Irwanto, Mochammad Lukman Tri (2026) Pengembangan Medium Plastic Optical Fiber berbasis Komposit Polimer Polymethyl Methacrylate (PMMA)-Polyvinil Alcohol (PVA) Sebagai Sensor Deteksi Logam Berat Timbal (Pb2+) Dalam Air. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Pencemaran ion timbal (Pb²⁺) menjadi salah satu permasalahan lingkungan yang memerlukan metode deteksi yang cepat, akurat, dan ekonomis. Penelitian ini bertujuan mengembangkan komposit Polymethyl Methacrylate (PMMA)/Polyvinyl Alcohol (PVA) sebagai material sensitif pada sensor serat optik berbasis Plastic Optical Fiber (POF) untuk deteksi ion Pb²⁺. Komposit difabrikasi menggunakan metode solution blending dan solvent casting dengan variasi komposisi PMMA/PVA sebesar 100:0, 95:5, 90:10, 85:15, dan 80:20 (% berat). Karakterisasi dilakukan menggunakan UV-Vis, FTIR, dan SEM, sedangkan performa sensor dievaluasi melalui pengujian transmisi menggunakan konfigurasi U-bending. Hasil karakterisasi menunjukkan bahwa penambahan PVA memengaruhi sifat optik, interaksi antarmolekul, dan morfologi komposit, sehingga meningkatkan interaksi medan evanesen dengan ion Pb²⁺. Berdasarkan pengujian performa, komposisi 90% PMMA–10% PVA memberikan hasil terbaik dengan sensitivitas 1,153 dB/ppm, linearitas 0,962, LOD 1,182 ppm, dan LOQ 3,582 ppm. Hasil penelitian menunjukkan bahwa komposit PMMA/PVA 90:10 berpotensi sebagai material sensitif untuk sensor serat optik dalam pemantauan pencemaran logam berat.
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Lead ion (Pb²⁺) contamination is a major environmental issue that requires rapid, accurate, and cost-effective detection methods. This study aims to develop a Polymethyl Methacrylate (PMMA)/Polyvinyl Alcohol (PVA) composite as a sensitive material for a Plastic Optical Fiber (POF)-based optical fiber sensor for Pb²⁺ detection. The composites were fabricated using the solution blending and solvent casting methods with PMMA/PVA weight ratios of 100:0, 95:5, 90:10, 85:15, and 80:20. Material characterization was carried out using UV–Vis spectroscopy, FTIR, and SEM, while sensor performance was evaluated through transmission measurements using a U-bending configuration. The results showed that the addition of PVA altered the optical properties, intermolecular interactions, and surface morphology of the composites, thereby enhancing the evanescent field interaction with Pb²⁺ ions. Among all compositions, the 90% PMMA–10% PVA composite exhibited the best sensing performance, with a sensitivity of 1.153 dB/ppm, a linearity of 0.962, a limit of detection (LOD) of 1.182 ppm, and a limit of quantification (LOQ) of 3.582 ppm. These results demonstrate that the PMMA/PVA (90:10) composite is a promising sensitive material for POF-based optical fiber sensors in heavy metal monitoring.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | SDGs, PMMA/PVA, Plastic Optical Fiber, sensor serat optik, ion timbal |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA1800 Fiber Optics T Technology > TA Engineering (General). Civil engineering (General) > TA418.16 Materials--Testing. T Technology > TA Engineering (General). Civil engineering (General) > TA418.9 Composite materials. Laminated materials. |
| Divisions: | Faculty of Industrial Technology > Physics Engineering > 30201-(S1) Undergraduate Thesis |
| Depositing User: | Mochammad Lukman Tri Irwanto |
| Date Deposited: | 04 Aug 2026 02:22 |
| Last Modified: | 04 Aug 2026 02:22 |
| URI: | http://repository.its.ac.id/id/eprint/142678 |
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