期刊
POLYMER CHEMISTRY
卷 12, 期 37, 页码 5342-5356出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1py00715g
关键词
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资金
- National Natural Science Foundation of China [51974345, 51874331, 51501226]
- Shandong Provincial Natural Science Foundation, China [ZR2019MEM054, 2019GGX102004, ZR2020ME014]
- Fundamental Research Funds for the Central Universities [19CX05001A, 20CX02311A, YCX2020079]
- China Postdoctoral Science Foundation [2020M682260]
The study developed imine-based epoxy composites enhanced by surface modified halloysite nanotubes with excellent self-healing efficiency and mechanical properties. Addition of 3 wt% of SiUr@HNTs improves self-healing performance and mechanical properties. The composites also exhibit good thermal stability and solvent resistance.
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.
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