Safitri, Lilis (2025) Sintesis dan Karakterisasi Material Komposit Polycaprolactone (PCL) Diperkuat Benang Serat Rami dengan Perlakuan Alkalisasi dan Silane untuk Filamen 3D Printing. Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Polycaprolactone (PCL) merupakan filamen 3D printing ramah lingkungan karena sifatmya mudah terurai, tetapi memiliki nilai mechanical properties yang rendah. Penelitian ini bertujuan untuk meningkatkan sifat mekanik filamen PCL melalui penambahan serat rami continuous yang telah dimodifikasi secara kimia. Modifikasi dilakukan menggunakan perlakuan alkalisasi (NaOH 5%), silane (APTES 1% dan 3%) dan sinergi kombinasi keduanya. Serat rami dan komposit filamen dikarakterisasi melalui beberapa pengujian dengan pengukuran densitas dan diameter serat untuk mengetahui sifat fisik, pengujian XRD untuk menganalisa perubahan fasa, FTIR untuk mengidentifikasi gugus fungsi, TGA untuk mengidentifikasi temperature degradasi serat rami, SEM untuk mengetahui morfologi serat dan fracture filamen, uji tarik untuk mengetahui sifat mekanik dan uji pull out untuk mengukur kekuatan adhesi antar serat dan matriks, DMA untuk mengevaluasi sifat viskoelastik filamen. Hasilnya menunjukkan bahwa perlakuan kimia berpengaruh signifikan terhadap sifat mekanik filamen. Perlakuan silane meningkatkan kekakuan (stiffness) namun membuat filamen lebih getas disebabkan oleh jarak antar kristal lebih sempit dari 1.92 Å menjadi 1.87 Å dan crystallite size crystallite size yang membesar dari 11,7 nm menjadi 14,5 nm, namun proporsi amorf lebih dominan sehingga nilai kekuatan tarik maksimum (UTS) mencapai 107.86 MPa dan strain sebesar 1,28%. Sebaliknya, perlakuan alkalisasi menghasilkan filamen lebih ulet (ductile) dengan nilai UTS 73,03 MPa dan strain 6,79%. Kombinasi alkalisasi dan silane menghasilkan performa lebih unggul dengan nilai UTS 109.44 MPa dan strain 8,72% menunjukkan sinergi perlakuan mampu meningkatkan stiffness dan durability.
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Polycaprolactone (PCL) is a biodegradable and sustainable 3D printing filament. However, the limitations of PCL include its low modulus and tensile strength. This study aimed to enhanced mechanical properties of PCL by reinforcement with continous ramie yarn fibers. The ramie fibers were treated with different chemical treatment was performed by alkali treatment using sodium hydroxide (5% NaOH), silane treatment using three-aminopropyl triethoxy silane (1% and 3% APTES), and a synergistic combination of both treatments. Ramie fibers and composite filaments were characterized through various tests, including density and fiber diameter measurements to evaluate physical properties, XRD to analyze phase changes, FTIR to identify functional groups, TGA to determine the thermal degradation behavior of fibers, SEM to observe fiber morphology through surface roughness, tensile tests to evaluate mechanical properties, pull-out tests to measure interfacial adhesion strength between fiber and matrix, and DMA to assess viscoelastic mechanical behavior of the filaments. The results show that chemical treatments significantly influence the mechanical performance of the filaments. Silane treatment enhanced stiffness but led to a more brittle behavior, as evidenced by a narrower interplanar spacing start from 1.92 Å to 1.87 Å and an increase in crystallite size from 11.7 nm to 14.5 nm, resulting in a maximum tensile strength (UTS) of 107.86 MPa and a strain of 1.28% with a maximum tensile strength (UTS) of 107.86 MPa and strain of 1.28%. In contrast, alkali treatment produced a more ductile filament with a UTS of 73.03 MPa and a strain of 6.79%. The combination of NaOH and APTES treatments yielded the highest performance, with a UTS of 109.44 MPa and a strain of 8.72%, indicating enhanced stiffness and durability.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | Kata kunci: Surface modification, 3D Printing, Ramie fiber, Sustainable, Composite filament |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA418.9 Composite materials. Laminated materials. |
| Divisions: | Faculty of Industrial Technology > Mechanical Engineering > 21101-(S2) Master Thesis |
| Depositing User: | Lilis Safitri |
| Date Deposited: | 04 Aug 2025 07:08 |
| Last Modified: | 04 Aug 2025 07:08 |
| URI: | http://repository.its.ac.id/id/eprint/126079 |
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