One-step synthesis and properties of SiO2/polystyrene hydrophobic composite microspheres

被引：0

作者：

Yuan H. ^{[1
]}

Gong Y. ^{[1
]}

Wu S. ^{[1
]}

He C. ^{[1
]}

Zhou H. ^{[1
]}

Wan X. ^{[1
]}

Ren X. ^{[2
]}

机构：

[1] Zhanjiang Branch, CNOOC Petroleum China Limited, Zhanjiang

[2] School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang

来源：

Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2021年 / 38卷 / 08期

关键词：

Composite microspheres; High strength; Hydrophobicity; Polystyrene; SiO[!sub]2[!/sub;

D O I：

10.13801/j.cnki.fhclxb.20201030.009

中图分类号：

学科分类号：

摘要：

The styrene, divinylbenzene and KH570 were used as monomers to preparer the cross-link polystyrene microspheres (SiO2/polystyrene hydrophobic composite microspheres), on which the SiO2 rough structure was sucessfully designed via suspension polymerization along with sol-gel reaction in one step. Besides, effects of the oil phase composition, amount of the KH570 and the sol-gel reaction condition on the strength and hydrophobic properties of the SiO2/polystyrene hydrophobic composite microspheres were studied. The results show that the SiO2/polystyrene hydrophobic composite microspheres with durable hydrophobic properties, high strength and ultra-low density could be obtained when the toluene in the oil phase is discarded and the pH value of the system is tuned to 10-11 by ammonia-water at the 50℃ reaction stage. The SiO2/polystyrene hydrophobic composite microsphere exhibits the apparent density about 0.9917 g∙cm−3, low crushing rate (2.53% under 69 MPa closure pressure), high initial static water contact angle (as high as 140.7°) and excellent heat resistance (the glass transition temperature and decomposition temperature are up to 160℃ and 390℃, respectively). When refluxed in the chelate acid HD and FA that applied in Well A5 in Weizhou X Oil field for 30 days, the static water contact angles on the surface of the SiO2/polystyrene hydrophobic composite microspheres fluctuate only within ±10% and ±7%, respectively. The SiO2/polystyrene hydrophobic composite microsphere shows great potential in deep reservoir as a proppant, which is also suitable for the water control process as a packing material. © 2021, Editorial Office of Acta Materiae Compositae Sinica. All right reserved.

引用

页码：2538 / 2545

页数：7

共 21 条

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