稠油流量监测涡轮表面超双疏涂层的构筑与性能研究

doi:10.3969/j.issn.1001-1803.2021.12.003

Abstract

Abstract:

The water and oil super-phobic coating precursor with a micro-nano structure was produced by adding structure control agents to the substrate which was composed of the hydrolysis products of ethyl orthosilicate and fluorinated decyl trimethoxysilane, and after spraying and curing, a coating with water and oil super-phobicity could be formed. Using highly fluorinated silicon materials and surface microstructure control agents, the wettability of the solid surface has been controlled by changing the surface free energy and surface morphology. The effects of the type and content of structure control agents and the spraying conditions （spraying volume, substrate temperature, and spraying distance） on the properties of the coatings were investigated. The silica nanotubes made by ourselves with natural halloysite （nanotube）, sepiolite （nanofilament） and montmorillonite （nanoflake） were selected as microstructure control fillers. The experimental results showed that the water and oil super-phobic coating with the best performance was prepared by using fibrous silica nanotubes as the microstructure control filler. By adding 5 g/L of silica nanotubes to the fluorosilicone polymer, the coating obtained could significantly increase the contact angle of heavy oil and decrease the roll angle of heavy oil. Increasing the mass concentration of silica nanotubes to 15 and 20 g/L had no significant effect on the surface microstructure and water and oil super-phobicity. During its formation, a large number of Si-Si bonds formed and the coating could be used for a long time at 160 ℃ and was not subject to salt corrosion. The optimal spraying conditions were silica nanotube mass concentration of 10 g/L, spraying volume of 10 mL, substrate temperature of 150 ℃, and spraying distance of 6 cm. The turbine coated with the water and oil super-phobic material could meet the speed measurement requirements under thick oil conditions, ensuring the normal operation of the turbine flowmeter in the monitoring and development of thick oil and solving the problem of thick oil sticking to the turbine.

Key words: amphiphobic coating, heavy oil adhesion, turbine surface, ethyl orthosilicate, perfluorinated silane, silica nanotube

CLC Number:

TE357.46

Song Hai,Zhang Menghua,An Peng,Wu Yuanpeng. Study on the preparation and performance of water and oil super-phobic coating on the surface of the turbine for monitoring the flow of heavy oil[J].China Surfactant Detergent & Cosmetics, 2021, 51(12): 1179-1185.

Figures/Tables 11

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References 17

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填料	CA_n_-decane/（°）	SA_n_-decane/（°）
二氧化硅纳米管	152.0±0.8	9.1±1.2
海泡石	151.3±0.9	38±2.6
埃洛石	150.5±1.8	—
蒙脱石	128.4±2.3	—

液体	CA/（°）	SA/（°）	表面张力/ （mN·m^-1）	黏度/（Pa·s）
水	166.6	1.0	72.4	0.001
癸烷	155.3	9.1	23.1	0.001
甘油	161.7	1.3	64.1	0.9
稠油	154.6	7.6	42.8	24

Study on the preparation and performance of water and oil super-phobic coating on the surface of the turbine for monitoring the flow of heavy oil

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