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通过将疏水的纳米颗粒吸附在岩心微通道壁面, 可以形成具有类荷叶表面的双重微结构表面, 从而在注水开发的过程中在岩心微通道壁面产生水流滑移, 达到降低注水压力、增加注水量的目的. 研究纳米颗粒吸附岩心切片表面的强疏水特征对纳米颗粒吸附法减阻技术具有重要的意义. 本文简要叙述了荷叶、蚊子腿以及水黾腿的超疏水特征; 介绍了制备具有亚微米、纳米双重微结构的强疏水表面的纳米颗粒吸附法; 给出了规则排列时纳米颗粒吸附岩心切片表面的强疏水特征的物理机制, 根据真实的纳米颗粒吸附岩心切片, 给出了接触角的范围, 计算结果与实验数据一致. 岩心流动实验结果表明, 经纳米颗粒分散液处理后, 岩心的平均水相渗透率提高94%.A compact hydrophobic nanoparticle (HNP) adsorption layer, which has miro- and nano-dual structural properties like lotus leaf, can be built by adsorbing HNP on core surfaces. A slip velocity on the surface can be produced with the purpose of reducing the water resistance and increasing water injection rate. The results are of significance for the study of HNP drag reduction technology. In this paper we give a briefing of the super hydrophobic properties of the lotus leaf, mosquito legs, and striders leg. The strong hydrophobic surface preparation method with HNP adsorption layer is presented, and physical mechanism of strong hydrophobic surfaces with regular arrangement of HNPs is given. According to the real HNP adsorption core samples, the contact angle range is given, the calculation results accord well with experimental data. Core displacement experimental results show that the average drag reduction rate can be up to 94%.
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Keywords:
- nanoparticls /
- adsorption method /
- dual microstructures /
- hydrophobic
[1] Neinhuis C, Barthlott W 1997 Annals of Botany 79 667
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[15] Feng L, Zhang Z, Mai Z, Ma Y, Liu B, Jiang L, Zhu D 2004 Angew. Chem. Int. Ed. 43 2012
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[20] Di Q F, Shen C, Wang Z H, Gu C Y, Shi L Y, Fang H P 2009 Acta Petrolei Sinica 30 125 (in Chinese) [狄勤丰, 沈琛, 王掌洪, 顾春元, 施利毅, 方海平 2009 石油学报 30 125]
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[22] Huang D M, Sendner C, Horinek D 2008 Phys. Rev. Lett. 101 226101
[23] Gao P, Geng X G, Ou X L, Xue W H 2009 Acta Phys. Sin. 58 421 (in Chinese) [高鹏, 耿兴国, 欧修龙, 薛文辉 2009 物理学报 58 421]
[24] Gong M G, Xu X L, Yang Z 2010 Chin. Phys. B 19 056701
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[1] Neinhuis C, Barthlott W 1997 Annals of Botany 79 667
[2] Shibuichi S, Yamamoto T, Onda T, Tsuiji K 1998 Langmuir 208 287
[3] Gao X F, Jiang L 2006 Physics 35 559 (in Chinese) [高雪峰, 江雷 2006 物理 35 559]
[4] Cottin B C, Barrat J L, Bocquet L, Charlaix E 2003 Nat. Mater. 2 237
[5] Choi C, Westin K, Breuer K 2003 Physics of Fluids 15 2897
[6] Wang X L, Di Q F, Zhang R L, Gu C Y 2010 Adv. Mech. 40 241 (in Chinese) [王新亮, 狄勤丰, 张任良, 顾春元 2010 力学进展 40 241]
[7] Feng L, Li S, Li Y, Zhang L, Zhai J, Song Y, Liu B, Jiang L, Zhu D 2002 Adv. Mater. 14 1857
[8] Blossey R 2003 Nat. Mater. 2 301
[9] Kong X Q, Wu C W 2010 Chin. Sci. Bull. 55 1589 (in Chinese) [孔祥清, 吴承伟 2010 科学通报 55 1589]
[10] Gao X F, Jiang L 2003 Nature 432 36
[11] Lauga E, Brenner M P, Stone H A 2005 Handbook of Experimental Fluid Dynamics (New York: Springer) Chap. 15
[12] Voronov R S, Papavassiliou D V 2008 Ind. Eng. Chem. Res. 47 2455
[13] Nishino T, Meguro M, Nakamae K Matsushita M, Ueda Y 1999 Langmuir 15 4321
[14] Feng L, Song Y, Zhai J, Liu B, Xu J, Jiang L, Zhu D 2003 Angew. Chem. Int. Ed. 42 800
[15] Feng L, Zhang Z, Mai Z, Ma Y, Liu B, Jiang L, Zhu D 2004 Angew. Chem. Int. Ed. 43 2012
[16] Gu C Y, Di Q F, Shi L Y, Wu F, Wang W C, Yu Z B 2008 Acta Phys. Sin. 57 3071 (in Chinese) [顾春元, 狄勤丰, 施利毅, 吴非, 王文昌, 余祖斌 2008 物理学报 57 3071]
[17] Patankar N A 2003 Langmuir 19 1249
[18] Li D, Di Q F, Li J Y, Qian Y H, Fang H P 2007 Chin. Phys. Lett. 24 1021
[19] Cassie A B D, Baxter S 1944 Trans. Faraday Soc. 40 546
[20] Di Q F, Shen C, Wang Z H, Gu C Y, Shi L Y, Fang H P 2009 Acta Petrolei Sinica 30 125 (in Chinese) [狄勤丰, 沈琛, 王掌洪, 顾春元, 施利毅, 方海平 2009 石油学报 30 125]
[21] Rothstein J P 2010 Annual Review of Fluid Mechanics 42 89
[22] Huang D M, Sendner C, Horinek D 2008 Phys. Rev. Lett. 101 226101
[23] Gao P, Geng X G, Ou X L, Xue W H 2009 Acta Phys. Sin. 58 421 (in Chinese) [高鹏, 耿兴国, 欧修龙, 薛文辉 2009 物理学报 58 421]
[24] Gong M G, Xu X L, Yang Z 2010 Chin. Phys. B 19 056701
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