Evaluasi Performa Cold Phase Change Materials Berbasis Carboxymethyl Cellulose-Nanopartikel Tio2 Dengan Filler Graphite

Azzalia, Shafira (2026) Evaluasi Performa Cold Phase Change Materials Berbasis Carboxymethyl Cellulose-Nanopartikel Tio2 Dengan Filler Graphite. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Phase Change Materials (PCM) merupakan material yang mampu menyerap dan melepaskan energi kalor laten pada temperatur tertentu sehingga berpotensi diaplikasikan sebagai media penyimpanan energi termal, khususnya pada sistem rantai dingin (cold chain). Penelitian ini bertujuan untuk mengevaluasi karakteristik struktur, morfologi, serta stabilitas performa termal PCM berbasis Carboxymethyl Cellulose (CMC) dengan penambahan grafit sebagai filler konduktif dan nanopartikel TiO₂ sebagai agen penstabil. PCM disintesis dengan variasi fraksi grafit 0,5; 1; dan 1,5 wt% serta penambahan TiO₂ nanopartikel, kemudian dikarakterisasi menggunakan Fourier Transform Infrared Spectroscopy (FTIR), X-Ray Diffraction (XRD), dan Scanning Electron Microscopy–Energy Dispersive X-ray (SEM–EDX). Hasil FTIR menunjukkan pita khas CMC, yaitu pita –OH pada kisaran 3200–3500 cm⁻¹, pita –COO⁻ pada sekitar 1635 cm⁻¹, serta pita fingerprint 700–500 cm⁻¹, yang menandakan struktur kimia utama CMC tetap terjaga tanpa terbentuknya gugus fungsi baru. Analisis XRD mengonfirmasi keberadaan fase grafit pada sudut 2θ ≈ 26° dan fase anatase TiO₂ pada 2θ ≈ 25,3° tanpa terbentuknya fase kristal baru. Pengamatan SEM pada perbesaran 500× hingga 5000× menunjukkan distribusi grafit dan TiO₂ yang relatif homogen di dalam matriks CMC. Uji Differential Scanning Calorimetry (DSC) menunjukkan bahwa CMC murni mengalami penurunan kalor laten dan pelebaran FWHM setelah 100 siklus termal, sedangkan PCM CMC–Grafit–TiO₂ mampu mempertahankan kalor laten. Hasil uji retensi suhu dingin menunjukkan bahwa PCM komposit mampu mempertahankan suhu di bawah 5 °C hingga 30–40% lebih lama dibandingkan CMC murni. Secara keseluruhan, kombinasi grafit dan nanopartikel TiO₂ terbukti meningkatkan stabilitas termal, ketahanan struktur material.
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Phase Change Materials (PCMs) are materials capable of absorbing and releasing latent heat at specific temperatures, making them promising candidates for thermal energy storage applications, particularly in cold chain systems. This study aims to evaluate the structural characteristics, morphology, and thermal performance stability of PCMs based on Carboxymethyl Cellulose (CMC) with the addition of graphite as a conductive filler and TiO₂ nanoparticles as a stabilizing agent. The PCMs were synthesized with graphite weight fractions of 0.5, 1, and 1.5 wt% combined with TiO₂ nanoparticles, and subsequently characterized using Fourier Transform Infrared Spectroscopy (FTIR), X-Ray Diffraction (XRD), and Scanning Electron Microscopy–Energy Dispersive X-ray (SEM–EDX). FTIR analysis revealed characteristic absorption bands of CMC, including the –OH stretching band at 3200–3500 cm⁻¹, the –COO⁻ stretching band around 1635 cm⁻¹, and fingerprint region bands at 700–500 cm⁻¹, indicating that the primary chemical structure of CMC remained intact without the formation of new functional groups. XRD analysis confirmed the presence of graphite and anatase TiO₂ phases, with major diffraction peaks at 2θ ≈ 26° and 2θ ≈ 25.3°, respectively, and no additional crystalline phases were detected. SEM observations at magnifications ranging from 500× to 5000× showed a relatively homogeneous distribution of graphite and TiO₂ within the CMC matrix. Differential Scanning Calorimetry (DSC) results demonstrated that pure CMC experienced a reduction in latent heat capacity and broadening of the full width at half maximum (FWHM) after 100 thermal cycles, whereas CMC–Graphite–TiO₂ PCMs maintained a latent heat. Cold temperature retention tests further indicated that the composite PCMs were able to maintain temperatures below 5 °C for 30–40% longer durations compared to pure CMC. Overall, the combined incorporation of graphite and TiO₂ nanoparticles significantly enhanced the thermal stability and structural durability of the PCM system.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Phase Change Material, Carboxymethyl Cellulose, Graphite, Nanopartikel TiO₂, Cold Chain Transportation. Phase Change Material, Carboxymethyl Cellulose, Grafit, Nanopartikel TiO₂, Cold Chain Transportation
Subjects:	H Social Sciences > HD Industries. Land use. Labor > HD9999.C715-.C7154 Composite materials Q Science > QC Physics > QC320 Heat transfer T Technology > TP Chemical technology > TP1140 Polymers T Technology > TP Chemical technology > TP374 Food--Packaging T Technology > TP Chemical technology > TP492.3 Refrigeration and refrigerating machinery
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis
Depositing User:	Shafira Azzalia
Date Deposited:	26 Jan 2026 04:06
Last Modified:	26 Jan 2026 04:06
URI:	http://repository.its.ac.id/id/eprint/130287

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