Proceedings of SerbiaTrib '13

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the molecular order of SAMs. The molecularstructure of the solution seems to be a key element.It is chiefly controlled by the temperature andconcentration of the solution. The fact that theKrafft temperature range of CTAB is around roomtemperature (25C), makes this systemparticularly complex.We have systematically studied the transferacross the three-phase boundary, under differentexperimental conditions and different adsorptionprotocols. The surfactant films on mica, formedaccording to different experimental protocols, werecharacterized by contact angle measurements andby AFM. It has been observed that the transitionthrough the three-phase boundary during sampleextraction can be a step of significant influence onthe SAM morphology.A high stability of the adsorbed films is veryrarely detected. The problem of reproducibility inSAMs formation can be observed by controlling thetemperature during all steps, or, working below thecmc. A reproducible stability of the resulting films,however, remains an issue.Acknowledgements: The author would like togratefully acknowledge the support in obtainingand understanding the presented results provided byher mentors, Nicholas D. Spencer and ManfredHeuberger, members of the Laboratory for SurfaceScience and Technology (LSST), a part of theDepartment of Materials at the ETH Zurich,Switzerland, where all the experiments wereperformed.REFERENCES[1] M. K. Chaudhury: Adhesion and friction of selfassembledorganic monolayers, Current opinion incolloid & interface science, Vol.2, pp. 65-69, 1997.[2] S. Manne et al.: Direct Visualization of SurfactantHemimicelles by Force Microscopy of the ElectricalDouble-Layer, Langmuir, Vol.10(12), pp. 4409-4413, 1994.[3] A. Ulman: Formation and Structure of Self-Assembled Monolayers, Chem. Rev., Vol. 96, pp.1533-1554, 1996.[4] H. Patrick et al.: Surface micellization patterns ofquaternary ammonium surfactants on mica,Langmuir, Vol. 15(5), pp. 1685-1692, 1999.[5] S. Manne, H. Gaub: Molecular-Organization ofSurfactants at Solid-Liquid Interfaces, Science, Vol.270(5241), pp. 1480-1482, 1995.[6] W. Ducker, E.Wanless: Adsorption ofhexadecyltrimethylammonium bromide to mica:Nanometer-scale study of binding-site competitioneffects, Langmuir, Vol. 15(1), pp. 160-168, 1999.[7] M. Fujii et al.: Heterogeneous growth and selfrepairingprocesses of two-dimensional molecularaggregates of adsorbedoctadecyltrimethylammonium bromide at cleavedmica aqueous solution interface as observed by insitu atomic force microscopy, Langmuir, Vol.15(10), pp. 3689-3692, 1999.[8] R. Atkin et al.: Adsorption kinetics and structuralarrangements of cationic surfactants on silicasurfaces, Langmuir, Vol. 16(24), pp. 9374-9380,2000.[9] K. Boschkova et al.: Lubrication in aqueoussolutions using cationic surfactants - a study ofstatic and dynamic forces, Langmuir, Vol. 18(5),pp. 1680-1687, 2002.[10] B.Y.Li et al.: Time dependent anchoring ofadsorbed cationic surfactant molecules atmice/solution interface, Journal of Colloid andInterface Science, Vol. 209(1), pp. 25-30, 1999.[11] K. Eskilsson and V.V. Yaminsky: Deposition ofmonolayers by retraction from solution:Ellipsometric study of cetyltrimethylammoniumbromide adsorption at silica-air and silica-waterinterfaces, Langmuir, Vol. 14(9), pp. 2444-2450,1998.[12] S. Manne et al.: Direct Visualization of SurfactantHemimicelles by Force Microscopy of the ElectricalDouble-Layer, Langmuir, Vol. 10(12), pp. 4409-4413, 1994.[13] J. a. M. Mellott: Supercritical self-assembledmonolayer growth, Journal of the AmericanChemical Society, Vol. 126(30), pp. 9369-9373,2004.[14] HY Nie et al.: Robust self-assembledoctadecylphosphonic acid monolayers on a micasubstrate, Langmuir, Vol. 21(7), pp. 2773-2778,2005.[15] T. Horr et al.: XPS film thickness and adsorptionstudies of alkyltrimethylammonium bromides andorganosilanes on silica surfaces, Colloids andSurfaces A: Physicochemical and EngineeringAspects, Vol. 102, pp. 181-190, 1995.[16] S. Nishimura et al.: AFM Studies of AmineSurfactant Hemimicelle Structures at the Mica-Water Interface, Colloids and Surfaces A:Physicochemical and Engineering Aspects, Vol.103(3), pp. 289-298, 1995.[17] M. Rutland, J. Parker: Surface Forces betweenSilica Surfaces in Cationic Surfactant Solutions -Adsorption and Bilayer Formation at Normal andHigh pH, Langmuir, Vol.10(4), pp. 1110-1121,1994.[18] A. e. a. Rennie: Structure of a Cationic SurfactantLayer at the Silica Water Interface, Langmuir, Vol.6(5), pp. 1031-1034, 1990.[19] R. Pashley, J. Israelachvili: A Comparison ofSurface Forces and Interfacial Properties of Mica inPurified Surfactant Solutions, Colloids andSurfaces, Vol. 2(2), pp. 169-187, 1981.[20] M. Fujii et al.: Two-dimensional arrangements ofadsorbed alkylammonium halides on cleaved micasurface, Langmuir, Vol. 17(4), pp. 1138-1142, 2001.182 13 th International Conference on Tribology – Serbiatrib’13
