Strengthening, toughening, and self‐healing for carbon fiber/epoxy composites based on PPESK electrospun coaxial nanofibers,Journal of Applied Polymer Science

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Strengthening, toughening, and self‐healing for carbon fiber/epoxy composites based on PPESK electrospun coaxial nanofibers
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2020-10-14 , DOI: 10.1002/app.50063
Shilun Ruan _{1,

2,

3} , Shuya Wei ₁ , Wenzheng Gong ₄ , Zheng Li ₁ , Junfeng Gu ₁ , Changyu Shen _{1,

2}

Affiliation

A carbon fiber/epoxy composite modified by electrospun coaxial dicyclopentadiene/poly(phthalazinone ether sulfone ketone) (DCPD/PPESK) nanofibers was successfully fabricated, and the addition of DCPD/PPESK fibrous membranes made the composite have remarkable self‐healing ability, and meanwhile effectively improve its mechanical properties. Results of polarization microscope observation and thermogravimetric analysis confirmed liquid DCPD as the healing agent was encapsulated into the PPESK coaxial nanofiber. Three‐point bending test was utilized to evaluate the mechanical properties and self‐healing effect of the composite. Experimental results indicated that the embedded nanofibers significantly improved the toughness of the composite, and maintained good mechanical properties even at low resin content. Most importantly, the flexural strength of the composite recovered to close to 90% observed 2 h after the bending failure.

中文翻译：

基于PPESK电纺同轴纳米纤维的碳纤维/环氧树脂复合材料的增强，增韧和自修复

成功制备了电纺同轴二环戊二烯/聚酞菁醚砜酮（DCPD / PPESK）纳米纤维改性的碳纤维/环氧树脂复合材料，并添加了DCPD / PPESK纤维膜，使复合材料具有出色的自修复能力，同时有效改善其机械性能。偏光显微镜观察和热重分析的结果证实，液态DCPD作为愈合剂被封装在PPESK同轴纳米纤维中。采用三点弯曲试验评估复合材料的力学性能和自愈效果。实验结果表明，包埋的纳米纤维可显着提高复合材料的韧性，即使在低树脂含量下也能保持良好的机械性能。最重要的是，

更新日期：2020-12-14

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