Fabrication of 3D conjugated polymer structures via vat polymerization additive manufacturing

These results show that the line width initially increases slowly with increasing irradiation, yielding a width close the desired 40 μm line width, but diverges quickly with irradiation energies greater than 12.5 J/cm2

Andrew T Cullen

2019

Scholarcy highlights

  • Smart materials possess unique properties that allow them the convert energy from one form to another through intrinsic material properties
  • The advancement of Liquid crystal display technology in consumer devices has resulted in the highresolution displays which can operate in the UV spectrum, allowing them to be used for vat polymerization additive manufacturing
  • The hybrid pyrrole-UDMA polymer formulation presented exhibited a significant improvement in mechanical integrity, allowing it to be used with a free-surface vat polymerization additive manufacturing system to fabricate 3D structures. While this progress is an important milestone towards the fabrication of active 3D conjugated polymer devices, the current polymer has a number challenges that must be overcome to improve the performance of devices made from this hybrid polymer formulation
  • The blend of Bisphenol A ethoxylate dimethacrylate and poly(ethylene glycol) methyl ether methacrylate as the secondary polymer exhibited an improved compatibility with polypyrrole to yield an overall polymer with enhanced mechanical integrity at a reduced secondary polymer concentration compared to the PPy-UDMA formulation
  • The enhanced mechanical integrity allowed more complex micro-scale 3D structures to be fabricated with the high resolution free-surface vat polymerization additive manufacturing system
  • The use of BEMA and PEGMA resulted in a significant increase in the ionic conductivity which is required for the fabrication of conjugated polymer actuators
  • Future studies are required to identify the affect of each component in the polymer formulation on the resulting material properties to identify the optimal concentration of each reagent

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