Sultoni, Yusuf (2016) Pengaruh Proses Alkali Dan Fraksi Massa Serat Terhadap Morfologi, Kekuatan Lentur Dan Koefisien Absorbsi Suara Komposit Polyurethane/Coir Fiber Pada Komponen Muffler. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Komposit merupakan salah satu material yang
dikembangkan sebagai penyerap suara. Tujuan dari penelitian ini
adalah untuk menganalisa pengaruh proses alkali dan fraksi
massa terhadap morfologi, stabilitas thermal, kekuatan bending
dan nilai koefisien absorpsi suara pada komponen
muffler.Penelitian ini menggunakan komposit polyurethane/coco
fiber dengan fraksi massa serat sebesar 2,5%, 5% dan 7,5% dan
direndam selama 24 jam dengan NaOH. Pengujian absorbsi
suara dilakukan dengan metode Tabung Impedansi. Kondisi
morfologi dari material diamati dengan menggunakan Scanning
Electron Microscopy. Nilai α tertinggi didapatkan pada
spesimen PU+5%CFnonalkalinated dan PU+2,5%CFalkalinated
dengan nilai 0,444. Polyurethane memiliki kekuatan lentur
sebesar 14,1 MPa. Penambahan serat dan proses alkali pada
komposit akan menyebabkan kekuatan lentur meningkat.
Polyurethane memiliki foam yang bersifat closed cell.
Penambahan serat akan menyebabkan foam menjadi tidak teratur
dan mengecil.
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Composite is one of the materials developed as a sound
absorber. The purpose of this study was to analyze the effect
of alkali process and the mass fraction of the morphology,
thermal stability, bending strength and sound absorption
coefficient values on this muffler. Material was composite
polyurethane / coco fiber by fiber mass fraction of 2,5%, 5%
and 7,5 % and soaked for 24 hours with NaOH. Sound
absorption testing performed by Impedance Tube method.
Conditions morphology of the material was observed using
Scanning Electron Microscopy. The highest value obtained
on specimens α + 5% CFnonalkalinated PU and PU +
2.5% CFalkalinated with a value of 0.444. Polyurethane has
a flexural strength of 14.1 MPa. The addition of alkali in the
fiber and composite process would cause increased flexural
strength. Polyurethane has a closed cell foam that is. The
addition of fiber will cause the foam becomes irregular and
shrinking.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSMt 668.423 9 Sul p-1 |
| Uncontrolled Keywords: | Komposit, proses alkalisasi, polyurethane, coco fiber |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA418.9 Composite materials. Laminated materials. |
| Divisions: | Faculty of Industrial Technology > Material & Metallurgical Engineering |
| Depositing User: | EKO BUDI RAHARJO |
| Date Deposited: | 19 Nov 2019 07:38 |
| Last Modified: | 19 Nov 2019 07:38 |
| URI: | http://repository.its.ac.id/id/eprint/71875 |
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