自组装蒙脱土-碳纳米管对玻纤增强复合材料力学及界面性能的影响

Effect of self-assembled montmorillonite-carbon nanotubes on mechanical and interfacial properties of glass fiber-reinforced composites

为改善玻璃纤维复合材料的界面性能,本文先将一维管状多壁碳纳米管(MWCNTs)与二维层状蒙脱土(Mt)自组装形成蒙脱土-碳纳米管(Mt-MWCNTs)杂化纳米材料,再将其负载于玻璃纤维织物表面;最后通过真空袋压成型法制备含Mt-MWCNTs环氧复合材料。结果表明:MWCNTs能够抑制Mt堆叠,而Mt能提高MWCNTs分散,层状Mt和管状MWCNTs可协同增强增韧复合材料;相比于空白对比样,含Mt-MWCNTs环氧复合材料的层间剪切强度提高了约28%,拉伸强度及模量分别提升约24%和25%,弯曲强度及模量分别提升了约19%和23%;玻璃化转变温度提高了近5℃。

To improve interfacial properties of glass fiber composites,a self-assembly of one-dimensional(1 D)tubular multi-walled carbon nanotubes(MWCNTs)and two-dimensional(2 D)layered montmorillonite(Mt)was performed to prepare 1 D/2 D Mt-MWCNTs nanohybrid,followed by the deposition of such nanohybrid onto the surface of glass fiber fabrics.Finally,the epoxy composite containing Mt-MWCNTs was prepared based on the vacuum bag molding process.The results show that the MWCNTs in hybrids could prevent the stacking of Mt,and layered Mt also could increase the dispersion of MWCNTs;layered Mt and tubular MWCNTs could synergistically strengthen and toughen epoxy composites.Compared with blank sample without Mt-MWCNTs,the interlaminar shear strength of epoxy composites containing Mt-MWCNTs was enhanced by about 28%,tensile strength and modulus of such composite were raised by 24%and 25%,respectively,and its flexural strength and modulus were promoted by 19%and 23%,respectively;the glass transition temperature of such composite increased by nearly 5℃.