Analisis Pengaruh Variasi Tegangan dan Waktu Proses Electrophoretic Deposition terhadap Lapisan Ha-Sr pada Substrat Ti-6Al-4V

Bagaskara, Rafalla Krisna (2026) Analisis Pengaruh Variasi Tegangan dan Waktu Proses Electrophoretic Deposition terhadap Lapisan Ha-Sr pada Substrat Ti-6Al-4V. Other thesis, Insitut Teknologi Sepuluh Nopember.

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Abstract

Ti-6Al-4V merupakan paduan titanium yang paling banyak digunakan untuk implan tulang karena sifat mekaniknya unggul dibanding logam lain. Namun, sifatnya yang bioinert membatasi kemampuan alami untuk merangsang pertumbuhan tulang baru. Sehingga, diperlukan pelapisan hidroksiapatit (HA) dan Sr untuk meningkatkan biokompatibilitas dan bioaktivitas. Penelitian ini mengevaluasi pengaruh variasi tegangan dan waktu deposisi pada proses electrophoretic deposition (EPD) terhadap pembentukan lapisan hidroksiapatit stronsium (HA–Sr) pada substrat Ti-6Al-4V, termasuk karakteristik lapisan dan respon biokompatibilitas in vitro. Tujuannya adalah menentukan kondisi EPD (tegangan dan waktu deposisi) yang menghasilkan lapisan HA–Sr paling optimal pada Ti-6Al-4V berdasarkan pembentukan lapisan dan respons sel osteoblas. Lapisan HA–Sr dideposisikan pada substrat Ti 6Al-4V menggunakan metode EPD dengan variasi tegangan 30 V, 60 V, dan 100 V serta waktu deposisi 2, 3, dan 4 menit. Variasi parameter deposisi digunakan untuk mengendalikan massa dan homogenitas lapisan yang terbentuk. Sampel kemudian diuji dengan gravimetri, SEMEDX dan cross-section untuk morfologi/ketebalan serta rasio Ca/P, dan uji MTT untuk biokompatibilitas in vitro. Massa deposit meningkat seiring kenaikan tegangan dan massa tertinggi diperoleh pada waktu deposisi 4 menit, yaitu 0,00691 mg/mm² (30 V), 0,01487 mg/mm² (60 V), dan 0,01703 mg/mm² (100 V). Lapisan paling merata terbentuk pada 60 V selama 4 menit dengan rasio Ca/P 1,46 dan ketebalan rata-rata 4,65 µm. Kondisi 60 V selama 4 menit juga menghasilkan respons sel osteoblas terbaik dengan viabilitas 65,53 ± 0,23%. Hasil ini menegaskan bahwa kondisi optimal tidak hanya dipengaruhi komposisi kimia (rasio Ca/P dan keberadaan Sr), tetapi juga karakteristik fisik permukaan terutama homogenitas dan distribusi lapisan HA–Sr.
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Ti-6Al-4V is the most widely used titanium alloy for bone implants due to its superior mechanical properties compared to other metals. However, its bioinert properties limit its natural ability to stimulate new bone growth. Therefore, hydroxyapatite (HA) and Sr coating is needed to improve biocompatibility and bioactivity. This study evaluates the effect of variations in voltage and deposition time in the electrophoretic deposition (EPD) process on the formation of hydroxyapatite-strontium (HA-Sr) coatings on Ti-6Al-4V substrates, including coating characteristics and in vitro biocompatibility responses. The objective is to determine the EPD conditions (voltage and deposition time) that produce the most optimal HA–Sr layer on Ti-6Al 4V based on layer formation and osteoblast cell response. The HA–Sr layer was deposited on the Ti-6Al-4V substrate using the EPD method with variations in voltage of 30 V, 60 V, and 100 V and deposition times of 2, 3, and 4 minutes. Variations in deposition parameters were used to control the mass and homogeneity of the formed layer. The samples were then tested using gravimetry, SEM–EDX and cross-section for morphology/thickness and Ca/P ratio, and MTT assay for in vitro biocompatibility. The deposit mass increased with increasing voltage, and the highest mass was obtained at a deposition time of 4 minutes, namely 0.00691 mg/mm² (30 V), 0.01487 mg/mm² (60 V), and 0.01703 mg/mm² (100 V). The most uniform layer was formed at 60 V for 4 minutes with a Ca/P ratio of 1.46 and an average thickness of 4.65 µm. The 60 V for 4 minutes condition also produced the best osteoblast cell response with a viability of 65.53 ± 0.23%. These results confirm that optimal conditions are not only influenced by chemical composition (Ca/P ratio and Sr presence), but also by physical surface characteristics, particularly the homogeneity and distribution of the HA–Sr layer.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Biomaterial, EPD, Pelapisan, PEO, Titanium Biomaterial, Coating, EPD, Implant, PEO, Titanium
Subjects:	Q Science Q Science > QD Chemistry > QD553 Electrochemistry. Electrolysis Q Science > QD Chemistry > QD63.O9 Electrolytic oxidation.
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Industrial Engineering > 26201-(S1) Undergraduate Thesis
Depositing User:	Rafallah Krisna Bagaskara
Date Deposited:	26 Jan 2026 01:06
Last Modified:	26 Jan 2026 02:17
URI:	http://repository.its.ac.id/id/eprint/130407

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