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About NanoLUB

NanoLub® is based on NIS’ unique patented technology using solid tungsten disulfide (WS₂) multilayered

nano fullerene-like particles. These unique multi-layer IF-WS₂nano-spheres are well-known to show

outstanding temperature (-270 °C to 450 °C) shock (5,076,000 PSI) and pressure (4,263,000

PSI) resistance and renders them to be !ersatile under e"treme operating conditions including high and

ultra-lo# temperatures high pressure and high !acuum high load high rotating speed high radiation and

corrosion conditions.

$ue to its si%e (50-200 nm) and morphology of I-WS₂ nanoparticles they easily fill the asperities and

irregular surface of the metals pro!iding e"cellent load bearing and anti-#ear properties. &nder high

loads (!" #Pa) the layers peels from the spheres forming a thin protecti!e monolayer of WS₂ on the

surface of the metal thereby reducing friction and wear between the metals.

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Preparation of tungsten disulde motor oil and its

tribological characteristics

2.1 Preparation of materials 2.1.1

!lt"#fne tun$sten d%sulfde powde"s &un$sten d%sulfde doesn't d%ssol(e %n w#te")o%l) #lcohol) $"e#se #nd othe" o"$#n%c %mp"e$n#nts) #nd doesn't d%ssol(e %n

ecumen%c l%*uo"s o #c%d.

  +t c#n ,e lu,"%c#t%(e o" # lon$ t%me ,elow 425 -. +n (#cuum) %ts d%s#ssem,l

tempe"#tu"e %s 1 150 -. &un$sten d%sulfde's %ntens%t o #nt%p"essu"e %s 21 #.

Tungsten disulde’s radio resistance is better than that of graphite and

molybdenum disulde. +t h#s n%ce" lu,"%c#t%n$ c#p#,%l%t%es) not onl #ppl%c#,le to

the usu#l lu,"%c#t%(e cond%t%on) ,ut #lso to the "%$o"ous wo"k en(%"onment) such #s

h%$h tempe"#tu"e) h%$h p"essu"e) h%$h (#cuum) h%$h lo#d) "#d%o#ct%(e #nd mo"d#nt

med%um

2.1.3 Function additives 

n the ,#s%s o the snthet%c#l cons%de"#t%on o d%spe"s%n$ p"ope"t o tun$sten

d%sulfde %n moto" o%l #nd the #nt%we#" #nd #nt%"%ct%on p"ope"t) ox%d#t%(e st#,%l%t)

(%scos%t (e"sus tempe"#tu"e p"ope"t o moto" o%l) the ollow%n$ unct%on #dd%t%(es

we"e selected: d"ess%n$ #$ent) dete"s%(e) d%spe"s#nt) #nt%ox%d#nt #nd #nt%co""os%on)

#nt%we#" #$ent #nd #nt%"%ct%on) o%l%ness %mp"o(e") "ust %nh%,%to") pou" %nh%,%to" #nd

k%lo#m1011.

 &#,le 2 "ope"t p#"#mete"s o th"ee k%nds o moto" o%l +tems

%nem#t%c (%scos%t/mm2 s1 9%scos%t %ndex /; < /; <%#mete" o wo"n

spotwe#"%n$ o" 30 m%n/mm 40 - 100 -

9/40 9/100 9.+. uzu"#

=hell hel%x ult"# moto" o%l 83.13 12.5> 131 0.45

?"e#t w#ll moto" o%l 143.00 15.6 110 0.47

 &un$sten d%sulfde moto" o%l 146.00 18.4 126 0.40

!onclusions 

1） su"#ce em,ell%sh%n$ the ult"#fne tun$sten d%sulfde powde"s) tun$sten

d%sulfde w#s #ppl%ed %nto moto" o%l) #nd one k%nd o o%l) the tun$sten d%sulfde moto"

o%l %n wh%ch tun$sten d%sulfde powde"s #"e suspended ste#d%l w#s p"ep#"ed.

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2） &he o%l flm st"en$th o th%s k%nd o moto" o%l %s "espect%(el 1.06 #nd 1.38 t%mes

o th#t o shell hel%x ult"# moto" o%l #nd $"e#t w#ll moto" o%l) #nd %ts s%nte"%n$ lo#d %s

1.75 #nd 2.33 t%mes o th#t o them) #nd when test%n$ unde" 3>2 ;) 1 450 "/m%n #nd

30 m%n) the "%ct%on coe@c%ents o "%ct%on p#%"s lu,"%c#ted , the tun$sten d%sulfde

moto" o%l dec"e#se w%th the %nc"e#se o t%me. e#nwh%le) the d%#mete" o wo"n spot

%s sm#ll) #nd the su"#ce o wo"n spot %s smooth) w%thout o,(%ous u""ows. &hese%nd%c#te th#t the tun$sten d%sulfde moto" o%l h#s ,ette" lu,"%c#t%n$ p"ope"t%es th#n

wellAknown moto" o%l %n ou" count" #nd o(e"se#s

3）Bhen t#k%n$ the tun$sten d%sulfde moto" o%l #s lu,"%c#t%n$ med%um) the su"#ce

o "%ct%on p#%"s c#n o"m # m%xed p"otect%(e flm) wh%ch %ncludes phs%c#l #dso",ed

flm) chem%c#l "e#ct%(e flm #nd tun$sten d%sulfde depos%t%on#l flm. &he m%xed

p"otect%(e flm m#kes the tun$sten d%sulfde moto" o%l d%spl# excellent #nt%we#")

#nt%"%ct%on #nd ext"eme p"essu"e p"ope"t%es) #nd th%s k%nd o moto" o%l c#n "educe

the exh#ust em%ss%on #nd o%l w#st#$e) enh#nce the uel econom #nd %mp"o(e the

en(%"onment) so %t %s # k%nd o en(%"onmentp"otect%(e #nd ene"$As#(%n$ moto" o%l.