, Volume 5, Issue 2, pp 219–230 | Cite as

Nano-montmorillonite-doped lubricating grease exhibiting excellent insulating and tribological properties

  • Zhengfeng Cao
  • Yanqiu Xia
  • Xiang Xi
Open Access
Research Article


Three types of nano-montmorillonite were doped as additives to afford lubricating greases. The physicochemical, insulating, and tribological performances of the obtained lubricating greases were investigated in detail. Furthermore, the tribological action mechanisms were analyzed by high magnification optical microscope, Raman spectroscopy, and energy dispersive X-ray spectroscope (EDS). The results show that the inorganic modification montmorillonite (IOMMT) can significantly increase the number of electron traps in the base grease, leading to excellent insulating performances. Moreover, IOMMT as a novel lubricant additive (1.5 wt% in grease) significantly enhances the friction reducing and anti-wear abilities for steel/steel contact that comprises a unique layered structure to prevent friction between the contact pairs and the protective tribofilm generated by physical adsorption and chemical reaction.


nano-montmorillonite insulation friction and wear 



This work is supported by the National Natural Science Foundation of China (No. 51575181) and Beijing Natural Science Foundation of China (No. 51575181).


  1. [1]
    Waara P, Hannu J, Norrby T, Ake B. Additive influence on wear and friction performance of environmentally adapted lubricants. Tribol Int 34(34): 547–556 (2001)CrossRefGoogle Scholar
  2. [2]
    Qu J, Bansal D G, Yu B, Howe J Y, Luo H, Dai S, Li H, Blau P J, Bunting B G, Mordukhovich G, Smolenski D J. Antiwear performance and mechanism of an oil-miscible ionic liquid as a lubricant additive. Acs Appl Mater Interfaces 4(2): 997–1002 (2012)CrossRefGoogle Scholar
  3. [3]
    Piet M, Lugt. A review on grease lubrication in rolling bearings. Tribol Trans 52(4): 470–480 (2009)CrossRefGoogle Scholar
  4. [4]
    Ge X Y, Xia Y Q, Shu Z Y, Zhao X P. Conductive grease synthesized using nanometer ATO as an additive. Friction 3(1): 56–64 (2015)CrossRefGoogle Scholar
  5. [5]
    Ge X Y, Xia Y Q, Feng X. Influence of carbon nanotubes on conductive capacity and tribological characteristics of poly(ethylene glycol-ran-propylene glycol) monobutyl ether as base oil of grease. Trans ASME J Tribol 138: 0742–4787 (2015)CrossRefGoogle Scholar
  6. [6]
    Fan X Q, Xia Y Q, Wang L P. Tribological properties of conductive lubricating greases. Friction 2(4): 343–353 (2014)CrossRefGoogle Scholar
  7. [7]
    Fan X Q, Wang L P, Wen L, Wan S. Improving tribological properties of multialkylated cyclopentanes under eimulated epace environment: two feasible approaches. Acs Appl Mater Interfaces 7(26): 14259–14368 (2015)CrossRefGoogle Scholar
  8. [8]
    Fan X Q, Wang L P. Highly conductive ionic liquids toward high-performance space-lubricating greases. Acs Appl Mater Interfaces 6(16): 14660–14671 (2014)CrossRefGoogle Scholar
  9. [9]
    Voevodin A A, Zabinski J S. Nanocomposite and nanostructured tribological materials for space applications. Compos Sci Technol 65(5): 741–748 (2005)Google Scholar
  10. [10]
    Marchetti M, Jones W R, Street K W, Wheeler D, Dixon D, Jansen M J, Kimura H. Tribological performance of some pennzane-based greases for vacuum applications. Tribol Lett 12(4): 209–216 (2002)CrossRefGoogle Scholar
  11. [11]
    Ge X Y, Xia Y Q, Cao Z F. Tribological properties and insulation effect of nanometer TiO2 and nanometer SiO2 as additives in grease. Tribol Int 92: 454–461 (2015)CrossRefGoogle Scholar
  12. [12]
    Hassan A M, Shahba R M A, Youssif M A, Youssif M A, Mazrouaa A M, Youssif M A E. Preparation of some dielectric greases from different types of polymers. J Appl Polym Sci 119(2): 1026–1033 (2011)CrossRefGoogle Scholar
  13. [13]
