Biobased and Degradable Thiol-Ene Networks from Levoglucosan for Sustainable 3D Printing

Levoglucosan is a renewable chemical obtained in excessive yields from pyrolysis of cellulosic biomass, which provides wealthy performance for artificial modification and crosslinking. Right here, we report the facile and scalable synthesis of a household of biobased networks from triallyl levoglucosan and multifunctional thiols through UV-initiated thiol-ene click on chemistry. The multifunctional thiols utilized on this research can be sourced from renewable feedstocks, resulting in general very excessive bio-based content material of the synthesized levoglucosan networks. The thermomechanical and hydrolytic degradation properties of the resultant networks are tailor-made primarily based on the kind and stoichiometric ratio of thiol crosslinker employed. The Younger’s modulus and glass transition temperature of levoglucosan-based networks is tunable over the big selection of three.3 MPa to 14.5 MPa and −19.4 ℃ to six.9 ℃, respectively. The levoglucosan-based thermosets exhibit glorious thermal stability with Td,10%> 305 ℃ for all networks. The suitability of those resin formulations for extrusion-based 3D printing was demonstrated utilizing a UV-assisted direct ink write (DIW) system creating 3D printed elements with glorious constancy. Hydrolytic degradation of those 3D printed elements through ester hydrolysis demonstrated that levoglucosan-based resins are glorious candidates for sustainable fast prototyping and mass manufacturing functions. General, this work shows the utility of levoglucosan as a renewable platform chemical that allows entry to tailor-made thermosets vital in functions starting from 3D printing to biomaterials.