Vanillin Acrylate-Based Resins for Optical 3D Printing.

Aukse Navaruckiene,Sigita Kasetaite,Sima Rekštytė,Jolita Ostrauskaite,Mangirdas Malinauskas,Edvinas Skliutas,Danguole Bridziuviene,Vita Raudoniene

doi:10.3390/polym12020397

Aukse Navaruckiene, Sigita Kasetaite + Show 6 more

Open Access

https://doi.org/10.3390/polym12020397

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Abstract

The investigation of biobased systems as photocurable resins for optical 3D printing has attracted great attention in recent years; therefore, novel vanillin acrylate-based resins were designed and investigated. Cross-linked polymers were prepared by radical photopolymerization of vanillin derivatives (vanillin dimethacrylate and vanillin diacrylate) using ethyl(2,4,6-trimethylbenzoyl)phenylphosphinate as photoinitiator. The changes of rheological properties were examined during the curing with ultraviolet/visible irradiation to detect the influences of solvent, photoinitiator, and vanillin derivative on cross-linking rate and network formation. Vanillin diacrylate-based polymers had higher values of yield of insoluble fraction, thermal stability, and better mechanical properties in comparison to vanillin dimethacrylate-based polymers. Moreover, the vanillin diacrylate polymer film showed a significant antimicrobial effect, only a bit weaker than that of chitosan film. Thermal and mechanical properties of vanillin acrylate-based polymers were comparable with those of commercial petroleum-derived materials used in optical 3D printing. Also, vanillin diacrylate proved to be well-suited for optical printing as was demonstrated by employing direct laser writing 3D lithography and microtransfer molding techniques.

Highlights

VIS or near IR radiation instead of linearly absorbed UV light
For 2D or quasi-3D structures, Polymers 2020, 12, microtransfer molding can be used. It employs the solidification of a resin inside the soft mold, replicating the master structure that lithography) can bethe used
UV/Vis curing tests were performed with resins containing 1 mol of vanillin derivative (VDM or vanillin diacrylate (VD)) and 1, 3, or 5 mol.% of photoinitiator (TPOL) (Table 1) on a MCR302 rheometer (Anton Paar, Graz, Austria) equipped with the plate/plate measuring system

Summary

Introduction

VIS or near IR radiation instead of linearly absorbed UV light This way a nonlinear light–matter interaction is achieved that confines the absorption and, subsequently, the cross-linking reaction in a small volume inside the resin, enabling full 3D (nonlayered) fabrication of structures with subwavelength feature sizes [5]. Polymers 2020, 12, 397 a nonlinear light–matter interaction is achieved that confines the absorption and, subsequently, the cross-linking reaction in a small volume inside the resin, enabling full 3D (nonlayered) fabrication of 397 structures with subwavelength feature sizes [5]. For 2D or quasi-3D structures, Polymers 2020, 12, microtransfer molding (nanoimprint lithography) can be used It employs the solidification of a resin (usually by UV light or thermally) inside the soft mold, replicating the master structure that lithography) can bethe used. This the technique is especially suitable in cases when many identical inside the soft mold, replicating the master structure that was used to create the mold

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