CN108102138A

CN108102138A - A kind of MoS2- PMMA nanocomposites

Info

Publication number: CN108102138A
Application number: CN201611045680.4A
Authority: CN
Inventors: 刘芳
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-11-24
Filing date: 2016-11-24
Publication date: 2018-06-01

Abstract

A kind of MoS₂PMMA nanocomposites, the nanometer MoS prepared with liquid phase solvent thermal synthesis and process for modifying surface₂As anti-friction composition, the polymethyl methacrylate to wear no resistance (PMMA) is polymer matrix, and MoS is prepared by ultrasonic disperse and the hot casting technology of solution₂/ PMMA nanocomposites.MoS is introduced in polymer matrix PMMA₂Nano-particle, coefficient of friction decreases by more than 50%, and the range of decrease has with MoS₂Addition and the trend increased.The surface modified MoS of cetyl trimethylammonium bromide (CTAB)₂Optimal to PMMA friction reducing effects, adding in mass fraction 5% can make its coefficient of friction reduce by 73%.

Description

A kind of MoS2- PMMA nanocomposites

Technical field

The present invention relates to a kind of composite film material more particularly to a kind of MoS₂- PMMA nanocomposites.

Background technology

Material abrasion be between its surface and contact object generation relative friction move caused by, and occur quality of materials by It is gradually lost or even destroys.Polymer (such as polyphenylene sulfide, polypropylene, polyethylene and organic glass) is used as friction structure material Or Contact Transmission functional component is cost-effective, but fretting wear is serious during use.By taking fourdrinier machine wet end dewatering elements as an example, Profiled sheeting, dewatering plate, the material of dewatering box and suction box are successively by natural wood, the continuous renewal of rubber, polyethylene to ceramics Regenerate, be be exactly be continuously improved dewatering elements polyester webs and paper pulp wash away at a high speed under friction running environment wearability, Service life and cost performance.For polyethylene, even if using ultra high density raw material and heat pressing process to improving its wearability It is extremely limited, also there was only 3 months or so in the service life of behaviour below paper speed 400mmin.Polyethylene dewatering elements are worn Several courses, these courses such as friction, adhesion, surface layer fatigue and erosion can be undergone often sequentially or simultaneously to occur and be overlapped mutually Influence accelerated wear test rate.

Improve its wearability, a kind of very cost effective method is to enhance poly- second with wear-resisting or small coefficient of friction inorganic particulate Alkene, to form wear-resisting type polymer matrix composite.Molybdenum disulfide MoS₂Special hexagonal layered structure, in S-Mo-S layers It arranges around each Mo atoms 6 s atoms, Mo and S ask one metallic bond of covalent bond for close and firm, between S-Mo-S flaggies then Up and down accumulation, interlayer because only lean on weak Van der Waals force combine due to easily slide, so the MoS of low-friction coefficient₂Solid can be used as to moisten Lubrication prescription has very big application potential in Mechanical Contact transmission system.Nanoscale is prepared with liquid phase solvent thermal synthesis and modification technology MoS₂As anti-attrition and reinforcing agent, the PMMA of friction and wear behavior difference is selected to investigate object for polymer matrix, through ultrasonic disperse with The hot casting technology of solution prepares MoS₂/ PMMA nanocomposites can develop wear-resistant self-lubricating type polymer matrix composite.

The content of the invention

The purpose of the invention is to improve the abrasion resistant effect of composite material, a kind of MoS is devised₂- PMMA is nano combined Material.

The technical solution adopted by the present invention to solve the technical problems is：

MoS₂The raw material for preparing of-PMMA nanocomposites includes：Synthesize nanometer MoS₂The reagent used：Sodium molybdate (A.R)（On Extra large colloid chemical plant）.Hydroxylamine hydrochloride (A.R), thiocarbamide (A.R)（Tianjin Standard Science Co., Ltd）.Absolute ethyl alcohol (A.R) （Sinopharm Chemical Reagent Co., Ltd.）.Nanometer MoS₂Surface modification reagent：A.R grades of cetyl trimethylammonium bromides (cTAB).A.R grades of dodecyl sodium sulfates (SDS)（One factory of Shanghai development chemical industry）.Prepare the polymer matrix raw material of composite material： Organic glass PMMA (bussiness class)（One factory of Shanghai chemical industry）.Secondary solvent：Ethyl acetate (A.R)（Chinese medicines group chemical reagent has Limit company）.

