Adinata, Fauzan Mahsa (2025) Analisis Pengaruh Variasi Persentase BaTiO3 Terhadap Morfologi dan Sifat Tarik Pada Komposit tBA/BaTiO3/CNT untuk Aplikasi Printable Wearable Device dengan Metode Digital Light Processing. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Penelitian ini bertujuan untuk mengevaluasi pengaruh variasi konsentrasi Barium Titanate (BaTiO₃) terhadap morfologi dan sifat mekanik komposit berbasis tert-Butyl Acrylate (tBA), Carbon Nanotube (CNT), dan dispersan BYK-111, yang difabrikasi menggunakan metode Digital Light Processing (DLP). Formulasi resin disintesis dengan konsentrasi BaTiO₃ sebesar 0%, 20%, 40%, dan 60% berat, dengan tambahan 0,1% CNT dan 15% BYK-111. Penelitian ini mencakup pengujian sedimentasi, curing depth, FTIR, XRD, SEM, dan uji tarik ASTM D882 untuk menilai kestabilan dispersi, perubahan struktur kimia, kristalinitas, morfologi mikro, serta kekuatan mekanik dari setiap variasi. Hasil pengujian menunjukkan bahwa persentase sedimentasi meningkat signifikan seiring bertambahnya konsentrasi BaTiO₃, dari 2% (0% BTO) hingga mencapai 90% (60% BTO), menandakan batas efektif kinerja dispersan pada konsentrasi tinggi. Curing depth mengalami penurunan dari 300 µm pada 0% BTO menjadi hanya 220 µm pada 60% BTO, menunjukkan efek scattering cahaya UV oleh partikel keramik. Hasil FTIR mengidentifikasi gugus fungsi utama seperti C=O (1721 cm⁻¹), C–O (1252 cm⁻¹), dan M–O (568 cm⁻¹), serta menunjukkan keberadaan intensitas gugus –OH pada konsentrasi tinggi BTO, yang mengindikasikan interaksi fisik antar fasa. Analisis XRD mengonfirmasi keberadaan fasa kristalin tetragonal BaTiO₃, dengan peningkatan intensitas puncak pada 2θ ≈ 31° seiring penambahan filler. Data SEM memperlihatkan aglomerasi partikel BTO dan munculnya void mikro mulai dari variasi 20%, yang semakin parah pada 60%, menyebabkan penurunan homogenitas dan potensi inisiasi retak. Secara mekanik, nilai Ultimate Tensile Strength (UTS) menurun dari 2,43 MPa (0% BTO) menjadi 1,66 MPa (60% BTO). Modulus Young juga menunjukkan tren penurunan, sedangkan elongation at break menurun drastis dari 10.19% menjadi 6.16%, mencerminkan peningkatan kerapuhan material. Kesimpulan dari studi ini adalah bahwa penambahan BTO dalam jumlah terbatas dapat meningkatkan performa fungsional komposit, namun penambahan berlebih menurunkan stabilitas dispersi dan sifat mekanik akibat aglomerasi dan penurunan efektivitas polimerisasi.
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This research investigates the effect of Barium Titanate (BaTiO₃) concentration variation on the morphology and mechanical properties of a composite based on tert-Butyl Acrylate (tBA), Carbon Nanotube (CNT), and BYK-111 dispersant, fabricated using the Digital Light Processing (DLP) method. The resin formulation was synthesized with BaTiO₃ concentrations of 0%, 20%, 40%, and 60% by weight, alongside 0.1 wt% CNT and 1.5 wt% BYK-111. The study includes sedimentation tests, curing depth measurements, FTIR, XRD, SEM analyses, and tensile testing (ASTM D882) to assess particle dispersion stability, chemical structure changes, crystallinity, microstructure morphology, and mechanical strength for each formulation. The results showed a significant increase in sedimentation percentage with higher BaTiO₃ content—from 2% at 0% BTO up to 90% at 60% BTO—indicating the limit of dispersant effectiveness. Curing depth decreased from 300 µm (0% BTO) to 220 µm (60% BTO), attributed to increased UV light scattering by ceramic particles. FTIR spectra confirmed the presence of major functional groups such as C=O (1721 cm⁻¹), C–O (1252 cm⁻¹), and M–O (568 cm⁻¹), with a notable reduction in –OH intensity at higher BTO content, suggesting chemical interactions between matrix and filler. XRD results confirmed the presence of tetragonal BaTiO₃ crystalline phases, with increasing peak intensity at 2θ ≈ 31° as BTO concentration increased. SEM analysis revealed early-stage agglomeration at 20% BTO, with severe particle clustering and void formation at 60%, resulting in poor homogeneity and potential crack initiation zones. Mechanically, the Ultimate Tensile Strength (UTS) decreased from 2.43 MPa (0% BTO) to 1.66 MPa (60% BTO), while Young’s Modulus and elongation at break also declined significantly—from 10.19% to 6.16%—indicating increased brittleness with higher filler content. The study concludes that while low BTO loading improves the functional performance of the composite, excessive addition impairs dispersion stability and mechanical integrity due to agglomeration and reduced curing efficiency.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Digital Light Processing, Barium Titanate, Carbon Nanotube, Komposit Polimer, Curing Depth, Printable Wearable Device |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA1573 Detectors. Sensors T Technology > TA Engineering (General). Civil engineering (General) > TA418.16 Materials--Testing. T Technology > TA Engineering (General). Civil engineering (General) > TA455 Carbon. Nanotubes. |
| Divisions: | Faculty of Industrial Technology > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis |
| Depositing User: | Fauzan Mahsa Adinata |
| Date Deposited: | 31 Jul 2025 06:07 |
| Last Modified: | 31 Jul 2025 06:07 |
| URI: | http://repository.its.ac.id/id/eprint/124168 |
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