ROSIDAH, AFIRA AINUR (2017) STUDI BAHAN AKUSTIK SILICONE RUBBER BERPORI BERPENGUAT NANO SELULOSA DARI SERAT TANDAN KOSONG KELAPA SAWIT. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Komposit berpenguat nano filler saat ini menjadi salah satu material yang sedang dikembangkan. Salah satu aplikasinya dapat digunakan sebagai bahan akustik. Bahan akustik digunakan untuk menyerap suara. Tujuan dari penelitian ini adalah menganalisis pengaruh ukuran dan fraksi berat terhadap morfologi, densitas dan nilai koefisien absorpsi suara. Penelitian ini menggunakan silicone rubber berpori sebagai matriks dan mikro selulosa serta nano selulosa sebagai filler. Fraksi berat yang dipakai yaitu 2%, 4% dan 6%. Pengujian yang dilakukan dalam penelitian ini meliputi SEM, FTIR, densitas dan koefisien absorpsi suara. Ukuran filler dan penambahan fraksi berat menyebabkan perubahan jumlah dan bentuk pori. Pori teratur dengan jumlah besar ada pada silicone rubber berpori murni dengan 31,707% area. Ukuran filler menyebabkan rata-rata nilai α turun. Nilai α tertinggi pada frekuensi 4000 Hz ada pada SR berpori murni, yaitu sebesar 0,431. Sedangkan semakin besar fraksi berat mikro selulosa menyebabkan penurunan nilai koefisien absorpsi suara. Sedangkan penambahan filler nano selulosa akan menyebabkan penurunan nilai α pada fraksi 2% dan 4% akan tetapi mencapai nilai α tertinggi pada 6% berat dengan nilai α pada frekuensi 4000 Hz sebesar 0,425
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Composite materials reinforced by nanofiller are now becoming one of the developed materials. It can be used as an acoustical material. Acoustical materials are often used as sound absorber. The purpose of this study was to analyze the effect of size and weight fraction of filler to the morphology, density and sound absorption coefficient. This study used porous silicone rubber as the matrix, microcellulose and nanocellulose as the filler. Weight fractions used for this research were 2%, 4% and 6%. Tests performed in this study were included SEM, FTIR, density and sound absorption coefficient. Size and weight fraction differences caused changing amount of pores and type of pores. Well-regulated pores with the highest amount of pores was obtained on pure porous silicone rubber with 31,707% area. Size differences caused decreasing the avarage of sound absorption coefficient value. The highest α value at 4000 Hz was obtained on pure porous silicone rubber, that was 0,431. On the other hand, weight fraction differences of microcellulose caused decreasing of α value. Addition of nanocellulose caused decreasing of α value at 2% and 4% fraction, but getting the highest α value at 6% fraction with α value at 4000 Hz was 0,425.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Uncontrolled Keywords: | teknik material, komposit |
| Subjects: | Q Science > QD Chemistry > QD320 Cellulose. Hydrolysis T Technology > T Technology (General) |
| Divisions: | Faculty of Industrial Technology > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis |
| Depositing User: | AFIRA AINUR ROSIDAH |
| Date Deposited: | 30 Jan 2017 06:36 |
| Last Modified: | 05 Mar 2019 03:27 |
| URI: | http://repository.its.ac.id/id/eprint/1764 |
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