Fractal Characteristics of the Microstructures of Three Hydrophobic Surfaces with Steel Substrate and Their Effects on Wettability †

doi:10.7503/cjcu20200050

Chem. J. Chinese Universities ›› 2020, Vol. 41 ›› Issue (6): 1313.doi: 10.7503/cjcu20200050

• Physical Chemistry • Previous Articles Next Articles

Fractal Characteristics of the Microstructures of Three Hydrophobic Surfaces with Steel Substrate and Their Effects on Wettability ^†

JIANG Huayi^1,²,LIU Mei¹,QI Hongyuan^1,^2,^*(),LIANG Aiguo³,WANG Yulong^1,⁴,SUN Nana^1,²,WU Zhe¹

^1. College of Petroleum Engineering, Xi'an Shiyou University, Xi’an 710065, China
^2. Shaanxi Key Laboratory of Advanced Stimulation Technology for Oil & Gas Reservoirs, Xi'an Shiyou University, Xi’an 710065, China
^3. Karamay Hongshan Oilfield Co. Ltd., Karamay 834000, China
^4. School of Energy and Power Engineering, Xi'an Jiaotong University, Xi’an 710049, China

Received:2020-01-22 Online:2020-06-10 Published:2020-04-05
Contact: Hongyuan QI E-mail:hyqi@xsyu.edu.cn
Supported by:
† Natural Science Basic Research Program of Shaanxi Province, China(2019JQ-819);Natural Science Basic Research Program of Shaanxi Province, China(2018JQ5206);National Natural Science Foundation of China(51904246);Project on Cultivation of Graduate Innovation and Practice Ability of Xi'an Shiyou University, China(YCS19212043);Project on Cultivation of Graduate Innovation and Practice Ability of Xi'an Shiyou University, China(YCS19212041)

Abstract

Abstract:

The microstructures on 304 stainless steel, X80 pipeline steel and 45# steel surfaces were prepared at different etching times by using the chemical etching and modification with low-surface-energy material. The microstructures and wettabilities of different material surfaces were obtained by a scanning electronic microscope and a contact angle meter, respectively. The fractal parameters were calculated by Matlab software. The results showed that the hydrophobic surfaces prepared on three materials had fractal characteristics. The optimal etching time was 30 min. At that time, the maximum subset of multifractal spectrum was close to the leftmost, the corresponding singularity index was the smallest, and the fractal dimension also reached the maximum. The linear fitting results of fractal dimension and contact angle was good. The contact angle increased with the increase of fractal dimension.

Key words: Microstructure, Fractal dimension, Multifractal spectrum, Contact angle, Wettability

CLC Number:

O647

TrendMD:

JIANG Huayi,LIU Mei,QI Hongyuan,LIANG Aiguo,WANG Yulong,SUN Nana,WU Zhe. Fractal Characteristics of the Microstructures of Three Hydrophobic Surfaces with Steel Substrate and Their Effects on Wettability ^†[J]. Chem. J. Chinese Universities, 2020, 41(6): 1313.

Figures/Tables 6

References 26

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Material	D
Material	20 min	30 min	40 min	50 min	60 min
45# Steel	2.0431	2.0645	2.0555	2.0490	2.0496
X80 Pipeline steel	2.0571	2.0706	2.0613	2.0591	2.0550
304 Stainless steel	2.0648	2.0722	2.0654	2.0498	2.0614

Material	D
Material	20 min	30 min	40 min	50 min	60 min
45# Steel	2.0431	2.0645	2.0555	2.0490	2.0496
X80 Pipeline steel	2.0571	2.0706	2.0613	2.0591	2.0550
304 Stainless steel	2.0648	2.0722	2.0654	2.0498	2.0614

Fractal Characteristics of the Microstructures of Three Hydrophobic Surfaces with Steel Substrate and Their Effects on Wettability ^†

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