Text

Analisis Pengaruh Salinitas Brine terhadap Stabilitas Nanofluida GONs dan GONs yang Dimodifikasi dengan Polimer untuk Aplikasi Nano-EOR

---

anofluida berpotensi meningkatkan perolehan minyak karena kemampuannya menembus pori-pori kecil batuan. Salah satu nanofluida yang banyak diteliti untuk aplikasi ini adalah Graphene Oxide Nanosheets (GONs). Selama proses injeksi ke dalam reservoir, nanofluida memerlukan waktu untuk mencapai zona target dan mulai memobilisasi minyak dalam kondisi tetap terdispersi merata. Namun, perbedaan salinitas menyebabkan nanofluida cenderung mengalami aglomerasi dan penurunan sifat fungsional. Penelitian ini bertujuan untuk menganalisis karakterisasi dan stabilitas GONs serta GONs–Hydrolyzed Polyacrylamide (HPAM) pada variasi konsentrasi salinitas. GONs disintesis menggunakan metode Hummers dan dimodifikasi permukaannya dengan HPAM. Selanjutnya, stabilitas nanofluida GONs dan GONs–HPAM diuji melalui observasi visual dan zeta potential pada konsentrasi brine 5000 ppm, 10000 ppm, dan 15000 ppm. Hasil XRD menunjukkan GONs memiliki puncak utama pada 12.33º, sedangkan GONs–HPAM menjadi lebih amorf dengan puncak utama bergeser ke 10.48º. SEM memperlihatkan morfologi GONs berupa lembaran berlipat dan tidak merata, sementara GONs–HPAM tampak lebih padat dan teratur. FTIR mengidentifikasi pergeseran pita serapan –OH dari 3466.23 cm-1 menjadi 3493.46 cm-1 dan munculnya gugus –CONH2. UV-Vis menunjukkan pergeseran puncak serapan dari 225 nm menjadi 232 nm. Pada menit ke-60, GONs menunjukkan peningkatan stabilitas dispersi seiring peningkatan salinitas, dengan endapan paling sedikit pada 15000 ppm dan nilai zeta potential -0.32 mV, -0.50 mV, serta -0.71 mV. Sementara itu, GONs–HPAM mengalami penurunan stabilitas dispersi dengan endapan paling sedikit pada 5000 ppm, serta nilai zeta potential -3.2 mV, -0.66 mV dan -0.12 mV. Keberadaan ion Na+ mempengaruhi stabilitas nanofluida melalui interaksi elektrostatik, sementara penambahan –OH dari HPAM menghasilkan kestabilan GONs–HPAM yang lebih baik, bahkan dibandingkan GONs pada salinitas tertinggi.
Abstrak English
Nanofluids have significant potential to enhance oil recovery due to their ability to penetrate small rock pores. One of the most studied nanofluids for this application is Graphene Oxide Nanosheets (GONs). During the injection process into the reservoir, nanofluids require time to reach the target zone and mobilize trapped oil while remaining well-dispersed. However, variations in salinity tend to cause nanofluids to agglomerate and reduce their functional properties. This study aims to analyze the characterization and stability of GONs and GONs–Hydrolyzed Polyacrylamide (HPAM) at different brine concentrations. GONs were synthesized using the Hummers method and further modified on the surface with HPAM. The stability of GONs and GONs–HPAM nanofluids was then tested through visual observation and zeta potential analysis at brine concentrations of 5000 ppm, 10000 ppm, and 15000 ppm. XRD results showed that GONs had a main diffraction peak at 12.33º, while GONs–HPAM became more amorphous with the main peak shifted to 10.48º. SEM analysis revealed that GONs exhibited folded nanosheet morphology, while GONs–HPAM showed a smoother and more compact surface structure. FTIR identified a shift in the –OH absorption band from 3466.23 cm-1 to 3493.46 cm-1, with the appearance of the –CONH2 group. UV-Vis spectroscopy showed a bathochromic shift from 225 nm to 232 nm. At 60 minutes, GON showed an increase in dispersion stability with increasing salinity, showed the least sedimentation at 15000 ppm and zeta potential values of -0.32 mV, -0.50 mV, and -0.71 mV. Meanwhile, GONs–HPAM showed a decrease in dispersion stability, with the least sedimentation observed at 5000 ppm, and zeta potential values of -3.2 mV, -0.66 mV, and -0.12 mV. The presence of Na+ ions affects nanofluid stability through electrostatic interactions, while the addition of –OH from HPAM results in better stability of GONs–HPAM, even compared to GONs at the highest salinity.

---

Availability

Detail Information

Call Number

Perminyakan

Language

Indonesia

NPM

213210140

Publisher

Perminyakan : Universitas Islam Riau., 2025

Keyword(s)

Hydrolyzed Polyacrylamide
raphene Oxide Nanosheets
Salinitas Brine

Other Information

Petugas

Ayu Agustina

Other version/related

File Attachment

Comments

---

You must be logged in to post a comment