Yudha, Evan (2026) Analisis Pengaruh Variasi Konsentrasi TEOS Terhadap Morfologi Hollow Silica Sphere Hasil Sintesis Sol–Gel Soft-Template Serta Aplikasinya Untuk 3D Manufaktur Stereolithography (SLA) Komposit Resin UV. Other thesis, Institut teknologi sepuluh Nopember.
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Abstract
Hollow Silica Sphere (HSS) merupakan material silika berongga yang memiliki densitas rendah, luas permukaan tinggi, serta berpotensi meningkatkan sifat mekanik material komposit. Penelitian ini bertujuan menganalisis pengaruh variasi konsentrasi tetraethyl orthosilicate (TEOS) terhadap morfologi dan ukuran HSS hasil sintesis metode sol–gel soft-template menggunakan cetyltrimethylammonium bromide (CTAB), serta mengevaluasi pengaruhnya sebagai filler pada komposit UV resin untuk proses manufaktur aditif berbasis Stereolithography (SLA). Variasi rasio molar yang digunakan adalah 1CTAB:2TEOS, 1CTAB:4TEOS, 1CTAB:6TEOS, dan 1CTAB:8TEOS. Karakterisasi HSS dilakukan menggunakan Scanning Electron Microscope (SEM), X-Ray Diffraction (XRD), dan Fourier Transform Infrared Spectroscopy (FTIR). Komposit kemudian diuji meliputi sifat tarik (ASTM D638), lentur (ASTM D790), kekerasan Shore D, densitas, dan viskositas. Hasil SEM menunjukkan bahwa peningkatan konsentrasi TEOS menghasilkan morfologi HSS yang tetap berbentuk sferis dengan peningkatan diameter rata-rata partikel dari 611,7 ± 44,2 nm menjadi 940,6 ± 53,6 nm, disertai kecenderungan aglomerasi yang lebih tinggi. Hasil XRD memperlihatkan puncak lebar pada 2θ sekitar 22,5° yang mengindikasikan struktur silika amorf, sedangkan spektrum FTIR mengonfirmasi terbentuknya jaringan siloksan (Si–O–Si). Penambahan HSS pada UV resin meningkatkan kekuatan tarik dari 38,19 MPa menjadi 43,33 MPa, modulus elastisitas dari 560,47 MPa menjadi 638,46 MPa, serta kekuatan lentur dari 619,70 MPa menjadi 770,74 MPa. Sebaliknya, penambahan dioctyl phthalate (DOP) meningkatkan regangan namun menurunkan kekuatan mekanik. Hasil penelitian menunjukkan bahwa HSS hasil sintesis berpotensi sebagai filler penguat yang efektif untuk meningkatkan performa komposit UV resin pada aplikasi pencetakan 3D berbasis SLA.
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Hollow Silica Spheres (HSS) are hollow silica materials characterized by low density, high specific surface area, and the potential to enhance the mechanical properties of composite materials. This study aims to investigate the effect of tetraethyl orthosilicate (TEOS) concentration variation on the morphology and particle size of HSS synthesized using the sol–gel soft-template method with cetyltrimethylammonium bromide (CTAB), as well as to evaluate their application as reinforcing fillers in UV resin composites for Stereolithography (SLA)-based additive manufacturing. The molar ratios employed were 1CTAB:2TEOS, 1CTAB:4TEOS, 1CTAB:6TEOS, and 1CTAB:8TEOS. The synthesized HSS particles were characterized using Scanning Electron Microscopy (SEM), X-ray Diffraction (XRD), and Fourier Transform Infrared Spectroscopy (FTIR). The fabricated composites were subsequently evaluated through tensile testing (ASTM D638), three-point bending testing (ASTM D790), Shore D hardness testing, density measurement, and viscosity analysis. SEM observations revealed that increasing the TEOS concentration maintained the spherical morphology of the HSS while increasing the average particle diameter from 611.7 ± 44.2 nm to 940.6 ± 53.6 nm, accompanied by a greater tendency toward particle agglomeration. XRD analysis exhibited a broad diffraction peak at approximately 22.5° (2θ), confirming the formation of amorphous silica, whereas FTIR spectra verified the successful formation of the siloxane (Si–O–Si) network. The incorporation of HSS into the UV resin improved the tensile strength from 38.19 MPa to 43.33 MPa, Young's modulus from 560.47 MPa to 638.46 MPa, and flexural strength from 619.70 MPa to 770.74 MPa. In contrast, the addition of dioctyl phthalate (DOP) increased the elongation at break while reducing the mechanical strength. These findings demonstrate that sol–gel synthesized HSS are promising reinforcing fillers for enhancing the mechanical performance of UV resin composites intended for SLA-based 3D printing applications.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | DOP, HSS, Komposit, Resin UV, SLA, Sol–Gel, TEOS |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA418.9 Composite materials. Laminated materials. |
| Divisions: | Faculty of Industrial Technology > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis |
| Depositing User: | Evan Yudha |
| Date Deposited: | 21 Jul 2026 04:48 |
| Last Modified: | 21 Jul 2026 04:48 |
| URI: | http://repository.its.ac.id/id/eprint/135672 |
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