多层组装磁性聚合物复合微球调剖剂的制备及性能

doi:10.7503/cjcu20170469

高等学校化学学报 ›› 2018, Vol. 39 ›› Issue (3): 583.doi: 10.7503/cjcu20170469

多层组装磁性聚合物复合微球调剖剂的制备及性能

张定军(), 白雪, 陈玉娴, 吴彦飞, 李宪文, 陈振斌, 马应霞

兰州理工大学材料科学与工程学院,有色金属先进加工与再利用省部共建国家重点实验室, 兰州 730050

收稿日期:2017-07-06 出版日期:2018-03-10 发布日期:2018-01-13
作者简介:联系人简介: 张定军, 男, 博士, 副教授, 主要从事功能高分子材料及应用方面的研究. E-mail:zhangdingjunlut@163.com
基金资助:
国家自然科学基金(批准号: 51663013)资助

Preparation and Performance of Magnetic Polymer-composite Microspheres Profile Control Agent by Multilayer Assembly^†

ZHANG Dingjun^*(), BAI Xue, CHEN Yuxian, WU Yanfei, LI Xianwen, CHEN Zhenbin, MA Yingxia

State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, School of Materials & Science, Lanzhou University of Technology, Lanzhou 730050, China

Received:2017-07-06 Online:2018-03-10 Published:2018-01-13
Contact: ZHANG Dingjun E-mail:zhangdingjunlut@163.com
Supported by:
† Supported by the National Natural Science Foundation of China(No.51663013)

摘要/Abstract

摘要：

以四氧化三铁(Fe₃O₄)、丙烯酰胺(AM)、丙烯酸(AA)、丙烯腈(AN)为原料, 采用反相乳液聚合法和沉淀聚合法制备核-壳结构的磁性凝胶微球调剖剂P(AA-AM-AN)/Fe₃O₄. 利用扫描电子显微镜(SEM)、傅里叶变换红外光谱(FTIR)和振动样品磁强计(VSM)对P(AA-AM-AN)/Fe₃O₄进行了表征, 研究了不同制备条件下调剖剂的吸水溶胀性能, 探讨了其在模拟地层环境条件下的堵水调剖性能. 研究结果表明, 制备的具有超顺磁性的P(AA-AM-AN)/Fe₃O₄复合微球可实现磁性分离回收处理. 由于疏水性聚丙烯腈的存在, 所制备的磁性微球调剖剂具有良好的运送特性. 当m(AN)∶m(P(AA-AM)/Fe₃O₄)为1.25∶1时, P(AA-AM-AN)/Fe₃O₄的吸水性能最优, 吸水倍率高达82.8 g/g. 另外, P(AA-AM-AN)/Fe₃O₄的吸水倍率随油藏地层水温度的增加而逐步增大, 随NaCl含量的增加而逐渐降低.

关键词: 调剖剂, 吸水倍率, 磁性聚合物复合微球

Abstract:

The magnetic gel microspheres P(AA-AM-AN)/Fe₃O₄ were prepared by inverse emulsion polymerization and precipitation polymerization using iron oxide (Fe₃O₄), acrylamide (AM), acrylic acid (AA) and acrylonitrile (AN) as raw materials. The P(AA-AM-AN)/Fe₃O₄ were characterized by scanning electron microscopy(SEM), Fourier transform infrared spectroscopy(FTIR) and vibrating sample magnetometer(VSM). At the same time, The water-absorption performance of the magnetic profile control agents were studied under different preparation conditions and the profile control performance was discussed under simulated stratum environment condition. The experimental results show that the P(AA-AM-AN)/Fe₃O₄ magnetic composite microspheres were prepared, the microspheres have superparamagnetism, and can realize magnetic separation and recovery. The prepared microspheres have good transport properties due to the presence of hydrophobic polyacrylonitrile. The water-absorption performance of the magnetic gel microspheres is superior to others when the mass ratio of AN and P(AA-AM)/Fe₃O₄ is 1.25∶1, or rather, the water absorption rate is as high as 82.8 g/g. Besides, the water absorption rate of the magnetic gel microspheres was gradually increased with the increase of the water temperature of reservoir formation, and the decrease of NaCl content.

Key words: Profile control agent, Water absorption rate, Magnetic polymer-composite microsphere

中图分类号:

O631.5

TrendMD:

张定军, 白雪, 陈玉娴, 吴彦飞, 李宪文, 陈振斌, 马应霞. 多层组装磁性聚合物复合微球调剖剂的制备及性能. 高等学校化学学报, 2018, 39(3): 583.

ZHANG Dingjun, BAI Xue, CHEN Yuxian, WU Yanfei, LI Xianwen, CHEN Zhenbin, MA Yingxia. Preparation and Performance of Magnetic Polymer-composite Microspheres Profile Control Agent by Multilayer Assembly^†. Chem. J. Chinese Universities, 2018, 39(3): 583.

图/表 8

Scheme 1 Simulation diagram of the preparation of microspheres profile control agent

Fig.1 FTIR spectra of Fe3O4(a), KH570 modified Fe3O4(b), P(AA-AM)/Fe3O4(c) and P(AA-AM-AN)/Fe3O4(d)

Fig.2 Dispersion of KH570 modified Fe3O4 nanoparticles in methanol(a), ethanol(b), cyclohexane(c), liquid paraffin(d) and distilled water(e)

Fig.3 SEM images of Fe3O4 (A), KH570 modified Fe3O4(B), P(AA-AM)/Fe3O4(C) and P(AA-AM-AN)/Fe3O4(D)Insets: enlarged graphs of rectangles in (C) and (D), respectively.

Fig.4 Effects of AN dosage on water absorption rate at 20 ℃(A), 30 ℃(B), 40 ℃(C),50 ℃(D) and 60 ℃(E)m(AN)∶m[P(AA-AM/Fe3O4]: a. 0.50∶1; b. 0.75∶1; c. 1.00∶1; d. 1.25∶1; e. 1.50∶1.

Fig.5 Effects of temperature on water absorption of P(AA-AM)/Fe3O4(A, C) and P(AA-AM-AN)/Fe3O4(B, D)(A), (B) 0—6000 min; (C) 0—100 min; (D) 0—340 min. Temperature/℃: a. 20; b. 30; c. 40; d. 50; e. 60.

Fig.6 Effects of NaCl content on water absorption rate of P(AA-AM)/Fe3O4(A) and P(AA-AM-AN)/Fe3O4(B)Concentration of NaCl/(mg·mL-1): a. 1; b. 3; c. 5; d. 7; e. 9.

Fig.7 Hysteresis loops of P(AA-AM-AN)/Fe3O4 nanoparticleInset: P(AA-AM-AN)/Fe3O4 photos without(a) and with(b) magnetic.

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多层组装磁性聚合物复合微球调剖剂的制备及性能

Preparation and Performance of Magnetic Polymer-composite Microspheres Profile Control Agent by Multilayer Assembly^†

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多层组装磁性聚合物复合微球调剖剂的制备及性能

Preparation and Performance of Magnetic Polymer-composite Microspheres Profile Control Agent by Multilayer Assembly†

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Preparation and Performance of Magnetic Polymer-composite Microspheres Profile Control Agent by Multilayer Assembly^†