MoS₂The preparation process of-PMMA nanocomposites is：4mmol sodium molybdates are dissolved in 60mL volume ratios as 1：1 Alcohol solution in, add in 8mmol hydroxylamine hydrochlorides, stir evenly.Then 8mmol thiocarbamides are added in, it should after being sufficiently stirred Solution is transferred in 100mL reaction kettles, is filtered under diminished pressure after 190 DEG C and for 24 hours synthetic reaction after Temperature fall, deionized water and second Nano flower-like MoS is made after 50 DEG C of 6 h of vacuum drying in product after alcohol respectively washs 3 times₂(it is labeled as MoS₂).For in improvement State primary MoS₂Particle disperses in polymer matrix, compatibility and phase boundary combination effect, using calcine, CTAB and SDS to its into Row is surface modified.MoS₂Calcining is modified (to be labeled as S- MoS₂) it is to calcine primary MoS at 500 DEG C in blanket of nitrogen₂5h is complete Into.The surface modified MoS of organic matter₂It is then in above-mentioned synthesis nano flower-like MoS₂It is added again respectively in system.Have a certain amount of CTAB and SDS, and prepared MoS under identical synthesis condition₂Particle is respectively labeled as CTAB-MoS₂With SDS- MoS₂。 With x-ray diffraction instrument (D8Advance, German Bmker companies), field emission scanning electron microscope (JEOL-JSM-6700F, day This Shimadzu Corporation) characterization MoS₂And its crystal structure and shape characteristic of modified particle.To investigate above-mentioned 4 kinds of MoS₂Particle is with gathering The compatibility of object base is closed, takes a certain amount of primary and modified MoS respectively₂Nano-particle is placed in the test tube equipped with 20mL atoleines In, it after ultrasonication 30min, then shakes test tube and repeatedly stands afterwards, observe particle precipitated and separated situation in each test tube at room temperature, To investigate the dispersion stabilization of 4 kinds of particles.With ethyl acetate dissolving PMMA and scattered primary and its modified MoS₂Powder, the two are mixed Merge and legal system is prolonged with hot-fluid after disperseing through ultrasonic wave (KQ-100 type ultrasonic cleaners, Nanjing An Duo trades Co., Ltd) Into membrane material.Made membrane material for 24 hours, excludes ethyl acetate solvent to prevent it from making to the plasticising of PMMA matrixes in 80 DEG C of vacuum drying With.Treated MoS₂/ PMMA film type composite material is used for structural characterization and tribological property experiment.

MoS₂The detecting step of-PMMA nanocomposites is：Disc type controlled atmosphere friction-wear test is sold with SFT-2M Machine (Ke Kaihua Science and Technology Development Co., Ltd.s in Lanzhou) measures primary and its modified MoS₂Nano-particle, PMMA and its with above-mentioned 4 Kind MoS₂Coefficient of friction frictional experiment conditions under the series composite materials dry condition that nano-particle is formed：Relative humidity RH is 45%-50%, and temperature is 25 DEG C, and atmospheric environment, mating plate sample is diameter 3mm, the GCrl5 bearing steel balls of hardness 6lHRC, Normal load is 50 N, rotating speed 50r/min, fraction time 10min.

The beneficial effects of the invention are as follows：

Nanoscale MoS is prepared with liquid phase solvent thermal synthesis and modification technology₂As anti-attrition and reinforcing agent, friction and wear behavior is selected The PMMA of difference investigates object for polymer matrix, and MoS is prepared through ultrasonic disperse and the hot casting technology of solution₂The nano combined materials of/PMMA Material, can develop wear-resistant self-lubricating type polymer matrix composite.With under 190 DEG C, 24 h conditions hydrothermal synthesis it is primary flower-shaped MoS₂Nano-particle is compared, and cetyl trimethylammonium bromide (CTAB) and dodecyl sodium sulfate (SDS) are surface modified Afterwards in self-lubricating piece, the MoS of layer structure₂500 DEG C of calcining and activatings are modified MoS in particle and nitrogen₂The coefficient of friction of particle is aobvious Writing reduces.Wherein, ctab surface modification effect is the most apparent, and coefficient of friction only has 0.234, than primary flower structure MoS₂ Reduce 67%.PMMA coefficient of frictions are up to 0.65, easily break under being acted on by couple shearing friction power because sliding occurs for macromolecular chain Split caused adhesive wear.Introduce MoS₂After nano-particle, no matter it is flower-shaped or self-lubricating is laminar structured, composite wood Material coefficient of friction is greatly reduced, and decreases by more than 50%, and has with MoS₂Addition and increase trend .CTAB surface modifications change The MoS of property₂Optimal to the friction reducing effect of polymer matrix PMMA, its coefficient of friction of addition mass fraction 5% decreases by 73%, than adding Enter the primary flower-shaped MoS of mass fraction 20%₂Effect is not bad.