[21] B. G. Sharma et al.: Characterization of adsorbedionic surfactants on a mica substrate, Langmuir,Vol. 12(26), pp. 6506-6512, 1996.[22] G. Ceotto et al.: Ionic surfactant films imaged byatomic force microscopy, Journal of MolecularCatalysis A: Chemical, Vol 167(1-2), pp. 225-233,2001.[23] T. Davey et al.: Krafft temperature depression inquaternary ammonium bromide surfactants,Langmuir, Vol. 14(12), pp. 3210-3213, 1998.[24] Y. L. Chen et al.: Molecular MechanismsAssociated with Adhesion and Contact-AngleHysteresis of Monolayer Surfaces, Journal ofPhysical Chemistry, Vol. 95(26), pp. 10736-10747,1991.[25] F.Zhao et al.: Adsorption behavior ofhexadecyltrimethylammonium bromida (CTAB) tomica substrates as observed by atomic forcemicroscopy, Science in China Ser. B Chemistry,Vol. 48(2), pp. 101-106, 2005.[26] Manojlovic J.: Structure, morphology andhistory effects in surfactant self-assembly,Ph.D. thesis, ETH Zurich, Switzerland , 2006.13 th International Conference on Tribology – Serbiatrib’13 183
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SerbianTribologySocietyFacultyofEng
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Serbian Tribology SocietyUniversity
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Supported byMinistry of Education,
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PrefaceThe International Conference
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ContentsPlenary Lectures1. THE GREE
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27. WEAR CHARACTERISTICS OF HYBRID
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Tribometry57. PRELIMINARY STUDY ON
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Plenary Lectures13 th International
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Serbian TribologySocietySERBIATRIB
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Figure 4. Diagram of the height and
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Realization of the approach is base
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edge without chamfer and smaller ra
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Figure 7. Accumulated tool life in
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Figure 13. Calculated and measured
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Friction deformation of the bronze
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engine cylinders of 2-cylinder-twot
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Table 1: Chemical composition of sa
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Table 4: Comparative wear-resistanc
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- measuring of coating thickness h
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Figure 5. Functional scheme of the
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Table 2. Test results for massive w
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knowledge transfer in the field ofm
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Table 1. Parameters of the electroc
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Figure 6. Wear resistance by linear
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coatings and observed their good we
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c)a)Figure 2: SEM images and micros
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Room temperature 300°CNi/µSiCNiNi
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COF [-] COF [-]Fig.9: COF graphs at
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about 260 nm is related to isolated
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contact’s conformity [18] they ob
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In order to calculate the metallic
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microscopic inspection of the Rp3 s
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otating plate. The shaft passes thr
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similar trends of variation are obs
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smooth, gear fiber-mild steel rough
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[2] Tabor, D.: “Friction and wear
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(10, 50 and 100 N) against surface
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[9] B.R. Gligorijevic, A. Vencl, B.
