristik struktur, morfologi, dan sifat hidrofilik Graphene Oxide (GO) berbasis cangkang kelapa sawit serta menentukan suhu pemanasan optimum sebagai bahan pelapis jaring penangkap kabut. GO disintesis dari karbon aktif cangkang kelapa sawit menggunakan metode Hummers termodifikasi, kemudian dipanaskan pada suhu 200°C, 400°C, 600°C, dan 800°C. Hasil XRD menunjukkan terbentuknya GO yang ditandai oleh ekspansi jarak antarlapis akibat oksidasi, sedangkan FTIR menunjukkan berkurangnya gugus fungsi oksigen organik polar seiring peningkatan suhu pemanasan yang mengindikasikan terjadinya reduksi termal. Hasil SEM-EDX memperlihatkan perubahan morfologi dari struktur lembaran bertumpuk menjadi lebih terfragmentasi dan padat, serta merekam adanya efek pemekatan fasa anorganik silika bawaan prekursor alam pada suhu tinggi. Hasil AFM menunjukkan fluktuasi kekasaran permukaan yang dipengaruhi oleh dekomposisi struktur selama proses deoksigenasi. Pengujian WCA pada sistem pelapis komposit menunjukkan kecenderungan peningkatan sudut kontak yang konstan seiring kenaikan suhu pemanasan, menandakan berkurangnya sifat hidrofilik permukaan akibat dominasi kerangka karbon non-polar dan eliminasi gugus aktif organik oleh matriks cat. Berdasarkan keseluruhan hasil karakterisasi, kombinasi GO200°C sebagai sisi yang lebih hidrofilik dan GO800°C sebagai sisi yang lebih mendekati hidrofobik berpotensi membentuk gradien kebasahan (wettability gradient) yang mendukung proses penangkapan, pengumpulan, dan pengaliran air secara lebih efektif pada aplikasi jaring penangkap kabut. Hasil penelitian ini menunjukkan bahwa suhu pemanasan berperan penting dalam menentukan karakteristik struktur dan performa GO sebagai material pelapis untuk aplikasi penangkap kabut.
=====================================================================================================================================
Fog represents a potential alternative water source that can be utilized through fog harvesting technology. The effectiveness of the fog harvesting process is heavily influenced by the wettability of the mesh surface, necessitating a coating material capable of enhancing interactions with water molecules. This study aims to investigate the effect of varying heating temperatures on the structural characteristics, morphology, and hydrophilic properties of oil palm shell-based Graphene Oxide (GO), as well as to determine the optimum heating temperature for use as a fog harvesting mesh coating material. GO was synthesized from oil palm shell activated carbon using a modified Hummers method and subsequently thermal-treated at 200°C, 400°C, 600°C, and 800°C. Characterization was conducted using X-Ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy-Energy Dispersive X-ray Spectroscopy (SEM-EDX), Atomic Force Microscopy (AFM), and Water Contact Angle (WCA) measurements.XRD results confirmed the formation of GO, as indicated by the expansion of interlayer d-spacing due to oxidation, while FTIR spectra revealed a decrease in polar organic oxygen functional groups with increasing heating temperature, indicating thermal reduction. SEM-EDX analysis demonstrated a morphological transformation from a stacked sheet structure to a more fragmented and compact structure at elevated temperatures, while recording a relative enrichment effect of the native inorganic silica phase from the natural precursor at high temperatures. AFM results indicated surface roughness fluctuations driven by structural decomposition during the deoxygenation process. WCA testing on the composite coating system showed a trend of constantly increasing contact angles with increasing heating temperature, signifying a reduction in surface hydrophilicity due to the dominance of the non-polar carbon framework and the encapsulation of active organic groups by the paint matrix. Based on the overall characterization results, the combination of GO200°C as the more hydrophilic surface and GO800°C as the relatively more hydrophobic surface demonstrates potential for creating a wettability gradient that can enhance water capture, collection, and transport processes in fog-harvesting mesh applications. These findings indicate that heating temperature plays a crucial role in determining the structural characteristics, surface morphology, and functional performance of GO as a coating material for fog harvesting applications.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Graphene Oxide, Cangkang Kelapa Sawit, Penangkap Kabut, Suhu Pemanasan, Hidrofilisitas, Water Contact Angle. Graphene Oxide, Oil Palm Shell, Fog Harvesting, Heating Temperature, Hydrophilicity, Water Contact Angle.
Subjects:	Q Science > QC Physics > QC173.4.C63 Composite materials Q Science > QC Physics > QC 611.97.T46 Temperature effects. Including transition temperature
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Physics > 45201-(S1) Undergraduate Thesis
Depositing User:	Sukma Ayu Arum Lestari
Date Deposited:	21 Jul 2026 01:53
Last Modified:	21 Jul 2026 01:53
URI:	http://repository.its.ac.id/id/eprint/135413

Actions (login required)

View Item