One-step synthesis and properties of SiO<sub>2</sub>/polystyrene hydrophobic composite microspheres

YUAN Hui; GONG Yunlei; WU Shaowei; HE Changlin; ZHOU Hongyu; WAN Xiaojin; REN Xianyan

doi:10.13801/j.cnki.fhclxb.20201030.009

Volume 38 Issue 8

Aug. 2021

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YUAN Hui, GONG Yunlei, WU Shaowei, et al. One-step synthesis and properties of SiO2/polystyrene hydrophobic composite microspheres[J]. Acta Materiae Compositae Sinica, 2021, 38(8): 2538-2545. doi: 10.13801/j.cnki.fhclxb.20201030.009

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YUAN Hui, GONG Yunlei, WU Shaowei, et al. One-step synthesis and properties of SiO₂/polystyrene hydrophobic composite microspheres[J]. Acta Materiae Compositae Sinica, 2021, 38(8): 2538-2545. doi: 10.13801/j.cnki.fhclxb.20201030.009

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

doi: 10.13801/j.cnki.fhclxb.20201030.009

YUAN Hui^1
,,
GONG Yunlei^1
,,
WU Shaowei^1
,,
HE Changlin^1
,,
ZHOU Hongyu^1
,,
WAN Xiaojin^1
,,
REN Xianyan^{2
,
,}

1.
Zhanjiang Branch, CNOOC Petroleum China Limited, Zhanjiang 524000, China
2.
School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China

Received Date: 2020-08-24
Accepted Date: 2020-10-21

Available Online: 2020-10-30

Publish Date: 2021-08-15

Abstract

Abstract

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°C 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°C and 390°C, 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.
- SiO₂,
- polystyrene,
- composite microspheres,
- hydrophobicity,
- high strength
Long Abstrsct
Innovation Points

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References(21)

References

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