Specific embodiment

Case study on implementation 1：

MoS₂The raw material for preparing of-PMMA nanocomposites includes：Synthesize nanometer MoS₂The reagent used：Sodium molybdate (A.R)（On Extra large colloid chemical plant）.Hydroxylamine hydrochloride (A.R), thiocarbamide (A.R)（Tianjin Standard Science Co., Ltd）.Absolute ethyl alcohol (A.R) （Sinopharm Chemical Reagent Co., Ltd.）.Nanometer MoS₂Surface modification reagent：A.R grades of cetyl trimethylammonium bromides (cTAB).A.R grades of dodecyl sodium sulfates (SDS)（One factory of Shanghai development chemical industry）.Prepare the polymer matrix raw material of composite material： Organic glass PMMA (bussiness class)（One factory of Shanghai chemical industry）.Secondary solvent：Ethyl acetate (A.R)（Chinese medicines group chemical reagent has Limit company）.MoS₂The preparation process of-PMMA nanocomposites is：4mmol sodium molybdates are dissolved in 60mL volume ratios as 1：1 Alcohol solution in, add in 8mmol hydroxylamine hydrochlorides, stir evenly.Then 8mmol thiocarbamides are added in, it should after being sufficiently stirred Solution is transferred in 100mL reaction kettles, is filtered under diminished pressure after 190 DEG C and for 24 hours synthetic reaction after Temperature fall, deionized water and second Nano flower-like MoS is made after 50 DEG C of 6 h of vacuum drying in product after alcohol respectively washs 3 times₂(it is labeled as MoS₂).For in improvement State primary MoS₂Particle disperses in polymer matrix, compatibility and phase boundary combination effect, using calcine, CTAB and SDS to its into Row is surface modified.MoS₂Calcining is modified (to be labeled as S- MoS₂) it is to calcine primary MoS at 500 DEG C in blanket of nitrogen₂5h is complete Into.The surface modified MoS of organic matter₂It is then in above-mentioned synthesis nano flower-like MoS₂It is added again respectively in system.Have a certain amount of CTAB and SDS, and prepared MoS under identical synthesis condition₂Particle is respectively labeled as CTAB-MoS₂With SDS- MoS₂。 With x-ray diffraction instrument (D8Advance, German Bmker companies), field emission scanning electron microscope (JEOL-JSM-6700F, day This Shimadzu Corporation) characterization MoS₂And its crystal structure and shape characteristic of modified particle.To investigate above-mentioned 4 kinds of MoS₂Particle is with gathering The compatibility of object base is closed, takes a certain amount of primary and modified MoS respectively₂Nano-particle is placed in the test tube equipped with 20mL atoleines In, it after ultrasonication 30min, then shakes test tube and repeatedly stands afterwards, observe particle precipitated and separated situation in each test tube at room temperature, To investigate the dispersion stabilization of 4 kinds of particles.With ethyl acetate dissolving PMMA and scattered primary and its modified MoS₂Powder, the two are mixed Merge and legal system is prolonged with hot-fluid after disperseing through ultrasonic wave (KQ-100 type ultrasonic cleaners, Nanjing An Duo trades Co., Ltd) Into membrane material.Made membrane material for 24 hours, excludes ethyl acetate solvent to prevent it from making to the plasticising of PMMA matrixes in 80 DEG C of vacuum drying With.Treated MoS₂/ PMMA film type composite material is used for structural characterization and tribological property experiment.MoS₂- PMMA nanometers multiple The detecting step of condensation material is：Friction wear testing machine (the Ke Kaihua scientific and technological developments in Lanzhou of disc type controlled atmosphere are sold with SFT-2M Co., Ltd), measure primary and its modified MoS₂Nano-particle, PMMA and its with above-mentioned 4 kinds of MoS₂The series that nano-particle is formed Coefficient of friction frictional experiment conditions under composite material dry condition：Relative humidity RH is 45%-50%, and temperature is 25 DEG C, greatly Compression ring border, mating plate sample is diameter 3mm, the GCrl5 bearing steel balls of hardness 6lHRC, and normal load is 50 N, rotating speed 50r/ Min, fraction time 10min.

