Shabrina, Nabilla (2016) Pengaruh Panjang Serat Terhadap Nilai Koefisien Absorpsi Suara Dan Struktur Morfologi Komposit Berpenguat Serat Rami Dan Bambu Betung Dengan Matriks Gypsum Untuk Aplikasi Otomotif. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Penelitian ini dilakukan untuk membuat material komposit
gypsum berpenguat serat alam yaitu serat bambu betung dan
rami untuk bahan penyerap suara. Permasalahan yang dikaji
adalah untuk mengetahui hubungan panjang serat pada komposit
bermatrik gypsum terhadap nilai koefisien absorpsi suara (α),
serta morfologi dari material. Panjang serat yang digunakan
adalah 20mm dan 60mm dengan fraksi volum 30% serat : 70%
gypsum. Terdapat 4 macam variasi spesimen yaitu
(20mmR/20mmB-G), (20mmR/60mmB-G), (60mmR/20mmB-G),
dan (60mmR/60mmB-G) Tujuannya untuk mendapatkan
hubungan nilai koefisien absorpsi suara, serta morfologi material
dengan panjang serat yang diberikan serta aplikasinya dalam
material penyerap suara yang memenuhi standar ISO 11654.
Selain itu material juga diuji TGA(Thermogravimetric Analysis)
untuk mengetahui kerentanan terjadinya degradasi terhadap
kenaikan temperatur. Metode pembuatan komposit yang
digunakan adalah hand lay up. Metode pengujian berdasarkan
standart ASTM E1050, ASTM E2809 dan ASTM E1131. Hasil
pengujian menunjukkan bahwa spesimen (60mmR/60mmB-G)
memiliki nilai α yang tertinggi pada frekuensi 4000Hz. Menurut
hasil pengamatan dengan Scanning Electron Microscope,
spesimen (60mmR/60mmB-G) memiliki struktur yang lebih
berpori dibandingkan ketiga spesimen lainnya yang menjelaskan
nilai α terbesar yang ada di spesimen ini.Uji Thermogravimetric
Analysis menjelaskan batas temperatur yang diperbolehkan untuk
aplikasi material R/B-G sebelum mengalami degradasi yaitu
300oC.
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This research was done to make gypsum composite fiber
reinforced material to be a sound absorbing material. The
problems studied was to understand the connection between the
length of ramie and betung bamboo fiber with gypsum matrix
composite on the sound absorption coefficient value (α), and the
morphological structure. The fiber length was varied in 20mm
and 60mm with the volume fraction of 30% fibers: 70% gypsum. 4
varieties of specimens were observed in this research,
(20mmR/20mmB-G), (20mmR/60mmB-G), (60mmR/20mmB-G),
and (60mmR/60mmB-G0). The aim was to get a good relation
between sound absorption coefficient value and morphological
structure with given fibers length and its application as sound
absorbing material according to ISO 11654 standard. Specimens
were also tested by Thermogravimetric Analysis to get the range
of safe temperature for the application of this material before the
degradation. Method used to fabricate the composites was hand
layup. Methods of testing were in accordance to ASTM E1050,
ASTM E2809 and ASTM E1131 standards. The result shows that
the (60mmR/60mmB-G) specimen owned the highest α value at
the frequency of 4000 Hz. From Scanning Electron Microscope,
the correlations between α value and morphological structure of
the composites were revealed. (60mmR/60mmB-G) specimen
show the most porous structure among the others 3 specimens as
a proved of the highest α value. From Thermogravimetric
Analysis, the working temperature of R/B-G composites before
the degradation was also revealed. This composites should not
working above the temperature of 300oC
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSMt 620.118 Sha p |
| Uncontrolled Keywords: | gipsum, koefisien absorpsi, morfologi material, serat rami, serat bambu betung, absorption coefficient, betung bamboo fiber, gypsum, morphological structure, ramie fiber |
| Subjects: | T Technology > TN Mining engineering. Metallurgy |
| Divisions: | Faculty of Industrial Technology > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis |
| Depositing User: | Anis Wulandari |
| Date Deposited: | 14 Jul 2017 05:35 |
| Last Modified: | 27 Dec 2018 07:44 |
| URI: | http://repository.its.ac.id/id/eprint/42166 |
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