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dielectric properties, high resista
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parameter, Sv, was slightly influen
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dependence of roughness height and
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Polyethylenes with a molecular weig
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[9] K.S. Kanaga Karuppiah, A.L. Bru
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MgCO3•CaCO3 (13% Mg), and carnall
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fully compatible with MRI/MSCT imag
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5. CONCLUSIONThe magnesium alloys a
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Zinc dialkyldithiophosphate (ZDDP)
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C- Lower deposits with NPNA on comb
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films. Carraro et al. [10] examined
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PlateCount No.Critical Load ( N)120
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solid melt of ZA27 alloy using mech
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SiC particles are uniformly distrib
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in number of micro-cracks and clust
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PBT has the average values of the f
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mechanical pressure and thermal loa
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3. EXPERIMENTAL RESULTSTaking into
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[12] L. Blunt De, X. Jiang: Advance
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2. EXPERIMENTALTESTING2.1 MaterialT
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figure 3a it could be seen that the
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Page 145 and 146: and lubrication is done so that the
Page 147 and 148: 5. CONCLUSIONFigure 11. The accumul
Page 149 and 150: Serbian TribologySocietySERBIATRIB
Page 151 and 152: esistance was found for composite c
Page 153 and 154: onze, which is embedded within the
Page 157 and 158: The test contact pair meets the req
Page 159 and 160: complete. The SEM analysis maycontr
Page 163 and 164: tg( ) tg 100, [%] (2)tgwhere are:
Page 165 and 166: corresponding to the maximum value
Page 169 and 170: electrostatics [17]. Due to the fle
Page 171 and 172: 250nm size have been observed, acco
Page 173 and 174: ETH Zurich, Switzerland, where all
Page 175 and 176: comparison with the synthetic reinf
Page 177 and 178: 3. RESULTS AND DISCUSSION3.1 Micros
Page 179 and 180: (a)(b)Figure 4. Showing (a) variati
Page 181 and 182: composites. But the composite compo
Page 185 and 186: coated and uncoated region after ad
Page 187 and 188: has been measured between the top s
Page 189 and 190: Fig. 9 shows the wear track obtaine
Page 193 and 194: Mica samples preparationFor the ads
Page 195: According to the AFM results in fig
Page 199 and 200: chemical vapor deposition method wi
Page 201 and 202: analysis (a) and an approximate che
Page 203 and 204: Table 3. Friction coefficients of s
Page 205: A.K.Oleynik, V.M.Matsevity, ea.]. /
Page 211 and 212: Most of the friction units of produ
Page 213 and 214: In order to provide both high parts
Page 215 and 216: Fig. 3. The comparison the criterio
Page 217 and 218: Table 3. Experimental and calculate
Page 219 and 220: For developing the numerical model
Page 221 and 222: ,eccentricities and hydrodynamic pr
Page 223 and 224: hydrodynamic regime. However, for b
Page 225 and 226: to obtain the temperature distribut
Page 227 and 228: force (pressure) between two contac
Page 229 and 230: 5E-06The total displacement [m]4.5E
Page 233 and 234: [11]. Figure 5 shows s the influenc
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Page 237 and 238: 38GSA. The chemical composition, de
Page 239 and 240: niobium. It should be noted that fo
Page 241 and 242: Figure 1. Friction force on side su
Page 243 and 244: exploitation this changing is signi
Page 245 and 246: 2. EFFICIENCY OF CYCLO DRIVEEfficie
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Figure 6. Dependence of cyclo drive
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common for their ability to be inst
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FNF (11)R sin cos11 21 22FNF
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Normal force [N]4000350030002500200
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analytical tests. The analytical te
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Table 4. Results of zero samples of
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noticeable, and by the end of explo
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4. PLASTIC BEARING APPLICATIONSRega
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For Elastohydrodynamic film thickne
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The results concluded for different
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For Thrust Force of 40KNKrytox 215
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Krytox 215 (µ = 0.03204 Pa.s)Figur
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- Reliable exploitation tools, prim
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In addition, as a result of cyclic
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AcknowledgementThe part of this res
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Thepressure angle can be calculated
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mechanism these parameters are fina
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causes big changes of their propert
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Table 2. Impact toughness of some t
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Figure 1. Appearance of fractured f
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implementation of these new manugac
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additional energy is dissipated due
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The adopted geometry parameters are
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4. CONCLUSIONTools of virtual produ
