High biorenewable content acrylate photocurable resins for DLP 3D printing

Abstract

Green chemistry and green engineering concepts have been combined to develop novel sustainable polymeric materials. Solvent free photocurable acrylate resins with biorenewable carbon content of 75%–82% suitable for application in DLP 3D printing technology were composed by commercially available bio‐based materials, acrylated epoxidized soybean oil (AESO), isobornyl methacrylate (IBOMA), methacrylic ester (ME), tetrahydrofurfuryl acrylate (THFA), and tetrahydrofurfuryl methacrylate (THFMA). They demonstrated high printing accuracy and good adhesion between layers. The monitoring of photocross‐linking kinetics of high biorenewable content acrylate photoresins by the real‐time photorheometry and analysis of their rheological parameters was carried out. Synthesized polymers exhibited high yield of insoluble fraction and thermal decomposition temperature at the weight loss of 10% above 300°C. Polymers AESO/IBOMA and AESO/THFMA showed the highest values of tensile modulus and tensile strength. Biodegradability of the synthesized polymers AESO/ME, AESO/THFA, and AESO/THFMA was investigated by measuring oxygen consumption in a closed respirometer. Such AESO‐based polymers can be a competitive solution to replace petroleum‐derived polymeric materials in additive manufacturing and reduce the environmental impact.

Digital Light Processing of Dynamic Bottlebrush Materials

“…The simple addition of lipoicacidfunctionalized macromonomers-accessible in one synthetic step from cheap and bioderived starting materials-to traditional acrylatebased monomer formulations yields resins with fast curing kinetics, generating dynamic and supersoft materials with significantly smaller storage moduli (G′ ≈ 100 kPa) than typical 3Dprinted rubbers (G′ ≈ 1000 kPa). [52,53] By virtue of the dynamic disulfide bonds incorporated throughout the polymer network, objects printed from these resins can be reshaped and healed after expe riencing damage. These findings expand the types of proper ties that can be achieved by DLP and add to the contemporary toolbox of resin chemistry for lightbased 3D printing.…”

Photosensitive acrylates containing bio‐based epoxy‐acrylate soybean oil for 3D printing application

“…EASO is a high viscous liquid and contains a high concentration of various functional groups such as acrylic, epoxy, and hydroxy groups 22,23 . EASO has been successfully used for the development of 4D scaffolds 17 ; more recently, Lebedevaite et al 24 combined EASO with commercially available bio‐based materials to develop a resin for printing complex structures. Their resins showed a biorenewable carbon content within 75% and 82%, a high curing rate and tunable mechanical properties.…”

Morphological, mechanical, magnetic, and thermal properties of 3D printed functional polymeric structures modified with Fe2O3 nanoparticles

“…AM technologies have also provided a great advantage in upstream energy consumption by eliminating processing steps and scrap material features. [15][16][17] The most widely preferred AM methods are stereolithography (SLA), [18,19] digital light processing (DLP), [20,21] fused deposition modeling (FDM), [22,23] selective laser sintering (SLS), [24,25] and selective laser melting (SLM). [26,27] SLA, one of the extremely advanced AM techniques, is widely used in the production of high-resolution polymeric structures.…”