Analisis Kinerja Akustik dan Termal pada Panel Insulasi dengan Memanfaatkan Limbah Egg Tray dan Serat Kain

Salsabila, Farah Zamir (2026) Analisis Kinerja Akustik dan Termal pada Panel Insulasi dengan Memanfaatkan Limbah Egg Tray dan Serat Kain. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Pengujian kinerja akustik dan termal dilakukan pada panel insulasi berbasis limbah egg tray dan textile fibre dengan dua jenis struktur, yaitu komposit dan sandwich. Struktur komposit dibuat dengan variasi komposisi egg tray dan textile fibre sebesar 100:0, 75:25, 50:50, 25:75, dan 0:100, sementara struktur sandwich dibuat dengan perbandingan 1:1, sehingga diperoleh enam sampel (ET-1, ETTF-2, ETTF-3, ETTF-4, TF-5, dan ETTFs-6). Karakteristik yang diuji meliputi densitas, porositas, konduktivitas termal, Sound Absorption Coefficient (SAC), Noise Reduction Coefficient (NRC), Sound Transmission Loss (STL), dan Sound Transmission Class (STC). Hasil pengujian menunjukkan bahwa peningkatan kandungan textile fibre dari ET-1 ke TF-5 menurunkan densitas sebesar 18,91% (0,2755 ke 0,2234 g/cm³) sekaligus meningkatkan porositas sebesar 76,57% (29,49% ke 52,07%). Karakteristik fisik ini berpengaruh langsung terhadap performansi termal dan akustik, meski dengan pola berbeda untuk tiap parameter: porositas yang lebih tinggi menurunkan konduktivitas termal dan meningkatkan absorpsi suara karena keduanya dipengaruhi mekanisme mikrostruktur yang serupa (rongga udara dan susunan serat yang lebih terbuka), sementara STL dan STC justru ditentukan oleh keseimbangan antara densitas permukaan dan redaman internal. TF-5 menjadi sampel terbaik untuk absorpsi suara dan insulasi termal dengan NRC 0,35 dan konduktivitas termal terendah (0,0744 W/mK), sedangkan ETTF-2 unggul dalam isolasi suara dengan STC tertinggi (12), koefisien transmisi (τ) yang konsisten lebih rendah, dan STL puncak 18,03 dB pada 4000 Hz akibat komposisi optimum antara massa egg tray dan redaman textile fibre. Struktur sandwich ETTFs-6 menghasilkan STL tertinggi pada frekuensi tinggi (18,86 dB pada 6300 Hz) namun STC terendah (9), akibat diskontinuitas impedansi antarlapisan yang baru efektif ketika panjang gelombang akustik mendekati skala ketebalan lapisan. ETTF-4 menjadi alternatif kompromi dengan performa yang relatif seimbang pada ketiga parameter. Secara keseluruhan, panel berbasis limbah egg tray dan textile fibre lebih sesuai dimanfaatkan sebagai material penyerap suara dan insulator termal dibandingkan partisi isolasi suara, mengingat nilai STC maksimum yang diperoleh belum memenuhi kebutuhan partisi bangunan.
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Acoustic and thermal performance testing was conducted on insulation panels based on egg tray and textile fibre waste, using two panel structures: composite and sandwich. The composite structure was fabricated with egg tray-to-textile fibre composition ratios of 100:0, 75:25, 50:50, 25:75, and 0:100, while the sandwich structure was fabricated with a 1:1 ratio, yielding six samples in total (ET-1, ETTF-2, ETTF-3, ETTF-4, TF-5, and ETTFs-6). The characteristics tested included density, porosity, thermal conductivity, Sound Absorption Coefficient (SAC), Noise Reduction Coefficient (NRC), Sound Transmission Loss (STL), and Sound Transmission Class (STC). The results showed that increasing textile fibre content from ET-1 to TF-5 reduced density by 18.91% (from 0.2755 to 0.2234 g/cm³) while increasing porosity by 76.57% (from 29.49% to 52.07%). These physical characteristics directly influenced the panels' thermal and acoustic performance, though with different patterns for each parameter: higher porosity reduced thermal conductivity and increased sound absorption, as both are governed by similar microstructural mechanisms (the presence of air voids and a more open fibre arrangement), whereas STL and STC were instead determined by the balance between surface density and internal damping. TF-5 was the best-performing sample for sound absorption and thermal insulation, with an NRC of 0.35 and the lowest thermal conductivity (0.0744 W/mK), while ETTF-2 performed best for sound isolation, achieving the highest STC (12), a consistently lower transmission coefficient (τ), and a peak STL of 18.03 dB at 4000 Hz, attributed to an optimal composition balance between egg tray mass and textile fibre damping. The ETTFs-6 sandwich structure produced the highest STL at high frequencies (18.86 dB at 6300 Hz) but the lowest STC (9), due to impedance discontinuity between layers that only becomes effective once the acoustic wavelength approaches the scale of the layer thickness. ETTF-4 served as a compromise alternative, offering relatively balanced performance across all three parameters. Overall, panels based on egg tray and textile fibre waste are better suited as sound-absorbing and thermal insulation materials than as sound isolation partitions, given that the maximum STC obtained does not yet meet building partition requirements.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Panel Akustik, Insulasi Termal, Egg Tray, Textile Fibre, Sound Absorption Coefficient, Sound Transmission Loss, Acoustic Panel, Thermal Insulation, Egg Tray, Textile Fibre, Sound Absorption Coefficient, Sound Transmission Loss
Subjects:	Q Science > QC Physics > QC162 Adsorption and absorption Q Science > QC Physics > QC221 Acoustics. Sound Q Science > QC Physics > QC271 Temperature measurements Q Science > QC Physics > QC320 Heat transfer T Technology > TH Building construction > TH880 Sustainable buildings. Sustainable construction. Green building
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Physics Engineering > 30201-(S1) Undergraduate Thesis
Depositing User:	Farah Zamir Salsabila
Date Deposited:	01 Aug 2026 03:07
Last Modified:	01 Aug 2026 03:07
URI:	http://repository.its.ac.id/id/eprint/140875

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