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 vibration...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 vibration.The 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 toughness.Biological organisms possess structures or chemical compositions that contribute to exhibiting strong interfacial adhesions.Herein,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 CFRPs.The 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 CFRPs.In 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%,respectively.This research provides a design for a stress buffer between resin matrix and inorganic enhancer which results in high interfacial strength and toughness.展开更多
In the microelectronics era,electromagnetic radiation and thermal accumulation from electronic devices can detrimentally impact sensor performance and seriously damage human health.Despite the pressing need,synthesizi...In the microelectronics era,electromagnetic radiation and thermal accumulation from electronic devices can detrimentally impact sensor performance and seriously damage human health.Despite the pressing need,synthesizing high-performance multifunctional composite remains a formidable challenge.Herein,we report the fabrication of heterostructured carbon fiber(CF)@SnO_(2)nanosheet using CF as a template,followed by activation pretreatment,hydrothermal in-situ growth,and sulfur-oxygen substitution.This approach yielded CF reinforced polyether ether ketone(CF/PEEK)composites with enhanced interfacial performances,exceptional electromagnetic interference(EMI)shielding effectiveness,and high thermal conductivity(TC).The interlaminar shear strength(ILSS)of the composite achieved a remarkable 87.86 MPa,underscoring the robust interfacial integration that significantly bolsters EMI shielding and TC.As a result,the composite demonstrated a notable enhancement in EMI shielding effectiveness and TC by 22.85%and 52.83%,respectively.The strategy of integrating structural and functional elements is instrumental in the advancement of innovative high-performance multifunctional composite.These composites are poised to serve not only as critical structural components in aerospace applications but also to extend their utility into the realm of precision electronics,offering a promising horizon for future technological innovations.展开更多
基金supported by the National Natural Science Foundation of China(21673015)。
文摘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 vibration.The 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 toughness.Biological organisms possess structures or chemical compositions that contribute to exhibiting strong interfacial adhesions.Herein,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 CFRPs.The 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 CFRPs.In 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%,respectively.This research provides a design for a stress buffer between resin matrix and inorganic enhancer which results in high interfacial strength and toughness.
基金support from the Major Basic Research Project of Natural Science Foundation of Shandong Province(No.ZR2021ZD21)Key Research and Development Plan of Shandong Province(No.2021ZLGX01)+1 种基金National Natural Science Foundation of China for Youths(No.52203264)Natural Science Foundation of Shandong Province for Youths(No.ZR2021QE113).
文摘In the microelectronics era,electromagnetic radiation and thermal accumulation from electronic devices can detrimentally impact sensor performance and seriously damage human health.Despite the pressing need,synthesizing high-performance multifunctional composite remains a formidable challenge.Herein,we report the fabrication of heterostructured carbon fiber(CF)@SnO_(2)nanosheet using CF as a template,followed by activation pretreatment,hydrothermal in-situ growth,and sulfur-oxygen substitution.This approach yielded CF reinforced polyether ether ketone(CF/PEEK)composites with enhanced interfacial performances,exceptional electromagnetic interference(EMI)shielding effectiveness,and high thermal conductivity(TC).The interlaminar shear strength(ILSS)of the composite achieved a remarkable 87.86 MPa,underscoring the robust interfacial integration that significantly bolsters EMI shielding and TC.As a result,the composite demonstrated a notable enhancement in EMI shielding effectiveness and TC by 22.85%and 52.83%,respectively.The strategy of integrating structural and functional elements is instrumental in the advancement of innovative high-performance multifunctional composite.These composites are poised to serve not only as critical structural components in aerospace applications but also to extend their utility into the realm of precision electronics,offering a promising horizon for future technological innovations.
