Dissertation > Excellent graduate degree dissertation topics show

An Investigation on Tribological Properties of Poly (Vinylidene Fluoride)(PVDF) and Its Nanocomposites

Author: PengQingYi
Tutor: LiTongSheng
School: Fudan University
Course: Polymer Chemistry and Physics
Keywords: Poly (vinylidene fluoride) (PVDF) friction wear nano-PTFE nano-SiC nano-clay nanocomposites
CLC: TB383.1
Type: Master's thesis
Year: 2009
Downloads: 173
Quote: 2
Read: Download Dissertation

Abstract


As one of the most important fluoropolymers,PVDF has been widely used in a number of applications.But little attention has been paid to potential application in tribological field. In order to improve the tribological properties of PVDF,PVDF/nano-clay, PVDF/nano-PTFE,PVDF/nano-SiC composites were prepared.The tribological behaviors of the nanocomposites against 45# carbon steel ring were evaluated on a block-on-ring type(M-2000) wear tester.Universal testing mechine, Transmission electron microscopy(TEM),Dynamic mechanical analysis(DMA),Thermo gravimetric analysis(TGA),Differential scanning calorimetry(DSC),X-ray diffraction (XRD)and Fourier transform infrared spectroscopy(FTIR) were used to characterize the mechanical properties,dispersion effects,thermal properties and crystallinity properties respectively.Scanning electron microscope(SEM) was used to observe the morphology of worn surface,counterface and wear debris for understanding the wear mechanism.Relative conclusions were summarized as follows:1.The comprehensive performance including tribological properties of PVDF/nano-PTFE composites prepared by the mechanical/twin screw extrusion technique were better than that prepared by the solution-cast technique.2.Effects of the three kinds ofnano-filler are as follows:the friction coefficient and wear rate of PVDF/nano-PTFE composites decreased by 60%and 70%respectively at most; the decrease for PVDF/clay nanocomposites is about 25%at most for both friction coefficent and wear rate;while nano-SiC has little possitive effect for the tribological properties of PVDF.3.Nano-PTFE can reduce the friction coefficient,so that inhibit the temperature rise during sliding and so reduce the plastic deformation of the composites,so wear rate decreased as nano-PTFE content increased.While at the same time,the formation of transfer film and wear debris adhered to the worn surface caused by the nano-PTFE act as lubricating elements also reduce friction coefficient and wear rate.Lower content of nano-clay can improve the tribological of the materials,which may be due to the crystal form of PVDF transform fromα-toβ-form.

Related Dissertations

  1. Reactive Hot-Pressing and Mechanical Properties of （ZrB2-ZrO2）/BN Composites,TB332
  2. Optimizition of Compositions and Processing Parameters and Wear Properties of Cemented Carbides YG11R Modified by Nanosized Rare Earth,TG135.5
  3. EDM Electrode Wear Mechanism and Control Research,TG661
  4. Analysis of Flexspline Stress and Tooth Wear in Harmonic Gear Drive,TH132.43
  5. Global Stability of Telescopic Boom with Impact of Lap between Booms and Friction,TH211.6
  6. Study on Contact Fatigue Life Based on Grease Variation with Temperature,TH117.22
  7. The Study of Control Algorithm for Automotive Power Window Based on Lin Bus,U463.6
  8. Research and Development of Wear Resistance for Physically Disabled Men Jackets,TS941.2
  9. Poly(L-lactide) Nanocomposites Containing Octaglycidylether Polyhedral Oligomeric Silsesquioxane: Prepartion, Structure and Properties,R318.08
  10. Comparing Alumina Ceramic-on-ceramic with Metal-on-conventionalpolyethylene Bearings in Total Hip Arthroplasty,R687.4
  11. Preparation and Characterization of Multifunctional Fe3O4/ZnO/SiIO2 Nanocomposites,TB383.1
  12. Study on the Dry Cutting Performance of Austenitic Stainless Steel 0Cr18Ni9,TG142.71
  13. Preperation of Low Friction and Wear Resistant High-Purity Alumina Ceramic,TQ174.1
  14. Magnesium chloride / montmorillonite composite catalyst containing titanium and Polymerization of Ethylene,TB383.1
  15. Endogenous iron-based composites and tribology research,TB331
  16. Ethylenediamine assisted magnetic Pd / Fe 3 O 4 control of the ball Preparation and Properties,TB383.1
  17. Situ (Ti, W) C particle reinforced steel matrix composites and organizational performance research,TB331
  18. Poly ( urethane - vinyl imidazole ) copolymer / graphene nano- composites,TB383.1
  19. SST -based soft abrasive and impact stream flow and experimental study of mechanical properties,TG664
  20. Performance Comparision on Ultra-thin Wearning Course of Asphalt Mixture,U414
  21. Development of High-performance Modified Asphalt Emulision for Ultra-thin Wearing Course Interlayer Bonding Materials,U414

CLC: > Industrial Technology > General industrial technology > Materials science and engineering > Special structural materials
© 2012 www.DissertationTopic.Net  Mobile