Self-extracted corn-stalk cellulose/epoxy resin composites

Abstract

In order to make full use of crop waste stalk, corn-stalk cellulose (CSC) was extracted by acid-base method and used as modifier of epoxy resin (E51) to prepare the self-extracted corn-stalk cellulose / epoxy resin composites (CSCEC). Thermogravimetry (TG) analysis, dynamic mechanical analysis (DMA), morphology analysis by scanning electron microscope (SEM), the mechanical properties by electronic universal testing machine and impact testing machine were used for characterization and analysis. The experimental results showed that when the CSC content was 20 wt%, the impact strength of the composite was 2.50 kJ /m2, which was 127.2% higher than that of pure epoxy resin. Meanwhile, the tensile and bending strength were slightly increased, and the storage modulus (E') of epoxy resin was also slightly increased, indicating that the addition of CSC could toughen the epoxy resin. When the CSC content was 20 wt%, the Tg of epoxy resin obtained by DMA was the lowest, 167.4 ℃, which decreased by 11.3 ℃ compared with that of pure epoxy resin.