Functionalized Soybean Oil- and Vanillin-Based Dual Cure Photopolymerizable System for Light-Based 3D Structuring

Abstract

A novel dual cure photopolymerizable system was developed by combining two plant-derived acrylic monomers, acrylated epoxidized soybean oil and vanillin dimethacrylate, as well as the thiol monomer pentaerythritol tetrakis (3-mercaptopropionate). Carefully selected resin composition allowed the researchers to overcome earlier stability/premature polymerization problems and to obtain stable (up to six months at 4 °C) and selectively-polymerizable resin. The resin demonstrated rapid photocuring without an induction period and reached a rigidity of 317.66 MPa, which was more than 20 times higher than that of the other vanillin-based polymers. Improved mechanical properties and thermal stability of the resulting cross-linked photopolymer were obtained compared to similar homo- and copolymers: Young’s modulus reached 4753 MPa, the compression modulus reached 1634 MPa, and the temperature of 10% weight loss was 373 °C. The developed photocurable system was successfully applied in stereolithography and characterized with femtosecond pulsed two-beam initiation threshold measurement for the first time. The polymerization threshold of the investigated polymer was determined to be controlled by the sample temperature, making the footprint of the workstations cheaper, faster, and more reliable.

Soybean Oil‐Based 3D Printed Mesh Designed for Guided Bone Regeneration (GBR) in Oral Surgery

“…The degree of swelling is directly related to the crosslink density; it can be concluded that the 3D printed samples have a high crosslinking degree. [ 35 ]…”

“…The degree of swelling is directly related to the crosslink density; it can be concluded that the 3D printed samples have a high crosslinking degree. [35] The DSC performed on the cured sample confirmed the amorphous phase of the resin and allowed for the identification of the glass transition temperature. Indeed no melting or crystallization peaks had been detected; on the other hand a variation of the slope of the signal is clearly visible in Figure 6a, corresponding to the glass transition temperature (T g ) of 15.6 °C.…”

Glycerol Acrylate-Based Photopolymers with Antimicrobial and Shape-Memory Properties

“…However, their swelling values in toluene were lower (1.48–9.14%) indicating that these polymers are not easily soluble in toluene. GDMA- and GTMA-based polymers ( B2 , B3 , B5 and B6 ) showed higher swelling values in toluene than in acetone due to their structure being more similar to the non-polar solvent toluene than to the polar solvent acetone [ 35 ].…”

Thermoresponsive Shape-Memory Biobased Photopolymers of Tetrahydrofurfuryl Acrylate and Tridecyl Methacrylate

“…The type of solvent also affected the swelling of the polymers. Polymers showed the higher swelling value in toluene than in acetone because the structure of the synthesized polymers was more similar to that of the nonpolar solvent toluene than to the polar solvent acetone [ 31 ].…”