Surface modified halloysite nanotube enhanced imine-based epoxy composites with high self-healing efficiency and excellent mechanical properties,Polymer Chemistry

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Surface modified halloysite nanotube enhanced imine-based epoxy composites with high self-healing efficiency and excellent mechanical properties
Polymer Chemistry ( IF 4.1 ) Pub Date : 2021-08-26 , DOI: 10.1039/d1py00715g
Hao Jiang ₁ , Meng Cheng ₁ , Caijiao Ai ₁ , Fanjie Meng ₁ , Yizeng Mou ₁ , Shuangqing Sun _{1,

2} , Chunling Li _{1,

2} , Songqing Hu _{1,

2}

Affiliation

Self-healing materials with high self-healing efficiency and excellent mechanical properties are desired for practical applications. Herein, imine-based epoxy composites enhanced by surface modified halloysite nanotubes (SiUr@HNTs) were fabricated. According to DSC curves, epoxy composites with 3 wt% of SiUr@HNTs have an excellent cure state. The addition of 3 wt% of SiUr@HNTs not only gives a certain fluidity to the composites to improve the self-healing performance (the tensile strength can restore to 7.10 MPa and the self-healing efficiency can reach 99.8%), but SiUr@HNTs can also be used as a mechanical enhancer to enhance the mechanical properties (the tensile strength increases from 5.16 MPa to 7.12 MPa). In addition, the epoxy composites can withstand large stretching and a weight of more than 400 g after ex situ self-healing. Besides, the epoxy composites have great thermal stability and solvent resistance. In general, this work proposed a method to improve the mechanical properties of self-healing materials, which is promising in the development of high-strength self-healing composite materials.

中文翻译：

表面改性埃洛石纳米管增强亚胺基环氧复合材料具有高自愈效率和优异的机械性能

具有高自愈效率和优良机械性能的自愈材料是实际应用中所需要的。在此，制备了表面改性埃洛石纳米管（SiUr@HNTs）增强的亚胺基环氧复合材料。根据 DSC 曲线，含有 3 wt% SiUr@HNTs 的环氧复合材料具有优异的治愈状态。添加3 wt%的SiUr@HNTs不仅赋予复合材料一定的流动性以提高自修复性能（拉伸强度可恢复至7.10 MPa，自修复效率可达99.8%），而且SiUr@ HNTs 也可以作为机械增强剂来提高机械性能（拉伸强度从 5.16 MPa 增加到 7.12 MPa）。此外，环氧树脂复合材料在异位自愈后可承受较大的拉伸和超过400g的重量。此外，环氧复合材料具有良好的热稳定性和耐溶剂性。总的来说，这项工作提出了一种提高自修复材料力学性能的方法，在开发高强度自修复复合材料方面具有广阔的应用前景。

更新日期：2021-09-07

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