Processing in Supercritical Carbon Dioxide

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Processing in Supercritical Carbon Dioxide
Yusuf Menceloglu

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Objectives

• To utilise liquid and supercritical carbon
  dioxide (CO2) as a processing media
• Design polymeric and oligomeric surfactants that
  can form micelle for polar and nonpolar materials
  in SCF CO2
• To understand the intermolecular solute solvent
  interactions in SCF CO2 for the formation of
  stable micelles, emulsions, microemulsions and
  nanoparticle dispersions.

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Innovation

• Carbon dioxide (CO2) has emerged as perhaps the
  most promising green-friendly alternative
  solvent
• Supercritical carbon dioxides unusual
  combination of physical properties can be used to
  develop new processes
• Textile dyeing
• 157 nm photoresist processing
• Self assembly
• Nanoparticles

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Workplan

• Develop polymerization protocol to enable the
  synthesis of block copolymer or oligomers
  containing fluorinated chains
• Prepare series of surfactants with various block
  lengths and structures
• Characterize the solution properties of these
  materials
• Utilise the appropriate products to solubilise
  hydrophilic and hydrophobic materials in carbon
  dioxide

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Involving EC

• Project requires expertise and resources in
  several scientific and technological fields
  including
• processing equipment
• surfactant rheology
• small angle neutron scattering characterization
• small angle X-ray scattering characterization
• applications to the nano-technology
• Project can be regarded as a part of the
  nano-technologies and new production process

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Communitys Social Objectives

• Supercritical CO2 technology has significant
  potential for solvent replacement. CO2 is
  relatively non toxic non-flammable, and has
  minimal environmental impact
• Supercritical CO2 technology has wide
  applicability to reactions, extractions,
  chromagraphy, particle formations, and cleaning
• Supercritical CO2 processing does not create
  environmental pollution and save energy due to
  the simple separation

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Value Added

• Supercritical CO2 system avoiding effluents and
  leading to energy and water savings
• Industrial valorisation has already been made in
  food industry
• New surfactant will overcome problems associated
  with low dielectric constant and low polarity
• Surfactans will make processing in CO2 more
  efficient way