Preparation and properties of epoxy semi-coated quartz sand proppant decorated with stearic acid functionalized TiO2 nanoparticles

IF 21.8 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES Advanced Composites and Hybrid Materials Pub Date : 2025-03-01 DOI:10.1007/s42114-025-01251-y

Jiang Guo, Jiajing Xie, Baoqiang Lv, Longqiao Hu, Yukun Sun, Yu Duan, Wenling Wu, Fujian Zhou, Jianfeng Zhu

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Abstract

In this work, the hydrophobic and oleophilic epoxy semi-coated quartz sand proppant decorated with stearic acid functionalized TiO₂ nanoparticles is successfully prepared. The unique semi-coated structure is characterized by SEM, SDF, and TEM. Compared with raw quartz sand proppant, the water contact angle of the epoxy semi-coated quartz sand proppant can even reach 141.6°, which is due to the rough surface and hydrophobic coating induced by semi-coated epoxy and hydrophobic stearic acid-modified TiO₂. Meanwhile, the water contact angle could be adjusted by controlling the weight content of quartz sand. Moreover, the semi-coated proppant can maintain its hydrophobicity after treated by boiling water for 4 h, indicating improved thermal stability. The physical properties including bulk density (1.44 g/cm³), apparent density (1.40 g/cm³), acid solubility (3.43%), and breakage rate (1.26%) of the semi-coated proppant decorated with stearic acid functionalized TiO₂ nanoparticles are improved. The thermal stability, acid solubility, and flow conductivity are analyzed as well. This work could provide a new idea for the preparation of quartz sand proppant to enhance the petroleum and gas production through hydraulic fracturing technology.

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硬脂酸功能化纳米TiO2修饰环氧半包覆石英砂支撑剂的制备及性能研究

本文成功制备了硬脂酸功能化TiO2纳米粒子修饰的疏水亲油环氧半包覆石英砂支撑剂。通过SEM、SDF和TEM对其进行了表征。与原石英砂支撑剂相比，环氧半包覆石英砂支撑剂的水接触角甚至可以达到141.6°，这是由于半包覆环氧树脂和疏水硬脂酸改性TiO2导致表面粗糙和疏水涂层所致。同时，可以通过控制石英砂的重量含量来调节水接触角。半包覆支撑剂经沸水处理4 h后仍能保持疏水性，热稳定性得到改善。硬脂酸功能化TiO2纳米粒子修饰的半包覆支撑剂的物理性能得到改善，包括容重（1.44 g/cm3）、表观密度（1.40 g/cm3）、酸溶解度（3.43%）和破碎率（1.26%）。并对其热稳定性、酸溶解度和导电性进行了分析。该研究为利用水力压裂技术制备石英砂支撑剂提高油气产量提供了新的思路。

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来源期刊

Advanced Composites and Hybrid Materials Multiple-

CiteScore

26.00

自引率

21.40%

发文量

185

期刊介绍： Advanced Composites and Hybrid Materials is a leading international journal that promotes interdisciplinary collaboration among materials scientists, engineers, chemists, biologists, and physicists working on composites, including nanocomposites. Our aim is to facilitate rapid scientific communication in this field. The journal publishes high-quality research on various aspects of composite materials, including materials design, surface and interface science/engineering, manufacturing, structure control, property design, device fabrication, and other applications. We also welcome simulation and modeling studies that are relevant to composites. Additionally, papers focusing on the relationship between fillers and the matrix are of particular interest. Our scope includes polymer, metal, and ceramic matrices, with a special emphasis on reviews and meta-analyses related to materials selection. We cover a wide range of topics, including transport properties, strategies for controlling interfaces and composition distribution, bottom-up assembly of nanocomposites, highly porous and high-density composites, electronic structure design, materials synergisms, and thermoelectric materials. Advanced Composites and Hybrid Materials follows a rigorous single-blind peer-review process to ensure the quality and integrity of the published work.