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Figure 2. Structure of the machinin
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3. ANALYSIS OF RESULTSThe results o
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Figure 15. Surface roughness regard
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From the analysis of the diagram it
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comparison from economic, energy co
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Advantages and disadvantages of tra
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The information provided by footwea
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Force (N)5,554,543,532,521,510,50Ex
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additives, that had been, until rec
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Figure 1. Test results for samples
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Table 7. Test results of oil sample
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Input parameters- Current intensity
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edge formed into a thin line. At th
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Lower values of current are not res
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Table 1. Chemical composition of si
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flowable at high temperatures and v
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holes (pits) emerge in the shape of
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[4] W. Schatt, K-P. Wieters, Pulver
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assumption allows us to use, instea
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where P is the load, a - radius of
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determination (total running in tim
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μm, compared with Figure 17, wich
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Serbian TribologySocietySERBIIATRIB
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Especially when the chain transfer
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is obvious that this isa so-calledw
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winches. The authors are inclined t
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find parameters of robot laser hard
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each of which is measured by the le
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Fractal dimensions were determined
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Figure 3. Modified force acting sch
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0.25Lubricant: L3DC 04Friction coef
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nanocomposites. The influence of fi
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4. RESULTS AND DISCUSSION4.1 Morpho
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Figure 6. Loading and unloadin vers
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3 8 12 1 4 2 4
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The material after qualifying the r
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It has already been mentioned that
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Degradation & Stability, Vol. 69, N
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conformance to researchers’ requi
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This part is assembled of pneumatic
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matrixes describe the state of the
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values influence of themeasurement
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Figure 1. Friction stir weldinga -
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(t 2 t
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M fr / T [-] [-]10.90.80.70.60.50.4
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M fr / T [-]10.90.80.70.60.50.40.30
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experimentally determined that for
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4. DISCUSSIONAccording to the theor
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2.1 The life cycle of the reportThe
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Obviously the report is checked and
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uticaja na osnovu kompozita, a time
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5. ZAKLJUČCIStruktura tiksolivene
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dobijene različite karakteristike
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vizuelno, na dnevnoj svetlosti, pod
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LITERATURA[1] Зинченко В.
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Slika 1. Rotorni bager - glodar VII
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stvaraju sliku stanja i svoja zapa
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njihovih kotrljanih elemenata. Mere
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postupka i uticaja parametara depoz
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posledica različite raspodele mikr
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ZrO 2 Y 2 O 3 je takođe zbog oksid
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3.2 Pneumatska osetljivostOblast pr
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p mg (δ), koji je zbog malih struj
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PNEUMATIC PROBE HEAD SELECTION FOR
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1. Podsistem kopanja2. Podsistem pr
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Slika 3. Kriva habanjaNa tom dijagr
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Mjereni su parametri habanja i pril
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preše prevladavaju kombinirani uvj
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a) b)Slika 5. Karakteristična mikr
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varijantnih materijala u dostavnom
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Jovanović D. 414, 446KKaleicheva J
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CIP - Каталогизација
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