Case study on implementation 2：

Primary MoS₂Average grain diameter about 200-300nm, about 18.2 m of BET surface area²/ g, and by tens to hundreds of a thickness about The nanometer sheet (petal) of 10nm is self-assembled into nano flower-like construction, and calcining is modified to MoS₂Nano flower-like construction influences little.SDS With the MoS of CTAB modifications₂Thin slice or stromatolithic structure is then presented, this illustrates that organic group intervention can cause MoS₂Petal constructs It decomposes slabbing and forms monolithic or lamination under its modification cladding, also indicate this state of aggregation MoS₂Particle can more play MoS₂ Itself stratiform design feature simultaneously is beneficial to form self-lubricating antifriction mechanism under shearing slip state.

Case study on implementation 3：

Room temperature tensile sectional observation shows PMMA more smooth, flat brittleness sections originally, compound primary MoS and SDS- MoS：Matrix PMMA plastic deformation degrees are aggravated after particle, have evolved into the flower-shaped toughness section of three-dimensional cabbage that level enriches, Its fracture mechanism change mainly with Tensile masterpiece used time MoS：It is related that particle plays the role of stress concentration point.It is in addition, more clear Clear MoS₂Particle shape illustrates its compatibility asked with matrix and phase boundary is combined weaker, but SDS- MoS₂Particle divides in the base Dissipate property and the existing improvement of compatibility, cause the surrender of thin slice stratiform PMMA matrixes orientation stretching, curling necking down ductile fracture or The more notable of heart tubular drawing-off structure is rolled up with MoS₂Addition increases, their Dispersed precipitates in matrix gradually appear locality Spherical agglomerated phenomenon compared with the above case, S- MoS₂With CTAB- MoS₂/ PMMA composite material fractures are then hardly visible State the toughness cut surface character of three-dimensional cabbage style, but flatter both particles of class brittleness section are buried in matrix, Show that dispersiveness and compatibility increase significantly better than above two particle with particle content in the base for they, they are in base Concatenation, solid matter piece and stromatolithic structure have been sequentially formed in body and has been stretched the masterpiece used time, has been broken easily in this MoS₂Lamella asks hair It is raw, and flatter class brittleness section is therefore formed as it can be seen that different modifying is modified MoS₂Composite material cross-section morphology difference with MoS₂Particle surface properties and its Assembled distribution state in the base have very big relation, and be firmly adhered to matrix break it is flat The MoS in face₂Particle, string, piece and the stromatolithic structure that especially they are formed, it is important will to form lubrication antifriction mechanisms play in the base Effect.

Case study on implementation 4：

Compared to primary MoS₂The MoS of particle, CTAB, SDS and calcining modification₂Particle friction coefficient significantly reduces.Self assembly piece, The CTAB- MoS of layer construction₂Dynamic antifriction performance is optimal, and coefficient of friction reduces 67%, has given full play between S-Mo-S flaggies Weak Van der Waals force with reference to and the characteristics of easily slide, polymer matrix PMMA solid lubrication anti-friction agents will be served as it and have established base Plinth.PMMA coefficient of frictions are big, easily viscous caused by gliding fracture occurs for macromolecular chain under being acted on by couple shearing friction power Abrasion, there is apparent wide, deep polishing scratch, frictional behaviour is poor.Introduce MoS₂After particle, no matter its be flower-shaped or self-lubricating piece, Layer structure, friction coefficient of composite material are greatly reduced, and decrease by more than 50%, and have with MoS₂Addition and the trend increased. The MoS of ctab surface modification₂Optimal to PMMA friction reducing effects, only its coefficient of friction of the amount of addition mass fraction 5% reduces 73%, than the primary MoS for adding in mass fraction 20%₂Effect is not bad.Can only be seen under the conditions of identical frictional experiment it is slight it is narrow, Shallow polishing scratch, frictional behaviour are substantially improved.It can be seen that MoS₂Nano-particle forms some effective lubrication antifrictions in PMMA Mechanism.

