Studi Modifikasi Permukaan Polietilena Tereftalat (PET) Melalui Penyinaran UV dan Aminasi Sebagai Tahap Awal Fabrikasi Elektroda Tipis Emas

Hadi, Febri (2026) Studi Modifikasi Permukaan Polietilena Tereftalat (PET) Melalui Penyinaran UV dan Aminasi Sebagai Tahap Awal Fabrikasi Elektroda Tipis Emas. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Penelitian ini mempelajari modifikasi permukaan polietilena tereftalat (PET) melalui penyinaran ultraviolet (UV) dan proses aminasi sebagai tahap awal pengembangan elektroda tipis emas berbasis PET. Substrat PET (3 cm × 1 cm) dibersihkan menggunakan akuades dan metanol, kemudian disinari UV (254 nm) selama 4 jam dan diaminiasi menggunakan larutan aminasi yang mengandung etilendiamin, buffer pH 7, dan EDC-HCl selama 3 jam. Pelapisan emas dilakukan menggunakan metode electroless plating melalui tahapan aktivasi dengan HAuCl4, reduksi menggunakan NaBH4, perlakuan KSCN, dan deposisi menggunakan larutan kompleks Au-sulfit. Evaluasi perubahan gugus fungsi dilakukan menggunakan FTIR pada rentang 650–4000 cm-1 dengan resolusi 4 cm-1 untuk PET tanpa perlakuan, PET setelah UV, dan PET setelah aminasi. Hasil FTIR menunjukkan pita khas PET tetap teramati pada seluruh sampel, terutama pita regangan C=O ester pada sekitar 1710–1740 cm-1 serta pita C–O–C pada sekitar 1240–1100 cm-1, yang menandakan struktur dasar PET masih dipertahankan. Sampel setelah UV menunjukkan perubahan intensitas relatif pada beberapa daerah bilangan gelombang yang mengindikasikan aktivasi awal permukaan, sedangkan perubahan lebih jelas teramati setelah aminasi, ditandai pita pada 3200–3600 cm-1 yang diinterpretasikan sebagai vibrasi regangan N–H serta perubahan intensitas pada rentang 1500–1700 cm-1 dan wilayah fingerprint. Secara keseluruhan, modifikasi permukaan melalui UV dan aminasi menghasilkan perubahan bertahap pada permukaan PET sebagai dasar menuju tahapan fabrikasi elektroda tipis emas berbasis PET.
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This study investigates surface modification of polyethylene terephthalate (PET) through ultraviolet (UV) irradiation and amination as an initial step toward the development of PET-based thin-film gold electrodes. PET substrates (3 cm × 1 cm) were cleaned using distilled water and methanol, followed by UV irradiation (254 nm) for 4 hours and amination using an amination solution containing ethylenediamine, pH 7 buffer, and EDC-HCl for 3 hours. Gold coating was performed using an electroless plating approach through sequential activation with HAuCl4, reduction with NaBH4, KSCN treatment, and deposition using a gold sulfite complex solution. Functional group changes were evaluated using FTIR in the range of 650–4000 cm-1 with a resolution of 4 cm-1 for untreated PET, UV-treated PET, and aminated PET. The FTIR results indicated that characteristic PET bands remained observable in all samples, particularly the ester C=O stretching band at around 1710–1740 cm-1 and the C–O–C band at approximately 1240–1100 cm-1, suggesting that the main PET structure was preserved. UV treated PET showed relative intensity changes in several wavenumber regions, indicating initial surface activation. More pronounced changes were observed after amination, characterized by a band in the 3200–3600 cm-1 region attributed to N–H stretching vibrations, along with relative intensity changes in the 1500–1700 cm-1 region and part of the fingerprint region. Overall, UV irradiation and amination induced gradual surface changes on PET, providing a basis for further development of PET-based thin-film gold electrode fabrication.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	PET, penyinaran UV, aminasi, FTIR, modifikasi permukaan, electroless plating, PET, UV irradiation, amination, FTIR, surface modification, electroless plating
Subjects:	Q Science > QD Chemistry > QD553 Electrochemistry. Electrolysis
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Chemistry > 47101-(S2) Master Thesis
Depositing User:	Febri Hadi
Date Deposited:	02 Feb 2026 03:14
Last Modified:	02 Feb 2026 03:14
URI:	http://repository.its.ac.id/id/eprint/131653

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