《Vegetable oil-based thiol-ene/thiol-epoxy resins for laser direct writing 3D micro-/nano-lithography》 was written by Grauzeliene, Sigita; Navaruckiene, Aukse; Skliutas, Edvinas; Malinauskas, Mangirdas; Serra, Angels; Ostrauskaite, Jolita. Electric Literature of C4H6N2This research focused onvegetable oil thiol ene epoxy resin laser direct writing; biobased polymer; click reactions; dual curing; laser direct writing; linseed oil; optical 3D printing; soybean oil; thiol-ene; thiol-epoxy. The article conveys some information:
The use of renewable sources for optical 3D printing instead of petroleum-based materials is increasingly growing. Combinations of photo- and thermal polymerization in dual curing processes can enhance the thermal and mech. properties of the synthesized thermosets. Consequently, thiol-ene/thiol-epoxy polymers were obtained by combining UV and thermal curing of acrylated epoxidized soybean oil and epoxidized linseed oil with thiols, benzene-1,3-dithiol and pentaerythritol tetra(3-mercaptopropionate). Thiol-epoxy reaction was studied by calorimetry. The changes of rheol. properties were examined during UV, thermal and dual curing to select the most suitable formulations for laser direct writing (LDW). The obtained polymers were characterized by dynamic-mech. thermal anal., thermogravimetry, and mech. testing. The selected dual curable mixture was tested in LDW 3D lithog. for validating its potential in optical micro- and nano-additive manufacturing The obtained results demonstrated the suitability of epoxidized linseed oil as a biobased alternative to bisphenol A diglycidyl ether in thiol-epoxy thermal curing reactions. Dual cured thermosets showed higher rigidity, tensile strength, and Young’s modulus values compared with UV-cured thiol-ene polymers and the highest thermal stability from all prepared polymers. LDW results proved their suitability for high resolution 3D printing-individual features reaching an unprecedented 100 nm for plant-based materials. Finally, the biobased resin was tested for thermal post-treatment and 50% feature downscaling was achieved. In the part of experimental materials, we found many familiar compounds, such as 1-Methyl-1H-imidazole(cas: 616-47-7Electric Literature of C4H6N2)
1-Methyl-1H-imidazole(cas: 616-47-7) is used as a precursor for the synthesis of pyrrole-imidazole polyamides, ionic liquids such as 1-butyl-3-methylimidazolium hexafluorophosphate.Electric Literature of C4H6N2
Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem