Facile in situ preparation of high-performance epoxy vitrimer from renewable resources and its application in nondestructive recyclable carbon fiber composite

Abstract

A high-performance epoxy vitrimer was facilely prepared from a renewable lignin derivative vanillin, and its carbon-fiber composites were nondestructively recycled.

Recent Research Progress on Lignin-Derived Resins for Natural Fiber Composite Applications

“…Due to the higher char yield, these showed the potential use in high-performance materials. Wang and coworkers [ 163 ] reported the high-performance VN Schiff-based epoxy composite, i.e., CF/MB-PACM, which was prepared by the mixing of 3-methoxy-4-(oxiran-2-ylmethoxy) benzaldehyde(MB) and 4,4′-Methylenebiscyclohexanamine (PACM), followed by coating it on the carbon fiber (CF). CF/MB-PACM composite exhibited tensile strength (81 MPa) and T g (172 °C) near the commercial CF/DER331-PACM composite.…”

Fully Biobased Vitrimers from Glycyrrhizic Acid and Soybean Oil for Self-Healing, Shape Memory, Weldable, and Recyclable Materials

“…The group of Zhu found that the Schiff base covalent vitrimers prepared from vanillin exhibited the high performance beyond the ones from commercial bisphenol A epoxy resin, [26][27][28] and could be facilely recycled from carbon fiber reinforced composites. 27,28 However, in these reported works tedious chemical modifications on biological resources were necessary to offer reactive sites for curing. Therefore, we find necessary to develop the fully biobased vitrimers using renewable resources without excessive chemical modification before curing.…”

Reprocessable and Shape Memory Thermosetting Epoxy Resins Based on Silyl Ether Equilibration

“…A Schiff base epoxy thermoset was prepared from a synthesized formyl group–containing vanillin‐based monoepoxide and a diamine via in situ formation. Due to the vitrimer or covalent adaptable network nature of Schiff base network, it exhibited superior reprocessing recyclability . By introducing carbonate linkages, a kind of hydroxyl‐functionalized polycarbonate networks were fabricated with transcarbonation exchange reactions at elevated temperatures in the presence of catalytic Ti(IV) alkoxides .…”