MWCNT对玻纤复合材料界面黏合性及其影响机制

发布时间：2018-04-09 07:51

本文选题：多壁碳纳米管　切入点：玻纤织物　出处：《南京工业大学学报(自然科学版)》2017年05期

【摘要】：通过超声浸渍法将改性多壁碳纳米管(MWCNT)均匀分布于玻纤织物(GFf)表面,得到MWCNT-GFf预增强体,解决基于树脂传递原理制备含MWCNT玻纤复合材料中出现MWCNT被织物阻挡的难题,得到性能稳定的含MWCNT玻纤复合材料。利用万能材料试验机、动态热机械分析仪、场发射电镜等手段,研究复合材料层间剪切性能及MWCNT对其黏合性能的影响机制。结果表明:与GFf复合材料相比,含MWCNT玻纤复合材料层间剪切力可提高约40%,界面黏合强度明显提高。适量氨基硅烷(KH550)可促进MWCNT在MWCNT-GFf上分布均匀,提高层间和纤维之间的界面黏合。MWCNT明显提高了玻纤表面粗糙度,部分可形成似"倒刺"结构,提高复合材料的界面黏合性。过量MWCNT或过量KH550反而降低复合材料的界面黏合性。
[Abstract]:The modified multiwalled carbon nanotubes (MWCNTs) were uniformly distributed on the surface of glass fiber fabric by ultrasonic impregnation, and the MWCNT-GFf prereinforced was obtained, which solved the problem that MWCNT was blocked by fabric in the preparation of glass fiber composites containing MWCNT based on the resin transfer principle.MWCNT glass fiber composites with stable properties were obtained.The interlaminar shear properties of composites and the influence of MWCNT on the adhesion properties of composites were studied by means of universal material testing machine, dynamic thermal mechanical analyzer and field emission electron microscope.The results show that the interlaminar shear force of the glass fiber composites containing MWCNT can be increased by about 40%, and the interfacial bonding strength is obviously increased compared with the GFf composites.Proper amount of aminosilane can promote the distribution of MWCNT on MWCNT-GFf, increase the interfacial adhesion between interlayer and fiber, improve the surface roughness of glass fiber, and partly form a "barbed" structure, and improve the interfacial adhesion of the composite.Excessive MWCNT or excessive KH550 decreased the interfacial adhesion of the composites.
【作者单位】：河海大学力学与材料学院;
【基金】：中央高校基本科研业务费专项资金(2016B45414)
【分类号】：TB332

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