关键词:
bionics
stress buffer
carbon fiber reinforced composites
interfacial performances
toughness
摘要:
Carbon fiber reinforced polymer composites(CFRPs)possess contrastingly high strength but low toughness,which limits their application under special circumstances,such as high stress,cryogenic temperatures,or *** chemical inertness and smooth surface of carbon fiber(CF)are the main reasons behind the low toughness of CFRPs,characterized by poor interfacial performances,including low strength and low *** organisms possess structures or chemical compositions that contribute to exhibiting strong interfacial ***,we construct a mussels-inspired supramolecular stress buffer(i.e.,Fe(III)-tannic acid buffer,Fe-TA buffer)on CF to distribute stress and improve the interfacial performances and toughness of *** Fe-TA buffer can improve interfacial performances by rough biomimetic interfacial structure,introducing multiple supramolecular interfacial interactions and improving interfacial wettability,ultimately resolving the common issue of low toughness in the *** the presence of Fe-TA buffer,the interfacial shear strength(IFSS)value and mode II critical strain energy release rate(GIIC)value are enhanced by 17.0%and 41.8%,*** research provides a design for a stress buffer between resin matrix and inorganic enhancer which results in high interfacial strength and toughness.