Dissertation > Excellent graduate degree dissertation topics show

Synthesis and Properties on Polyurenthane/Graphene Multiphase Composites

Author: CaoYaKun
Tutor: YuZhongZhen
School: Beijing University of Chemical Technology
Course: Materials Science and Engineering
Keywords: graphene polyurethane compistes electricalconductivity excluded volume principle
CLC: TQ323.8
Type: Master's thesis
Year: 2012
Downloads: 348
Quote: 0
Read: Download Dissertation

Abstract


In2004, Geim and co-workers of the University of Manchestersucceeded in discovering of graphene which can exit stability bymicromechanical cleavage of small mesas of highly oriented pyrolyticgraphite.This new carbon material with the thickness of only about1nm.Enormous attention has been paid to graphene due to its abundantsources,low cost,outstanding performance and important applicationprospect in the fields of material,electronic,information,energy andbiological medicine, etc. For this reason, a large number of researchersbegan the research for the found of graphene and a new technologyrevolution in21st has been raised.Polyurethane,a special synthetic material, synthesized by additionpolymerization from polylol and isocyanates,can be designed by choosingvarious reactants, their ratio and their synthesis procedure. Great influencecan be bring in by the change of hard segment of polyurethane.The mainwork is as follows: 1.A series of PU/graphene biphase compistes and PU/graphene/hollowglass microsphere triphase composites with different hard segments weresynthesized via in-suit polymerization of polypropylene glycol (PPG2000)and polybutylene adipate (PBA2000) as the hybrid polyatomic,toluenediisocynate (TDI) as the isocyanate,4,4’-methylenebis(2-chloroaniline)(MOCA) as the chain extender.2.We discussed the microcosmic performance,electrical conductivity,thermal stability, hardness, dimensional stability of the biphase compisteseffected by the different hard segments and the addition of graphene. Ourdata suggest that with the join of graphene, we can see lower tendency tophase segregation and at the same time,the crystallisation of lower hardsegments compistes suffered less impact compared to higher hard segmentscompistes. With the join of graphene,the electrical conductivity ofPU/graphene biphase compistes grow rapidly,and for the same amount ofgraphene, the electrical conductivity of lower hard segment contentcompistes is higher than the composites which with higher hard segmentcontent. What is more, the thermal stability, hardness and dimensionalstability of the PU/graphene biphase compistes enhanced by the addition ofgraphene.3.On the basis of the above study,we discussed the microcosmicperformance,electrical conductivity, thermal stability, hardness,dimensional stability of the PU/graphene/hollow glass microsphere triphase compistes effected by the the addition of graphene and hollow glassmicrosphere. The result indicates that with the introduction of hollow glassmicrosphere as the ternary filler,the electrical conductivity has been furtherimproved. At the same time, the thermal stability,hardness and imensionalstability increased by the addition of graphene.

Related Dissertations

  1. Synthesis and Biocompatibility of different types of hydrophilic surface - modified polyurethane,R318.08
  2. Synthesis and Study on Graphene and Co3O4/Graphene Composite about the Characteristics of Electrochemistry,O613.71
  3. Hydrophilic structure of different types of surface -modified polyurethane material and coagulation 12 factor nine peptide fragments,and fibrinogen P1 fragment of computer simulation of the interaction,O631.3
  4. Research on PSA/Cotton Blend Fabric of Coatinging of Water Resistance and Moisture Permeability,TS195.6
  5. Prototype Development of Intimate Apparel Mannequin,TS941.2
  6. Synthesis and Properties of the new anti-clotting material in modified ammonium phosphate zwitterion,R318.08
  7. Preparation and Application of Water-based Polyurethane to Improve Wet Rubbing Fastness,TS193.2
  8. Preparation of graphene Defects,O613.71
  9. WC / graphene composite electronic structure and electron transport properties,O613.71
  10. Low Temperature Synthesis of High-quality Graphene and Its Application in Water Pollution Treatment,X703
  11. First-Principles Study of Si/Ge Adsorption on Doping Graphene,O469
  12. Theoretical study M_x (M = Cu, Ag, Au) / graphene structure and stability,O613.71
  13. Preparation and Properties of Reinforcements/ Polyacrylonitrile Composite Nanofibers,TB383.1
  14. Polyethylenimine-Grafted Graphene Oxide as an Efficient Gene Delivery Vector,R450
  15. Study on the Preparation of Graphene by Electrochemical Method and Adsorption of Heavy Metalion,O613.71
  16. Synthesis, Modification of Dimer Acid Diisocyanate and It’s Application on Fabric Finishing,TS190.2
  17. Preparation of Poly(vinyl Alcohol)/Polyurethane Blend Nanofiber Mats and Their Fluorescent Modification,TB383
  18. Preparation, Characterization, and Application in Polymer Composites of Graphene,TB383.1
  19. The Electronic Properties of Graphene,O481
  20. Spin-polarization and Magnetoresistance in Graphene-based Resonant-tunnelling Structures,O482.5
  21. Studies on the Application of Graphene Modified Electrodes in Electrochemical Biosensors,O657.1

CLC: > Industrial Technology > Chemical Industry > Synthetic resins and plastics industry > Polycondensation resin and plastic > Polyurethane (poly carbamate ) and plastic
© 2012 www.DissertationTopic.Net  Mobile