Contact Angle Prediction Model for Underwater Oleophobic Surfaces Based on Multifractal Theory  

作　　者：Jiang Huayi You Yanzhen Hu Juan Tian Dongmei Qi Hongyuan Sun Nana Liu Mei 

机构地区：[1]College of Petroleum Engineering,Xi’an Shiyou University,Xi’an 710065,Shaanxi,China [2]Shaanxi Key Laboratory of Advanced Stimulation Technology for Oil&Gas Reservoirs,Xi’an Shiyou University,Xi’an 710065,Shaanxi,China [3]The Second Gas Production Plant,Changqing Oilfield Company,Yulin 719000,Shaanxi,China

出　　处：《China Petroleum Processing & Petrochemical Technology》2023年第3期37-48,共12页中国炼油与石油化工（英文版）

基　　金：the Natural Science Basic Research Program of Shaanxi(Program No.2023-JC-YB-351);the Scientific Research Program Funded by the Shaanxi Provincial Education Department(Program No.20JS118);the Xi’an Shiyou University Graduate Innovation and Practice Ability Training Plan(YCS21212097,YCS21212092).

摘　　要：Traditional microstructure scale parameters have difficulty describing the structure and distribution of a roughmaterial’s surface morphology comprehensively and quantitatively. This study constructs hydrophilic and underwateroleophobic surfaces based on polyvinylidene fluoride (PVDF) using a chemical modification method, and the fractaldimension and multifractal spectrum are used to quantitatively characterize the microscopic morphology. A new contactangle prediction model for underwater oleophobic surfaces is established. The results show that the fractal dimension ofthe PVDF surface first increases and then decreases with the reaction time. The uniformity characterized by the multifractalspectrum was generally consistent with scanning electron microscope observations. The contact angle of water droplets onthe PVDF surface is negatively correlated with the fractal dimension, and oil droplets in water are positively correlated.When the fractal dimension is 2.0975, the new contact angle prediction model has higher prediction accuracy. Themaximum and minimum relative deviations of the contact angle between the theoretical and measured data are 18.20%and 0.72%, respectively. For water ring transportation, the larger the fractal dimension and spectral width of the materialsurface, the smaller the absolute value of the spectral difference, the stronger the hydrophilic and oleophobic properties, andthe better the water ring transportation stability.

关 键 词：contact angle hydrophilic-oleophobic surface polyvinylidene fluoride MULTIFRACTAL prediction model 

分 类 号：TB306[一般工业技术—材料科学与工程]