DEVELOPMENT OF CONTACT ANGLE MEASUREMENT SYSTEM FOR LIQUID-LIQUID-SOLID AND LIQUID-GAS-SOLID SYSTEMS

• Main Author: Hidayati, Ermas
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/83514
• Institution: Institut Teknologi Bandung

Determining the contact angle is crucial to discern whether a liquid exhibits wetting or non-wetting characteristics on a particular surface. Understanding the contact angle properties aids in identifying the wettability of oil in rock formations, which is beneficial for Enhanced Oil Recovery (EOR) methods. In this study, contact angle measurements were conducted in liquid-liquid-solid systems (frying oil-water-glass) and liquid-gas-solid systems (water-air-plastic and water-air-wood). Contact angle measurements were performed using two methods: the theta/2 method and the tangent line method. Subsequently, a comparison of contact angle values was made by calculating the percentage difference between these two methods. It was found that variations in frying oil-water glass exhibited the largest percentage difference compared to water-air plastic and water-air wood. This discrepancy may be attributed to poor image quality affecting binary image processing in the tangent line method. Additionally, other factors include misalignment of measurement scale positions and liquid droplet placement. From this research, it was also observed that the contact angle of frying oil is non-wetting on glass surfaces, whereas the contact angle of water is wetting on plastic and wood surfaces in an open-air environment.