Dissertation > Excellent graduate degree dissertation topics show

Synthesis of Silicon-Containing Polyacetylenes and the Gas Separation Ability of Their Membranes

Author: WangJianJun
Tutor: SuLiQiang
School: Qiqihar University
Course: Analytical Chemistry
Keywords: Phenylacetylene Membrane Helix Sense Structure Gas Separation
CLC: TQ320.721
Type: Master's thesis
Year: 2012
Downloads: 40
Quote: 0
Read: Download Dissertation


Poly(phenylacetylene) have widely attracted attention because of their unique propertiesand application in electronic, magnetic and chiral polymer materials. Phenylacetylene withlarge side groups can be polymerized by rhodium catalyst and get the polymers with goodsolubility and high molecular weight. This kind of phenylacetylene polymers have conjugatedmain chain with alternating single-double bond structure. The polymer has good mechanicalproperties due to the hard main-chain. In order to get poly(phenylacetylene) materials whichhave better flexibility and higher gas permeability, we have synthesized four monomers:4-trimethylsilylphenylacetylene (SPA, M1),4-dimethylsilylphenylacetylene (HSPA, M2),1-(1-heptamethyltrisiloxanyl)-4-{4-ethynyl-2,6-bis(hydroxymethyl)-1-phenoxymethyl}benzene (S3BDHPA, M3) and OEDHPA.In this paper, four new monomers are designed and the synthetic route and the reactionconditions of the monomers are discussed. Then confirmed the structure of these monomersusing nuclear magnetic resonance (1H-NMR) and determine the best synthetic conditions forthese monomers.The polymerization and copolymerization of HSPA are carried out using the[Rh(nbd)Cl]2as a catalyst, PEA and TEA as a cocatalyst respectively.The results indicatethat the [Rh(nbd)Cl]2/PEA catalyst system is the best one for this polymerization. Thestructure of the resulted polymers were confirmed by the NMR spectra, IR spectra and the gelpermeation chromatography (GPC).In this research, we discussed the polymerization of OEDHPA in the achiral and chiralcatalytic system and get the results that the polymerization initiated by the catalytic systemconsisting of Rh[(nbd)Cl]2and chiral amine (R)-PEA or (S)-PEA can provide one-handhelical polymer. We confirmed the helical structure of the polymer by the CD-UV spectra.Then we also carried out the Hex-Sence-Selective Polymerization of S3BDHPA under thiscatalytic system and get the trimer through the light irradiation of the polymer membrane.For the last part, the permeability and permselectivity of the copoly(HSPA/SPA) weretested and the reasons for the results have been discussed deeply. At the same time, we usingthe cyclic tirmer and different basic membranes to get the homogeneous and heterogeneousblend membranes through different membrane fabrication methods and confirm the structureof the blend membranes by ATR-IR spectra and water contact angle on the membranes’ surface. The permselectivity and permeability of these blend membranes were tesed and theresults have been discussed in this paper.

Related Dissertations

  1. The Research of the Sludge Characteristics in the Cephalosporin Intermediate Pharmaceutical Wastewater by the Treatment of the NMBR,X787
  2. Proteomic Research of Rice Plasma Membrane Protein under Blast Stress,S511
  3. Effects of Selenium on Synaptosome Membrane Fluidity and PSD-93 of Hippocampus in Rats with Drinking Water Flurosis,R599
  4. The Effect of Low Temperature Stress on Fatty Acid of Cell Membrane in Alfalfa Crowns,S541.9
  5. Preparation and Pervaporation of Hydrophobic Nano-silica Filled PDMS/PET Composite Membrane,TQ028.8
  6. Study on Design and Improvement of Mycophenolic Acid Extraction Process,TQ921
  7. High-level Expression and Purification of Fusion Protein Polh-N141,Q78
  8. Architectural membrane modification and UV coating properties,TU561.6
  9. The Manufacture and Properties Studies of PTFE Architectural Membrane Structure Materials,TU599
  10. Multi- stage membrane process in Printing and Dyeing Wastewater Treatment Research,X791
  11. Automated welding boiler membrane wall design and research,TG409
  12. Quaternary ammonium salt of chitosan and its composite membrane development and performance evaluation,TB383.2
  13. Sulfonated poly ether sulfone ultrafiltration membrane and Performance,TB383.2
  14. A / O ~ 4 - membrane bioreactor fluorescent dye wastewater treatment,X703.1
  15. Multi-block type sulfonated poly ether sulfone proton exchange membrane preparation and properties of,TM911.4
  16. Air-cooled proton exchange membrane fuel cell dynamics control and performance testing of,TM911.4
  17. New fuel cell electrolyte membrane polyether sulfone Preparation and Properties,TM911.4
  18. SMPU / PNIPAM semi-interpenetrating polymer networks thermo-sensitive permeable membranes,O631.3
  19. Based on the pulse of PVDF piezoelectric film sensor design,TP212
  20. SOI-based materials research and design of micro-pressure sensors,TP212
  21. Ordered Nanoporous Carbon Membrane Preparation and Characterization,TB383.2

CLC: > Industrial Technology > Chemical Industry > Synthetic resins and plastics industry > General issues > Products and testing > Various shapes of products > Film
© 2012 www.DissertationTopic.Net  Mobile