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All Journal Pillar of Physics: Jurnal Berkala Ilmiah Fisika
- Ramli
Department of Physics, Universitas Negeri Padang, West Sumatra
Earth & Planetary Sciences Materials Science & Nanotechnology Physics

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Effect of The Volume of Banana Fiber As A Polymer Composite Amplifier With Polyester Resin Matrix On The Sound Absorption of Acoustic Materials rizka fauziah; - Ramli; Yenni Darvina; - Ratnawulan
PILLAR OF PHYSICS Vol 15, No 1 (2022)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/12561171074

Abstract

Research has been carried out on the banana fiber effect as a polymer composite amplifier with polyester resin matrix on the sound absorption of acoustic materials. Sound Absorber material is made with a variation in the volume of banana fiber that is different from polyester resin. The volume of banana fiber  and polyester resin used  is  15% Fiber:    85%  Polyester Resin,  20%  Fiber:  80%  Polyester Resin, 25% Fiber: 25%  Fiber:    75%   Resin Polyester, 30%  Fiber:    70%  Polyester Resin, 35%  Fiber:    65%  Polyester Resin. So when made composite then the amount of banana fiber used and polyester resin is 100%. Research methods are carried out in the collection of banana fiber, composite manufacturing and testing of sound absorption properties using impedance tubes. The testing of coefficient sound reflection and also sound absorbance coefficient testing is done using sound level meter and signal generator by reference to principle the method of tube impedance via approach to the acoustic box. The banana fiber composite result and polyester resin are able to reflect the sound of highest which is 0.44 in a frequency 500 Hz with fiber 15%. While lowest sound reflection coefficient is 0.06 at a frequency of 8000 Hz and fiber 35%. While in the test the highest value absorbance coefficient that absorbs sound  is  =  0.94 at fiber volume  35%,  and frequency 8000 Hz, while the lowest sound coefficient is 0.56 in fiber 15% and frequency 500 HZ
Structure Analysis Of Graphene Micro Oxide From Old Coconut Shell Waste Rika Nanda; - Ramli
PILLAR OF PHYSICS Vol 15, No 1 (2022)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/12600171074

Abstract

Synthesis of graphene oxide from old coconut shell waste material. It has many applications, one of which is used as a microwave absorber. Old coconut shells are used as waste because the ingredients are easy to get. This study aims to analyze the microstructure of graphene oxide from old coconut shell waste. In the carbonization process using a furnace with temperature variations from 250˚C to 450˚C, the furnace time is 120 minutes. Making activated charcoal from old coconut shells using the modified hummers method with oxidizing agents KmnO2, H2SO4, and NaNO3. Characterization of graphene oxide from old coconut shell waste using FTIR, XRD and SEM. The test results using FTIR on GO samples show the formation of GO material where the sample contains functional groups containing bonds between carbon (C), Hydrogen (H) and Oxygen (O), the highest crystal size on XRD is 43.20800529 nm, and particle size the best SEM was obtained at GO 250˚C with a particle size of 65.701671 nm where the larger the particle size, the larger the surface pores of the sample, so that the better microwave absorbent was produced.
Co-Authors Ratnawulan . Rika Nanda rizka fauziah Yenni Darvina