    Ferrito S J, Makal J M. Accelerated aging characteristics of lubricating greases used for separable insulated connector applications. In Transmission and Distribution Conference— IEEE, 1999: 89–93.Google Scholar
  14. [14]
    Zahed S, SharifiSanjani N. The role of clay-montmorillonite on thermal characteristics and morphology of electrospun PAN nanofibrous mats. E-Polym 11(18): 898–905 (2013)Google Scholar
  15. [15]
    Yang T, Knutsson S. Swelling properties and permeability of expandable clays of potential use for nuclear waste disposal. J Earth Sci Geotech Eng 6: 49–61 (2016)CrossRefGoogle Scholar
  16. [16]
    Calvet R. Cation migration into empty octahedral sites and surface properties of clays. Clays Clay Miner 19(3): 175–186 (1971)CrossRefGoogle Scholar
  17. [17]
    Cheng M M, Song W J, Ma W H, Chen C C, Zhao J C, Lin J, Zhu H Y. Catalytic activity of iron species in layered clays for photodegradation of organic dyes under visible irradiation. Appl Catal B 77(3–4): 355–363 (2008)CrossRefGoogle Scholar
  18. [18]
    Lin F H, Chen C W, Kuo T F. Modified montmorillonite as vector for gene delivery. Biomaterials 27(17): 3333–3338 (2006)CrossRefGoogle Scholar
  19. [19]
    Usuki A, Kawasumi M, Kojima Y, Okada A, Kurauch T, Kamigaito O. Swelling behavior of montmorillonite cation exchanged for ω-amino acids by–caprolactam. J Mater Res 8(5): 1174–1178 (1993)CrossRefGoogle Scholar
  20. [20]
    Biswas M, Ray S S. Recent progress in synthesis and evaluation of polymer-montmorillonite nanocomposites. Adv Polym Sci 155: 167–221 (1970)CrossRefGoogle Scholar
  21. [21]
    And K E S, Manias E. Structure and properties of poly (vinyl alcohol)/Na+ montmorillonite nanocomposites. Chem Mater 12(10): 2943–2949 (2000)CrossRefGoogle Scholar
  22. [22]
    Pojanavaraphan T, Schiraldi D A, Magaraphan R. Mechanical, rheological, and swelling behavior of natural rubber/montmorillonite aerogels prepared by freeze-drying. Appl Clay Sci 50(2): 271–279 (2010)CrossRefGoogle Scholar
  23. [23]
    Rashmi, Renukappa N M, Suresha B, Devarajaiah R M, Shivakumar K N. Dry sliding wear behaviour of organomodified montmorillonite filled epoxy nanocomposites using Taguchi’s techniques. Mater Des 32(8–9): 4528–4536 (2011)CrossRefGoogle Scholar
  24. [24]
    Yuan Y, Liao R. A novel nanomodified cellulose insulation paper for power transformer. J Nanomater 2014(17): 1–6 (2014)CrossRefGoogle Scholar
  25. [25]
    Fan B L, Yang Y L, Feng C, Ma J, Tang Y, Dong Y, Qi X W. Tribological properties of fabric self-lubricating liner based on organic montmorillonite (OMMT) reinforced phenolic (PF) nanocomposites as hybrid matrices. Tribol Lett 57(3): 1–12 (2015)CrossRefGoogle Scholar
  26. [26]
    Du Y F, Lv Y Z, Li C R, Chen M T, Zhou J Q, Li X X, Zhou Y, Tu Y P. Effect of electron shallow trap on breakdown performance of transformer oil-based nanofluids. J Appl Phys 110(10): 1–4 (2011)CrossRefGoogle Scholar
  27. [27]
    Du Y F, Lv Y Z, Li C R, Zhong Y X, Chen M T, Zhang S N, Zhou Y, Chen Z Q. Effect of water adsorption at nanoparticle–oil interface on charge transport in high humidity transformer oil-based nanofluid. Colloids Surf A 415(415): 153–158 (2012)CrossRefGoogle Scholar
  28. [28]
    Ravichandran J. Properties and catalytic activity of acidmodified montmorillonite and vermiculite. Clays Clay Miner 45(6): 1–7 (2014)Google Scholar
  29. [29]
    Chi X H, Gao J G, Zhang X H. Electrical tree propagating characteristics of polyethylene/nano-montmorillonite composites. IEEE Trans Dielectr Electr Insul 22(3): 1530–1536 (2015)CrossRefGoogle Scholar
  30. [30]
    Wang H X, Wang H X, Xue L. Study of adsorption of industrial oil by expanded graphite. Carbon Tech 23: 21–23 (2004)Google Scholar
  31. [31]
    Taguchi Y, Matsumoto T, Tokura Y. Dielectric breakdown of one-dimensional mott insulators Sr2CuO3, and SrCuO2. Phys Rev B 62(11): 7015–7018 (2000)CrossRefGoogle Scholar
  32. [32]
