The micro-nano fibril was prepared by one-pot principle when bamboo pulp fiber was degraded byultrasonic assisted sulfuric acid,and the epoxy resin(EP)curing agent was toughened and modified by multi-scalemicro- nano fibrils. The research results showed that this method could obviously increase the flexibility of EPcuring samples,whose mechanical strength wasn't be reduced. The mechanical properties of EP curing sampleswere relatively maximal because its tensile strength,bend strength and impact strength we...