Studi Pengaruh Penambahan Selulosa Sebagai Filler Terhadap Sifat Mekanik, Morfologi Dan Kestabilan Termal Komposit Selulosa/Poly (Ethylene Glycol)/Poly (Lactic Acid)

Santosa, Muhammad Bhakti (2018) Studi Pengaruh Penambahan Selulosa Sebagai Filler Terhadap Sifat Mekanik, Morfologi Dan Kestabilan Termal Komposit Selulosa/Poly (Ethylene Glycol)/Poly (Lactic Acid). Undergraduate thesis, Institut Teknologi Selupuluh Nopember.

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Abstract

Sampah plastik yang dihasilkan penduduk dunia pada tahun 2015 mencapai 6300 MT dimana 79% sampah tersebut mencemari lingkungan. Bahan plastik alternatif yang ramah lingkungan salah satunya adalah PLA . Sifat PLA yang getas dan kaku dapat diatasi dengan penambahan PEG, namun kekuatan tariknya menurun signifikan. Untuk menaikkan kekuatan mekanis di tambahkan selulosa dalam bentuk microcrsytaline cellulose. Komposit selulosa/PEG/PLA dibuat dengan pencampuran dalam temperatur 215 oC di atas hot plate lalu digunakan metode solution casting untuk membuat spesimen dengan variasi penambahan selulosa 0, 2, 4, 6, dan 8 wt%. Pengujian tarik, impact, kekerasan, FTIR, SEM, dan TGA dilakukan untuk mengetahui sifat mekanis, morfologi, dan kestabilan termal dari komposit selulosa/PEG/PLA. Hasil pengujian menunjukkan hasil paling baik untuk kekuatan tarik sebesar 4,55 MPa, regangan 3,8%, dan energi impact sebesar 2,3 Joule pada penambahan 6 wt% selulosa, morfologi komposit paling baik pada penambahan 6 wt% selulosa dengan tidak adanya aglomerasi partikel selulosa dalam matrix PLA, kestabilan termal paling baik diperoleh dengan penambahan 4 wt% selulosa dengan temperatur dekomposisi 246oC.================= Plastic waste generated by people around the world in 2015 reached 6300 MT where 79% of the plastic waste contaminates the environment., one of the alternatives is ecofriendly biodegradable PLA plastic. The brittle and rigid nature of the PLA can be fixed by adding PEG, but its tensile strength decrease significantly. Cellulose were added in the form of microcrystalline cellulose to increase its mechanical strength. The cellulose / PEG / PLA composite were made by mixing the materials at 215 oC above a hot plate and use solution casting method to create specimens with variations of 0, 2, 4, 6, and 8 wt% cellulose. Tensile, impact, hardness, FTIR, SEM, and TGA tests were performed to determine the mechanical properties, morphological, and thermal stability of cellulose / PEG / PLA composites. The test results showed the best mechanical properties with tensile strength 4.55 MPa, strain 3.8%, and impact energy 2.3 Joules for the addition of 6 wt% cellulose, composite morphology observed to be best at the addition of 6 wt% cellulose, proved by the absence of agglomeration of cellulose particles in the PLA matrix , thermal stability show best result with the addition of 4 wt% cellulose with decomposition temperature start at 246 oC

Item Type: Thesis (Undergraduate)
Additional Information: RSMt 668.411 San s-1
Uncontrolled Keywords: Poly(lactic acid), Poly(ethylene glycol), selulosa, microcrystalline cellulose, sifat mekanik, kestabilan termal, morfologi
Subjects: Q Science > QD Chemistry > QD320 Cellulose. Hydrolysis
T Technology > TA Engineering (General). Civil engineering (General) > TA418.9 Composite materials
T Technology > TP Chemical technology > TP1140 Polymers
Divisions: Faculty of Industrial Technology > Material & Metallurgical Engineering > (S1) Undergraduate Theses
Depositing User: Muhammad Bhakti Santosa
Date Deposited: 26 Dec 2018 03:30
Last Modified: 26 Dec 2018 03:30
URI: http://repository.its.ac.id/id/eprint/53168

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