Case study on implementation 5：

Poor or content is more and is in the MoS of aggregating state₂It is mainly dispersed distribution in matrix PMMA, rubs at this time with couple The Cheng Jiti that nuzzles up accounts for that CONTACT WITH FRICTION area is big, and the frictional behaviour of composite material depends primarily upon matrix properties, MoS₂Antifriction function Limited, the coefficient of friction range of decrease is little, and polishing scratch is more clear.With MoS₂Content increases or content is few but energy highly dense uniformly divides It dissipates, MoS in matrix₂Interparticle distance is gradually reduced, and forms the line, piece and layer-by-layer state of series winding, at this moment MoS₂Particle collection accounts for friction and connects The also gradually increase of contacting surface product, the frictional behaviour of composite material switch to depend on MoS₂Property, MoS₂Distinctive lubrication antifriction mechanism is convex Aobvious, coefficient of friction is also just decreased obviously and wearability improves, and not only section tends to flat exquisiteness, and flour milling Friction mark also becomes thin The shallow certain MoS of₂Otherwise content also should not excessively be easy to cause it and disperse uneven in matrix and formed and reunited or lamination is blocked up, drop Low matrix and interparticle phase boundary combination power, even destruction matrix continuity, formation localized voids or ravel area and inducement structure Property slabbing, make instead composite material strength decline and occur premature wear failure therefore, MoS₂Particle addition, which should control, is facing Within boundary's volumetric concentration, such as ctab surface modification MoS₂Add in mass fraction about 5% can PMMA polymer base obtain compared with Good scattered and compatibility, its coefficient of friction is effectively reduced on the basis of composite material overall mechanical properties are ensured.MoS₂Lubrication Antifriction mechanism can be realized by 4 approach.First, addition is low and MoS of relatively independent Dispersed precipitate in the base₂Grain Son is under shearing friction power, because of MoS₂The one-dimensional shearing slip of interlayer or original position that particle layered crystal structure feature itself is occurred The matrix region property lubrication antifriction function that rolls and obtain is second, addition is high and form continuous line, solid matter in the base Piece and the MoS of layer distribution₂Particle, except above-mentioned antifriction mechanism can also be by between particle or the opposite of piece interlayer is slided to play Two dimension or three-dimensional whole lubrication antifriction function.Once third, MoS₂Particle is in itself with the one-dimensional shearing slip of interlayer, so that it may will be shelled From S-Mo-S flaggies constantly move to be layed onto and adjoin on matrix section and further to its lubrication antifriction.Fourth, it is removed by shearing MoS₂Also it can be shifted to fricting couple piece face and form MoS on the face₂Self-lubricating film layer is filled in idol as the 3rd media In the trench of part rough surface or between two rubbing surfaces, to prevent to contact directly between friction is secondary or sliding friction switched to rolling friction Reach antifriction function when this 4 kinds of lubrication antifriction mechanism sequentially or simultaneously occur, MoS₂Lubrication antifriction is cooperateed with to polymer matrix Best results.

Claims

1. a kind of MoS₂- PMMA nanocomposites, preparing raw material includes：Synthesize nanometer MoS₂The reagent used：Sodium molybdate (A.R)（Shanghai colloid chemical plant）；Hydroxylamine hydrochloride (A.R), thiocarbamide (A.R)（Tianjin Standard Science Co., Ltd）；Anhydrous second Alcohol (A.R)（Sinopharm Chemical Reagent Co., Ltd.）；Nanometer MoS₂Surface modification reagent：A.R grades of cetyl trimethyls Ammonium bromide (cTAB)；A.R grades of dodecyl sodium sulfates (SDS)（One factory of Shanghai development chemical industry）；Prepare the polymer of composite material Based raw material：Organic glass PMMA (bussiness class)（One factory of Shanghai chemical industry）；Secondary solvent：Ethyl acetate (A.R)（Chinese medicines group chemistry Reagent Co., Ltd）.

