Synthesis and performance study of enzymatic hydrolyzed lignin based epoxy resin
In this study,enzymatic lignin was used as a synthetic raw material instead of bisphenol A,and reacted chemically with epichlorohydrin to successfully prepare enzymatic lignin based epoxy resin.Amine curing agents were used to cure it.The curing kinetics equation of enzymatically hydrolyzed lignin based epoxy resin was speculated through n-level model analysis.The study comprehensively evaluated the cured product of enzymatically hydrolyzed lignin based epoxy resin using mechanical property testing,infrared spectroscopy,thermogravimetric analysis(TGA),and differential scanning calorimetry(DSC).The results showed that when the proportion of enzymatic lignin replacing bisphenol A reached 20%,the comprehensive performance of enzymatic lignin based epoxy resin reached its optimum,with a tensile strength of 58.8 MPa and a notch impact strength of 6.9 kJ/m².Thermogravimetric analysis shows that the cured product of enzymatically hydrolyzed lignin based epoxy resin has good thermal stability.
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