| SiO2/聚苯乙烯疏水复合微球的一步法合成和性能 |
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| 引用本文： | 袁辉,龚云蕾,吴绍伟,何长林,周泓宇,万小进,任先艳.SiO2/聚苯乙烯疏水复合微球的一步法合成和性能[J].复合材料学报,2021,38(8):2538-2545. |
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| 作者姓名： | 袁辉 龚云蕾 吴绍伟 何长林 周泓宇 万小进 任先艳 |
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| 作者单位： | 1.中海石油(中国)有限公司 湛江分公司，湛江 524000 |
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| 基金项目： | 南海西部高含水水平井控水挖潜新技术研究与应用(YXKY-2019-ZJ-03) |
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| 摘 要： | 提出了以苯乙烯、二乙烯基苯和γ-甲基丙烯酰氧基丙基三甲氧基硅烷(KH570)为单体，通过伴随着溶胶-凝胶反应的悬浮聚合法一步制备表面构筑有SiO2粗糙结构的交联聚苯乙烯微球(SiO2/聚苯乙烯疏水复合微球)。研究了油相组成、KH570用量和溶胶-凝胶反应条件对SiO2/聚苯乙烯疏水复合微球强度和疏水性能的影响。结果表明，当弃除油相中的溶剂甲苯，在50℃的恒温反应阶段采用氨水调控体系pH值为10~11时可以获得兼具持久疏水性能、高强度和超低密度的SiO2/聚苯乙烯疏水复合微球。SiO2/聚苯乙烯疏水复合微球的表观密度约0.9917 g?cm?3，69 MPa的闭合压力下破碎率低至2.53%，表面静态水接触角高达140.7°，耐热性能优异(玻璃化转变和分解温度分别高达160℃和390℃)。尤其是，在涠州X油田A5井的螯合酸HD和FA中持续回流30天的过程中，SiO2/聚苯乙烯疏水复合微球表面的接触角变化仍分别保持在±10%和±7%以内。SiO2/聚苯乙烯疏水复合微球具备作为深部储层开采用支撑剂的极大潜力，也可用作封隔体控水工艺中的充填材料。
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| 关 键 词： | SiO2 聚苯乙烯 复合微球 疏水 高强 |
| 收稿时间： | 2020-08-24 |
One-step synthesis and properties of SiO2/polystyrene hydrophobic composite microspheres |
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| Affiliation: | 1.Zhanjiang Branch, CNOOC Petroleum China Limited, Zhanjiang 524000, China2.School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China |
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| 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. |
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