2. MoS according to claim 1₂- PMMA nanocomposites, it is characterized in that MoS₂- PMMA nanocomposites Preparation process is：4mmol sodium molybdates are dissolved in 60mL volume ratios as 1：In 1 alcohol solution, 8mmol hydrochloric acid hydroxyls are added in Amine stirs evenly；Then 8mmol thiocarbamides are added in, the solution is transferred in 100mL reaction kettles after being sufficiently stirred, through 190 DEG C and Be filtered under diminished pressure for 24 hours after synthetic reaction after Temperature fall, deionized water and ethyl alcohol respectively the product after washing 3 times in 50 DEG C of vacuum drying Nano flower-like MoS is made after 6 h₂(it is labeled as MoS₂)；To improve above-mentioned primary MoS₂Particle disperses in polymer matrix, phase Capacitive and phase boundary combination effect are surface modified modification using calcining, CTAB and SDS to it；MoS₂Calcining modification (is labeled as S-MoS₂) it is to calcine primary MoS at 500 DEG C in blanket of nitrogen₂5h is completed；The surface modified MoS of organic matter₂It is then above-mentioned Synthesize nano flower-like MoS₂It is added again respectively in system；There is an a certain amount of CTAB and SDS, and it is prepared under identical synthesis condition MoS₂Particle is respectively labeled as CTAB-MoS₂And SDS-MoS_2；With x-ray diffraction instrument (D8Advance, German Bmker companies), Field emission scanning electron microscope (JEOL-JSM-6700F, Japanese Shimadzu Corporation) characterizes MoS₂And its crystal knot of modified particle Structure and shape characteristic；To investigate above-mentioned 4 kinds of MoS₂The compatibility of particle and polymer matrix takes a certain amount of primary and modified respectively MoS₂Nano-particle is placed in the test tube equipped with 20mL atoleines, after ultrasonication 30min, then shake test tube repeatedly after it is quiet It puts, observes particle precipitated and separated situation in each test tube at room temperature, to investigate the dispersion stabilization of 4 kinds of particles；It is molten with ethyl acetate Solve PMMA and scattered primary and its modified MoS₂Powder, the two mix and through ultrasonic wave (KQ-100 type ultrasonic cleaners, Nanjing An Duo trades Co., Ltd) it is scattered after membrane material is made with the hot-fluid method of prolonging；Made membrane material for 24 hours, is excluded in 80 DEG C of vacuum drying Ethyl acetate solvent is to prevent its plasticization to PMMA matrixes；Treated MoS₂/ PMMA film type composite material supplies structure Characterization is used with tribological property experiment.

3. MoS according to claim 1₂- PMMA nanocomposites, it is characterized in that MoS₂- PMMA nanocomposites Detecting step is：With SFT-2M pins disc type controlled atmosphere friction wear testing machine (limited public affairs of Ke Kaihua scientific and technological developments in Lanzhou Department), measure primary and its modified MoS₂Nano-particle, PMMA and its with above-mentioned 4 kinds of MoS₂The serial composite wood that nano-particle is formed Expect the coefficient of friction frictional experiment conditions under dry condition：Relative humidity RH is 45%-50%, and temperature is 25 DEG C, big compression ring Border, mating plate sample for diameter 3mm, the GCrl5 bearing steel balls of hardness 6lHRC, normal load be 50 N, rotating speed 50r/min, Fraction time is 10min.

4. MoS according to claim 1₂- PMMA nanocomposites, it is characterized in that with liquid phase solvent thermal synthesis and modification Technology prepares nanoscale MoS₂As anti-attrition and reinforcing agent, the PMMA of friction and wear behavior difference is selected as polymer matrix investigation pair As preparing MoS through ultrasonic disperse and the hot casting technology of solution₂/ PMMA nanocomposites can develop wear-resistant self-lubricating type and gather Close object based composites；With the primary flower-shaped MoS of hydrothermal synthesis under 190 DEG C, 24 h conditions₂Nano-particle is compared, cetyl It is in self-lubricating piece, layer structure after trimethylammonium bromide (CTAB) and dodecyl sodium sulfate (SDS) are surface modified MoS₂500 DEG C of calcining and activatings are modified MoS in particle and nitrogen₂The coefficient of friction of particle significantly reduces；Wherein, ctab surface is repaiied Decorations modified effect is the most apparent, and coefficient of friction only has 0.234, than primary flower structure MoS₂Reduce 67%；PMMA coefficient of frictions Up to 0.65, the adhesive wear under being acted on by couple shearing friction power easily caused by gliding fracture occurs for macromolecular chain；Draw Enter MoS₂After nano-particle, no matter it is flower-shaped or self-lubricating is laminar structured, and friction coefficient of composite material is greatly reduced, More than 50% is decreased by, and is had with MoS₂Addition and the surface modified MoS of trend .CTAB increased₂To polymer matrix PMMA Friction reducing effect it is optimal, add in mass fraction 5% its coefficient of friction and decrease by 73%, than the primary flower for adding in mass fraction 20% Shape MoS₂Effect is not bad.