# Continuous Sustainable Production of Biobased Multicomponent Enhanced Resin for SLA 3D Printing

## TL;DR

This paper presents a sustainable method to produce a biobased resin for 3D printing with improved mechanical and thermal properties.

## Contribution

The novel synthesis of VanDiMMA and its use in a biobased resin with enhanced performance compared to commercial alternatives.

## Key findings

- VanDiMMA showed comparable diluting properties to IBOMA but better mechanical and thermal performance.
- VanDiMMA-containing resin achieved a tensile strength of 12.7 MPa and a heat-resistant index of 169.5 °C.
- The method uses potassium acetate as a more suitable catalyst than DMAP for the synthesis.

## Abstract

This work focuses on biobased reactive diluents’
synthesis,
continuing with optimized oil-based resin precursor production. Our
approach introduces vanillin methacrylate (VanMMA), cinnamyl methacrylate
(CinMMA), and vanillyl dimethacrylate (VanDiMMA) synthesis using methacrylic
anhydride. The introduced approach involves an innovative and available
catalyst, potassium acetate, which possesses much suitable potential
compared with the usually used 4-dimethylaminopyridine (DMAP). Moreover,
we separated the formed secondary product, methacrylic acid (MA),
and used it to modify rapeseed oil to prepare a curable thermoset.
All synthesized products were structurally verified via complex cross-analysis
(NMR, ESI-MS, and FTIR). The reactive systems were mixed to form a
multicomponent mixture appropriate for stereolithography (SLA) and
3D printing. It was found that VanDiMMA exhibited comparable diluting
properties to the commercially available and used compound, isobornyl
methacrylate (IBOMA), while achieving better mechanical, thermo-mechanical,
and thermal properties than IBOMA. VanDiMMA-containing SLA resin reached
a tensile strength of 12.7 ± 0.3 MPa, a flexural strength of
16.8 ± 0.4 MPa, a storage modulus of 570 MPa at 30 °C, a
glass-transition temperature of 83.7 °C, and the heat-resistant
index of 169.5 °C.