    Oka T, Aoki H. Ground-state decay rate for the Zener breakdown in band and mott insulators. Phys Rev Lett 95(13): 137601–137601 (2005)CrossRefGoogle Scholar
  33. [33]
    Liang Y, Chen Y X, Liu Y P. The development of the threeelectrode testing system for the volume resistivity of composite insulation materials. Sensors-Basel 10(3): 1–5 (2012)Google Scholar
  34. [34]
    Rakowska A, Hajdrowski K. Influence of different test conditions on volume resistivity of polymeric insulated cables and polyethylene samples. In Dielectric Materials, Measurements and Applications, English International Conference—IEEE, 2000: 281–284.CrossRefGoogle Scholar
  35. [35]
    Huang J G, O’Sullivan F, Zahn M, Hjortstam O, Pettersson L A A, Liu R. Modeling of streamer propagation in transformer oil-based nanofluids. In Electrical Insulation and Dielectric Phenomena—IEEE, 2008: 361–366.Google Scholar
  36. [36]
    Henry C H, Lang D V. Nonradiative capture and recombination by multiphonon emission in GaAs and GaP. Phys Rev B 15(2): 989–1016 (1977)CrossRefGoogle Scholar
  37. [37]
    Zhou J Q, Du Y F, Chen M T, Li C R, Li X X, Lv Y Z. AC and lightning breakdown strength of transformer oil modified by semiconducting nanoparticles. In Electrical Insulation and Dielectric Phenomena—IEEE, 2011: 652–654.Google Scholar
  38. [38]
    Du Y F, Lv Y Z, Li C R, Chen M T, Zhou J Q, Li X X, Liu Tong. Insulating property and mechanism of semiconducting nanoparticles modified transformer oils. Proc Csee 32(10): 177–182 (2012)Google Scholar
  39. [39]
    Zhang W, Xu M, Zhang X, Xie D R. Study of montmorillonite concentration on dielectric property and dispersion of crosslinked polyethylene/montmorillonite nano-composites. In Electrical Insulation and Dielectric Phenomena—IEEE, 2013: 531–534.Google Scholar
  40. [40]
    Frost R L, Rintoul L. Lattice vibrations of montmorillonite: an FT Raman and X-ray diffraction study. App Clay Sci 11(2-4): 171–183 (1996)CrossRefGoogle Scholar
  41. [41]
    Xu K, Wang J, Xiang S, Chen Q, Zhang W D, Wang P X. Study on the synthesis and performance of hydrogels with ionic monomers and montmorillonite. App Clay Sci 38(s1–2): 139–145 (2007)CrossRefGoogle Scholar
  42. [42]
    Lübbe M, Gigler A M, Stark R W, Moritz W. Identification of iron oxide phases in thin films grown on Al2O3(0001) by Raman spectroscopy and X-ray diffraction. Sur Sci 604(7–8): 679–685 (2010)CrossRefGoogle Scholar
  43. [43]
    Shim, Duffy SH, Thomas S. Raman spectroscopy of Fe2O3 to 62 GPa. Am Mineral 87(2-3): 318–326 (2015)CrossRefGoogle Scholar
  44. [44]
    Hensen E J M, Tambach T J, Bliek A, Smit B. Adsorption isotherms of water in Li–, Na–, and K–montmorillonite by molecular simulation. J Chem Phys 115(7): 3322–3329 (2001)CrossRefGoogle Scholar
  45. [45]
    Yu H L, Xu Y, Shi P J, Wang H M, Zhao Y, Xu B S, Bai Z M. Tribological behaviors of surface-coated serpentine ultrafine powders as lubricant additive. Tribol Int 43(3): 667–675 (2010)CrossRefGoogle Scholar
  46. [46]
    Frost R L, Cash G A, Kloprogge J T. Rocky Mountain leather, sepiolite and attapulgite–an infrared emission spectroscopic study. Vib Spectrosc 16(2), 173–184 (1998)CrossRefGoogle Scholar
  47. [47]
    Zhang B S, Xu Y, Xu B S, Gao F, Shi P J, Zhang B. The self-reconditioning effect of the phyllosilicate lubricating material on Fe-based tribopairs. J Funct Mater 42(7): 1301–1304 (2011)Google Scholar
  48. [48]
    Yang Y, Gu J, Kang F, Kong X, Wei M. Surface restoration induced by lubricant additive of natural minerals. Appl Surf Sci 253(18): 7549–7553 (2007)CrossRefGoogle Scholar
  49. [49]
    Wang F. Research on microstructure of the auto-restoration layer of worn surface of metals. Mater Sci Eng A 399(1–2): 271–275 (2005)CrossRefGoogle Scholar

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Authors and Affiliations

  1. 1.School of Energy Power and Mechanical EngineeringNorth China Electric Power UniversityBeijingChina

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